From: Pawan Gupta <pawan.kumar.gupta@linux.intel.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Aubrey Li <aubrey.intel@gmail.com>,
Mel Gorman <mgorman@techsingularity.net>,
Ingo Molnar <mingo@kernel.org>,
Thomas Gleixner <tglx@linutronix.de>,
Paul Turner <pjt@google.com>,
Tim Chen <tim.c.chen@linux.intel.com>,
Linux List Kernel Mailing <linux-kernel@vger.kernel.org>,
Linus Torvalds <torvalds@linux-foundation.org>,
Fr?d?ric Weisbecker <fweisbec@gmail.com>,
Kees Cook <keescook@chromium.org>, Greg Kerr <kerrnel@google.com>,
Subhra Mazumdar <subhra.mazumdar@oracle.com>
Subject: Re: [RFC][PATCH 00/16] sched: Core scheduling
Date: Tue, 12 Mar 2019 12:07:31 -0700 [thread overview]
Message-ID: <2f67558f-2720-9ef6-7d69-5436e0da6537@linux.intel.com> (raw)
In-Reply-To: <19d5d492-a4c1-b3c8-cae4-da2fdfcb872b@oracle.com>
Hi,
With core scheduling LTP reports 2 new failures related to cgroups(memcg_stat_rss and memcg_move_charge_at_immigrate). I will try to debug it.
Also "perf sched map" indicates there might be a small window when 2 processes in different cgroups run together on one core.
In below case B0 and D0(stress-ng-cpu and sysbench) belong to 2 different cgroups with cpu.tag enabled.
$ perf sched map
*A0 382.266600 secs A0 => kworker/0:1-eve:51
*B0 382.266612 secs B0 => stress-ng-cpu:7956
*A0 382.394597 secs
*B0 382.394609 secs
B0 *C0 382.494459 secs C0 => i915/signal:0:450
B0 *D0 382.494468 secs D0 => sysbench:8088
*. D0 382.494472 secs . => swapper:0
. *C0 383.095787 secs
*B0 C0 383.095792 secs
B0 *D0 383.095820 secs
*A0 D0 383.096587 secs
In some cases I dont see an IPI getting sent to sibling cpu when 2 incompatible processes are picked. Like is below logs at timestamp 382.146250
"stress-ng-cpu" is picked when "sysbench" is running on the sibling cpu.
kworker/0:1-51 [000] d... 382.146246: __schedule: cpu(0): selected: stress-ng-cpu/7956 ffff9945bad29200
kworker/0:1-51 [000] d... 382.146246: __schedule: max: stress-ng-cpu/7956 ffff9945bad29200
kworker/0:1-51 [000] d... 382.146247: __prio_less: (swapper/4/0;140,0,0) ?< (sysbench/8088;140,34783671987,0)
kworker/0:1-51 [000] d... 382.146248: __prio_less: (stress-ng-cpu/7956;119,34817170203,0) ?< (sysbench/8088;119,34783671987,0)
kworker/0:1-51 [000] d... 382.146249: __schedule: cpu(4): selected: sysbench/8088 ffff9945a7405200
kworker/0:1-51 [000] d... 382.146249: __prio_less: (stress-ng-cpu/7956;119,34817170203,0) ?< (sysbench/8088;119,34783671987,0)
kworker/0:1-51 [000] d... 382.146250: __schedule: picked: stress-ng-cpu/7956 ffff9945bad29200
kworker/0:1-51 [000] d... 382.146251: __switch_to: Pawan: cpu(0) switching to stress-ng-cpu
kworker/0:1-51 [000] d... 382.146251: __switch_to: Pawan: cpu(4) running sysbench
stress-ng-cpu-7956 [000] dN.. 382.274234: __schedule: cpu(0): selected: kworker/0:1/51 0
stress-ng-cpu-7956 [000] dN.. 382.274235: __schedule: max: kworker/0:1/51 0
stress-ng-cpu-7956 [000] dN.. 382.274235: __schedule: cpu(4): selected: sysbench/8088 ffff9945a7405200
stress-ng-cpu-7956 [000] dN.. 382.274237: __prio_less: (kworker/0:1/51;119,50744489595,0) ?< (sysbench/8088;119,34911643157,0)
stress-ng-cpu-7956 [000] dN.. 382.274237: __schedule: picked: kworker/0:1/51 0
stress-ng-cpu-7956 [000] d... 382.274239: __switch_to: Pawan: cpu(0) switching to kworker/0:1
stress-ng-cpu-7956 [000] d... 382.274239: __switch_to: Pawan: cpu(4) running sysbench
-Pawan
next prev parent reply other threads:[~2019-03-12 19:08 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-18 16:56 [RFC][PATCH 00/16] sched: Core scheduling Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 01/16] stop_machine: Fix stop_cpus_in_progress ordering Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 02/16] sched: Fix kerneldoc comment for ia64_set_curr_task Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 03/16] sched: Wrap rq::lock access Peter Zijlstra
2019-02-19 16:13 ` Phil Auld
2019-02-19 16:22 ` Peter Zijlstra
2019-02-19 16:37 ` Phil Auld
2019-03-18 15:41 ` Julien Desfossez
2019-03-20 2:29 ` Subhra Mazumdar
2019-03-21 21:20 ` Julien Desfossez
2019-03-22 13:34 ` Peter Zijlstra
2019-03-22 20:59 ` Julien Desfossez
2019-03-23 0:06 ` Subhra Mazumdar
2019-03-27 1:02 ` Subhra Mazumdar
2019-03-29 13:35 ` Julien Desfossez
2019-03-29 22:23 ` Subhra Mazumdar
2019-04-01 21:35 ` Subhra Mazumdar
2019-04-03 20:16 ` Julien Desfossez
2019-04-05 1:30 ` Subhra Mazumdar
2019-04-02 7:42 ` Peter Zijlstra
2019-03-22 23:28 ` Tim Chen
2019-03-22 23:44 ` Tim Chen
2019-02-18 16:56 ` [RFC][PATCH 04/16] sched/{rt,deadline}: Fix set_next_task vs pick_next_task Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 05/16] sched: Add task_struct pointer to sched_class::set_curr_task Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 06/16] sched/fair: Export newidle_balance() Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 07/16] sched: Allow put_prev_task() to drop rq->lock Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 08/16] sched: Rework pick_next_task() slow-path Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 09/16] sched: Introduce sched_class::pick_task() Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 10/16] sched: Core-wide rq->lock Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 11/16] sched: Basic tracking of matching tasks Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 12/16] sched: A quick and dirty cgroup tagging interface Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 13/16] sched: Add core wide task selection and scheduling Peter Zijlstra
[not found] ` <20190402064612.GA46500@aaronlu>
2019-04-02 8:28 ` Peter Zijlstra
2019-04-02 13:20 ` Aaron Lu
2019-04-05 14:55 ` Aaron Lu
2019-04-09 18:09 ` Tim Chen
2019-04-10 4:36 ` Aaron Lu
2019-04-10 14:18 ` Aubrey Li
2019-04-11 2:11 ` Aaron Lu
2019-04-10 14:44 ` Peter Zijlstra
2019-04-11 3:05 ` Aaron Lu
2019-04-11 9:19 ` Peter Zijlstra
2019-04-10 8:06 ` Peter Zijlstra
2019-04-10 19:58 ` Vineeth Remanan Pillai
2019-04-15 16:59 ` Julien Desfossez
2019-04-16 13:43 ` Aaron Lu
2019-04-09 18:38 ` Julien Desfossez
2019-04-10 15:01 ` Peter Zijlstra
2019-04-11 0:11 ` Subhra Mazumdar
2019-04-19 8:40 ` Ingo Molnar
2019-04-19 23:16 ` Subhra Mazumdar
2019-02-18 16:56 ` [RFC][PATCH 14/16] sched/fair: Add a few assertions Peter Zijlstra
2019-02-18 16:56 ` [RFC][PATCH 15/16] sched: Trivial forced-newidle balancer Peter Zijlstra
2019-02-21 16:19 ` Valentin Schneider
2019-02-21 16:41 ` Peter Zijlstra
2019-02-21 16:47 ` Peter Zijlstra
2019-02-21 18:28 ` Valentin Schneider
2019-04-04 8:31 ` Aubrey Li
2019-04-06 1:36 ` Aubrey Li
2019-02-18 16:56 ` [RFC][PATCH 16/16] sched: Debug bits Peter Zijlstra
2019-02-18 17:49 ` [RFC][PATCH 00/16] sched: Core scheduling Linus Torvalds
2019-02-18 20:40 ` Peter Zijlstra
2019-02-19 0:29 ` Linus Torvalds
2019-02-19 15:15 ` Ingo Molnar
2019-02-22 12:17 ` Paolo Bonzini
2019-02-22 14:20 ` Peter Zijlstra
2019-02-22 19:26 ` Tim Chen
2019-02-26 8:26 ` Aubrey Li
2019-02-27 7:54 ` Aubrey Li
2019-02-21 2:53 ` Subhra Mazumdar
2019-02-21 14:03 ` Peter Zijlstra
2019-02-21 18:44 ` Subhra Mazumdar
2019-02-22 0:34 ` Subhra Mazumdar
2019-02-22 12:45 ` Mel Gorman
2019-02-22 16:10 ` Mel Gorman
2019-03-08 19:44 ` Subhra Mazumdar
2019-03-11 4:23 ` Aubrey Li
2019-03-11 18:34 ` Subhra Mazumdar
2019-03-11 23:33 ` Subhra Mazumdar
2019-03-12 0:20 ` Greg Kerr
2019-03-12 0:47 ` Subhra Mazumdar
2019-03-12 7:33 ` Aaron Lu
2019-03-12 7:45 ` Aubrey Li
2019-03-13 5:55 ` Aubrey Li
2019-03-14 0:35 ` Tim Chen
2019-03-14 5:30 ` Aubrey Li
2019-03-14 6:07 ` Li, Aubrey
2019-03-18 6:56 ` Aubrey Li
2019-03-12 19:07 ` Pawan Gupta [this message]
2019-03-26 7:32 ` Aaron Lu
2019-03-26 7:56 ` Aaron Lu
2019-02-19 22:07 ` Greg Kerr
2019-02-20 9:42 ` Peter Zijlstra
2019-02-20 18:33 ` Greg Kerr
2019-02-22 14:10 ` Peter Zijlstra
2019-03-07 22:06 ` Paolo Bonzini
2019-02-20 18:43 ` Subhra Mazumdar
2019-03-01 2:54 ` Subhra Mazumdar
2019-03-14 15:28 ` Julien Desfossez
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=2f67558f-2720-9ef6-7d69-5436e0da6537@linux.intel.com \
--to=pawan.kumar.gupta@linux.intel.com \
--cc=aubrey.intel@gmail.com \
--cc=fweisbec@gmail.com \
--cc=keescook@chromium.org \
--cc=kerrnel@google.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mgorman@techsingularity.net \
--cc=mingo@kernel.org \
--cc=peterz@infradead.org \
--cc=pjt@google.com \
--cc=subhra.mazumdar@oracle.com \
--cc=tglx@linutronix.de \
--cc=tim.c.chen@linux.intel.com \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).