I don't see how you can conclude, that this is an AMD related problem
now. It's not impossible but is it likely ? I don't think so.
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I have never done that before, how long would that take ? Were you able
to reproduce the issue BTW ?
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Title:
Kernel
To quote myself from the original bug report: "I ran the tests on ZFS
and ext4, it makes no difference."
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Title:
Kernel
10 days later, it would be interesting for me to learn, if anyone
attempted to reproduce this and what the results were ? You'd have to
find a reasonably large project to compile with cmake/ninja that takes
around a minute or more to build. And you'd time the build time on each
kernel version.
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Then I did the same on 5.19. There is a huge difference.
I am fairly certaan that everything from "zio_execute" to "SHA256Tra..." is
time spent in ZFS. To the right right side of `SHA256Tra...` is the compiler, I
checked this when looking at it in more detail. The compiler graph is basically
I sampled 10s of the build in both kernels with `perf` and run hotspot
on it for a flamegraph.
** Attachment added: "Flamegraph of 10s action on 15"
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2007717/+attachment/5649865/+files/flamegraph-15.png
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So I tried this again with 5.19.0-32 and "amd_pstate=passive". Checked
with `dmesg` that it was indeed the right kernel and the right option.
But it makes no difference. Still 45s build time on 5.15.0-60 vs 1m on
5.19.0-32.
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bonnie++ runs apparently proportional with installed RAM size, which
means on my machine it takes forever and does considerable SSD wear (I
cancelled it after a few minutes). I could run something less punishing
like maybe fio, with some parameters of your choosing.
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I should add that I am using cmake/ninja. Ninja is usually better at
maximizing the CPU load than make and my system has 32 true CPU cores
and 64 hyperthreading ones.
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apport information
** Attachment added: "ProcModules.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648237/+files/ProcModules.txt
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** Attachment added: "ProcInterrupts.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648236/+files/ProcInterrupts.txt
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** Attachment added: "WifiSyslog.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648241/+files/WifiSyslog.txt
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** Attachment added: "PulseList.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648238/+files/PulseList.txt
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** Attachment added: "acpidump.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648242/+files/acpidump.txt
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** Attachment added: "UdevDb.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648240/+files/UdevDb.txt
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** Attachment added: "RfKill.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648239/+files/RfKill.txt
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** Attachment added: "ProcEnviron.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648235/+files/ProcEnviron.txt
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** Attachment added: "ProcCpuinfoMinimal.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648234/+files/ProcCpuinfoMinimal.txt
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** Attachment added: "Lsusb.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648229/+files/Lsusb.txt
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** Attachment added: "ProcCpuinfo.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648233/+files/ProcCpuinfo.txt
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** Attachment added: "Lspci-vt.txt"
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** Attachment added: "PaInfo.txt"
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** Attachment added: "Lsusb-v.txt"
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** Attachment added: "Lsusb-t.txt"
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** Attachment added: "Lspci.txt"
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** Attachment added: "IwConfig.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648226/+files/IwConfig.txt
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** Attachment added: "CurrentDmesg.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648225/+files/CurrentDmesg.txt
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** Tags added: apport-collected jammy wayland-session
** Description changed:
I just yesterday and the day before made some benchmark tests for a
comparison between ext4 and zfs. I ran repeated builds of a large
software package and it always came out to 45s. Now today
apport information
** Attachment added: "AudioDevicesInUse.txt"
https://bugs.launchpad.net/bugs/2007717/+attachment/5648224/+files/AudioDevicesInUse.txt
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** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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Title:
Userspace break as a result of missing
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