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Date:      Sat, 18 Feb 2023 17:09:21 -0500
From:      Zaphod Beeblebrox <zbeeble@gmail.com>
To:        freebsd-hackers@freebsd.org
Subject:   Re: avoiding periodic(8) during long poudriere runs
Message-ID:  <CACpH0MdrKQyk4fMu--6VKVtH-z4g1XqAeP8j-skZqwfB3wDQZQ@mail.gmail.com>
In-Reply-To: <Y/FJmq6Zx0Rgphdx@int21h>
References:  <Y/EE%2BWabwqiLifBx@int21h> <c64dd767-298d-c3a7-0cf6-cd7b8a58a656@quip.cz> <Y/FJmq6Zx0Rgphdx@int21h>
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lockf(1) can be used at the beginning of a script:

lockf -t 60 /tmp/mylockfile /root/bin/myscript

and then when you're running poudriere,

lockf /tmp/mylockfile poudriere <other args>

On Sat, Feb 18, 2023 at 4:57 PM void <void@f-m.fm> wrote:

> On Sat, Feb 18, 2023 at 09:46:43PM +0100, Miroslav Lachman wrote:
>
> >I don't know about any generic way, but you can put some shell code into
> >/etc/periodic.conf to exit if load is too high
> >
> >Just a quick and dirty example, exit if 5 minutes avg is higher than 1.1:
> >
> >avg5load=$(top | awk '/load averages:/ { load=$7+0; if (load > 1.1) {
> >print "HIGH" } }')
> >echo $avg5load
> >if [ "$avg5load" = "HIGH" ]; then
> >         echo "CPU load is too high"
> >         exit 5
> >fi
>
> Many thanks for this. I didn't know one could put scripting into
> periodic.conf!
>
> --
>
>

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<div dir=3D"ltr"><div>lockf(1) can be used at the beginning of a script:</d=
iv><div><br></div><div>lockf -t 60 /tmp/mylockfile /root/bin/myscript<br></=
div><div><br></div><div>and then when you&#39;re running poudriere,</div><d=
iv><br></div><div>lockf /tmp/mylockfile poudriere &lt;other args&gt;<br></d=
iv></div><br><div class=3D"gmail_quote"><div dir=3D"ltr" class=3D"gmail_att=
r">On Sat, Feb 18, 2023 at 4:57 PM void &lt;<a href=3D"mailto:void@f-m.fm">=
void@f-m.fm</a>&gt; wrote:<br></div><blockquote class=3D"gmail_quote" style=
=3D"margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding=
-left:1ex">On Sat, Feb 18, 2023 at 09:46:43PM +0100, Miroslav Lachman wrote=
:<br>
<br>
&gt;I don&#39;t know about any generic way, but you can put some shell code=
 into<br>
&gt;/etc/periodic.conf to exit if load is too high<br>
&gt;<br>
&gt;Just a quick and dirty example, exit if 5 minutes avg is higher than 1.=
1:<br>
&gt;<br>
&gt;avg5load=3D$(top | awk &#39;/load averages:/ { load=3D$7+0; if (load &g=
t; 1.1) {<br>
&gt;print &quot;HIGH&quot; } }&#39;)<br>
&gt;echo $avg5load<br>
&gt;if [ &quot;$avg5load&quot; =3D &quot;HIGH&quot; ]; then<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0echo &quot;CPU load is too high&quot;=
<br>
&gt;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0exit 5<br>
&gt;fi<br>
<br>
Many thanks for this. I didn&#39;t know one could put scripting into period=
ic.conf!<br>
<br>
-- <br>
<br>
</blockquote></div>

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