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Hudson commented on HADOOP-11660: --------------------------------- FAILURE: Integrated in Hadoop-Yarn-trunk-Java8 #149 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk-Java8/149/]) HADOOP-11660. Add support for hardware crc of HDFS checksums on ARM aarch64 architecture (Edward Nevill via Colin P. McCabe) (cmccabe: rev d9ac5ee2c4dcd4a108ca892af501618caaea450c) * hadoop-common-project/hadoop-common/CHANGES.txt * hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/util/bulk_crc32.c * hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/util/bulk_crc32_aarch64.c * hadoop-common-project/hadoop-common/src/CMakeLists.txt * hadoop-common-project/hadoop-common/src/test/java/org/apache/hadoop/util/TestNativeCrc32.java * hadoop-common-project/hadoop-common/src/main/native/src/test/org/apache/hadoop/util/test_bulk_crc32.c * hadoop-common-project/hadoop-common/src/main/native/src/org/apache/hadoop/util/bulk_crc32_x86.c > Add support for hardware crc of HDFS checksums on ARM aarch64 architecture > -------------------------------------------------------------------------- > > Key: HADOOP-11660 > URL: https://issues.apache.org/jira/browse/HADOOP-11660 > Project: Hadoop Common > Issue Type: Improvement > Components: native > Affects Versions: 2.8.0 > Environment: ARM aarch64 development platform > Reporter: Edward Nevill > Assignee: Edward Nevill > Priority: Minor > Labels: performance > Fix For: 2.8.0 > > Attachments: jira-11660.patch > > Original Estimate: 48h > Remaining Estimate: 48h > > This patch adds support for hardware crc for ARM's new 64 bit architecture > The patch is completely conditionalized on __aarch64__ > I have only added support for the non pipelined version as I benchmarked the > pipelined version on aarch64 and it showed no performance improvement. > The aarch64 version supports both Castagnoli and Zlib CRCs as both of these > are supported on ARM aarch64 hardwre. > To benchmark this I modified the test_bulk_crc32 test to print out the time > taken to CRC a 1MB dataset 1000 times. > Before: > CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 2.55 > CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 2.55 > After: > CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 0.57 > CRC 1048576 bytes @ 512 bytes per checksum X 1000 iterations = 0.57 > So this represents a 5X performance improvement on raw CRC calculation. -- This message was sent by Atlassian JIRA (v6.3.4#6332)