Hi, Josef,
kernel test robot <[email protected]> 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
