linux-kernel - Re: [PATCH v2 00/13] sched: Clean-ups and asymmetric cpu capacity support

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Message-Id: <1467109227-25635-1-git-send-email-koansin.tan@gmail.com>
Date:	Tue, 28 Jun 2016 18:20:27 +0800
From:	Koan-Sin Tan <koansin.tan@...il.com>
To:	Morten Rasmussen <morten.rasmussen@....com>
Cc:	dietmar.eggemann@....com, yuyang.du@...el.com,
	vincent.guittot@...aro.org, mgalbraith@...e.de,
	linux-kernel@...r.kernel.org, peterz@...radead.org,
	mingo@...hat.com
Subject: Re: [PATCH v2 00/13] sched: Clean-ups and asymmetric cpu capacity support

Hi,

I tested these patches with patches from your preview branch [1] and some
platform specific patches on MediaTek MT8173 EVB (integrated branch at [2])

> Test 0:
> 	for i in `seq 1 10`; \
> 	       do sysbench --test=cpu --max-time=3 --num-threads=1 run; \
> 	       done \
> 	| awk '{if ($4=="events:") {print $5; sum +=$5; runs +=1}} \
> 	       END {print "Average events: " sum/runs}'
> Target: ARM TC2 (2xA15+3xA7)
> 
> 	(Higher is better)
> tip:	Average events: 146.9
> patch:	Average events: 217.9

Target: MediaTek MT8173 EVB (2xA53+2xA72)

w/o capacity patches:
	274.7 (actually, it varies a lot between 194 and 329
w/ capacity patches:
	328.7

> Test 1:
> 	perf stat --null --repeat 10 -- \
> 	perf bench sched messaging -g 50 -l 5000
> 
> Target: Intel IVB-EP (2*10*2)
> 
> tip:    4.861970420 seconds time elapsed ( +-  1.39% )
> patch:  4.886204224 seconds time elapsed ( +-  0.75% )
> 
> Target: ARM TC2 A7-only (3xA7) (-l 1000)
> 
> tip:    61.485682596 seconds time elapsed ( +-  0.07% )
> patch:  62.667950130 seconds time elapsed ( +-  0.36% )
> 

Target: MediaTek MT8173 EVB A53-only (2xA7) (-l 1000)

w/o capacity patches:
	72.663181227 seconds time elapsed ( +-  1.62% )
	71.502263666 seconds time elapsed ( +-  0.45% ) 
	73.707466212 seconds time elapsed ( +-  0.99% )
        73.623523997 seconds time elapsed ( +-  1.85% )
     	74.150137066 seconds time elapsed ( +-  1.41% )

w/ capacity patches:
	70.360055056 seconds time elapsed ( +-  1.58% ) 
	69.884793481 seconds time elapsed ( +-  0.78% )
	73.395917166 seconds time elapsed ( +-  1.86% )
	70.082440427 seconds time elapsed ( +-  1.66% )
	69.365401758 seconds time elapsed ( +-  0.80% )

Tested-by: Koan-Sin Tan <freedom.tan@...iatek.com>

[1] git://linux-arm.org/linux-power.git capacity_awareness_v2_arm64_v1
[2] https://git.linaro.org/people/freedom.tan/linux-8173.git v4.7-rc5-mt8173-capacity