From: Rik van Riel <riel@redhat.com>
To: Peter Zijlstra <peterz@infradead.org>
Cc: Mike Galbraith <umgwanakikbuti@gmail.com>,
linux-kernel@vger.kernel.org, morten.rasmussen@arm.com,
mingo@kernel.org, george.mccollister@gmail.com,
ktkhai@parallels.com
Subject: Re: [PATCH RFC/TEST] sched: make sync affine wakeups work
Date: Thu, 08 May 2014 22:20:25 -0400 [thread overview]
Message-ID: <536C3B69.1000208@redhat.com> (raw)
In-Reply-To: <20140506203916.GQ17778@laptop.programming.kicks-ass.net>
On 05/06/2014 04:39 PM, Peter Zijlstra wrote:
> On Tue, May 06, 2014 at 04:19:21PM -0400, Rik van Riel wrote:
>> On 05/06/2014 07:54 AM, Peter Zijlstra wrote:
>>> On Fri, May 02, 2014 at 11:19:47AM -0400, Rik van Riel wrote:
>>>> As an aside, it also looks like SD_BALANCE_WAKE is set on all domains
> ^^^^^^^^^^^^^^^
> No BALANCE_WAKE there
Looks like SD_BALANCE_WAKE is not gotten from the sd flags at
all, but passed into select_task_rq by try_to_wake_up, as a
hard coded sd_flags argument.
static int
try_to_wake_up(struct task_struct *p, unsigned int state, int wake_flags)
{
...
cpu = select_task_rq(p, p->wake_cpu, SD_BALANCE_WAKE, wake_flags);
...
static inline
int select_task_rq(struct task_struct *p, int cpu, int sd_flags, int
wake_flags)
{
cpu = p->sched_class->select_task_rq(p, cpu, sd_flags, wake_flags);
...
static int
select_task_rq_fair(struct task_struct *p, int prev_cpu, int sd_flag,
int wake_flags)
{
...
if (sd_flag & SD_BALANCE_WAKE) {
if (cpumask_test_cpu(cpu, tsk_cpus_allowed(p)))
want_affine = 1;
new_cpu = prev_cpu;
}
Should we do that, if SD_WAKE_BALANCE is not set for any sched domain?
--
All rights reversed
next prev parent reply other threads:[~2014-05-09 2:20 UTC|newest]
Thread overview: 46+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-02 4:42 [PATCH RFC/TEST] sched: make sync affine wakeups work Rik van Riel
2014-05-02 5:32 ` Mike Galbraith
2014-05-02 5:41 ` Mike Galbraith
2014-05-02 5:58 ` Mike Galbraith
2014-05-02 6:08 ` Rik van Riel
2014-05-02 6:36 ` Mike Galbraith
2014-05-02 6:51 ` Mike Galbraith
2014-05-02 6:13 ` Mike Galbraith
2014-05-02 6:30 ` Rik van Riel
2014-05-02 7:37 ` Mike Galbraith
2014-05-02 10:56 ` Rik van Riel
2014-05-02 11:27 ` Mike Galbraith
2014-05-02 12:51 ` Mike Galbraith
[not found] ` <5363B793.9010208@redhat.com>
2014-05-06 11:54 ` Peter Zijlstra
2014-05-06 20:19 ` Rik van Riel
2014-05-06 20:39 ` Peter Zijlstra
2014-05-06 23:46 ` Rik van Riel
2014-05-09 2:20 ` Rik van Riel [this message]
2014-05-09 5:27 ` [PATCH] sched: wake up task on prev_cpu if not in SD_WAKE_AFFINE domain with cpu Rik van Riel
2014-05-09 6:04 ` [PATCH] sched: clean up select_task_rq_fair conditionals and indentation Rik van Riel
2014-05-09 7:34 ` [PATCH] sched: wake up task on prev_cpu if not in SD_WAKE_AFFINE domain with cpu Mike Galbraith
2014-05-09 14:22 ` Rik van Riel
2014-05-09 15:24 ` Mike Galbraith
2014-05-09 15:24 ` Rik van Riel
2014-05-09 17:55 ` Mike Galbraith
2014-05-09 18:16 ` Rik van Riel
2014-05-10 3:54 ` Mike Galbraith
2014-05-13 14:08 ` Rik van Riel
2014-05-14 4:08 ` Mike Galbraith
2014-05-14 15:40 ` [PATCH] sched: call select_idle_sibling when not affine_sd Rik van Riel
2014-05-14 15:45 ` Peter Zijlstra
2014-05-19 13:08 ` [tip:sched/core] " tip-bot for Rik van Riel
2014-05-22 12:27 ` [tip:sched/core] sched: Call select_idle_sibling() " tip-bot for Rik van Riel
2014-05-04 11:44 ` [PATCH RFC/TEST] sched: make sync affine wakeups work Preeti Murthy
2014-05-04 12:04 ` Mike Galbraith
2014-05-05 4:38 ` Preeti U Murthy
2014-05-04 12:41 ` Rik van Riel
2014-05-05 4:50 ` Preeti U Murthy
2014-05-05 6:43 ` Preeti U Murthy
2014-05-05 11:28 ` Rik van Riel
2014-05-06 13:26 ` Peter Zijlstra
2014-05-06 13:25 ` Peter Zijlstra
2014-05-06 20:20 ` Rik van Riel
2014-05-06 20:41 ` Peter Zijlstra
2014-05-07 12:17 ` Ingo Molnar
2014-05-06 11:56 ` Peter Zijlstra
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