Re: [RFC PATCH] qspinlock: Improve performance by reducing load instruction rollback

From	Ling Ma <ling.ma.program@gmail.com>
Newsgroups	linux.kernel
Subject	Re: [RFC PATCH] qspinlock: Improve performance by reducing load instruction rollback
Date	2015-10-21 07:30 +0200
Message-ID	<qlU8i-1IS-3@gated-at.bofh.it> (permalink)
References	<ql8n0-7wA-19@gated-at.bofh.it> <qldwm-6s2-13@gated-at.bofh.it> <qlvjz-7ng-7@gated-at.bofh.it> <qlAMj-6Wk-35@gated-at.bofh.it>
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Ok, we will put the spinlock test into the perf bench.

Thanks
Ling

2015-10-20 16:48 GMT+08:00 Ingo Molnar <mingo@kernel.org>:
>
> * Ling Ma <ling.ma.program@gmail.com> wrote:
>
>> > So it would be nice to create a new user-space spinlock testing facility, via
>> > a new 'perf bench spinlock' feature or so. That way others can test and
>> > validate your results on different hardware as well.
>>
>> Attached the spinlock test module . Queued spinlock will run very slowly in user
>> space because process switch context, it is OK for spinlock-test implementation
>> with kernel module ?
>
> Not sure what you mean by 'because process switch context': if you pin the test
> tasks to individual CPUs and make sure there's nothing else running it should be
> equivalent to kernel-space execution.
>
> Thanks,
>
>         Ingo
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Thread

[RFC PATCH] qspinlock: Improve performance by reducing load instruction rollback ling.ma.program@gmail.com - 2015-10-19 04:30 +0200
  Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Ingo Molnar <mingo@kernel.org> - 2015-10-19 10:00 +0200
    Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Peter Zijlstra <peterz@infradead.org> - 2015-10-19 11:40 +0200
      Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Ingo Molnar <mingo@kernel.org> - 2015-10-19 13:30 +0200
        Re: [RFC PATCH] qspinlock: Improve performance by reducing load instruction  rollback Waiman Long <waiman.long@hpe.com> - 2015-10-19 19:30 +0200
    Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Ling Ma <ling.ma.program@gmail.com> - 2015-10-20 05:00 +0200
      Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Ingo Molnar <mingo@kernel.org> - 2015-10-20 10:50 +0200
        Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Ling Ma <ling.ma.program@gmail.com> - 2015-10-21 07:30 +0200
      Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Peter Zijlstra <peterz@infradead.org> - 2015-10-20 11:20 +0200
  Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Peter Zijlstra <peterz@infradead.org> - 2015-10-19 11:40 +0200
    Re: [RFC PATCH] qspinlock: Improve performance by reducing load instruction  rollback Waiman Long <waiman.long@hpe.com> - 2015-10-19 19:30 +0200
    Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Ling Ma <ling.ma.program@gmail.com> - 2015-10-20 05:10 +0200
  Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Peter Zijlstra <peterz@infradead.org> - 2015-10-19 11:50 +0200
    Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Ling Ma <ling.ma.program@gmail.com> - 2015-10-20 05:10 +0200
    Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Ling Ma <ling.ma.program@gmail.com> - 2015-10-20 05:30 +0200
      Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Peter Zijlstra <peterz@infradead.org> - 2015-10-20 11:20 +0200
        Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Ling Ma <ling.ma.program@gmail.com> - 2015-10-21 07:40 +0200
  Re: [RFC PATCH] qspinlock: Improve performance by reducing load instruction  rollback Waiman Long <waiman.long@hpe.com> - 2015-10-19 19:20 +0200
    Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Ling Ma <ling.ma.program@gmail.com> - 2015-10-20 05:20 +0200
      Re: [RFC PATCH] qspinlock: Improve performance by reducing load instruction  rollback Waiman Long <waiman.long@hpe.com> - 2015-10-20 21:00 +0200
        Re: [RFC PATCH] qspinlock: Improve performance by reducing load  instruction rollback Ling Ma <ling.ma.program@gmail.com> - 2015-10-21 07:50 +0200

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