lkml.org 
[lkml]   [2015]   [Mar]   [24]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: [RFCv3 PATCH 47/48] sched: Enable active migration for cpus of lower capacity
On Wed, Feb 04, 2015 at 06:31:24PM +0000, Morten Rasmussen wrote:
> Add an extra criteria to need_active_balance() to kick off active load
> balance if the source cpu is overutilized and has lower capacity than
> the destination cpus.
>
> cc: Ingo Molnar <mingo@redhat.com>
> cc: Peter Zijlstra <peterz@infradead.org>
>
> Signed-off-by: Morten Rasmussen <morten.rasmussen@arm.com>
> ---
> kernel/sched/fair.c | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index 92fd1d8..1c248f8 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -7379,6 +7379,13 @@ static int need_active_balance(struct lb_env *env)
> return 1;
> }
>
> + if ((capacity_of(env->src_cpu) < capacity_of(env->dst_cpu)) &&
> + env->src_rq->cfs.h_nr_running == 1 &&
> + cpu_overutilized(env->src_cpu, env->sd) &&
> + !cpu_overutilized(env->dst_cpu, env->sd)) {
> + return 1;
> + }

Ah, see does this want to get squashed into the previuos patch? Together
they seem to make more sense.


\
 
 \ /
  Last update: 2015-03-24 17:21    [W:0.507 / U:2.100 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site