From: kernellwp@gmail.com (Wanpeng Li)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH v8 08/10] sched: add SD_PREFER_SIBLING for SMT level
Date: Tue, 04 Nov 2014 11:21:19 +0800 [thread overview]
Message-ID: <5458462F.6000704@gmail.com> (raw)
In-Reply-To: <1414745252-4895-9-git-send-email-vincent.guittot@linaro.org>
Hi Vincent,
On 14/10/31 ??4:47, Vincent Guittot wrote:
> Add the SD_PREFER_SIBLING flag for SMT level in order to ensure that
> the scheduler will put at least 1 task per core.
What's the behavior before this patch?
Regards,
Wanpeng Li
>
> Signed-off-by: Vincent Guittot <vincent.guittot@linaro.org>
> Reviewed-by: Preeti U. Murthy <preeti@linux.vnet.ibm.com>
> ---
> kernel/sched/core.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> index 37fb92c..731f2ad 100644
> --- a/kernel/sched/core.c
> +++ b/kernel/sched/core.c
> @@ -6165,6 +6165,7 @@ sd_init(struct sched_domain_topology_level *tl, int cpu)
> */
>
> if (sd->flags & SD_SHARE_CPUCAPACITY) {
> + sd->flags |= SD_PREFER_SIBLING;
> sd->imbalance_pct = 110;
> sd->smt_gain = 1178; /* ~15% */
>
next prev parent reply other threads:[~2014-11-04 3:21 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-31 8:47 [PATCH v8 00/10] sched: consolidation of CPU capacity and usage Vincent Guittot
2014-10-31 8:47 ` [PATCH v8 01/10] sched: add per rq cpu_capacity_orig Vincent Guittot
2014-10-31 8:47 ` [PATCH v8 02/10] sched: remove frequency scaling from cpu_capacity Vincent Guittot
2014-10-31 8:47 ` [PATCH v8 03/10] sched: move cfs task on a CPU with higher capacity Vincent Guittot
2014-11-04 8:30 ` Wanpeng Li
2014-11-04 9:41 ` Vincent Guittot
2014-11-04 10:42 ` Wanpeng Li
2014-11-04 11:10 ` Vincent Guittot
2014-11-18 10:47 ` Wanpeng Li
2014-11-18 11:00 ` Vincent Guittot
2014-10-31 8:47 ` [PATCH v8 04/10] sched: add utilization_avg_contrib Vincent Guittot
2014-10-31 8:47 ` [PATCH v8 05/10] sched: Track group sched_entity usage contributions Vincent Guittot
2014-10-31 8:47 ` [PATCH v8 06/10] sched: get CPU's usage statistic Vincent Guittot
2014-10-31 8:47 ` [PATCH v8 07/10] sched: replace capacity_factor by usage Vincent Guittot
2014-11-03 7:01 ` Wanpeng Li
2014-11-03 10:59 ` Vincent Guittot
2014-11-03 15:29 ` Peter Zijlstra
2014-10-31 8:47 ` [PATCH v8 08/10] sched: add SD_PREFER_SIBLING for SMT level Vincent Guittot
2014-11-04 3:21 ` Wanpeng Li [this message]
2014-11-04 8:58 ` Vincent Guittot
2014-10-31 8:47 ` [PATCH v8 09/10] sched: Make sched entity usage tracking scale-invariant Vincent Guittot
2014-10-31 8:47 ` [PATCH v8 10/10] sched: make scale_rt invariant with frequency Vincent Guittot
2014-11-03 15:51 ` Peter Zijlstra
2014-11-03 16:14 ` Vincent Guittot
2014-11-03 2:12 ` [PATCH v8 00/10] sched: consolidation of CPU capacity and usage Wanpeng Li
2014-11-03 10:55 ` Vincent Guittot
2014-11-03 13:03 ` Wanpeng Li
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