lkml.org 
[lkml]   [2019]   [Apr]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
SubjectRe: [LKP] [btrfs] 302167c50b: fio.write_bw_MBps -12.4% regression
Date
Hi, Josef,

kernel test robot <rong.a.chen@intel.com> writes:

> Greeting,
>
> FYI, we noticed a -12.4% regression of fio.write_bw_MBps due to commit:
>
>
> commit: 302167c50b32e7fccc98994a91d40ddbbab04e52 ("btrfs: don't end the transaction for delayed refs in throttle")
> https://git.kernel.org/cgit/linux/kernel/git/next/linux-next.git pending-fixes
>
> in testcase: fio-basic
> on test machine: 88 threads Intel(R) Xeon(R) CPU E5-2699 v4 @ 2.20GHz with 64G memory
> with following parameters:
>
> runtime: 300s
> nr_task: 8t
> disk: 1SSD
> fs: btrfs
> rw: randwrite
> bs: 4k
> ioengine: sync
> test_size: 400g
> cpufreq_governor: performance
> ucode: 0xb00002e
>
> test-description: Fio is a tool that will spawn a number of threads or processes doing a particular type of I/O action as specified by the user.
> test-url: https://github.com/axboe/fio
>
>

Do you have time to take a look at this regression?

Best Regards,
Huang, Ying

\
 
 \ /
  Last update: 2019-04-26 08:14    [W:0.127 / U:0.232 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site