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Fio regression caused by f9fc8932b11f3bcf2a2626f567cb6fdd36a33a94
From: |
Lukáš Doktor |
Subject: |
Fio regression caused by f9fc8932b11f3bcf2a2626f567cb6fdd36a33a94 |
Date: |
Tue, 3 May 2022 09:43:15 +0200 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:91.0) Gecko/20100101 Thunderbird/91.7.0 |
Hello Mike, Paolo, others,
in my perf pipeline I noticed a regression bisected to the
f9fc8932b11f3bcf2a2626f567cb6fdd36a33a94 - "thread-posix: remove the posix
semaphore support" commit and I'd like to ask you to verify it might have
caused that and eventually consider fixing it. The regression is visible,
reproducible and clearly bisectable to this commit with the following 2
scenarios:
1. fio write 4KiB using the nbd ioengine on localhost
2. fio read 4KiB using #cpu jobs and iodepth=8 on a rotational disk using qcow2
image and default virt-install
<disk type="file" device="disk">
<driver name="qemu" type="qcow2"/>
<source
file="/var/lib/libvirt/images/RHEL-8.4.0-20210503.1-virtlab506.DefaultLibvirt0.qcow2"/>
<target dev="vda" bus="virtio"/>
</disk>
but smaller regressions can be seen under other scenarios as well since this
commit. You can find the report from bisections here:
https://ldoktor.github.io/tmp/RedHat-virtlab506/v7.0.0/RedHat-virtlab506-f9fc8932b11f3bcf2a2626f567cb6fdd36a33a94-RHEL-8.4.0-20210503.1-1.html
https://ldoktor.github.io/tmp/RedHat-virtlab506/v7.0.0/RedHat-virtlab506-f9fc8932b11f3bcf2a2626f567cb6fdd36a33a94-RHEL-8.4.0-20210503.1-2.html
Regards,
Lukáš
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- Fio regression caused by f9fc8932b11f3bcf2a2626f567cb6fdd36a33a94,
Lukáš Doktor <=