Messages in this thread | | | Date | Thu, 31 Jul 2014 18:16:26 +0200 | From | Jirka Hladky <> | Subject | Re: [LKP] [sched/numa] a43455a1d57: +94.1% proc-vmstat.numa_hint_faults_local |
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On 07/31/2014 05:57 PM, Peter Zijlstra wrote: > On Thu, Jul 31, 2014 at 12:42:41PM +0200, Peter Zijlstra wrote: >> On Tue, Jul 29, 2014 at 02:39:40AM -0400, Rik van Riel wrote: >>> On Tue, 29 Jul 2014 13:24:05 +0800 >>> Aaron Lu <aaron.lu@intel.com> wrote: >>> >>>> FYI, we noticed the below changes on >>>> >>>> git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master >>>> commit a43455a1d572daf7b730fe12eb747d1e17411365 ("sched/numa: Ensure task_numa_migrate() checks the preferred node") >>>> >>>> ebe06187bf2aec1 a43455a1d572daf7b730fe12e >>>> --------------- ------------------------- >>>> 94500 ~ 3% +115.6% 203711 ~ 6% ivb42/hackbench/50%-threads-pipe >>>> 67745 ~ 4% +64.1% 111174 ~ 5% lkp-snb01/hackbench/50%-threads-socket >>>> 162245 ~ 3% +94.1% 314885 ~ 6% TOTAL proc-vmstat.numa_hint_faults_local >>> Hi Aaron, >>> >>> Jirka Hladky has reported a regression with that changeset as >>> well, and I have already spent some time debugging the issue. >> Let me see if I can still find my SPECjbb2005 copy to see what that >> does. > Jirka, what kind of setup were you seeing SPECjbb regressions? > > I'm not seeing any on 2 sockets with a single SPECjbb instance, I'll go > check one instance per socket now. > > Peter, I'm seeing regressions for
SINGLE SPECjbb instance for number of warehouses being the same as total number of cores in the box.
Example: 4 NUMA node box, each CPU has 6 cores => biggest regression is for 24 warehouses.
See the attached snapshot.
Jirka [unhandled content-type:image/png] | |