linux-kernel - RE: [PATCHv2 0/7] sched/fair: Migrate 'misfit' tasks on asymmetric capacity systems

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Date:   Tue, 20 Mar 2018 05:30:00 +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: [PATCHv2 0/7] sched/fair: Migrate 'misfit' tasks on asymmetric
 capacity systems

Hi

> -----Original Message-----
> From: Morten Rasmussen [mailto:morten.rasmussen@....com]
> Sent: Thursday, March 15, 2018 11:47 PM
> To: peterz@...radead.org; mingo@...hat.com
> Cc: valentin.schneider@....com; dietmar.eggemann@....com; vincent.guittot@...aro.org; Gaku Inami
> <gaku.inami.xh@...esas.com>; linux-kernel@...r.kernel.org; Morten Rasmussen <morten.rasmussen@....com>
> Subject: [PATCHv2 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
> 

I have tested this on our R-Car again and it works well. In addition,
I confirmed that this patch-set also brings performance improvement to
other benchmarks(e.g. memory load latency in LMbench). You can add:

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

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:                          0.9435s
    total time:                          0.9952s
    total time:                          1.3511s
    total time:                          1.6747s

R-Car H3 (misfit)
    total time:                          0.9387s
    total time:                          0.9280s
    total time:                          0.9616s
    total time:                          0.9934s

10 run summary (tracking longest running task for each run)
	R-Car H3
	avg	max
tip     1.6737  1.6758
misfit  0.9980  1.0409

Regards,
Inami

[snip]