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** 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 I
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** Attachment added: "AudioDevicesInUse.txt"
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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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https:/
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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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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I sampled 10s of the build in both kernels with `perf` and run hotspot
on it for a flamegraph.
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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
the
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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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 linux-image-
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 linux-image-5.19
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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T
** Tags removed: verification-needed-bionic
** Tags added: verification-done-bionic
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Title:
Userspace break as a result of missing p
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