Message-ID: <9e4d012f-6ff6-aef4-a70d-cc9f1478921a@intel.com>
Date:   Sat, 28 Jan 2023 11:05:52 +0800
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Subject: Re: [linus:master] [apparmor] 1ad22fcc4d: stress-ng.kill.ops_per_sec
 -42.5% regression
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To:     John Johansen <john.johansen@canonical.com>,
        kernel test robot <oliver.sang@intel.com>
CC:     <oe-lkp@lists.linux.dev>, <lkp@intel.com>,
        <linux-kernel@vger.kernel.org>, <apparmor@lists.ubuntu.com>,
        <ying.huang@intel.com>, <feng.tang@intel.com>,
        <zhengjun.xing@linux.intel.com>
References: <202212311546.755a3ed7-oliver.sang@intel.com>
 <42194ba4-cc3b-c8b3-06e6-e2938df3a87c@intel.com>
 <4fa85b15-1c55-9050-9cd0-fe66c3b957eb@canonical.com>
From:   "Yin, Fengwei" <fengwei.yin@intel.com>
In-Reply-To: <4fa85b15-1c55-9050-9cd0-fe66c3b957eb@canonical.com>
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On 1/28/2023 10:34 AM, John Johansen wrote:
> On 1/27/23 17:37, Yin, Fengwei wrote:
>> Hi John,
>>
>> On 12/31/2022 3:18 PM, kernel test robot wrote:
>>>
>>> Greeting,
>>>
>>> FYI, we noticed a -42.5% regression of stress-ng.kill.ops_per_sec due to commit:
>>>
>>>
>>> commit: 1ad22fcc4d0d2fb2e0f35aed555a86d016d5e590 ("apparmor: rework profile->rules to be a list")
>>> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>>>
>>> in testcase: stress-ng
>>> on test machine: 96 threads 2 sockets Intel(R) Xeon(R) Gold 6252 CPU @ 2.10GHz (Cascade Lake) with 512G memory
>>> with following parameters:
>>>
>>>     nr_threads: 10%
>>>     disk: 1HDD
>>>     testtime: 60s
>>>     fs: ext4
>>>     class: os
>>>     test: kill
>>>     cpufreq_governor: performance
>> Do you think any other information need be collected for this regression
>> report? Thanks.
>>
> 
> no, I know what is causing it, I just haven't had time to fix it yet.
Great. Let us know if you want us to try something out. Thanks.

Regards
Yin, Fengwei

>