From: Peter Zijlstra <peterz@infradead.org>
To: Mel Gorman <mgorman@techsingularity.net>
Cc: Jirka Hladky <jhladky@redhat.com>, Phil Auld <pauld@redhat.com>,
Ingo Molnar <mingo@kernel.org>,
Vincent Guittot <vincent.guittot@linaro.org>,
Juri Lelli <juri.lelli@redhat.com>,
Dietmar Eggemann <dietmar.eggemann@arm.com>,
Steven Rostedt <rostedt@goodmis.org>,
Ben Segall <bsegall@google.com>,
Valentin Schneider <valentin.schneider@arm.com>,
Hillf Danton <hdanton@sina.com>,
LKML <linux-kernel@vger.kernel.org>,
Douglas Shakshober <dshaks@redhat.com>,
Waiman Long <longman@redhat.com>, Joe Mario <jmario@redhat.com>,
Bill Gray <bgray@redhat.com>
Subject: Re: [PATCH 00/13] Reconcile NUMA balancing decisions with the load balancer v6
Date: Thu, 14 May 2020 17:31:22 +0200 [thread overview]
Message-ID: <20200514153122.GE2978@hirez.programming.kicks-ass.net> (raw)
In-Reply-To: <20200513153023.GF3758@techsingularity.net>
On Wed, May 13, 2020 at 04:30:23PM +0100, Mel Gorman wrote:
> Complete shot in the dark but restore adjust_numa_imbalance() and try
> this
>
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index 1a9983da4408..0b31f4468d5b 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -2393,7 +2393,7 @@ static void ttwu_queue(struct task_struct *p, int cpu, int wake_flags)
> struct rq_flags rf;
>
> #if defined(CONFIG_SMP)
> - if (sched_feat(TTWU_QUEUE) && !cpus_share_cache(smp_processor_id(), cpu)) {
> + if (sched_feat(TTWU_QUEUE)) {
just saying that this has the risk of regressing other workloads, see:
518cd6234178 ("sched: Only queue remote wakeups when crossing cache boundaries")
> sched_clock_cpu(cpu); /* Sync clocks across CPUs */
> ttwu_queue_remote(p, cpu, wake_flags);
> return;
>
> --
> Mel Gorman
> SUSE Labs
next prev parent reply other threads:[~2020-05-14 15:32 UTC|newest]
Thread overview: 83+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-02-24 9:52 [PATCH 00/13] Reconcile NUMA balancing decisions with the load balancer v6 Mel Gorman
2020-02-24 9:52 ` [PATCH 01/13] sched/fair: Allow a per-CPU kthread waking a task to stack on the same CPU, to fix XFS performance regression Mel Gorman
2020-02-24 9:52 ` [PATCH 02/13] sched/numa: Trace when no candidate CPU was found on the preferred node Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] " tip-bot2 for Mel Gorman
2020-02-24 9:52 ` [PATCH 03/13] sched/numa: Distinguish between the different task_numa_migrate failure cases Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] sched/numa: Distinguish between the different task_numa_migrate() " tip-bot2 for Mel Gorman
2020-02-24 9:52 ` [PATCH 04/13] sched/fair: Reorder enqueue/dequeue_task_fair path Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] " tip-bot2 for Vincent Guittot
2020-02-24 9:52 ` [PATCH 05/13] sched/numa: Replace runnable_load_avg by load_avg Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] " tip-bot2 for Vincent Guittot
2020-02-24 9:52 ` [PATCH 06/13] sched/numa: Use similar logic to the load balancer for moving between domains with spare capacity Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] " tip-bot2 for Mel Gorman
2020-02-24 9:52 ` [PATCH 07/13] sched/pelt: Remove unused runnable load average Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] " tip-bot2 for Vincent Guittot
2020-02-24 9:52 ` [PATCH 08/13] sched/pelt: Add a new runnable average signal Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] " tip-bot2 for Vincent Guittot
2020-02-24 16:01 ` Valentin Schneider
2020-02-24 16:34 ` Mel Gorman
2020-02-25 8:23 ` Vincent Guittot
2020-02-24 9:52 ` [PATCH 09/13] sched/fair: Take into account runnable_avg to classify group Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] " tip-bot2 for Vincent Guittot
2020-02-24 9:52 ` [PATCH 10/13] sched/numa: Prefer using an idle cpu as a migration target instead of comparing tasks Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] sched/numa: Prefer using an idle CPU " tip-bot2 for Mel Gorman
2020-02-24 9:52 ` [PATCH 11/13] sched/numa: Find an alternative idle CPU if the CPU is part of an active NUMA balance Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] " tip-bot2 for Mel Gorman
2020-02-24 9:52 ` [PATCH 12/13] sched/numa: Bias swapping tasks based on their preferred node Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] " tip-bot2 for Mel Gorman
2020-02-24 9:52 ` [PATCH 13/13] sched/numa: Stop an exhastive search if a reasonable swap candidate or idle CPU is found Mel Gorman
2020-02-24 15:20 ` [tip: sched/core] " tip-bot2 for Mel Gorman
2020-02-24 15:16 ` [PATCH 00/13] Reconcile NUMA balancing decisions with the load balancer v6 Ingo Molnar
2020-02-25 11:59 ` Mel Gorman
2020-02-25 13:28 ` Vincent Guittot
2020-02-25 14:24 ` Mel Gorman
2020-02-25 14:53 ` Vincent Guittot
2020-02-27 9:09 ` Ingo Molnar
2020-03-09 19:12 ` Phil Auld
2020-03-09 20:36 ` Mel Gorman
2020-03-12 9:54 ` Mel Gorman
2020-03-12 12:17 ` Jirka Hladky
[not found] ` <CAE4VaGA4q4_qfC5qe3zaLRfiJhvMaSb2WADgOcQeTwmPvNat+A@mail.gmail.com>
2020-03-12 15:56 ` Mel Gorman
2020-03-12 17:06 ` Jirka Hladky
[not found] ` <CAE4VaGD8DUEi6JnKd8vrqUL_8HZXnNyHMoK2D+1-F5wo+5Z53Q@mail.gmail.com>
2020-03-12 21:47 ` Mel Gorman
2020-03-12 22:24 ` Jirka Hladky
2020-03-20 15:08 ` Jirka Hladky
[not found] ` <CAE4VaGC09OfU2zXeq2yp_N0zXMbTku5ETz0KEocGi-RSiKXv-w@mail.gmail.com>
2020-03-20 15:22 ` Mel Gorman
2020-03-20 15:33 ` Jirka Hladky
[not found] ` <CAE4VaGBGbTT8dqNyLWAwuiqL8E+3p1_SqP6XTTV71wNZMjc9Zg@mail.gmail.com>
2020-03-20 16:38 ` Mel Gorman
2020-03-20 17:21 ` Jirka Hladky
2020-05-07 15:24 ` Jirka Hladky
2020-05-07 15:54 ` Mel Gorman
2020-05-07 16:29 ` Jirka Hladky
2020-05-07 17:49 ` Phil Auld
[not found] ` <20200508034741.13036-1-hdanton@sina.com>
2020-05-18 14:52 ` Jirka Hladky
[not found] ` <20200519043154.10876-1-hdanton@sina.com>
2020-05-20 13:58 ` Jirka Hladky
2020-05-20 16:01 ` Jirka Hladky
2020-05-21 11:06 ` Mel Gorman
[not found] ` <20200521140931.15232-1-hdanton@sina.com>
2020-05-21 16:04 ` Mel Gorman
[not found] ` <20200522010950.3336-1-hdanton@sina.com>
2020-05-22 11:05 ` Mel Gorman
2020-05-08 9:22 ` Mel Gorman
2020-05-08 11:05 ` Jirka Hladky
[not found] ` <CAE4VaGC_v6On-YvqdTwAWu3Mq4ofiV0pLov-QpV+QHr_SJr+Rw@mail.gmail.com>
2020-05-13 14:57 ` Jirka Hladky
2020-05-13 15:30 ` Mel Gorman
2020-05-13 16:20 ` Jirka Hladky
2020-05-14 9:50 ` Mel Gorman
[not found] ` <CAE4VaGCGUFOAZ+YHDnmeJ95o4W0j04Yb7EWnf8a43caUQs_WuQ@mail.gmail.com>
2020-05-14 10:08 ` Mel Gorman
2020-05-14 10:22 ` Jirka Hladky
2020-05-14 11:50 ` Mel Gorman
2020-05-14 13:34 ` Jirka Hladky
2020-05-14 15:31 ` Peter Zijlstra [this message]
2020-05-15 8:47 ` Mel Gorman
2020-05-15 11:17 ` Peter Zijlstra
2020-05-15 13:03 ` Mel Gorman
2020-05-15 13:12 ` Peter Zijlstra
2020-05-15 13:28 ` Peter Zijlstra
2020-05-15 14:24 ` Peter Zijlstra
2020-05-21 10:38 ` Mel Gorman
2020-05-21 11:41 ` Peter Zijlstra
2020-05-22 13:28 ` Mel Gorman
2020-05-22 14:38 ` Peter Zijlstra
2020-05-15 11:28 ` Peter Zijlstra
2020-05-15 12:22 ` Mel Gorman
2020-05-15 12:51 ` Peter Zijlstra
2020-05-15 14:43 ` Jirka Hladky
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