On Mon, 2013-11-04 at 17:44 -0800, Tim Chen wrote: > On Mon, 2013-11-04 at 11:59 +0800, Yuanhan Liu wrote: > > On Fri, Nov 01, 2013 at 08:15:13PM -0700, Davidlohr Bueso wrote: > > > 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? > > > > I queued jobs on 5 testboxes: > > - brickland1: 120 core Ivybridge server > > - lkp-ib03: 48 core Ivybridge server > > - lkp-sb03: 32 core Sandybridge server > > - lkp-nex04: 64 core NHM server > > - lkp-a04: Atom server > > > > > > > > > > > > > > > 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? > > > > v3.12-rc7 fe001e3de090e179f95d > > ------------------------ ------------------------ > > -9.3% > > brickland1/micro/aim7/shared > > .... > > .... > > -2.6% TOTAL > > aim7.2000.jobs-per-min > > > > The comparation base is v3.12-rc7, and we got 9.3 performance regression > > at commit fe001e3de090e179f95d, which is the head of rwsem performance > > optimizations patch set. > > Yunahan, thanks for the data. This I assume is with the entire rwsem > v8 patchset. Any idea of the run variation on the workload?
Yunhan, I haven't got a chance to make multiple runs to check the standard deviation. From the few runs I did, I got a 5.1% increase in performance for aim7 shared workload for the complete rwsem patchset on a similar machine that you are using. The patches are applied to the 3.12-rc7 and compared to the vanilla kernel. Thanks. Tim -- 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/
