Re: [LKP] [btrfs] c8eaeac7b7: -11.7% regression

From: Rong Chen
Date: Tue Jun 25 2019 - 22:39:31 EST

On 6/25/19 10:22 PM, Josef Bacik wrote:
On Fri, Jun 21, 2019 at 08:48:03AM +0800, Huang, Ying wrote:
"Huang, Ying" <ying.huang@xxxxxxxxx> writes:

"Huang, Ying" <ying.huang@xxxxxxxxx> writes:

Hi, Josef,

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


FYI, we noticed a -11.7% regression of due to commit:

commit: c8eaeac7b734347c3afba7008b7af62f37b9c140 ("btrfs: reserve
delalloc metadata differently") 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
Here's another regression, do you have time to take a look at this?
Ping again ...

Finally got time to look at this but I can't get the reproducer to work

root@destiny ~/lkp-tests# bin/lkp run ~/job-aim.yaml
Traceback (most recent call last):
11: from /root/lkp-tests/bin/run-local:18:in `<main>'
10: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:54:in `require'
9: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:54:in `require'
8: from /root/lkp-tests/lib/yaml.rb:5:in `<top (required)>'
7: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:54:in `require'
6: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:54:in `require'
5: from /root/lkp-tests/lib/common.rb:9:in `<top (required)>'
4: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:54:in `require'
3: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:54:in `require'
2: from /root/lkp-tests/lib/array_ext.rb:3:in `<top (required)>'
1: from /usr/share/rubygems/rubygems/core_ext/kernel_require.rb:54:in `require'
/usr/share/rubygems/rubygems/core_ext/kernel_require.rb:54:in `require': cannot load such file -- active_support/core_ext/enumerable (LoadError)

Hi Josef,

I tried the latest lkp-tests, and didn't have the problem. Could you please update the lkp-tests repo and run "lkp install" again?

Rong Chen

I can't even figure out from the job file or anything how I'm supposed to run
AIM7 itself. This is on a Fedora 30 box, so it's relatively recent. Thanks,