Re: [lkp-robot] [sched/idle] bb400b924e: fio.write_clat_95%_us -8% improvement

[Huang, Ying <ying.huang@intel.com>]

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"Li, Aubrey" <aubrey.li@intel.com> writes:

> On Friday, April 07, 2017 9:46 AM, Ye, Xiaolong wrote:
>> 
>> >Can you point me a documentation how to do this?
>> >Or can you please show me the detailed steps?
>> 
>> You may refer to lkp-core/doc/performance-work-guide.md.
>
> Thanks, I'll take a look.
>
>> 
>> For simple use, you may
>> 
>> 1) $ lkp queue -b stable/linux-4.8.y -k v4.8.8 -t lkp-bdw-ep2 job.yaml -r 3
>> (attached in the original mail or you can use any other job.yaml customized)
>> 2) $ lkp queue -b fast_idle -k <your head commitid> -t lkp-bdw-ep2 job.yaml -r 3
>> 3) wait above jobs done, you can use `lkp wtmp lkp-bdw-ep2` to check the
>> progress
>> 4) $ lkp compare -at v4.8.8 <your head commitid> // it will show the comparison
>>
>
> Does this guarantee there is no other task running simultaneously when my task
> is scheduled?

Yes.

>> >
>> Actually this is a bisect report, it bisected to the middle patch in your patchset.
>> For the HEAD test result, it shares the same parent directory with the bisected
>> one, you can see it in
>> inn:/result/fio-basic/1SSD-btrfs-300s-8-randwrite-4k-sync-512g-performance/lkp
>> -bdw-ep2/debian-x86_64-2016-08-31.cgz/x86_64-rhel-7.2/gcc-6/<your HEAD
>> commitid>
>>
>
> Is there a way not involving bisect process, what I want is benchmarking my
> kernel image and done, I really don't care which of my patch causes a difference,
> I just care if it's different against a BASE and I care the time, :)

You can queue tests and compare the results by yourself.  The bisect
happens in background, if you don't care the result, just ignore the
result.

Best Regards,
Huang, Ying

>
>> 
>> >
>> >> >
>> >> >(3) I need to dig into the test machine bios to confirm if it's
>> >> >compliant to my expected criteria, how to do that?
>> >> >
>> >>
>> >> The test machine is lkp-bdw-ep2, you may ssh into it to check?
>> >>
>> >
>> >ssh is not good enough to me. I need to change the BIOS setting.
>> >So I need KVM access (screen + keyboard) and root Privilege of that
>> >machine.
>> 
>
>
>
>
>
>> +Lu Lei
>> 
>> Hi, Lei
>> 
>> Can you help on this?
>> 
>
> Thanks,
> -Aubrey