Date: Fri, 1 Mar 2024 20:19:57 +0100 From: Juraj Lutter <juraj@lutter.sk> To: FreeBSD stable <freebsd-stable@freebsd.org> Subject: CPU hog in vnlru and arc_prune on 13-STABLE Message-ID: <BFDC2E4E-45B2-4844-BB48-3695E7058F6A@lutter.sk>
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Hi,
I have a fresh (git b9880e247b26) 13.3-STABLE running in bhyve with 2 =
vCPU and 10G of RAM.
I=E2=80=99ve put some load on it (building lang/rust from ports outside =
poudriere, using make -j2) and the system
started to respond very slowly.
I did break the make process and I was able to look into top where there =
was:
PID USERNAME PRI NICE SIZE RES STATE C TIME WCPU =
COMMAND
0 root -8 - 0B 1808K CPU1 1 35:53 99.79% =
kernel{arc_prune}
15 root 20 - 0B 16K RUN 0 34:19 99.35% vnlru
The high CPU usage remains even after 30 minutes after the make was =
stopped.
How can I narrow down the root cause? For the record, the kernel is =
GENERIC.
Thanks
otis
=E2=80=94
Juraj Lutter
XMPP: juraj (at) lutter.sk
GSM: +421907986576
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