linux-kernel - RE: [PATCH 0/7] sched/fair: Migrate 'misfit' tasks on asymmetric capacity systems

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Date:   Wed, 28 Feb 2018 07:46:03 +0000
From:   Gaku Inami <gaku.inami.xh@...esas.com>
To:     Morten Rasmussen <morten.rasmussen@....com>,
        "peterz@...radead.org" <peterz@...radead.org>,
        "mingo@...hat.com" <mingo@...hat.com>
CC:     "valentin.schneider@....com" <valentin.schneider@....com>,
        "dietmar.eggemann@....com" <dietmar.eggemann@....com>,
        "vincent.guittot@...aro.org" <vincent.guittot@...aro.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 0/7] sched/fair: Migrate 'misfit' tasks on asymmetric
 capacity systems

Hi

> -----Original Message-----
> From: linux-kernel-owner@...r.kernel.org [mailto:linux-kernel-owner@...r.kernel.org] On Behalf Of Morten Rasmussen
> Sent: Friday, February 16, 2018 1:21 AM
> To: peterz@...radead.org; mingo@...hat.com
> Cc: valentin.schneider@....com; dietmar.eggemann@....com; vincent.guittot@...aro.org; linux-kernel@...r.kernel.org;
> Morten Rasmussen <morten.rasmussen@....com>
> Subject: [PATCH 0/7] sched/fair: Migrate 'misfit' tasks on asymmetric capacity systems
> 
<snip>
> 
> The patches have been tested on:
>    1. Arm Juno (r0): 2+4 Cortex A57/A53
>    2. Hikey960: 4+4 Cortex A73/A53
> 
> Test case:
> Big cpus are always kept busy. Pin a shorter running sysbench tasks to
> big cpus, while creating a longer running set of unpinned sysbench
> tasks.

Tested-by: Gaku Inami <gaku.inami.xh@...esas.com>

I tested as same in other SoC. It looks fine.

The patches have been tested on:
   3. Renesas R-Car H3 : 4+4 Cortex A57/A53

Results:
Single runs with completion time of each task
R-Car H3 (tip)
    total time:                          0.9415s
    total time:                          0.9582s
    total time:                          1.3275s
    total time:                          1.6752s

R-Car H3 (misfit)
    total time:                          0.9312s
    total time:                          0.9429s
    total time:                          0.9525s
    total time:                          0.9660s

10 run summary (tracking longest running task for each run)
	R-Car H3
	avg	max
tip     1.6752  1.6753
misfit  0.9890  1.0204

Regards,
Inami