Repository: hbase-site Updated Branches: refs/heads/asf-site 8e541fb05 -> bcb555af5
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/bcb555af/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html index 8cb24b3..bd3c59e 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/bucket/BucketCache.BucketEntry.html @@ -426,1268 +426,1286 @@ <span class="sourceLineNo">418</span> * @param inMemory if block is in-memory<a name="line.418"></a> <span class="sourceLineNo">419</span> * @param wait if true, blocking wait when queue is full<a name="line.419"></a> <span class="sourceLineNo">420</span> */<a name="line.420"></a> -<span class="sourceLineNo">421</span> public void cacheBlockWithWait(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.421"></a> +<span class="sourceLineNo">421</span> private void cacheBlockWithWait(BlockCacheKey cacheKey, Cacheable cachedItem, boolean inMemory,<a name="line.421"></a> <span class="sourceLineNo">422</span> boolean wait) {<a name="line.422"></a> -<span class="sourceLineNo">423</span> if (LOG.isTraceEnabled()) LOG.trace("Caching key=" + cacheKey + ", item=" + cachedItem);<a name="line.423"></a> -<span class="sourceLineNo">424</span> if (!cacheEnabled) {<a name="line.424"></a> -<span class="sourceLineNo">425</span> return;<a name="line.425"></a> -<span class="sourceLineNo">426</span> }<a name="line.426"></a> -<span class="sourceLineNo">427</span><a name="line.427"></a> -<span class="sourceLineNo">428</span> if (backingMap.containsKey(cacheKey) || ramCache.containsKey(cacheKey)) {<a name="line.428"></a> -<span class="sourceLineNo">429</span> Cacheable existingBlock = getBlock(cacheKey, false, false, false);<a name="line.429"></a> -<span class="sourceLineNo">430</span><a name="line.430"></a> -<span class="sourceLineNo">431</span> try {<a name="line.431"></a> -<span class="sourceLineNo">432</span> int comparison = BlockCacheUtil.validateBlockAddition(existingBlock, cachedItem, cacheKey);<a name="line.432"></a> -<span class="sourceLineNo">433</span> if (comparison != 0) {<a name="line.433"></a> -<span class="sourceLineNo">434</span> if (comparison < 0) {<a name="line.434"></a> -<span class="sourceLineNo">435</span> LOG.warn("Cached block contents differ by nextBlockOnDiskSize. Keeping cached block.");<a name="line.435"></a> -<span class="sourceLineNo">436</span> return;<a name="line.436"></a> -<span class="sourceLineNo">437</span> } else {<a name="line.437"></a> -<span class="sourceLineNo">438</span> LOG.warn("Cached block contents differ by nextBlockOnDiskSize. Caching new block.");<a name="line.438"></a> -<span class="sourceLineNo">439</span> }<a name="line.439"></a> -<span class="sourceLineNo">440</span> } else {<a name="line.440"></a> -<span class="sourceLineNo">441</span> String msg = "Caching an already cached block: " + cacheKey;<a name="line.441"></a> -<span class="sourceLineNo">442</span> msg += ". This is harmless and can happen in rare cases (see HBASE-8547)";<a name="line.442"></a> -<span class="sourceLineNo">443</span> LOG.warn(msg);<a name="line.443"></a> -<span class="sourceLineNo">444</span> return;<a name="line.444"></a> -<span class="sourceLineNo">445</span> }<a name="line.445"></a> -<span class="sourceLineNo">446</span> } finally {<a name="line.446"></a> -<span class="sourceLineNo">447</span> // return the block since we need to decrement the count<a name="line.447"></a> -<span class="sourceLineNo">448</span> returnBlock(cacheKey, existingBlock);<a name="line.448"></a> -<span class="sourceLineNo">449</span> }<a name="line.449"></a> -<span class="sourceLineNo">450</span> }<a name="line.450"></a> -<span class="sourceLineNo">451</span><a name="line.451"></a> -<span class="sourceLineNo">452</span> /*<a name="line.452"></a> -<span class="sourceLineNo">453</span> * Stuff the entry into the RAM cache so it can get drained to the persistent store<a name="line.453"></a> -<span class="sourceLineNo">454</span> */<a name="line.454"></a> -<span class="sourceLineNo">455</span> RAMQueueEntry re =<a name="line.455"></a> -<span class="sourceLineNo">456</span> new RAMQueueEntry(cacheKey, cachedItem, accessCount.incrementAndGet(), inMemory);<a name="line.456"></a> -<span class="sourceLineNo">457</span> if (ramCache.putIfAbsent(cacheKey, re) != null) {<a name="line.457"></a> -<span class="sourceLineNo">458</span> return;<a name="line.458"></a> -<span class="sourceLineNo">459</span> }<a name="line.459"></a> -<span class="sourceLineNo">460</span> int queueNum = (cacheKey.hashCode() & 0x7FFFFFFF) % writerQueues.size();<a name="line.460"></a> -<span class="sourceLineNo">461</span> BlockingQueue<RAMQueueEntry> bq = writerQueues.get(queueNum);<a name="line.461"></a> -<span class="sourceLineNo">462</span> boolean successfulAddition = false;<a name="line.462"></a> -<span class="sourceLineNo">463</span> if (wait) {<a name="line.463"></a> -<span class="sourceLineNo">464</span> try {<a name="line.464"></a> -<span class="sourceLineNo">465</span> successfulAddition = bq.offer(re, DEFAULT_CACHE_WAIT_TIME, TimeUnit.MILLISECONDS);<a name="line.465"></a> -<span class="sourceLineNo">466</span> } catch (InterruptedException e) {<a name="line.466"></a> -<span class="sourceLineNo">467</span> Thread.currentThread().interrupt();<a name="line.467"></a> -<span class="sourceLineNo">468</span> }<a name="line.468"></a> -<span class="sourceLineNo">469</span> } else {<a name="line.469"></a> -<span class="sourceLineNo">470</span> successfulAddition = bq.offer(re);<a name="line.470"></a> -<span class="sourceLineNo">471</span> }<a name="line.471"></a> -<span class="sourceLineNo">472</span> if (!successfulAddition) {<a name="line.472"></a> -<span class="sourceLineNo">473</span> ramCache.remove(cacheKey);<a name="line.473"></a> -<span class="sourceLineNo">474</span> cacheStats.failInsert();<a name="line.474"></a> -<span class="sourceLineNo">475</span> } else {<a name="line.475"></a> -<span class="sourceLineNo">476</span> this.blockNumber.increment();<a name="line.476"></a> -<span class="sourceLineNo">477</span> this.heapSize.add(cachedItem.heapSize());<a name="line.477"></a> -<span class="sourceLineNo">478</span> blocksByHFile.add(cacheKey);<a name="line.478"></a> -<span class="sourceLineNo">479</span> }<a name="line.479"></a> -<span class="sourceLineNo">480</span> }<a name="line.480"></a> -<span class="sourceLineNo">481</span><a name="line.481"></a> -<span class="sourceLineNo">482</span> /**<a name="line.482"></a> -<span class="sourceLineNo">483</span> * Get the buffer of the block with the specified key.<a name="line.483"></a> -<span class="sourceLineNo">484</span> * @param key block's cache key<a name="line.484"></a> -<span class="sourceLineNo">485</span> * @param caching true if the caller caches blocks on cache misses<a name="line.485"></a> -<span class="sourceLineNo">486</span> * @param repeat Whether this is a repeat lookup for the same block<a 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class="sourceLineNo">497</span> if (re != null) {<a name="line.497"></a> -<span class="sourceLineNo">498</span> if (updateCacheMetrics) {<a name="line.498"></a> -<span class="sourceLineNo">499</span> cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.499"></a> -<span class="sourceLineNo">500</span> }<a name="line.500"></a> -<span class="sourceLineNo">501</span> re.access(accessCount.incrementAndGet());<a name="line.501"></a> -<span class="sourceLineNo">502</span> return re.getData();<a name="line.502"></a> -<span class="sourceLineNo">503</span> }<a name="line.503"></a> -<span class="sourceLineNo">504</span> BucketEntry bucketEntry = backingMap.get(key);<a name="line.504"></a> -<span class="sourceLineNo">505</span> if (bucketEntry != null) {<a name="line.505"></a> -<span class="sourceLineNo">506</span> long start = System.nanoTime();<a name="line.506"></a> -<span class="sourceLineNo">507</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.507"></a> -<span class="sourceLineNo">508</span> try {<a name="line.508"></a> -<span class="sourceLineNo">509</span> lock.readLock().lock();<a name="line.509"></a> -<span class="sourceLineNo">510</span> // We can not read here even if backingMap does contain the given key because its offset<a name="line.510"></a> -<span class="sourceLineNo">511</span> // maybe changed. If we lock BlockCacheKey instead of offset, then we can only check<a name="line.511"></a> -<span class="sourceLineNo">512</span> // existence here.<a name="line.512"></a> -<span class="sourceLineNo">513</span> if (bucketEntry.equals(backingMap.get(key))) {<a name="line.513"></a> -<span class="sourceLineNo">514</span> // TODO : change this area - should be removed after server cells and<a name="line.514"></a> -<span class="sourceLineNo">515</span> // 12295 are available<a name="line.515"></a> -<span class="sourceLineNo">516</span> int len = bucketEntry.getLength();<a name="line.516"></a> -<span class="sourceLineNo">517</span> if (LOG.isTraceEnabled()) {<a name="line.517"></a> -<span class="sourceLineNo">518</span> LOG.trace("Read offset=" + bucketEntry.offset() + ", len=" + len);<a name="line.518"></a> +<span class="sourceLineNo">423</span> if (cacheEnabled) {<a name="line.423"></a> +<span class="sourceLineNo">424</span> if (backingMap.containsKey(cacheKey) || ramCache.containsKey(cacheKey)) {<a name="line.424"></a> +<span class="sourceLineNo">425</span> if (BlockCacheUtil.shouldReplaceExistingCacheBlock(this, cacheKey, cachedItem)) {<a name="line.425"></a> +<span class="sourceLineNo">426</span> cacheBlockWithWaitInternal(cacheKey, cachedItem, inMemory, wait);<a name="line.426"></a> +<span class="sourceLineNo">427</span> }<a name="line.427"></a> +<span class="sourceLineNo">428</span> } else {<a name="line.428"></a> +<span class="sourceLineNo">429</span> cacheBlockWithWaitInternal(cacheKey, cachedItem, inMemory, wait);<a name="line.429"></a> +<span class="sourceLineNo">430</span> }<a name="line.430"></a> +<span class="sourceLineNo">431</span> }<a name="line.431"></a> +<span class="sourceLineNo">432</span> }<a name="line.432"></a> +<span class="sourceLineNo">433</span><a name="line.433"></a> +<span class="sourceLineNo">434</span> private void cacheBlockWithWaitInternal(BlockCacheKey cacheKey, Cacheable cachedItem,<a name="line.434"></a> +<span class="sourceLineNo">435</span> boolean inMemory, boolean wait) {<a name="line.435"></a> +<span class="sourceLineNo">436</span> if (!cacheEnabled) {<a name="line.436"></a> +<span class="sourceLineNo">437</span> return;<a name="line.437"></a> +<span class="sourceLineNo">438</span> }<a name="line.438"></a> +<span class="sourceLineNo">439</span> LOG.trace("Caching key={}, item={}", cacheKey, cachedItem);<a name="line.439"></a> +<span class="sourceLineNo">440</span> // Stuff the entry into the RAM cache so it can get drained to the persistent store<a name="line.440"></a> +<span class="sourceLineNo">441</span> RAMQueueEntry re =<a name="line.441"></a> +<span class="sourceLineNo">442</span> new RAMQueueEntry(cacheKey, cachedItem, accessCount.incrementAndGet(), inMemory);<a name="line.442"></a> +<span class="sourceLineNo">443</span> /**<a name="line.443"></a> +<span class="sourceLineNo">444</span> * Don't use ramCache.put(cacheKey, re) here. because there may be a existing entry with same<a name="line.444"></a> +<span class="sourceLineNo">445</span> * key in ramCache, the heap size of bucket cache need to update if replacing entry from<a name="line.445"></a> +<span class="sourceLineNo">446</span> * ramCache. 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name="line.466"></a> +<span class="sourceLineNo">467</span> cacheStats.failInsert();<a name="line.467"></a> +<span class="sourceLineNo">468</span> } else {<a name="line.468"></a> +<span class="sourceLineNo">469</span> this.blockNumber.increment();<a name="line.469"></a> +<span class="sourceLineNo">470</span> this.heapSize.add(cachedItem.heapSize());<a name="line.470"></a> +<span class="sourceLineNo">471</span> blocksByHFile.add(cacheKey);<a name="line.471"></a> +<span class="sourceLineNo">472</span> }<a name="line.472"></a> +<span class="sourceLineNo">473</span> }<a name="line.473"></a> +<span class="sourceLineNo">474</span><a name="line.474"></a> +<span class="sourceLineNo">475</span> /**<a name="line.475"></a> +<span class="sourceLineNo">476</span> * Get the buffer of the block with the specified key.<a name="line.476"></a> +<span class="sourceLineNo">477</span> * @param key block's cache key<a name="line.477"></a> +<span class="sourceLineNo">478</span> * @param caching true if the caller caches blocks on cache misses<a name="line.478"></a> +<span class="sourceLineNo">479</span> * @param repeat Whether this is a repeat lookup for the same block<a name="line.479"></a> +<span class="sourceLineNo">480</span> * @param updateCacheMetrics Whether we should update cache metrics or not<a name="line.480"></a> +<span class="sourceLineNo">481</span> * @return buffer of specified cache key, or null if not in cache<a name="line.481"></a> +<span class="sourceLineNo">482</span> */<a name="line.482"></a> +<span class="sourceLineNo">483</span> @Override<a name="line.483"></a> +<span class="sourceLineNo">484</span> public Cacheable getBlock(BlockCacheKey key, boolean caching, boolean repeat,<a name="line.484"></a> +<span class="sourceLineNo">485</span> boolean updateCacheMetrics) {<a name="line.485"></a> +<span class="sourceLineNo">486</span> if (!cacheEnabled) {<a name="line.486"></a> +<span class="sourceLineNo">487</span> return null;<a name="line.487"></a> +<span class="sourceLineNo">488</span> }<a name="line.488"></a> +<span class="sourceLineNo">489</span> RAMQueueEntry re = ramCache.get(key);<a name="line.489"></a> +<span class="sourceLineNo">490</span> if (re != null) {<a name="line.490"></a> +<span class="sourceLineNo">491</span> if (updateCacheMetrics) {<a name="line.491"></a> +<span class="sourceLineNo">492</span> cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.492"></a> +<span class="sourceLineNo">493</span> }<a name="line.493"></a> +<span class="sourceLineNo">494</span> re.access(accessCount.incrementAndGet());<a name="line.494"></a> +<span class="sourceLineNo">495</span> return re.getData();<a name="line.495"></a> +<span class="sourceLineNo">496</span> }<a name="line.496"></a> +<span class="sourceLineNo">497</span> BucketEntry bucketEntry = backingMap.get(key);<a name="line.497"></a> +<span class="sourceLineNo">498</span> if (bucketEntry != null) {<a name="line.498"></a> +<span class="sourceLineNo">499</span> long start = System.nanoTime();<a name="line.499"></a> +<span class="sourceLineNo">500</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.500"></a> +<span class="sourceLineNo">501</span> try {<a name="line.501"></a> +<span class="sourceLineNo">502</span> lock.readLock().lock();<a name="line.502"></a> +<span class="sourceLineNo">503</span> // We can not read here even if backingMap does contain the given key because its offset<a name="line.503"></a> +<span class="sourceLineNo">504</span> // maybe changed. If we lock BlockCacheKey instead of offset, then we can only check<a name="line.504"></a> +<span class="sourceLineNo">505</span> // existence here.<a name="line.505"></a> +<span class="sourceLineNo">506</span> if (bucketEntry.equals(backingMap.get(key))) {<a name="line.506"></a> +<span class="sourceLineNo">507</span> // TODO : change this area - should be removed after server cells and<a name="line.507"></a> +<span class="sourceLineNo">508</span> // 12295 are available<a name="line.508"></a> +<span class="sourceLineNo">509</span> int len = bucketEntry.getLength();<a name="line.509"></a> +<span class="sourceLineNo">510</span> if (LOG.isTraceEnabled()) {<a name="line.510"></a> +<span class="sourceLineNo">511</span> LOG.trace("Read offset=" + bucketEntry.offset() + ", len=" + len);<a name="line.511"></a> +<span class="sourceLineNo">512</span> }<a name="line.512"></a> +<span class="sourceLineNo">513</span> Cacheable cachedBlock = ioEngine.read(bucketEntry.offset(), len,<a name="line.513"></a> +<span class="sourceLineNo">514</span> bucketEntry.deserializerReference(this.deserialiserMap));<a name="line.514"></a> +<span class="sourceLineNo">515</span> long timeTaken = System.nanoTime() - start;<a name="line.515"></a> +<span class="sourceLineNo">516</span> if (updateCacheMetrics) {<a name="line.516"></a> +<span class="sourceLineNo">517</span> cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.517"></a> +<span class="sourceLineNo">518</span> cacheStats.ioHit(timeTaken);<a name="line.518"></a> <span class="sourceLineNo">519</span> }<a name="line.519"></a> -<span class="sourceLineNo">520</span> Cacheable cachedBlock = ioEngine.read(bucketEntry.offset(), len,<a name="line.520"></a> -<span class="sourceLineNo">521</span> bucketEntry.deserializerReference(this.deserialiserMap));<a name="line.521"></a> -<span class="sourceLineNo">522</span> long timeTaken = System.nanoTime() - start;<a name="line.522"></a> -<span class="sourceLineNo">523</span> if (updateCacheMetrics) {<a name="line.523"></a> -<span class="sourceLineNo">524</span> cacheStats.hit(caching, key.isPrimary(), key.getBlockType());<a name="line.524"></a> -<span class="sourceLineNo">525</span> cacheStats.ioHit(timeTaken);<a name="line.525"></a> +<span class="sourceLineNo">520</span> if (cachedBlock.getMemoryType() == MemoryType.SHARED) {<a name="line.520"></a> +<span class="sourceLineNo">521</span> bucketEntry.incrementRefCountAndGet();<a name="line.521"></a> +<span class="sourceLineNo">522</span> }<a name="line.522"></a> +<span class="sourceLineNo">523</span> bucketEntry.access(accessCount.incrementAndGet());<a name="line.523"></a> +<span class="sourceLineNo">524</span> if (this.ioErrorStartTime > 0) {<a name="line.524"></a> +<span class="sourceLineNo">525</span> ioErrorStartTime = -1;<a name="line.525"></a> <span class="sourceLineNo">526</span> }<a name="line.526"></a> -<span class="sourceLineNo">527</span> if (cachedBlock.getMemoryType() == MemoryType.SHARED) {<a name="line.527"></a> -<span class="sourceLineNo">528</span> bucketEntry.incrementRefCountAndGet();<a name="line.528"></a> -<span class="sourceLineNo">529</span> }<a name="line.529"></a> -<span class="sourceLineNo">530</span> bucketEntry.access(accessCount.incrementAndGet());<a name="line.530"></a> -<span class="sourceLineNo">531</span> if (this.ioErrorStartTime > 0) {<a name="line.531"></a> -<span class="sourceLineNo">532</span> ioErrorStartTime = -1;<a name="line.532"></a> -<span class="sourceLineNo">533</span> }<a name="line.533"></a> -<span class="sourceLineNo">534</span> return cachedBlock;<a name="line.534"></a> -<span class="sourceLineNo">535</span> }<a name="line.535"></a> -<span class="sourceLineNo">536</span> } catch (IOException ioex) {<a name="line.536"></a> -<span class="sourceLineNo">537</span> LOG.error("Failed reading block " + key + " from bucket cache", ioex);<a name="line.537"></a> -<span class="sourceLineNo">538</span> checkIOErrorIsTolerated();<a name="line.538"></a> -<span class="sourceLineNo">539</span> } finally {<a name="line.539"></a> -<span class="sourceLineNo">540</span> lock.readLock().unlock();<a name="line.540"></a> -<span class="sourceLineNo">541</span> }<a name="line.541"></a> -<span class="sourceLineNo">542</span> }<a name="line.542"></a> -<span class="sourceLineNo">543</span> if (!repeat && updateCacheMetrics) {<a name="line.543"></a> -<span class="sourceLineNo">544</span> cacheStats.miss(caching, key.isPrimary(), key.getBlockType());<a name="line.544"></a> -<span class="sourceLineNo">545</span> }<a name="line.545"></a> -<span class="sourceLineNo">546</span> return null;<a name="line.546"></a> -<span class="sourceLineNo">547</span> }<a name="line.547"></a> -<span class="sourceLineNo">548</span><a name="line.548"></a> -<span class="sourceLineNo">549</span> @VisibleForTesting<a name="line.549"></a> -<span class="sourceLineNo">550</span> void blockEvicted(BlockCacheKey cacheKey, BucketEntry bucketEntry, boolean decrementBlockNumber) {<a name="line.550"></a> -<span class="sourceLineNo">551</span> bucketAllocator.freeBlock(bucketEntry.offset());<a name="line.551"></a> -<span class="sourceLineNo">552</span> realCacheSize.add(-1 * bucketEntry.getLength());<a name="line.552"></a> -<span class="sourceLineNo">553</span> blocksByHFile.remove(cacheKey);<a name="line.553"></a> -<span class="sourceLineNo">554</span> if (decrementBlockNumber) {<a name="line.554"></a> -<span class="sourceLineNo">555</span> this.blockNumber.decrement();<a name="line.555"></a> -<span class="sourceLineNo">556</span> }<a name="line.556"></a> -<span class="sourceLineNo">557</span> }<a name="line.557"></a> -<span class="sourceLineNo">558</span><a name="line.558"></a> -<span class="sourceLineNo">559</span> @Override<a name="line.559"></a> -<span class="sourceLineNo">560</span> public boolean evictBlock(BlockCacheKey cacheKey) {<a name="line.560"></a> -<span class="sourceLineNo">561</span> return evictBlock(cacheKey, true);<a name="line.561"></a> -<span class="sourceLineNo">562</span> }<a name="line.562"></a> -<span class="sourceLineNo">563</span><a name="line.563"></a> -<span class="sourceLineNo">564</span> // does not check for the ref count. Just tries to evict it if found in the<a name="line.564"></a> -<span class="sourceLineNo">565</span> // bucket map<a name="line.565"></a> -<span class="sourceLineNo">566</span> private boolean forceEvict(BlockCacheKey cacheKey) {<a name="line.566"></a> -<span class="sourceLineNo">567</span> if (!cacheEnabled) {<a name="line.567"></a> -<span class="sourceLineNo">568</span> return false;<a name="line.568"></a> -<span class="sourceLineNo">569</span> }<a name="line.569"></a> -<span class="sourceLineNo">570</span> RAMQueueEntry removedBlock = checkRamCache(cacheKey);<a name="line.570"></a> -<span class="sourceLineNo">571</span> BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.571"></a> -<span class="sourceLineNo">572</span> if (bucketEntry == null) {<a name="line.572"></a> -<span class="sourceLineNo">573</span> if (removedBlock != null) {<a name="line.573"></a> -<span class="sourceLineNo">574</span> cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.574"></a> -<span class="sourceLineNo">575</span> return true;<a name="line.575"></a> -<span class="sourceLineNo">576</span> } else {<a name="line.576"></a> -<span class="sourceLineNo">577</span> return false;<a name="line.577"></a> -<span class="sourceLineNo">578</span> }<a name="line.578"></a> -<span class="sourceLineNo">579</span> }<a name="line.579"></a> -<span class="sourceLineNo">580</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.580"></a> -<span class="sourceLineNo">581</span> try {<a name="line.581"></a> -<span class="sourceLineNo">582</span> lock.writeLock().lock();<a name="line.582"></a> -<span class="sourceLineNo">583</span> if (backingMap.remove(cacheKey, bucketEntry)) {<a name="line.583"></a> -<span class="sourceLineNo">584</span> blockEvicted(cacheKey, bucketEntry, removedBlock == null);<a name="line.584"></a> -<span class="sourceLineNo">585</span> } else {<a name="line.585"></a> -<span class="sourceLineNo">586</span> return false;<a name="line.586"></a> -<span class="sourceLineNo">587</span> }<a name="line.587"></a> -<span class="sourceLineNo">588</span> } finally {<a name="line.588"></a> -<span class="sourceLineNo">589</span> lock.writeLock().unlock();<a name="line.589"></a> -<span class="sourceLineNo">590</span> }<a name="line.590"></a> -<span class="sourceLineNo">591</span> cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.591"></a> -<span class="sourceLineNo">592</span> return true;<a name="line.592"></a> -<span class="sourceLineNo">593</span> }<a name="line.593"></a> -<span class="sourceLineNo">594</span><a name="line.594"></a> -<span class="sourceLineNo">595</span> private RAMQueueEntry checkRamCache(BlockCacheKey cacheKey) {<a name="line.595"></a> -<span class="sourceLineNo">596</span> RAMQueueEntry removedBlock = ramCache.remove(cacheKey);<a name="line.596"></a> -<span class="sourceLineNo">597</span> if (removedBlock != null) {<a name="line.597"></a> -<span class="sourceLineNo">598</span> this.blockNumber.decrement();<a name="line.598"></a> -<span class="sourceLineNo">599</span> this.heapSize.add(-1 * removedBlock.getData().heapSize());<a name="line.599"></a> +<span class="sourceLineNo">527</span> return cachedBlock;<a name="line.527"></a> +<span class="sourceLineNo">528</span> }<a name="line.528"></a> +<span class="sourceLineNo">529</span> } catch (IOException ioex) {<a name="line.529"></a> +<span class="sourceLineNo">530</span> LOG.error("Failed reading block " + key + " from bucket cache", ioex);<a name="line.530"></a> +<span class="sourceLineNo">531</span> checkIOErrorIsTolerated();<a name="line.531"></a> +<span class="sourceLineNo">532</span> } finally {<a name="line.532"></a> +<span class="sourceLineNo">533</span> lock.readLock().unlock();<a name="line.533"></a> +<span class="sourceLineNo">534</span> }<a name="line.534"></a> +<span class="sourceLineNo">535</span> }<a name="line.535"></a> +<span class="sourceLineNo">536</span> if (!repeat && updateCacheMetrics) {<a name="line.536"></a> +<span class="sourceLineNo">537</span> cacheStats.miss(caching, key.isPrimary(), key.getBlockType());<a name="line.537"></a> +<span class="sourceLineNo">538</span> }<a name="line.538"></a> +<span class="sourceLineNo">539</span> return null;<a name="line.539"></a> +<span class="sourceLineNo">540</span> }<a name="line.540"></a> +<span class="sourceLineNo">541</span><a name="line.541"></a> +<span class="sourceLineNo">542</span> @VisibleForTesting<a name="line.542"></a> +<span class="sourceLineNo">543</span> void blockEvicted(BlockCacheKey cacheKey, BucketEntry bucketEntry, boolean decrementBlockNumber) {<a name="line.543"></a> +<span class="sourceLineNo">544</span> bucketAllocator.freeBlock(bucketEntry.offset());<a name="line.544"></a> +<span class="sourceLineNo">545</span> realCacheSize.add(-1 * bucketEntry.getLength());<a name="line.545"></a> +<span class="sourceLineNo">546</span> blocksByHFile.remove(cacheKey);<a name="line.546"></a> +<span class="sourceLineNo">547</span> if (decrementBlockNumber) {<a name="line.547"></a> +<span class="sourceLineNo">548</span> this.blockNumber.decrement();<a name="line.548"></a> +<span class="sourceLineNo">549</span> }<a name="line.549"></a> +<span class="sourceLineNo">550</span> }<a name="line.550"></a> +<span class="sourceLineNo">551</span><a name="line.551"></a> +<span class="sourceLineNo">552</span> @Override<a name="line.552"></a> +<span class="sourceLineNo">553</span> public boolean evictBlock(BlockCacheKey cacheKey) {<a name="line.553"></a> +<span class="sourceLineNo">554</span> return evictBlock(cacheKey, true);<a name="line.554"></a> +<span class="sourceLineNo">555</span> }<a name="line.555"></a> +<span class="sourceLineNo">556</span><a name="line.556"></a> +<span class="sourceLineNo">557</span> // does not check for the ref count. Just tries to evict it if found in the<a name="line.557"></a> +<span class="sourceLineNo">558</span> // bucket map<a name="line.558"></a> +<span class="sourceLineNo">559</span> private boolean forceEvict(BlockCacheKey cacheKey) {<a name="line.559"></a> +<span class="sourceLineNo">560</span> if (!cacheEnabled) {<a name="line.560"></a> +<span class="sourceLineNo">561</span> return false;<a name="line.561"></a> +<span class="sourceLineNo">562</span> }<a name="line.562"></a> +<span class="sourceLineNo">563</span> RAMQueueEntry removedBlock = checkRamCache(cacheKey);<a name="line.563"></a> +<span class="sourceLineNo">564</span> BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.564"></a> +<span class="sourceLineNo">565</span> if (bucketEntry == null) {<a name="line.565"></a> +<span class="sourceLineNo">566</span> if (removedBlock != null) {<a name="line.566"></a> +<span class="sourceLineNo">567</span> cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.567"></a> +<span class="sourceLineNo">568</span> return true;<a name="line.568"></a> +<span class="sourceLineNo">569</span> } else {<a name="line.569"></a> +<span class="sourceLineNo">570</span> return false;<a name="line.570"></a> +<span class="sourceLineNo">571</span> }<a name="line.571"></a> +<span class="sourceLineNo">572</span> }<a name="line.572"></a> +<span class="sourceLineNo">573</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.573"></a> +<span class="sourceLineNo">574</span> try {<a name="line.574"></a> +<span class="sourceLineNo">575</span> lock.writeLock().lock();<a name="line.575"></a> +<span class="sourceLineNo">576</span> if (backingMap.remove(cacheKey, bucketEntry)) {<a name="line.576"></a> +<span class="sourceLineNo">577</span> blockEvicted(cacheKey, bucketEntry, removedBlock == null);<a name="line.577"></a> +<span class="sourceLineNo">578</span> } else {<a name="line.578"></a> +<span class="sourceLineNo">579</span> return false;<a name="line.579"></a> +<span class="sourceLineNo">580</span> }<a name="line.580"></a> +<span class="sourceLineNo">581</span> } finally {<a name="line.581"></a> +<span class="sourceLineNo">582</span> lock.writeLock().unlock();<a name="line.582"></a> +<span class="sourceLineNo">583</span> }<a name="line.583"></a> +<span class="sourceLineNo">584</span> cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.584"></a> +<span class="sourceLineNo">585</span> return true;<a name="line.585"></a> +<span class="sourceLineNo">586</span> }<a name="line.586"></a> +<span class="sourceLineNo">587</span><a name="line.587"></a> +<span class="sourceLineNo">588</span> private RAMQueueEntry checkRamCache(BlockCacheKey cacheKey) {<a name="line.588"></a> +<span class="sourceLineNo">589</span> RAMQueueEntry removedBlock = ramCache.remove(cacheKey);<a name="line.589"></a> +<span class="sourceLineNo">590</span> if (removedBlock != null) {<a name="line.590"></a> +<span class="sourceLineNo">591</span> this.blockNumber.decrement();<a name="line.591"></a> +<span class="sourceLineNo">592</span> this.heapSize.add(-1 * removedBlock.getData().heapSize());<a name="line.592"></a> +<span class="sourceLineNo">593</span> }<a name="line.593"></a> +<span class="sourceLineNo">594</span> return removedBlock;<a name="line.594"></a> +<span class="sourceLineNo">595</span> }<a name="line.595"></a> +<span class="sourceLineNo">596</span><a name="line.596"></a> +<span class="sourceLineNo">597</span> public boolean evictBlock(BlockCacheKey cacheKey, boolean deletedBlock) {<a name="line.597"></a> +<span class="sourceLineNo">598</span> if (!cacheEnabled) {<a name="line.598"></a> +<span class="sourceLineNo">599</span> return false;<a name="line.599"></a> <span class="sourceLineNo">600</span> }<a name="line.600"></a> -<span class="sourceLineNo">601</span> return removedBlock;<a name="line.601"></a> -<span class="sourceLineNo">602</span> }<a name="line.602"></a> -<span class="sourceLineNo">603</span><a name="line.603"></a> -<span class="sourceLineNo">604</span> public boolean evictBlock(BlockCacheKey cacheKey, boolean deletedBlock) {<a name="line.604"></a> -<span class="sourceLineNo">605</span> if (!cacheEnabled) {<a name="line.605"></a> -<span class="sourceLineNo">606</span> return false;<a name="line.606"></a> -<span class="sourceLineNo">607</span> }<a name="line.607"></a> -<span class="sourceLineNo">608</span> RAMQueueEntry removedBlock = checkRamCache(cacheKey);<a name="line.608"></a> -<span class="sourceLineNo">609</span> BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.609"></a> -<span class="sourceLineNo">610</span> if (bucketEntry == null) {<a name="line.610"></a> -<span class="sourceLineNo">611</span> if (removedBlock != null) {<a name="line.611"></a> -<span class="sourceLineNo">612</span> cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.612"></a> -<span class="sourceLineNo">613</span> return true;<a name="line.613"></a> -<span class="sourceLineNo">614</span> } else {<a name="line.614"></a> -<span class="sourceLineNo">615</span> return false;<a name="line.615"></a> -<span class="sourceLineNo">616</span> }<a name="line.616"></a> -<span class="sourceLineNo">617</span> }<a name="line.617"></a> -<span class="sourceLineNo">618</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.618"></a> -<span class="sourceLineNo">619</span> try {<a name="line.619"></a> -<span class="sourceLineNo">620</span> lock.writeLock().lock();<a name="line.620"></a> -<span class="sourceLineNo">621</span> int refCount = bucketEntry.getRefCount();<a name="line.621"></a> -<span class="sourceLineNo">622</span> if (refCount == 0) {<a name="line.622"></a> -<span class="sourceLineNo">623</span> if (backingMap.remove(cacheKey, bucketEntry)) {<a name="line.623"></a> -<span class="sourceLineNo">624</span> blockEvicted(cacheKey, bucketEntry, removedBlock == null);<a name="line.624"></a> -<span class="sourceLineNo">625</span> } else {<a name="line.625"></a> -<span class="sourceLineNo">626</span> return false;<a name="line.626"></a> -<span class="sourceLineNo">627</span> }<a name="line.627"></a> -<span class="sourceLineNo">628</span> } else {<a name="line.628"></a> -<span class="sourceLineNo">629</span> if(!deletedBlock) {<a name="line.629"></a> -<span class="sourceLineNo">630</span> if (LOG.isDebugEnabled()) {<a name="line.630"></a> -<span class="sourceLineNo">631</span> LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.631"></a> -<span class="sourceLineNo">632</span> + " readers. Can not be freed now");<a name="line.632"></a> +<span class="sourceLineNo">601</span> RAMQueueEntry removedBlock = checkRamCache(cacheKey);<a name="line.601"></a> +<span class="sourceLineNo">602</span> BucketEntry bucketEntry = backingMap.get(cacheKey);<a name="line.602"></a> +<span class="sourceLineNo">603</span> if (bucketEntry == null) {<a name="line.603"></a> +<span class="sourceLineNo">604</span> if (removedBlock != null) {<a name="line.604"></a> +<span class="sourceLineNo">605</span> cacheStats.evicted(0, cacheKey.isPrimary());<a name="line.605"></a> +<span class="sourceLineNo">606</span> return true;<a name="line.606"></a> +<span class="sourceLineNo">607</span> } else {<a name="line.607"></a> +<span class="sourceLineNo">608</span> return false;<a name="line.608"></a> +<span class="sourceLineNo">609</span> }<a name="line.609"></a> +<span class="sourceLineNo">610</span> }<a name="line.610"></a> +<span class="sourceLineNo">611</span> ReentrantReadWriteLock lock = offsetLock.getLock(bucketEntry.offset());<a name="line.611"></a> +<span class="sourceLineNo">612</span> try {<a name="line.612"></a> +<span class="sourceLineNo">613</span> lock.writeLock().lock();<a name="line.613"></a> +<span class="sourceLineNo">614</span> int refCount = bucketEntry.getRefCount();<a name="line.614"></a> +<span class="sourceLineNo">615</span> if (refCount == 0) {<a name="line.615"></a> +<span class="sourceLineNo">616</span> if (backingMap.remove(cacheKey, bucketEntry)) {<a name="line.616"></a> +<span class="sourceLineNo">617</span> blockEvicted(cacheKey, bucketEntry, removedBlock == null);<a name="line.617"></a> +<span class="sourceLineNo">618</span> } else {<a name="line.618"></a> +<span class="sourceLineNo">619</span> return false;<a name="line.619"></a> +<span class="sourceLineNo">620</span> }<a name="line.620"></a> +<span class="sourceLineNo">621</span> } else {<a name="line.621"></a> +<span class="sourceLineNo">622</span> if(!deletedBlock) {<a name="line.622"></a> +<span class="sourceLineNo">623</span> if (LOG.isDebugEnabled()) {<a name="line.623"></a> +<span class="sourceLineNo">624</span> LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.624"></a> +<span class="sourceLineNo">625</span> + " readers. Can not be freed now");<a name="line.625"></a> +<span class="sourceLineNo">626</span> }<a name="line.626"></a> +<span class="sourceLineNo">627</span> return false;<a name="line.627"></a> +<span class="sourceLineNo">628</span> } else {<a name="line.628"></a> +<span class="sourceLineNo">629</span> if (LOG.isDebugEnabled()) {<a name="line.629"></a> +<span class="sourceLineNo">630</span> LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.630"></a> +<span class="sourceLineNo">631</span> + " readers. Can not be freed now. Hence will mark this"<a name="line.631"></a> +<span class="sourceLineNo">632</span> + " for evicting at a later point");<a name="line.632"></a> <span class="sourceLineNo">633</span> }<a name="line.633"></a> -<span class="sourceLineNo">634</span> return false;<a name="line.634"></a> -<span class="sourceLineNo">635</span> } else {<a name="line.635"></a> -<span class="sourceLineNo">636</span> if (LOG.isDebugEnabled()) {<a name="line.636"></a> -<span class="sourceLineNo">637</span> LOG.debug("This block " + cacheKey + " is still referred by " + refCount<a name="line.637"></a> -<span class="sourceLineNo">638</span> + " readers. Can not be freed now. Hence will mark this"<a name="line.638"></a> -<span class="sourceLineNo">639</span> + " for evicting at a later point");<a name="line.639"></a> -<span class="sourceLineNo">640</span> }<a name="line.640"></a> -<span class="sourceLineNo">641</span> bucketEntry.markForEvict();<a name="line.641"></a> -<span class="sourceLineNo">642</span> }<a name="line.642"></a> -<span class="sourceLineNo">643</span> }<a name="line.643"></a> -<span class="sourceLineNo">644</span> } finally {<a name="line.644"></a> -<span class="sourceLineNo">645</span> lock.writeLock().unlock();<a name="line.645"></a> -<span class="sourceLineNo">646</span> }<a name="line.646"></a> -<span class="sourceLineNo">647</span> cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.647"></a> -<span class="sourceLineNo">648</span> return true;<a name="line.648"></a> -<span class="sourceLineNo">649</span> }<a name="line.649"></a> -<span class="sourceLineNo">650</span><a name="line.650"></a> -<span class="sourceLineNo">651</span> /*<a name="line.651"></a> -<span class="sourceLineNo">652</span> * Statistics thread. Periodically output cache statistics to the log.<a name="line.652"></a> -<span class="sourceLineNo">653</span> */<a name="line.653"></a> -<span class="sourceLineNo">654</span> private static class StatisticsThread extends Thread {<a name="line.654"></a> -<span class="sourceLineNo">655</span> private final BucketCache bucketCache;<a name="line.655"></a> -<span class="sourceLineNo">656</span><a name="line.656"></a> -<span class="sourceLineNo">657</span> public StatisticsThread(BucketCache bucketCache) {<a name="line.657"></a> -<span class="sourceLineNo">658</span> super("BucketCacheStatsThread");<a name="line.658"></a> -<span class="sourceLineNo">659</span> setDaemon(true);<a name="line.659"></a> -<span class="sourceLineNo">660</span> this.bucketCache = bucketCache;<a name="line.660"></a> -<span class="sourceLineNo">661</span> }<a name="line.661"></a> -<span class="sourceLineNo">662</span><a name="line.662"></a> -<span class="sourceLineNo">663</span> @Override<a name="line.663"></a> -<span class="sourceLineNo">664</span> public void run() {<a name="line.664"></a> -<span class="sourceLineNo">665</span> bucketCache.logStats();<a name="line.665"></a> -<span class="sourceLineNo">666</span> }<a name="line.666"></a> -<span class="sourceLineNo">667</span> }<a name="line.667"></a> -<span class="sourceLineNo">668</span><a name="line.668"></a> -<span class="sourceLineNo">669</span> public void logStats() {<a name="line.669"></a> -<span class="sourceLineNo">670</span> long totalSize = bucketAllocator.getTotalSize();<a name="line.670"></a> -<span class="sourceLineNo">671</span> long usedSize = bucketAllocator.getUsedSize();<a name="line.671"></a> -<span class="sourceLineNo">672</span> long freeSize = totalSize - usedSize;<a name="line.672"></a> -<span class="sourceLineNo">673</span> long cacheSize = getRealCacheSize();<a name="line.673"></a> -<span class="sourceLineNo">674</span> LOG.info("failedBlockAdditions=" + cacheStats.getFailedInserts() + ", " +<a name="line.674"></a> -<span class="sourceLineNo">675</span> "totalSize=" + StringUtils.byteDesc(totalSize) + ", " +<a name="line.675"></a> -<span class="sourceLineNo">676</span> "freeSize=" + StringUtils.byteDesc(freeSize) + ", " +<a name="line.676"></a> -<span class="sourceLineNo">677</span> "usedSize=" + StringUtils.byteDesc(usedSize) +", " +<a name="line.677"></a> -<span class="sourceLineNo">678</span> "cacheSize=" + StringUtils.byteDesc(cacheSize) +", " +<a name="line.678"></a> -<span class="sourceLineNo">679</span> "accesses=" + cacheStats.getRequestCount() + ", " +<a name="line.679"></a> -<span class="sourceLineNo">680</span> "hits=" + cacheStats.getHitCount() + ", " +<a name="line.680"></a> -<span class="sourceLineNo">681</span> "IOhitsPerSecond=" + cacheStats.getIOHitsPerSecond() + ", " +<a name="line.681"></a> -<span class="sourceLineNo">682</span> "IOTimePerHit=" + String.format("%.2f", cacheStats.getIOTimePerHit())+ ", " +<a name="line.682"></a> -<span class="sourceLineNo">683</span> "hitRatio=" + (cacheStats.getHitCount() == 0 ? "0," :<a name="line.683"></a> -<span class="sourceLineNo">684</span> (StringUtils.formatPercent(cacheStats.getHitRatio(), 2)+ ", ")) +<a name="line.684"></a> -<span class="sourceLineNo">685</span> "cachingAccesses=" + cacheStats.getRequestCachingCount() + ", " +<a name="line.685"></a> -<span class="sourceLineNo">686</span> "cachingHits=" + cacheStats.getHitCachingCount() + ", " +<a name="line.686"></a> -<span class="sourceLineNo">687</span> "cachingHitsRatio=" +(cacheStats.getHitCachingCount() == 0 ? "0," :<a name="line.687"></a> -<span class="sourceLineNo">688</span> (StringUtils.formatPercent(cacheStats.getHitCachingRatio(), 2)+ ", ")) +<a name="line.688"></a> -<span class="sourceLineNo">689</span> "evictions=" + cacheStats.getEvictionCount() + ", " +<a name="line.689"></a> -<span class="sourceLineNo">690</span> "evicted=" + cacheStats.getEvictedCount() + ", " +<a name="line.690"></a> -<span class="sourceLineNo">691</span> "evictedPerRun=" + cacheStats.evictedPerEviction());<a name="line.691"></a> -<span class="sourceLineNo">692</span> cacheStats.reset();<a name="line.692"></a> -<span class="sourceLineNo">693</span> }<a name="line.693"></a> -<span class="sourceLineNo">694</span><a name="line.694"></a> -<span class="sourceLineNo">695</span> public long getRealCacheSize() {<a name="line.695"></a> -<span class="sourceLineNo">696</span> return this.realCacheSize.sum();<a name="line.696"></a> -<span class="sourceLineNo">697</span> }<a name="line.697"></a> -<span class="sourceLineNo">698</span><a name="line.698"></a> -<span class="sourceLineNo">699</span> private long acceptableSize() {<a name="line.699"></a> -<span class="sourceLineNo">700</span> return (long) Math.floor(bucketAllocator.getTotalSize() * acceptableFactor);<a name="line.700"></a> -<span class="sourceLineNo">701</span> }<a name="line.701"></a> -<span class="sourceLineNo">702</span><a name="line.702"></a> -<span class="sourceLineNo">703</span> @VisibleForTesting<a name="line.703"></a> -<span class="sourceLineNo">704</span> long getPartitionSize(float partitionFactor) {<a name="line.704"></a> -<span class="sourceLineNo">705</span> return (long) Math.floor(bucketAllocator.getTotalSize() * partitionFactor * minFactor);<a name="line.705"></a> -<span class="sourceLineNo">706</span> }<a name="line.706"></a> -<span class="sourceLineNo">707</span><a name="line.707"></a> -<span class="sourceLineNo">708</span> /**<a name="line.708"></a> -<span class="sourceLineNo">709</span> * Return the count of bucketSizeinfos still need free space<a name="line.709"></a> -<span class="sourceLineNo">710</span> */<a name="line.710"></a> -<span class="sourceLineNo">711</span> private int bucketSizesAboveThresholdCount(float minFactor) {<a name="line.711"></a> -<span class="sourceLineNo">712</span> BucketAllocator.IndexStatistics[] stats = bucketAllocator.getIndexStatistics();<a name="line.712"></a> -<span class="sourceLineNo">713</span> int fullCount = 0;<a name="line.713"></a> -<span class="sourceLineNo">714</span> for (int i = 0; i < stats.length; i++) {<a name="line.714"></a> -<span class="sourceLineNo">715</span> long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - minFactor));<a name="line.715"></a> -<span class="sourceLineNo">716</span> freeGoal = Math.max(freeGoal, 1);<a name="line.716"></a> -<span class="sourceLineNo">717</span> if (stats[i].freeCount() < freeGoal) {<a name="line.717"></a> -<span class="sourceLineNo">718</span> fullCount++;<a name="line.718"></a> -<span class="sourceLineNo">719</span> }<a name="line.719"></a> -<span class="sourceLineNo">720</span> }<a name="line.720"></a> -<span class="sourceLineNo">721</span> return fullCount;<a name="line.721"></a> -<span class="sourceLineNo">722</span> }<a name="line.722"></a> -<span class="sourceLineNo">723</span><a name="line.723"></a> -<span class="sourceLineNo">724</span> /**<a name="line.724"></a> -<span class="sourceLineNo">725</span> * This method will find the buckets that are minimally occupied<a name="line.725"></a> -<span class="sourceLineNo">726</span> * and are not reference counted and will free them completely<a name="line.726"></a> -<span class="sourceLineNo">727</span> * without any constraint on the access times of the elements,<a name="line.727"></a> -<span class="sourceLineNo">728</span> * and as a process will completely free at most the number of buckets<a name="line.728"></a> -<span class="sourceLineNo">729</span> * passed, sometimes it might not due to changing refCounts<a name="line.729"></a> -<span class="sourceLineNo">730</span> *<a name="line.730"></a> -<span class="sourceLineNo">731</span> * @param completelyFreeBucketsNeeded number of buckets to free<a name="line.731"></a> -<span class="sourceLineNo">732</span> **/<a name="line.732"></a> -<span class="sourceLineNo">733</span> private void freeEntireBuckets(int completelyFreeBucketsNeeded) {<a name="line.733"></a> -<span class="sourceLineNo">734</span> if (completelyFreeBucketsNeeded != 0) {<a name="line.734"></a> -<span class="sourceLineNo">735</span> // First we will build a set where the offsets are reference counted, usually<a name="line.735"></a> -<span class="sourceLineNo">736</span> // this set is small around O(Handler Count) unless something else is wrong<a name="line.736"></a> -<span class="sourceLineNo">737</span> Set<Integer> inUseBuckets = new HashSet<Integer>();<a name="line.737"></a> -<span class="sourceLineNo">738</span> for (BucketEntry entry : backingMap.values()) {<a name="line.738"></a> -<span class="sourceLineNo">739</span> if (entry.getRefCount() != 0) {<a name="line.739"></a> -<span class="sourceLineNo">740</span> inUseBuckets.add(bucketAllocator.getBucketIndex(entry.offset()));<a name="line.740"></a> -<span class="sourceLineNo">741</span> }<a name="line.741"></a> -<span class="sourceLineNo">742</span> }<a name="line.742"></a> -<span class="sourceLineNo">743</span><a name="line.743"></a> -<span class="sourceLineNo">744</span> Set<Integer> candidateBuckets = bucketAllocator.getLeastFilledBuckets(<a name="line.744"></a> -<span class="sourceLineNo">745</span> inUseBuckets, completelyFreeBucketsNeeded);<a name="line.745"></a> -<span class="sourceLineNo">746</span> for (Map.Entry<BlockCacheKey, BucketEntry> entry : backingMap.entrySet()) {<a name="line.746"></a> -<span class="sourceLineNo">747</span> if (candidateBuckets.contains(bucketAllocator<a name="line.747"></a> -<span class="sourceLineNo">748</span> .getBucketIndex(entry.getValue().offset()))) {<a name="line.748"></a> -<span class="sourceLineNo">749</span> evictBlock(entry.getKey(), false);<a name="line.749"></a> -<span class="sourceLineNo">750</span> }<a name="line.750"></a> -<span class="sourceLineNo">751</span> }<a name="line.751"></a> -<span class="sourceLineNo">752</span> }<a name="line.752"></a> -<span class="sourceLineNo">753</span> }<a name="line.753"></a> -<span class="sourceLineNo">754</span><a name="line.754"></a> -<span class="sourceLineNo">755</span> /**<a name="line.755"></a> -<span class="sourceLineNo">756</span> * Free the space if the used size reaches acceptableSize() or one size block<a name="line.756"></a> -<span class="sourceLineNo">757</span> * couldn't be allocated. When freeing the space, we use the LRU algorithm and<a name="line.757"></a> -<span class="sourceLineNo">758</span> * ensure there must be some blocks evicted<a name="line.758"></a> -<span class="sourceLineNo">759</span> * @param why Why we are being called<a name="line.759"></a> -<span class="sourceLineNo">760</span> */<a name="line.760"></a> -<span class="sourceLineNo">761</span> private void freeSpace(final String why) {<a name="line.761"></a> -<span class="sourceLineNo">762</span> // Ensure only one freeSpace progress at a time<a name="line.762"></a> -<span class="sourceLineNo">763</span> if (!freeSpaceLock.tryLock()) {<a name="line.763"></a> -<span class="sourceLineNo">764</span> return;<a name="line.764"></a> -<span class="sourceLineNo">765</span> }<a name="line.765"></a> -<span class="sourceLineNo">766</span> try {<a name="line.766"></a> -<span class="sourceLineNo">767</span> freeInProgress = true;<a name="line.767"></a> -<span class="sourceLineNo">768</span> long bytesToFreeWithoutExtra = 0;<a name="line.768"></a> -<span class="sourceLineNo">769</span> // Calculate free byte for each bucketSizeinfo<a name="line.769"></a> -<span class="sourceLineNo">770</span> StringBuilder msgBuffer = LOG.isDebugEnabled()? new StringBuilder(): null;<a name="line.770"></a> -<span class="sourceLineNo">771</span> BucketAllocator.IndexStatistics[] stats = bucketAllocator.getIndexStatistics();<a name="line.771"></a> -<span class="sourceLineNo">772</span> long[] bytesToFreeForBucket = new long[stats.length];<a name="line.772"></a> -<span class="sourceLineNo">773</span> for (int i = 0; i < stats.length; i++) {<a name="line.773"></a> -<span class="sourceLineNo">774</span> bytesToFreeForBucket[i] = 0;<a name="line.774"></a> -<span class="sourceLineNo">775</span> long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - minFactor));<a name="line.775"></a> -<span class="sourceLineNo">776</span> freeGoal = Math.max(freeGoal, 1);<a name="line.776"></a> -<span class="sourceLineNo">777</span> if (stats[i].freeCount() < freeGoal) {<a name="line.777"></a> -<span class="sourceLineNo">778</span> bytesToFreeForBucket[i] = stats[i].itemSize() * (freeGoal - stats[i].freeCount());<a name="line.778"></a> -<span class="sourceLineNo">779</span> bytesToFreeWithoutExtra += bytesToFreeForBucket[i];<a name="line.779"></a> -<span class="sourceLineNo">780</span> if (msgBuffer != null) {<a name="line.780"></a> -<span class="sourceLineNo">781</span> msgBuffer.append("Free for bucketSize(" + stats[i].itemSize() + ")="<a name="line.781"></a> -<span class="sourceLineNo">782</span> + StringUtils.byteDesc(bytesToFreeForBucket[i]) + ", ");<a name="line.782"></a> -<span class="sourceLineNo">783</span> }<a name="line.783"></a> -<span class="sourceLineNo">784</span> }<a name="line.784"></a> +<span class="sourceLineNo">634</span> bucketEntry.markForEvict();<a name="line.634"></a> +<span class="sourceLineNo">635</span> }<a name="line.635"></a> +<span class="sourceLineNo">636</span> }<a name="line.636"></a> +<span class="sourceLineNo">637</span> } finally {<a name="line.637"></a> +<span class="sourceLineNo">638</span> lock.writeLock().unlock();<a name="line.638"></a> +<span class="sourceLineNo">639</span> }<a name="line.639"></a> +<span class="sourceLineNo">640</span> cacheStats.evicted(bucketEntry.getCachedTime(), cacheKey.isPrimary());<a name="line.640"></a> +<span class="sourceLineNo">641</span> return true;<a name="line.641"></a> +<span class="sourceLineNo">642</span> }<a name="line.642"></a> +<span class="sourceLineNo">643</span><a name="line.643"></a> +<span class="sourceLineNo">644</span> /*<a name="line.644"></a> +<span class="sourceLineNo">645</span> * Statistics thread. Periodically output cache statistics to the log.<a name="line.645"></a> +<span class="sourceLineNo">646</span> */<a name="line.646"></a> +<span class="sourceLineNo">647</span> private static class StatisticsThread extends Thread {<a name="line.647"></a> +<span class="sourceLineNo">648</span> private final BucketCache bucketCache;<a name="line.648"></a> +<span class="sourceLineNo">649</span><a name="line.649"></a> +<span class="sourceLineNo">650</span> public StatisticsThread(BucketCache bucketCache) {<a name="line.650"></a> +<span class="sourceLineNo">651</span> super("BucketCacheStatsThread");<a name="line.651"></a> +<span class="sourceLineNo">652</span> setDaemon(true);<a name="line.652"></a> +<span class="sourceLineNo">653</span> this.bucketCache = bucketCache;<a name="line.653"></a> +<span class="sourceLineNo">654</span> }<a name="line.654"></a> +<span class="sourceLineNo">655</span><a name="line.655"></a> +<span class="sourceLineNo">656</span> @Override<a name="line.656"></a> +<span class="sourceLineNo">657</span> public void run() {<a name="line.657"></a> +<span class="sourceLineNo">658</span> bucketCache.logStats();<a name="line.658"></a> +<span class="sourceLineNo">659</span> }<a name="line.659"></a> +<span class="sourceLineNo">660</span> }<a name="line.660"></a> +<span class="sourceLineNo">661</span><a name="line.661"></a> +<span class="sourceLineNo">662</span> public void logStats() {<a name="line.662"></a> +<span class="sourceLineNo">663</span> long totalSize = bucketAllocator.getTotalSize();<a name="line.663"></a> +<span class="sourceLineNo">664</span> long usedSize = bucketAllocator.getUsedSize();<a name="line.664"></a> +<span class="sourceLineNo">665</span> long freeSize = totalSize - usedSize;<a name="line.665"></a> +<span class="sourceLineNo">666</span> long cacheSize = getRealCacheSize();<a name="line.666"></a> +<span class="sourceLineNo">667</span> LOG.info("failedBlockAdditions=" + cacheStats.getFailedInserts() + ", " +<a name="line.667"></a> +<span class="sourceLineNo">668</span> "totalSize=" + StringUtils.byteDesc(totalSize) + ", " +<a name="line.668"></a> +<span class="sourceLineNo">669</span> "freeSize=" + StringUtils.byteDesc(freeSize) + ", " +<a name="line.669"></a> +<span class="sourceLineNo">670</span> "usedSize=" + StringUtils.byteDesc(usedSize) +", " +<a name="line.670"></a> +<span class="sourceLineNo">671</span> "cacheSize=" + StringUtils.byteDesc(cacheSize) +", " +<a name="line.671"></a> +<span class="sourceLineNo">672</span> "accesses=" + cacheStats.getRequestCount() + ", " +<a name="line.672"></a> +<span class="sourceLineNo">673</span> "hits=" + cacheStats.getHitCount() + ", " +<a name="line.673"></a> +<span class="sourceLineNo">674</span> "IOhitsPerSecond=" + cacheStats.getIOHitsPerSecond() + ", " +<a name="line.674"></a> +<span class="sourceLineNo">675</span> "IOTimePerHit=" + String.format("%.2f", cacheStats.getIOTimePerHit())+ ", " +<a name="line.675"></a> +<span class="sourceLineNo">676</span> "hitRatio=" + (cacheStats.getHitCount() == 0 ? "0," :<a name="line.676"></a> +<span class="sourceLineNo">677</span> (StringUtils.formatPercent(cacheStats.getHitRatio(), 2)+ ", ")) +<a name="line.677"></a> +<span class="sourceLineNo">678</span> "cachingAccesses=" + cacheStats.getRequestCachingCount() + ", " +<a name="line.678"></a> +<span class="sourceLineNo">679</span> "cachingHits=" + cacheStats.getHitCachingCount() + ", " +<a name="line.679"></a> +<span class="sourceLineNo">680</span> "cachingHitsRatio=" +(cacheStats.getHitCachingCount() == 0 ? "0," :<a name="line.680"></a> +<span class="sourceLineNo">681</span> (StringUtils.formatPercent(cacheStats.getHitCachingRatio(), 2)+ ", ")) +<a name="line.681"></a> +<span class="sourceLineNo">682</span> "evictions=" + cacheStats.getEvictionCount() + ", " +<a name="line.682"></a> +<span class="sourceLineNo">683</span> "evicted=" + cacheStats.getEvictedCount() + ", " +<a name="line.683"></a> +<span class="sourceLineNo">684</span> "evictedPerRun=" + cacheStats.evictedPerEviction());<a name="line.684"></a> +<span class="sourceLineNo">685</span> cacheStats.reset();<a name="line.685"></a> +<span class="sourceLineNo">686</span> }<a name="line.686"></a> +<span class="sourceLineNo">687</span><a name="line.687"></a> +<span class="sourceLineNo">688</span> public long getRealCacheSize() {<a name="line.688"></a> +<span class="sourceLineNo">689</span> return this.realCacheSize.sum();<a name="line.689"></a> +<span class="sourceLineNo">690</span> }<a name="line.690"></a> +<span class="sourceLineNo">691</span><a name="line.691"></a> +<span class="sourceLineNo">692</span> private long acceptableSize() {<a name="line.692"></a> +<span class="sourceLineNo">693</span> return (long) Math.floor(bucketAllocator.getTotalSize() * acceptableFactor);<a name="line.693"></a> +<span class="sourceLineNo">694</span> }<a name="line.694"></a> +<span class="sourceLineNo">695</span><a name="line.695"></a> +<span class="sourceLineNo">696</span> @VisibleForTesting<a name="line.696"></a> +<span class="sourceLineNo">697</span> long getPartitionSize(float partitionFactor) {<a name="line.697"></a> +<span class="sourceLineNo">698</span> return (long) Math.floor(bucketAllocator.getTotalSize() * partitionFactor * minFactor);<a name="line.698"></a> +<span class="sourceLineNo">699</span> }<a name="line.699"></a> +<span class="sourceLineNo">700</span><a name="line.700"></a> +<span class="sourceLineNo">701</span> /**<a name="line.701"></a> +<span class="sourceLineNo">702</span> * Return the count of bucketSizeinfos still need free space<a name="line.702"></a> +<span class="sourceLineNo">703</span> */<a name="line.703"></a> +<span class="sourceLineNo">704</span> private int bucketSizesAboveThresholdCount(float minFactor) {<a name="line.704"></a> +<span class="sourceLineNo">705</span> BucketAllocator.IndexStatistics[] stats = bucketAllocator.getIndexStatistics();<a name="line.705"></a> +<span class="sourceLineNo">706</span> int fullCount = 0;<a name="line.706"></a> +<span class="sourceLineNo">707</span> for (int i = 0; i < stats.length; i++) {<a name="line.707"></a> +<span class="sourceLineNo">708</span> long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - minFactor));<a name="line.708"></a> +<span class="sourceLineNo">709</span> freeGoal = Math.max(freeGoal, 1);<a name="line.709"></a> +<span class="sourceLineNo">710</span> if (stats[i].freeCount() < freeGoal) {<a name="line.710"></a> +<span class="sourceLineNo">711</span> fullCount++;<a name="line.711"></a> +<span class="sourceLineNo">712</span> }<a name="line.712"></a> +<span class="sourceLineNo">713</span> }<a name="line.713"></a> +<span class="sourceLineNo">714</span> return fullCount;<a name="line.714"></a> +<span class="sourceLineNo">715</span> }<a name="line.715"></a> +<span class="sourceLineNo">716</span><a name="line.716"></a> +<span class="sourceLineNo">717</span> /**<a name="line.717"></a> +<span class="sourceLineNo">718</span> * This method will find the buckets that are minimally occupied<a name="line.718"></a> +<span class="sourceLineNo">719</span> * and are not reference counted and will free them completely<a name="line.719"></a> +<span class="sourceLineNo">720</span> * without any constraint on the access times of the elements,<a name="line.720"></a> +<span class="sourceLineNo">721</span> * and as a process will completely free at most the number of buckets<a name="line.721"></a> +<span class="sourceLineNo">722</span> * passed, sometimes it might not due to changing refCounts<a name="line.722"></a> +<span class="sourceLineNo">723</span> *<a name="line.723"></a> +<span class="sourceLineNo">724</span> * @param completelyFreeBucketsNeeded number of buckets to free<a name="line.724"></a> +<span class="sourceLineNo">725</span> **/<a name="line.725"></a> +<span class="sourceLineNo">726</span> private void freeEntireBuckets(int completelyFreeBucketsNeeded) {<a name="line.726"></a> +<span class="sourceLineNo">727</span> if (completelyFreeBucketsNeeded != 0) {<a name="line.727"></a> +<span class="sourceLineNo">728</span> // First we will build a set where the offsets are reference counted, usually<a name="line.728"></a> +<span class="sourceLineNo">729</span> // this set is small around O(Handler Count) unless something else is wrong<a name="line.729"></a> +<span class="sourceLineNo">730</span> Set<Integer> inUseBuckets = new HashSet<Integer>();<a name="line.730"></a> +<span class="sourceLineNo">731</span> for (BucketEntry entry : backingMap.values()) {<a name="line.731"></a> +<span class="sourceLineNo">732</span> if (entry.getRefCount() != 0) {<a name="line.732"></a> +<span class="sourceLineNo">733</span> inUseBuckets.add(bucketAllocator.getBucketIndex(entry.offset()));<a name="line.733"></a> +<span class="sourceLineNo">734</span> }<a name="line.734"></a> +<span class="sourceLineNo">735</span> }<a name="line.735"></a> +<span class="sourceLineNo">736</span><a name="line.736"></a> +<span class="sourceLineNo">737</span> Set<Integer> candidateBuckets = bucketAllocator.getLeastFilledBuckets(<a name="line.737"></a> +<span class="sourceLineNo">738</span> inUseBuckets, completelyFreeBucketsNeeded);<a name="line.738"></a> +<span class="sourceLineNo">739</span> for (Map.Entry<BlockCacheKey, BucketEntry> entry : backingMap.entrySet()) {<a name="line.739"></a> +<span class="sourceLineNo">740</span> if (candidateBuckets.contains(bucketAllocator<a name="line.740"></a> +<span class="sourceLineNo">741</span> .getBucketIndex(entry.getValue().offset()))) {<a name="line.741"></a> +<span class="sourceLineNo">742</span> evictBlock(entry.getKey(), false);<a name="line.742"></a> +<span class="sourceLineNo">743</span> }<a name="line.743"></a> +<span class="sourceLineNo">744</span> }<a name="line.744"></a> +<span class="sourceLineNo">745</span> }<a name="line.745"></a> +<span class="sourceLineNo">746</span> }<a name="line.746"></a> +<span class="sourceLineNo">747</span><a name="line.747"></a> +<span class="sourceLineNo">748</span> /**<a name="line.748"></a> +<span class="sourceLineNo">749</span> * Free the space if the used size reaches acceptableSize() or one size block<a name="line.749"></a> +<span class="sourceLineNo">750</span> * couldn't be allocated. 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bytesToFreeWithoutExtra = 0;<a name="line.761"></a> +<span class="sourceLineNo">762</span> // Calculate free byte for each bucketSizeinfo<a name="line.762"></a> +<span class="sourceLineNo">763</span> StringBuilder msgBuffer = LOG.isDebugEnabled()? new StringBuilder(): null;<a name="line.763"></a> +<span class="sourceLineNo">764</span> BucketAllocator.IndexStatistics[] stats = bucketAllocator.getIndexStatistics();<a name="line.764"></a> +<span class="sourceLineNo">765</span> long[] bytesToFreeForBucket = new long[stats.length];<a name="line.765"></a> +<span class="sourceLineNo">766</span> for (int i = 0; i < stats.length; i++) {<a name="line.766"></a> +<span class="sourceLineNo">767</span> bytesToFreeForBucket[i] = 0;<a name="line.767"></a> +<span class="sourceLineNo">768</span> long freeGoal = (long) Math.floor(stats[i].totalCount() * (1 - minFactor));<a name="line.768"></a> +<span class="sourceLineNo">769</span> freeGoal = Math.max(freeGoal, 1);<a name="line.769"></a> +<span class="sourceLineNo">770</span> if (stats[i].freeCount() < freeGoal) {<a name="line.770"></a> +<span class="sourceLineNo">771</span> bytesToFreeForBucket[i] = stats[i].itemSize() * (freeGoal - stats[i].freeCount());<a name="line.771"></a> +<span class="sourceLineNo">772</span> bytesToFreeWithoutExtra += bytesToFreeForBucket[i];<a name="line.772"></a> +<span class="sourceLineNo">773</span> if (msgBuffer != null) {<a name="line.773"></a> +<span class="sourceLineNo">774</span> msgBuffer.append("Free for bucketSize(" + stats[i].itemSize() + ")="<a name="line.774"></a> +<span class="sourceLineNo">775</span> + StringUtils.byteDesc(bytesToFreeForBucket[i]) + ", ");<a name="line.775"></a> +<span class="sourceLineNo">776</span> }<a name="line.776"></a> +<span class="sourceLineNo">777</span> }<a name="line.777"></a> +<span class="sourceLineNo">778</span> }<a name="line.778"></a> +<span class="sourceLineNo">779</span> if (msgBuffer != null) {<a name="line.779"></a> +<span class="sourceLineNo">780</span> msgBuffer.append("Free for total=" + StringUtils.byteDesc(bytesToFreeWithoutExtra) + ", ");<a name="line.780"></a> +<span class="sourceLineNo">781</span> }<a name="line.781"></a> +<span class="sourceLineNo">782</span><a name="line.782"></a> +<span class="sourceLineNo">783</span> if (bytesToFreeWithoutExtra <= 0) {<a name="line.783"></a> +<span class="sourceLineNo">784</span> return;<a name="line.784"></a> <span class="sourceLineNo">785</span> }<a name="line.785"></a> -<span class="sourceLineNo">786</span> if (msgBuffer != null) {<a name="line.786"></a> -<span class="sourceLineNo">787</span> msgBuffer.append("Free for total=" + StringUtils.byteDesc(bytesToFreeWithoutExtra) + ", ");<a name="line.787"></a> -<span class="sourceLineNo">788</span> }<a name="line.788"></a> -<span class="sourceLineNo">789</span><a name="line.789"></a> -<span class="sourceLineNo">790</span> if (bytesToFreeWithoutExtra <= 0) {<a name="line.790"></a> -<span class="sourceLineNo">791</span> return;<a name="line.791"></a> +<span class="sourceLineNo">786</span> long currentSize = bucketAllocator.getUsedSize();<a name="line.786"></a> +<span class="sourceLineNo">787</span> long totalSize = bucketAllocator.getTotalSize();<a name="line.787"></a> +<span class="sourceLineNo">788</span> if (LOG.isDebugEnabled() && msgBuffer != null) {<a name="line.788"></a> +<span class="sourceLineNo">789</span> LOG.debug("Free started because \"" + why + "\"; " + msgBuffer.toString() +<a name="line.789"></a> +<span class="sourceLineNo">790</span> " of current used=" + StringUtils.byteDesc(currentSize) + ", actual cacheSize=" +<a name="line.790"></a> +<span class="sourceLineNo">791</span> StringUtils.byteDesc(realCacheSize.sum()) + ", total=" + StringUtils.byteDesc(totalSize));<a name="line.791"></a> <span class="sourceLineNo">792</span> }<a name="line.792"></a> -<span class="sourceLineNo">793</span> long currentSize = bucketAllocator.getUsedSize();<a name="line.793"></a> -<span class="sourceLineNo">794</span> long totalSize = bucketAllocator.getTotalSize();<a name="line.794"></a> -<span class="sourceLineNo">795</span> if (LOG.isDebugEnabled() && msgBuffer != null) {<a name="line.795"></a> -<span class="sourceLineNo">796</span> LOG.debug("Free started because \"" + why + "\"; " + msgBuffer.toString() +<a name="line.796"></a> -<span class="sourceLineNo">797</span> " of current used=" + StringUtils.byteDesc(currentSize) + ", actual cacheSize=" +<a name="line.797"></a> -<span class="sourceLineNo">798</span> StringUtils.byteDesc(realCacheSize.sum()) + ", total=" + StringUtils.byteDesc(totalSize));<a name="line.798"></a> -<span class="sourceLineNo">799</span> }<a name="line.799"></a> -<span class="sourceLineNo">800</span><a name="line.800"></a> -<span class="sourceLineNo">801</span> long bytesToFreeWithExtra = (long) Math.floor(bytesToFreeWithoutExtra<a name="line.801"></a> -<span class="sourceLineNo">802</span> * (1 + extraFreeFactor));<a name="line.802"></a> -<span class="sourceLineNo">803</span><a name="line.803"></a> -<span class="sourceLineNo">804</span> // Instantiate priority buckets<a name="line.804"></a> -<span class="sourceLineNo">805</span> BucketEntryGroup bucketSingle = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.805"></a> -<span class="sourceLineNo">806</span> blockSize, getPartitionSize(singleFactor));<a name="line.806"></a> -<span class="sourceLineNo">807</span> BucketEntryGroup bucketMulti = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.807"></a> -<span class="sourceLineNo">808</span> blockSize, getPartitionSize(multiFactor));<a name="line.808"></a> -<span class="sourceLineNo">809</span> BucketEntryGroup bucketMemory = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.809"></a> -<span class="sourceLineNo">810</span> blockSize, getPartitionSize(memoryFactor));<a name="line.810"></a> -<span class="sourceLineNo">811</span><a name="line.811"></a> -<span class="sourceLineNo">812</span> // Scan entire map putting bucket entry into appropriate bucket entry<a name="line.812"></a> -<span class="sourceLineNo">813</span> // group<a name="line.813"></a> -<span class="sourceLineNo">814</span> for (Map.Entry<BlockCacheKey, BucketEntry> bucketEntryWithKey : backingMap.entrySet()) {<a name="line.814"></a> -<span class="sourceLineNo">815</span> switch (bucketEntryWithKey.getValue().getPriority()) {<a name="line.815"></a> -<span class="sourceLineNo">816</span> case SINGLE: {<a name="line.816"></a> -<span class="sourceLineNo">817</span> bucketSingle.add(bucketEntryWithKey);<a name="line.817"></a> -<span class="sourceLineNo">818</span> break;<a name="line.818"></a> -<span class="sourceLineNo">819</span> }<a name="line.819"></a> -<span class="sourceLineNo">820</span> case MULTI: {<a name="line.820"></a> -<span class="sourceLineNo">821</span> bucketMulti.add(bucketEntryWithKey);<a name="line.821"></a> -<span class="sourceLineNo">822</span> break;<a name="line.822"></a> -<span class="sourceLineNo">823</span> }<a name="line.823"></a> -<span class="sourceLineNo">824</span> case MEMORY: {<a name="line.824"></a> -<span class="sourceLineNo">825</span> bucketMemory.add(bucketEntryWithKey);<a name="line.825"></a> -<span class="sourceLineNo">826</span> break;<a name="line.826"></a> -<span class="sourceLineNo">827</span> }<a name="line.827"></a> -<span class="sourceLineNo">828</span> }<a name="line.828"></a> -<span class="sourceLineNo">829</span> }<a name="line.829"></a> +<span class="sourceLineNo">793</span><a name="line.793"></a> +<span class="sourceLineNo">794</span> long bytesToFreeWithExtra = (long) Math.floor(bytesToFreeWithoutExtra<a name="line.794"></a> +<span class="sourceLineNo">795</span> * (1 + extraFreeFactor));<a name="line.795"></a> +<span class="sourceLineNo">796</span><a name="line.796"></a> +<span class="sourceLineNo">797</span> // Instantiate priority buckets<a name="line.797"></a> +<span class="sourceLineNo">798</span> BucketEntryGroup bucketSingle = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.798"></a> +<span class="sourceLineNo">799</span> blockSize, getPartitionSize(singleFactor));<a name="line.799"></a> +<span class="sourceLineNo">800</span> BucketEntryGroup bucketMulti = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.800"></a> +<span class="sourceLineNo">801</span> blockSize, getPartitionSize(multiFactor));<a name="line.801"></a> +<span class="sourceLineNo">802</span> BucketEntryGroup bucketMemory = new BucketEntryGroup(bytesToFreeWithExtra,<a name="line.802"></a> +<span class="sourceLineNo">803</span> blockSize, getPartitionSize(memoryFactor));<a name="line.803"></a> +<span class="sourceLineNo">804</span><a name="line.804"></a> +<span class="sourceLineNo">805</span> // Scan entire map putting bucket entry into appropriate bucket entry<a name="line.805"></a> +<span class="sourceLineNo">806</span> // group<a name="line.806"></a> +<span class="sourceLineNo">807</span> for (Map.Entry<BlockCacheKey, BucketEntry> bucketEntryWithKey : backingMap.entrySet()) {<a name="line.807"></a> +<span class="sourceLineNo">808</span> switch (bucketEntryWithKey.getValue().getPriority()) {<a name="line.808"></a> +<span class="sourceLineNo">809</span> case SINGLE: {<a name="line.809"></a> +<span class="sourceLineNo">810</span> bucketSingle.add(bucketEntryWithKey);<a name="line.810"></a> +<span class="sourceLineNo">811</span> break;<a name="line.811"></a> +<span class="sourceLineNo">812</span> }<a name="line.812"></a> +<span class="sourceLineNo">813</span> case MULTI: {<a name="line.813"></a> +<span class="sourceLineNo">814</span> bucketMulti.add(bucketEntryWithKey);<a name="line.814"></a> +<span class="sourceLineNo">815</span> break;<a name="line.815"></a> +<span class="sourceLineNo">816</span> }<a name="line.816"></a> +<span class="sourceLineNo">817</span> case MEMORY: {<a name="line.817"></a> +<span class="sourceLineNo">818</span> bucketMemory.add(bucketEntryWithKey);<a name="line.818"></a> +<span class="sourceLineNo">819</span> break;<a name="line.819"></a> +<span class="sourceLineNo">820</span> }<a name="line.820"></a> +<span class="sourceLineNo">821</span> }<a name="line.821"></a> +<span class="sourceLineNo">822</span> }<a name="line.822"></a> +<span class="sourceLineNo">823</span><a name="line.823"></a> +<span class="sourceLineNo">824</span> PriorityQueue<BucketEntryGroup> bucketQueue = new PriorityQueue<>(3,<a name="line.824"></a> +<span class="sourceLineNo">825</span> Comparator.comparingLong(BucketEntryGroup::overflow));<a name="line.825"></a> +<span class="sourceLineNo">826</span><a name="line.826"></a> +<span class="sourceLineNo">827</span> bucketQueue.add(bucketSingle);<a name="line.827"></a> +<span class="sourceLineNo">828</span> bucketQueue.add(bucketMulti);<a name="line.828"></a> +<span class="sourceLineNo">829</span> bucketQueue.add(bucketMemory);<a name="line.829"></a> <span class="sourceLineNo">830</span><a name="line.830"></a> -<span class="sourceLineNo">831</span> PriorityQueue<BucketEntryGroup> bucketQueue = new PriorityQueue<>(3,<a name="line.831"></a> -<span class="sourceLineNo">832</span> Comparator.comparingLong(BucketEntryGroup::overflow));<a name="line.832"></a> +<span class="sourceLineNo">831</span> int remainingBuckets = 3;<a name="line.831"></a> +<span class="sourceLineNo">832</span> long bytesFreed = 0;<a name="line.832"></a> <span class="sourceLineNo">833</span><a name="line.833"></a> -<span class="sourceLineNo">834</span> bucketQueue.add(bucketSingle);<a name="line.834"></a> -<span class="sourceLineNo">835</span> bucketQueue.add(bucketMulti);<a name="line.835"></a> -<span class="sourceLineNo">836</span> bucketQueue.add(bucketMemory);<a name="line.836"></a> -<span class="sourceLineNo">837</span><a name="line.837"></a> -<span class="sourceLineNo">838</span> int remainingBuckets = 3;<a name="line.838"></a> -<span class="sourceLineNo">839</span> long bytesFreed = 0;<a name="line.839"></a> -<span class="sourceLineNo">840</span><a name="line.840"></a> -<span class="sourceLineNo">841</span> BucketEntryGroup bucketGroup;<a name="line.841"></a> -<span class="sourceLineNo">842</span> while ((bucketGroup = bucketQueue.poll()) != null) {<a name="line.842"></a> -<span class="sourceLineNo">843</span> long overflow = bucketGroup.overflow();<a name="line.843"></a> -<span class="sourceLineNo">844</span> if (overflow > 0) {<a name="line.844"></a> -<span class="sourceLineNo">845</span> long bucketBytesToFree = Math.min(overflow,<a name="line.845"></a> -<span class="sourceLineNo">846</span> (bytesToFreeWithoutExtra - bytesFreed) / remainingBuckets);<a name="line.846"></a> -<span class="sourceLineNo">847</span> bytesFreed += bucketGroup.free(bucketBytesToFree);<a name="line.847"></a> -<span class="sourceLineNo">848</span> }<a name="line.848"></a> -<span class="sourceLineNo">849</span> remainingBuckets--;<a name="line.849"></a> -<span class="sourceLineNo">850</span> }<a name="line.850"></a> -<span class="sourceLineNo">851</span><a name="line.851"></a> -<span class="sourceLineNo">852</span> // Check and free if there are buckets that still need freeing of space<a name="line.852"></a> -<span class="sourceLineNo">853</span> if (bucketSizesAboveThresholdCount(minFactor) > 0) {<a name="line.853"></a> -<span class="sourceLineNo">854</span> bucketQueue.clear();<a name="line.854"></a> -<span class="sourceLineNo">855</span> remainingBuckets = 3;<a name="line.855"></a> -<span class="sourceLineNo">856</span><a name="line.856"></a> -<span class="sourceLineNo">857</span> bucketQueue.add(bucketSingle);<a name="line.857"></a> -<span class="sourceLineNo">858</span> bucketQueue.add(bucketMulti);<a name="line.858"></a> -<span class="sourceLineNo">859</span> bucketQueue.add(bucketMemory);<a name="line.859"></a> +<span class="sourceLineNo">834</span> BucketEntryGroup bucketGroup;<a name="line.834"></a> +<span class="sourceLineNo">835</span> while ((bucketGroup = bucketQueue.poll()) != null) {<a name="line.835"></a> +<span class="sourceLineNo">836</span> long overflow = bucketGroup.overflow();<a name="line.836"></a> +<span class="sourceLineNo">837</span> if (overflow > 0) {<a name="line.837"></a> +<span class="sourceLineNo">838</span> long bucketBytesToFree = Math.min(overflow,<a name="line.838"></a> +<span class="sourceLineNo">839</span> (bytesToFreeWithoutExtra - bytesFreed) / remainingBuckets);<a name="line.839"></a> +<span class="sourceLineNo">840</span> bytesFreed += bucketGroup.free(bucketBytesToFree);<a name="line.840"></a> +<span class="sourceLineNo">841</span> }<a name="line.841"></a> +<span class="sourceLineNo">842</span> remainingBuckets--;<a name="line.842"></a> +<span class="sourceLineNo">843</span> }<a name="line.843"></a> +<span class="sourceLineNo">844</span><a name="line.844"></a> +<span class="sourceLineNo">845</span> // Check and free if there are buckets that still need freeing of space<a name="line.845"></a> +<span class="sourceLineNo">846</span> if (bucketSizesAboveThresholdCount(minFactor) > 0) {<a name="line.846"></a> +<span class="sourceLineNo">847</span> bucketQueue.clear();<a name="line.847"></a> +<span class="sourceLineNo">848</span> remainingBuckets = 3;<a name="line.848"></a> +<span class="sourceLineNo">849</span><a name="line.849"></a> +<span class="sourceLineNo">850</span> bucketQueue.add(bucketSingle);<a name="line.850"></a> +<span class="sourceLineNo">851</span> bucketQueue.add(bucketMulti);<a name="line.851"></a> +<span class="sourceLineNo">852</span> bucketQueue.add(bucketMemory);<a name="line.852"></a> +<span class="sourceLineNo">853</span><a name="line.853"></a> +<span class="sourceLineNo">854</span> while ((bucketGroup = bucketQueue.poll()) != null) {<a name="line.854"></a> +<span class="sourceLineNo">855</span> long bucketBytesToFree = (bytesToFreeWithExtra - bytesFreed) / remainingBuckets;<a name="line.855"></a> +<span class="sourceLineNo">856</span> bytesFreed += bucketGroup.free(bucketBytesToFree);<a name="line.856"></a> +<span class="sourceLineNo">857</span> remainingBuckets--;<a name="line.857"></a> +<span class="sourceLineNo">858</span> }<a name="line.858"></a> +<span class="sourceLineNo">859</span> }<a name="line.859"></a> <span class="sourceLineNo">860</span><a name="line.860"></a> -<span class="sourceLineNo">861</span> while ((bucketGroup = bucketQueue.poll()) != null) {<a name="line.861"></a> -<span class="sourceLineNo">862</span> long bucketBytesToFree = (bytesToFreeWithExtra - bytesFreed) / remainingBuckets;<a name="line.862"></a> -<span class="sourceLineNo">863</span> bytesFreed += bucketGroup.free(bucketBytesToFree);<a name="line.863"></a> -<span class="sourceLineNo">864</span> remainingBuckets--;<a name="line.864"></a> -<span class="sourceLineNo">865</span> }<a name="line.865"></a> -<span class="sourceLineNo">866</span> }<a name="line.866"></a> -<span class="sourceLineNo">867</span><a name="line.867"></a> -<span class="sourceLineNo">868</span> // Even after the above free we might still need freeing because of the<a name="line.868"></a> -<span class="sourceLineNo">869</span> // De-fragmentation of the buckets (also called Slab Calcification problem), i.e<a name="line.869"></a> -<span class="sourceLineNo">870</span> // there might be some buckets where the occupancy is very sparse and thus are not<a name="line.870"></a> -<span class="sourceLineNo">871</span> // yielding the free for the other bucket sizes, the fix for this to evict some<a name="line.871"></a> -<span class="sourceLineNo">872</span> // of the buckets, we do this by evicting the buckets that are least fulled<a name="line.872"></a> -<span class="sourceLineNo">873</span> freeEntireBuckets(DEFAULT_FREE_ENTIRE_BLOCK_FACTOR *<a name="line.873"></a> -<span class="sourceLineNo">874</span> bucketSizesAboveThresholdCount(1.0f));<a name="line.874"></a> -<span class="sourceLineNo">875</span><a name="line.875"></a> -<span class="sourceLineNo">876</span> if (LOG.isDebugEnabled()) {<a name="line.876"></a> -<span class="sourceLineNo">877</span> long single = bucketSingle.totalSize();<a name="line.877"></a> -<span class="sourceLineNo">878</span> long multi = bucketMulti.totalSize();<a name="line.878"></a> -<span class="sourceLineNo">879</span> long memory = bucketMemory.totalSize();<a name="line.879"></a> -<span class="sourceLineNo">880</span> if (LOG.isDebugEnabled()) {<a name="line.880"></a> -<span class="sourceLineNo">881</span> LOG.debug("Bucket <TRUNCATED>