On Tue, Aug 22, 2017 at 11:21:31AM +0800, kemi wrote:
>
>
> On 2017???08???15??? 17:58, Mel Gorman wrote:
> > On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
> >> Threshold CPU cyclesThroughput(88 threads)
> >> 32 799 241760478
> >> 64 640
On Tue, Aug 22, 2017 at 11:21:31AM +0800, kemi wrote:
>
>
> On 2017???08???15??? 17:58, Mel Gorman wrote:
> > On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
> >> Threshold CPU cyclesThroughput(88 threads)
> >> 32 799 241760478
> >> 64 640
On 2017年08月15日 17:58, Mel Gorman wrote:
> On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
>> Threshold CPU cyclesThroughput(88 threads)
>> 32 799 241760478
>> 64 640 301628829
>> 125 537 358906028 <==> system by
On 2017年08月15日 17:58, Mel Gorman wrote:
> On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
>> Threshold CPU cyclesThroughput(88 threads)
>> 32 799 241760478
>> 64 640 301628829
>> 125 537 358906028 <==> system by
On 2017年08月16日 00:55, Tim Chen wrote:
> On 08/15/2017 02:58 AM, Mel Gorman wrote:
>> On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
>> I'm fairly sure this pushes the size of that structure into the next
>> cache line which is not welcome.
vm_numa_stat_diff is an always
On 2017年08月16日 00:55, Tim Chen wrote:
> On 08/15/2017 02:58 AM, Mel Gorman wrote:
>> On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
>> I'm fairly sure this pushes the size of that structure into the next
>> cache line which is not welcome.
vm_numa_stat_diff is an always
>>
>> -static inline unsigned long zone_numa_state(struct zone *zone,
>> +static inline unsigned long zone_numa_state_snapshot(struct zone *zone,
>> enum zone_numa_stat_item item)
>> {
>> long x = atomic_long_read(>vm_numa_stat[item]);
>> +int cpu;
>>
>> -static inline unsigned long zone_numa_state(struct zone *zone,
>> +static inline unsigned long zone_numa_state_snapshot(struct zone *zone,
>> enum zone_numa_stat_item item)
>> {
>> long x = atomic_long_read(>vm_numa_stat[item]);
>> +int cpu;
On Tue, Aug 15, 2017 at 10:51:21AM -0700, Tim Chen wrote:
> On 08/15/2017 10:30 AM, Mel Gorman wrote:
> > On Tue, Aug 15, 2017 at 09:55:39AM -0700, Tim Chen wrote:
>
> >>
> >> Doubling the threshold and counter size will help, but not as much
> >> as making them above u8 limit as seen in Kemi's
On Tue, Aug 15, 2017 at 10:51:21AM -0700, Tim Chen wrote:
> On 08/15/2017 10:30 AM, Mel Gorman wrote:
> > On Tue, Aug 15, 2017 at 09:55:39AM -0700, Tim Chen wrote:
>
> >>
> >> Doubling the threshold and counter size will help, but not as much
> >> as making them above u8 limit as seen in Kemi's
On 08/15/2017 10:30 AM, Mel Gorman wrote:
> On Tue, Aug 15, 2017 at 09:55:39AM -0700, Tim Chen wrote:
>>
>> Doubling the threshold and counter size will help, but not as much
>> as making them above u8 limit as seen in Kemi's data:
>>
>> 125 537 358906028 <==> system by
On 08/15/2017 10:30 AM, Mel Gorman wrote:
> On Tue, Aug 15, 2017 at 09:55:39AM -0700, Tim Chen wrote:
>>
>> Doubling the threshold and counter size will help, but not as much
>> as making them above u8 limit as seen in Kemi's data:
>>
>> 125 537 358906028 <==> system by
On Tue, Aug 15, 2017 at 09:55:39AM -0700, Tim Chen wrote:
> On 08/15/2017 02:58 AM, Mel Gorman wrote:
> > On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
> >> Threshold CPU cyclesThroughput(88 threads)
> >> 32 799 241760478
> >> 64 640
On Tue, Aug 15, 2017 at 09:55:39AM -0700, Tim Chen wrote:
> On 08/15/2017 02:58 AM, Mel Gorman wrote:
> > On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
> >> Threshold CPU cyclesThroughput(88 threads)
> >> 32 799 241760478
> >> 64 640
On 08/15/2017 02:58 AM, Mel Gorman wrote:
> On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
>> Threshold CPU cyclesThroughput(88 threads)
>> 32 799 241760478
>> 64 640 301628829
>> 125 537 358906028 <==> system by
On 08/15/2017 02:58 AM, Mel Gorman wrote:
> On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
>> Threshold CPU cyclesThroughput(88 threads)
>> 32 799 241760478
>> 64 640 301628829
>> 125 537 358906028 <==> system by
On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
> Threshold CPU cyclesThroughput(88 threads)
> 32 799 241760478
> 64 640 301628829
> 125 537 358906028 <==> system by default (base)
> 256 468
On Tue, Aug 15, 2017 at 04:45:36PM +0800, Kemi Wang wrote:
> Threshold CPU cyclesThroughput(88 threads)
> 32 799 241760478
> 64 640 301628829
> 125 537 358906028 <==> system by default (base)
> 256 468
There is significant overhead in cache bouncing caused by zone counters
(NUMA associated counters) update in parallel in multi-threaded page
allocation (suggested by Dave Hansen).
This patch updates NUMA counter threshold to a fixed size of 32765, as a
small threshold greatly increases the update
There is significant overhead in cache bouncing caused by zone counters
(NUMA associated counters) update in parallel in multi-threaded page
allocation (suggested by Dave Hansen).
This patch updates NUMA counter threshold to a fixed size of 32765, as a
small threshold greatly increases the update
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