From mboxrd@z Thu Jan  1 00:00:00 1970
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Date: Thu,  9 Jan 2014 09:08:19 +0100
Message-ID: <CAGNd-2N++nfx65sNWaRr9UfVoSrWLiU4=YTt_Ly3_0+pwJh-1w@mail.gmail.com>
From: =?ISO-8859-1?Q?Pavel_Klinkovsk=FD?= <pavel.klinkovsky@gmail.com>
To: Fans of the OS Plan 9 from Bell Labs <9fans@9fans.net>
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Subject: Re: [9fans] Maximal number of processes
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Hi Steven,


    conf.nproc = 100 + ((conf.npage*BY2PG)/MB)*5;
>     if(cpuserver)
>             conf.nproc *= 3;
>     if(conf.nproc > 2000)
>             conf.nproc = 2000;
>
> In general, you will find that 2000 is the highest allowable due to
> limits imposed by proc.c.


but if I understand it correctly it is just "soft limit", not a "hard" one
inborn in CPU architecture.

By the hard limit I consider something like "maximal capacity of GDT, LDT"
or something similar, if exists.


> At the end of the day, the only way to be sure is to read the source.
>

I did (of course, I am not an expert on Plan9 kernel), and I did not find
any "hard limit" there.
However to be sure I issued my question here.

Pavel

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<div dir=3D"ltr">Hi Steven,<br><div class=3D"gmail_extra"><br><br><div clas=
s=3D"gmail_quote"><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .=
8ex;border-left:1px #ccc solid;padding-left:1ex">=A0 =A0 conf.nproc =3D 100=
 + ((conf.npage*BY2PG)/MB)*5;<br>

=A0 =A0 if(cpuserver)<br>
=A0 =A0 =A0 =A0 =A0 =A0 conf.nproc *=3D 3;<br>
=A0 =A0 if(conf.nproc &gt; 2000)<br>
=A0 =A0 =A0 =A0 =A0 =A0 conf.nproc =3D 2000;<br>
<br>
In general, you will find that 2000 is the highest allowable due to<br>
limits imposed by proc.c.</blockquote><div><br></div><div>but if I understa=
nd it correctly it is just &quot;soft limit&quot;, not a &quot;hard&quot; o=
ne inborn in CPU architecture.</div><div><br></div><div>By the hard limit I=
 consider something like &quot;maximal capacity of GDT, LDT&quot; or someth=
ing similar, if exists.</div>
<div>=A0</div><blockquote class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;=
border-left:1px #ccc solid;padding-left:1ex">At the end of the day, the onl=
y way to be sure is to read the source.<br></blockquote><div><br></div><div=
>I did (of course, I am not an expert on Plan9 kernel), and I did not find =
any &quot;hard limit&quot; there.</div>
<div>However to be sure I issued my question here.</div><div><br></div><div=
>Pavel</div></div></div></div>

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