linux os processor optimizations for OpenJDK performance enhancement
ramkri123 at gmail.com
Thu Apr 13 01:30:55 UTC 2017
Many thanks David for the immediate reply.
On Wed, Apr 12, 2017 at 6:26 PM, David Holmes <david.holmes at oracle.com>
> Redirecting to hotspot-dev mailing list, please drop jdk10-dev on future
> On 13/04/2017 9:39 AM, Ram Krishnan wrote:
>> We are working on linux os processor specific optimizations centered
>> cache partitioning and better processor core thread(s) affinity for
>> GC performance enhancement with the following benefits
>> - throughput increase
>> - minimizing tail latency for latency sensitive applications
>> - superior isolation in a multi-tenant environment
>> We have been looking at the G1GC code/documentation and performed some
>> initial experiments. Based on this, what we understand is that STW events
>> pause all application threads independent of which regions are being
>> impacted by garbage collection. For example, if application thread "x"
>> regions 1, 4, 5 and garbage collection is working on regions 2 and 11,
>> application thread "x" is paused during the STW event.
> A stop-the-world event does stop all application threads (all JavaThreads
> in VM terminology) by using a safepoint.
> I'll let the GC folks comment on the details wrt. G1 region management.
> Your expert opinion on this topic is much appreciated.
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