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Date:      Thu, 26 May 2022 14:59:28 +0300
From:      Christos Chatzaras <chris@cretaforce.gr>
To:        questions@freebsd.org
Subject:   Issue with ULE scheduler
Message-ID:  <D259E4B9-775E-41BA-8524-13B912293EC1@cretaforce.gr>

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CPU: AMD Ryzen 9 5950X 16 Cores (32 Threads)


I use this command to compress a lot of images:

find . -iname "*.jpg" -exec ~/graphicsmagick/bin/gm mogrify -strip -quality 75% {} > /dev/null 2>&1 \;


The issue is that GraphicsMagick (the same with ImageMagick) after some time hangs, the process usage is 100% and truss shows:

sched_yield() = 0 (0x0)
sched_yield() = 0 (0x0)
sched_yield() = 0 (0x0)


Does anyone else has such issues with ULE scheduler ?


I found this https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=208421 which may be related.


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