[Patch] ParallelGC: Improve AlwaysPreTouch with multiple threads

amith pawar amith.pawar at gmail.com
Fri Aug 21 11:39:12 UTC 2020


Hi Stefan,

Thanks for replying. First time got rejected and then resent it after
subscribing to the group. Not sure how this happened.

I am attaching again. Please do check.

Thanks,
Amit Pawar

On Fri, Aug 21, 2020 at 1:29 PM <stefan.johansson at oracle.com> wrote:

> Hi Amit,
>
> Your patch did not make it to the list. It might have been stripped. Are
> you subscribed to the list? That might be required to attach patches.
>
> Thanks,
> Stefan
>
> On 2020-08-20 19:33, amith pawar wrote:
> >   Hi,
> >
> > Currently AlwaysPreTouch for ParallelGC is done with a single thread and
> > this attached patch converts it to multithreaded similar to other GCs.
> >
> > All JTREG tests passed without new failures.
> >
> > Time taken for pretouch on EPYC server with 1TB memory and 128 threads
> > Before fix: ~107 s
> > After fix   :  ~14 s
> >
> > Please review this attached patch and give your feedback.
> >
> > Thanks,
> > Amit Pawar
> >
>


-- 
With best regards,
amit pawar


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