Re: [linux-next:master] [block/mq] 574e7779cf: fio.write_iops -72.9% regression

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hi, Jens Axboe,

On Thu, Feb 01, 2024 at 07:30:53AM -0700, Jens Axboe wrote:
> On 2/1/24 7:03 AM, Oliver Sang wrote:
> > hi, Jens Axboe,
> > 
> > On Thu, Feb 01, 2024 at 06:40:07AM -0700, Jens Axboe wrote:
> >> On 2/1/24 12:18 AM, Oliver Sang wrote:
> >>> hi, Jens Axboe,
> >>>
> >>> On Wed, Jan 31, 2024 at 11:42:46AM -0700, Jens Axboe wrote:
> >>>> On 1/31/24 11:17 AM, Bart Van Assche wrote:
> >>>>> On 1/31/24 07:42, kernel test robot wrote:
> >>>>>> kernel test robot noticed a -72.9% regression of fio.write_iops on:
> >>>>>>
> >>>>>>
> >>>>>> commit: 574e7779cf583171acb5bf6365047bb0941b387c ("block/mq-deadline: use separate insertion lists")
> >>>>>> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git master
> >>>>>>
> >>>>>> testcase: fio-basic
> >>>>>> test machine: 64 threads 2 sockets Intel(R) Xeon(R) Gold 6346 CPU @ 3.10GHz (Ice Lake) with 256G memory
> >>>>>> parameters:
> >>>>>>
> >>>>>>     runtime: 300s
> >>>>>>     disk: 1HDD
> >>>>>>     fs: xfs
> >>>>>>     nr_task: 100%
> >>>>>>     test_size: 128G
> >>>>>>     rw: write
> >>>>>>     bs: 4k
> >>>>>>     ioengine: io_uring
> >>>>>>     direct: direct
> >>>>>>     cpufreq_governor: performance
> >>>>>
> >>>>> The actual test is available in this file:
> >>>>> https://download.01.org/0day-ci/archive/20240131/202401312320.a335db14-oliver.sang@xxxxxxxxx/repro-script
> >>>>>
> >>>>> I haven't found anything in that file for disabling merging. Merging
> >>>>> requests decreases IOPS. Does this perhaps mean that this test is
> >>>>> broken?
> >>>>
> >>>> It's hard to know as nothing in this email or links include the actual
> >>>> output of the job...
> >>>
> >>> I attached a dmesg and 2 outputs while running tests on 574e7779cf.
> >>> not sure if they are helpful?
> >>
> >> Both fio outputs is all I need, but I only see one of them attached?
> > 
> > while we running fio, there are below logs captured:
> > fio
> > fio.output
> > fio.task
> > fio.time
> > 
> > I tar them in fio.tar.gz as attached.
> > you can get them by 'tar xzvf fio.tar.gz'
> 
> Right, but I need BOTH outputs - one from before the commit and the one
> on the commit. The report is a regression, hence there must be both a
> good and a bad run output... This looks like just the same output again,
> I can't really do much with just one output.

oh, didn't get you... sorry.
attached fio-8f764b91fd.tar.gz is from one parent run.

> 
> -- 
> Jens Axboe
> 

Attachment: fio-8f764b91fd.tar.gz
Description: application/gzip


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