On Fri, 2013-11-01 at 18:16 +0800, Yuanhan Liu wrote: > On Fri, Nov 01, 2013 at 09:21:46AM +0100, Ingo Molnar wrote: > > > > * Yuanhan Liu <yuanhan....@linux.intel.com> wrote: > > > > > > Btw., another _really_ interesting comparison would be against > > > > the latest rwsem patches. Mind doing such a comparison? > > > > > > Sure. Where can I get it? Are they on some git tree? > > > > I've Cc:-ed Tim Chen who might be able to point you to the latest > > version. > > > > The last on-lkml submission was in this thread: > > > > Subject: [PATCH v8 0/9] rwsem performance optimizations > > > > Thanks. > > I queued bunchs of tests about one hour ago, and already got some > results(If necessary, I can add more data tomorrow when those tests are > finished):
What kind of system are you using to run these workloads on? > > > v3.12-rc7 fe001e3de090e179f95d > ------------------------ ------------------------ > -9.3% > brickland1/micro/aim7/shared > +4.3% > lkp-ib03/micro/aim7/fork_test > +2.2% lkp-ib03/micro/aim7/shared > -2.6% TOTAL > aim7.2000.jobs-per-min > Sorry if I'm missing something, but could you elaborate more on what these percentages represent? Are they anon vma rwsem + optimistic spinning patches vs anon vma rwlock? Also, I see your running aim7, you might be interested in some of the results I found when trying out Ingo's rwlock conversion patch on a largish 80 core system: https://lkml.org/lkml/2013/9/29/280 Thanks, Davidlohr -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
