Date: Wed, 21 Sep 2022 19:05:54 -0700 From: Kevin Oberman <rkoberman@gmail.com> To: "freebsd-questions@freebsd.org" <questions@freebsd.org> Subject: Disabling CPUs Message-ID: <CAN6yY1s=ds_=yWsEWtVfoXchD5XXqU5uPw6bdFNW%2BdaU6t491A@mail.gmail.com>
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I am looking to disable all 8 E-cores on my Alder Lake system to prevent
repeated crashes. The man page has an example of this:
Modify the cpuset all threads are in by default to contain only the first 4
CPUs, leaving the rest idle:
cpuset -l 0-3 -s 1
I did this, but in subsequent port build, all 12 "CPUs" were running at
100%. Am I missing something? Maybe use -p 1" instead of "-s 1".
I also found suggestions to use "hint.lapic.N.disabled", but teh lines that
were supposed to be in dmesg and the messages log were not present. I am
baffled, but really need to do something to stop the crashes currently
impacting Alder Lake systems.
--
Kevin Oberman, Part time kid herder and retired Network Engineer
E-mail: rkoberman@gmail.com
PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683
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<div dir=3D"ltr"><div class=3D"gmail_default" style=3D"font-family:tahoma,s=
ans-serif;font-size:small">I am looking to disable all 8 E-cores on my Alde=
r Lake system to prevent repeated crashes. The man page has an example of t=
his:</div><div class=3D"gmail_default" style=3D"font-family:tahoma,sans-ser=
if;font-size:small">Modify the cpuset all threads are in by default to cont=
ain only the first 4 CPUs, leaving the rest idle:<br>=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0cpuset -l 0-3 -s 1</div><div style=3D"font-family:tahom=
a,sans-serif;font-size:small" class=3D"gmail_default">I did this, but in su=
bsequent port build, all 12 "CPUs" were running at 100%. Am I mis=
sing something? Maybe use -p 1" instead of "-s 1".</div><div=
style=3D"font-family:tahoma,sans-serif;font-size:small" class=3D"gmail_def=
ault"><br></div><div style=3D"font-family:tahoma,sans-serif;font-size:small=
" class=3D"gmail_default">I also found suggestions to use "hint.lapic.=
N.disabled", but teh lines that were supposed to be in dmesg and the m=
essages log were not present. I am baffled, but really need to do something=
to stop the crashes currently impacting Alder Lake systems.<br></div>-- <b=
r><div dir=3D"ltr" class=3D"gmail_signature" data-smartmail=3D"gmail_signat=
ure"><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div dir=3D"ltr"><div><div=
dir=3D"ltr">Kevin Oberman, Part time kid herder and retired Network Engine=
er<br>E-mail: <a href=3D"mailto:rkoberman@gmail.com" target=3D"_blank">rkob=
erman@gmail.com</a><br></div><div>PGP Fingerprint: D03FB98AFA78E3B78C1694B3=
18AB39EF1B055683</div></div></div></div></div></div></div></div></div>
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