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Message-ID: <e14d546c-b1c6-448b-d8ac-50d072802c98@linux.intel.com>
Date: Fri, 27 Nov 2020 09:51:41 +0800
From: Xing Zhengjun <zhengjun.xing@...ux.intel.com>
To: Chris Wilson <chris@...is-wilson.co.uk>,
Joonas Lahtinen <joonas.lahtinen@...ux.intel.com>,
Oliver Sang <oliver.sang@...el.com>
Cc: feng.tang@...el.com, tiejun.li@...el.com, guangli.li@...el.com,
frank.du@...el.com, guobing.chen@...el.com, jiebin.sun@...el.com,
Shuhua.Fan@...el.com, Matthew Auld <matthew.auld@...el.com>,
fan.zhao@...el.com, ying.huang@...el.com, shan.kang@...el.com,
zhengjun.xing@...el.com, Wenhuan.Huang@...el.com,
intel-gfx@...ts.freedesktop.org, lkp@...ts.01.org,
ming.a.chen@...el.com, yu.ma@...el.com, jessica.ji@...el.com,
dapeng1.mi@...el.com, wangyang.guo@...el.com,
LKML <linux-kernel@...r.kernel.org>, gengxin.xie@...el.com
Subject: Re: [Intel-gfx] [drm/i915/gem] 59dd13ad31:
phoronix-test-suite.jxrendermark.RadialGradientPaint.1024x1024.operations_per_second
-54.0% regression
On 11/27/2020 5:34 AM, Chris Wilson wrote:
> Quoting Xing Zhengjun (2020-11-26 01:44:55)
>>
>>
>> On 11/25/2020 4:47 AM, Chris Wilson wrote:
>>> Quoting Oliver Sang (2020-11-19 07:20:18)
>>>> On Fri, Nov 13, 2020 at 04:27:13PM +0200, Joonas Lahtinen wrote:
>>>>> Hi,
>>>>>
>>>>> Could you add intel-gfx@...ts.freedesktop.org into reports going
>>>>> forward.
>>>>>
>>>>> Quoting kernel test robot (2020-11-11 17:58:11)
>>>>>>
>>>>>> Greeting,
>>>>>>
>>>>>> FYI, we noticed a -54.0% regression of phoronix-test-suite.jxrendermark.RadialGradientPaint.1024x1024.operations_per_second due to commit:
>>>>>
>>>>> How many runs are there on the bad version to ensure the bisect is
>>>>> repeatable?
>>>>
>>>> test 4 times.
>>>> zxing@inn:/result/phoronix-test-suite/performance-true-Radial_Gradient_Paint-1024x1024-jxrendermark-1.2.4-ucode=0xd6-monitor=da39a3ee/lkp-cfl-d1/debian-x86_64-phoronix/x86_64-rhel-8.3/gcc-9/59dd13ad310793757e34afa489dd6fc8544fc3da$ grep -r "operations_per_second" */stats.json
>>>> 0/stats.json: "phoronix-test-suite.jxrendermark.RadialGradientPaint.1024x1024.operations_per_second": 4133.487932,
>>>> 1/stats.json: "phoronix-test-suite.jxrendermark.RadialGradientPaint.1024x1024.operations_per_second": 4120.421503,
>>>> 2/stats.json: "phoronix-test-suite.jxrendermark.RadialGradientPaint.1024x1024.operations_per_second": 4188.414835,
>>>> 3/stats.json: "phoronix-test-suite.jxrendermark.RadialGradientPaint.1024x1024.operations_per_second": 4068.549514,
>>>
>>> a w/o revert (drm-tip)
>>> b w/ revert
>>> +mB----------------------------------------------------------------------------+
>>> | ..b |
>>> | ..b.aa |
>>> | ....a.a |
>>> | ....a.a |
>>> | b b ........a |
>>> | b b b b......... a |
>>> | b bb bbb........... |
>>> |b ab bbab.bb.b............ba b a a ab a|
>>> | |__A__| |
>>> | |MA_| |
>>> +------------------------------------------------------------------------------+
>>> N Min Max Median Avg Stddev
>>> a 120 3621.8761 7356.4442 4606.7895 4607.9132 156.17693
>>> b 120 2664.0563 6359.9686 4519.5036 4534.4463 95.471121
>>>
>>> The patch is not expected to have any impact on the machine you are testing on.
>>> -Chris
>>>
>>
>> What's your code base?
>> For my side:
>> 1) sync the code to the head of Linux mainline
>> 2) git reset --hard 59dd13ad31
>> 3) git revert 59dd13ad3107
>> We compare the test result of commit 59dd13ad3107 (step 2) and
>> 2052847b06f8 (step 3, revert 59dd13ad3107), the regression should
>> related with 59dd13ad3107. Each test case we run 5 times.
>
> a 59dd13ad31
> b revert
> +mB----------------------------------------------------------------------------+
> | a |
> | aa |
> | .b....ba |
> | .b....baa b |
> | .........b . b b |
> | a b.......... ..bb b b |
> | b a b.............b.a b b |
> |a a b. .aaa..b.............b..b....ab b a .|
> | |__A__| |
> | |___A_____| |
> +------------------------------------------------------------------------------+
> N Min Max Median Avg Stddev
> a 120 3658.3435 6363.7812 4527.4406 4536.612 86.095459
> b 120 3928.9643 6375.829 4576.0482 4585.4224 157.284
>
Could you share with me your test commands and the hardware info, then I
can reproduce it on my side? Thanks.
--
Zhengjun Xing
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