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

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Date:	Fri, 8 Jul 2016 07:35:56 +0000
From:	KEITA KOBAYASHI <keita.kobayashi.ym@...esas.com>
To:	Morten Rasmussen <morten.rasmussen@....com>,
	"peterz@...radead.org" <peterz@...radead.org>,
	"mingo@...hat.com" <mingo@...hat.com>
CC:	"dietmar.eggemann@....com" <dietmar.eggemann@....com>,
	"yuyang.du@...el.com" <yuyang.du@...el.com>,
	"vincent.guittot@...aro.org" <vincent.guittot@...aro.org>,
	"mgalbraith@...e.de" <mgalbraith@...e.de>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Gaku Inami <gaku.inami.xw@...renesas.com>,
	Yoshihiro Shimoda <yoshihiro.shimoda.uh@...esas.com>,
	KEITA KOBAYASHI <keita.kobayashi.ym@...esas.com>
Subject: RE: [PATCH v2 00/13] sched: Clean-ups and asymmetric cpu capacity
 support

Hi,

I tested these patches on Renesas SoC r8a7790(CA15*4 + CA7*4)
and your preview branch[1] on Renesas SoC r8a7795(CA57*4 + CA53*4).

> 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: Renesas SoC r8a7790(CA15*4 + CA7*4)
  w/  capacity patches: Average events: 200.2
  w/o capacity patches: Average events: 144.4

Target: Renesas SoC r8a7795(CA57*4 + CA53*4)
  w/  capacity patches : 3587.7
  w/o capacity patches : 2327.8

> 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: Renesas SoC r8a7790(CA15*4) (-l 1000)
  w/  capacity patches: 38.955532040 seconds time elapsed ( +-  0.12% )
  w/o capacity patches: 39.424945580 seconds time elapsed ( +-  0.10% )

Target: Renesas SoC r8a7795(CA57*4) (-l 1000)
  w/  capacity patches : 29.804292200 seconds time elapsed ( +-  0.37% )
  w/o capacity patches : 29.838826790 seconds time elapsed ( +-  0.40% )

Tested-by: Keita Kobayashi <keita.kobayashi.ym@...esas.com>

[1] git://linux-arm.org/linux-power.git capacity_awareness_v2_arm64_v1