linux-kernel - Re: [LKP] [btrfs] c8eaeac7b7: aim7.jobs-per-min -11.7% regression

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Message-ID: <87blzl7itt.fsf@yhuang-dev.intel.com>
Date:   Wed, 29 May 2019 16:42:22 +0800
From:   "Huang\, Ying" <ying.huang@...el.com>
To:     Josef Bacik <josef@...icpanda.com>
Cc:     David Sterba <dsterba@...e.com>, <lkp@...org>,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        LKML <linux-kernel@...r.kernel.org>
Subject: Re: [LKP] [btrfs]  c8eaeac7b7:  aim7.jobs-per-min -11.7% regression

Hi, Josef,

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

> Greeting,
>
> FYI, we noticed a -11.7% regression of aim7.jobs-per-min due to commit:
>
>
> commit: c8eaeac7b734347c3afba7008b7af62f37b9c140 ("btrfs: reserve delalloc metadata differently")
> https://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git master
>
> in testcase: aim7
> on test machine: 40 threads Intel(R) Xeon(R) CPU E5-2690 v2 @ 3.00GHz with 384G memory
> with following parameters:
>
> 	disk: 4BRD_12G
> 	md: RAID0
> 	fs: btrfs
> 	test: disk_rr
> 	load: 1500
> 	cpufreq_governor: performance
>
> test-description: AIM7 is a traditional UNIX system level benchmark suite which is used to test and measure the performance of multiuser system.
> test-url: https://sourceforge.net/projects/aimbench/files/aim-suite7/

Here's another regression, do you have time to take a look at this?

Best Regards,
Huang, Ying