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From: Steven Sistare <steven.sistare@oracle.com>
To: mingo@redhat.com, peterz@infradead.org
Cc: subhra.mazumdar@oracle.com, dhaval.giani@oracle.com,
	rohit.k.jain@oracle.com, daniel.m.jordan@oracle.com,
	pavel.tatashin@microsoft.com, matt@codeblueprint.co.uk,
	umgwanakikbuti@gmail.com, riel@redhat.com, jbacik@fb.com,
	juri.lelli@redhat.com, linux-kernel@vger.kernel.org
Subject: Re: [PATCH 09/10] sched/fair: disable stealing if too many NUMA nodes
Date: Tue, 23 Oct 2018 09:18:42 -0400	[thread overview]
Message-ID: <629c5dc5-cde4-76de-4680-9fb5ecfd26cd@oracle.com> (raw)
In-Reply-To: <1540220381-424433-10-git-send-email-steven.sistare@oracle.com>

On 10/22/2018 10:59 AM, Steve Sistare wrote:
[...]
> diff --git a/kernel/sched/topology.c b/kernel/sched/topology.c
> index f18c416..b7d2070 100644
> --- a/kernel/sched/topology.c
> +++ b/kernel/sched/topology.c
> @@ -1337,6 +1337,30 @@ static void init_numa_topology_type(void)
>  	}
>  }
>  
> +DEFINE_STATIC_KEY_TRUE(sched_steal_allow);
> +static int sched_steal_node_limit;
> +#define SCHED_STEAL_NODE_LIMIT_DEFAULT 1

This is an oversight; I meant to suggest a value of 2.  All my 2-socket 
testing was done with stealing enabled.

- Steve

  parent reply	other threads:[~2018-10-23 13:19 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2018-10-22 14:59 [PATCH 00/10] steal tasks to improve CPU utilization Steve Sistare
2018-10-22 14:59 ` [PATCH 01/10] sched: Provide sparsemask, a reduced contention bitmap Steve Sistare
2018-10-22 14:59 ` [PATCH 02/10] sched/topology: Provide hooks to allocate data shared per LLC Steve Sistare
2018-10-22 14:59 ` [PATCH 03/10] sched/topology: Provide cfs_overload_cpus bitmap Steve Sistare
2018-10-22 14:59 ` [PATCH 04/10] sched/fair: Dynamically update cfs_overload_cpus Steve Sistare
2018-10-22 16:56   ` Peter Zijlstra
2018-10-22 18:43     ` Steven Sistare
2018-10-22 14:59 ` [PATCH 05/10] sched/fair: Hoist idle_stamp up from idle_balance Steve Sistare
2018-10-25 13:47   ` Valentin Schneider
2018-10-25 14:04     ` Steven Sistare
2018-10-22 14:59 ` [PATCH 06/10] sched/fair: Generalize the detach_task interface Steve Sistare
2018-10-22 14:59 ` [PATCH 07/10] sched/fair: Provide can_migrate_task_llc Steve Sistare
2018-10-26 18:04   ` Valentin Schneider
2018-10-26 18:28     ` Steven Sistare
2018-10-29 19:34       ` Valentin Schneider
2018-10-31 15:43         ` Steven Sistare
2018-10-31 18:48           ` Valentin Schneider
2018-10-31 19:14         ` Peter Zijlstra
2018-11-01 11:16           ` Valentin Schneider
2018-10-22 14:59 ` [PATCH 08/10] sched/fair: Steal work from an overloaded CPU when CPU goes idle Steve Sistare
2018-10-25 13:48   ` Valentin Schneider
2018-10-25 14:07     ` Steven Sistare
2018-10-22 14:59 ` [PATCH 09/10] sched/fair: disable stealing if too many NUMA nodes Steve Sistare
2018-10-22 17:06   ` Peter Zijlstra
2018-10-22 18:47     ` Steven Sistare
2018-10-22 19:21       ` Steven Sistare
2018-10-22 22:05         ` Peter Zijlstra
2018-10-23 13:18   ` Steven Sistare [this message]
2018-10-22 14:59 ` [PATCH 10/10] sched/fair: Provide idle search schedstats Steve Sistare
2018-10-22 17:04 ` [PATCH 00/10] steal tasks to improve CPU utilization Peter Zijlstra
2018-10-22 19:07   ` Steven Sistare
2018-10-22 22:09     ` Peter Zijlstra
2018-10-24 15:34     ` Valentin Schneider
2018-10-24 19:27       ` Steven Sistare
2018-10-25 11:31         ` Valentin Schneider
2018-10-25 12:21           ` Steven Sistare
2018-10-25  7:50 ` Vincent Guittot
2018-10-25 11:28   ` Steven Sistare
2018-10-25 12:43     ` Vincent Guittot
2018-10-25 14:19       ` Steven Sistare
2018-10-31 19:35 ` Steven Sistare
2018-11-01 11:56 ` Steven Sistare
2018-11-02 23:39 ` Subhra Mazumdar
2018-11-05 20:08   ` Steven Sistare
2019-01-04 13:37 ` Shijith Thotton

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