Re: Scheduler regression from caffcdd8d27ba78730d5540396ce72ad022aff2c

From: Bruno Wolff III
Date: Tue Jul 22 2014 - 21:39:06 EST

On Tue, Jul 22, 2014 at 16:18:55 +0200,
Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:

You can put this on top of them. I hope that this will make the pr_err()
introduced in the robustify patch go away.

I went to 3.16-rc6 and then reapplied three patches from your previous email messages. The dmesg output and the diff from 3.16-rc6 have been added to https://bugzilla.kernel.org/show_bug.cgi?id=80251 .
The dmesg output is at: https://bugzilla.kernel.org/attachment.cgi?id=143961
The combined diff is at: https://bugzilla.kernel.org/attachment.cgi?id=143971

What I think you are probably looking for in the dmesg output:
[ 0.251061] __sdt_alloc: allocated f515b020 with cpus: [ 0.251149] __sdt_alloc: allocated f515b0e0 with cpus: [ 0.251231] __sdt_alloc: allocated f515b120 with cpus: [ 0.251313] __sdt_alloc: allocated f515b160 with cpus: [ 0.251397] __sdt_alloc: allocated f515b1a0 with cpus: [ 0.251479] __sdt_alloc: allocated f515b1e0 with cpus: [ 0.251561] __sdt_alloc: allocated f515b220 with cpus: [ 0.251643] __sdt_alloc: allocated f515b260 with cpus: [ 0.252011] __sdt_alloc: allocated f515b2a0 with cpus: [ 0.252095] __sdt_alloc: allocated f515b2e0 with cpus: [ 0.252184] __sdt_alloc: allocated f515b320 with cpus: [ 0.252266] __sdt_alloc: allocated f515b360 with cpus: [ 0.252355] build_sched_domain: cpu: 0 level: SMT cpu_map: 0-3 tl->mask: 0,2
[ 0.252441] build_sched_domain: cpu: 0 level: MC cpu_map: 0-3 tl->mask: 0,2
[ 0.252526] build_sched_domain: cpu: 0 level: DIE cpu_map: 0-3 tl->mask: 0-3
[ 0.252611] build_sched_domain: cpu: 1 level: SMT cpu_map: 0-3 tl->mask: 1,3
[ 0.252696] build_sched_domain: cpu: 1 level: MC cpu_map: 0-3 tl->mask: 1,3
[ 0.252781] build_sched_domain: cpu: 1 level: DIE cpu_map: 0-3 tl->mask: 0-3
[ 0.252866] build_sched_domain: cpu: 2 level: SMT cpu_map: 0-3 tl->mask: 0,2
[ 0.252951] build_sched_domain: cpu: 2 level: MC cpu_map: 0-3 tl->mask: 0,2
[ 0.253005] build_sched_domain: cpu: 2 level: DIE cpu_map: 0-3 tl->mask: 0-3
[ 0.253091] build_sched_domain: cpu: 3 level: SMT cpu_map: 0-3 tl->mask: 1,3
[ 0.253176] build_sched_domain: cpu: 3 level: MC cpu_map: 0-3 tl->mask: 1,3
[ 0.253261] build_sched_domain: cpu: 3 level: DIE cpu_map: 0-3 tl->mask: 0-3
[ 0.254004] build_sched_groups: got group f515b020 with cpus: [ 0.254088] build_sched_groups: got group f515b120 with cpus: [ 0.254170] build_sched_groups: got group f515b1a0 with cpus: [ 0.254253] build_sched_groups: got group f515b2a0 with cpus: [ 0.254336] build_sched_groups: got group f515b2e0 with cpus: [ 0.254419] build_sched_groups: got group f515b0e0 with cpus: [ 0.254502] build_sched_groups: got group f515b160 with cpus: [ 0.254585] build_sched_groups: got group f515b1e0 with cpus: [ 0.254680] CPU0 attaching sched-domain:
[ 0.254684] domain 0: span 0,2 level SMT
[ 0.254687] groups: 0 (cpu_capacity = 586) 2 (cpu_capacity = 588)
[ 0.254695] domain 1: span 0-3 level DIE
[ 0.254698] groups: 0,2 (cpu_capacity = 1174) 1,3 (cpu_capacity = 1176)
[ 0.254709] CPU1 attaching sched-domain:
[ 0.254711] domain 0: span 1,3 level SMT
[ 0.254714] groups: 1 (cpu_capacity = 588) 3 (cpu_capacity = 588)
[ 0.254721] domain 1: span 0-3 level DIE
[ 0.254724] groups: 1,3 (cpu_capacity = 1176) 0,2 (cpu_capacity = 1174)
[ 0.254733] CPU2 attaching sched-domain:
[ 0.254735] domain 0: span 0,2 level SMT
[ 0.254738] groups: 2 (cpu_capacity = 588) 0 (cpu_capacity = 586)
[ 0.254745] domain 1: span 0-3 level DIE
[ 0.254747] groups: 0,2 (cpu_capacity = 1174) 1,3 (cpu_capacity = 1176)
[ 0.254756] CPU3 attaching sched-domain:
[ 0.254758] domain 0: span 1,3 level SMT
[ 0.254761] groups: 3 (cpu_capacity = 588) 1 (cpu_capacity = 588)
[ 0.254768] domain 1: span 0-3 level DIE
[ 0.254770] groups: 1,3 (cpu_capacity = 1176) 0,2 (cpu_capacity = 1174)
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