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Date: Wed, 18 Dec 2002 16:47:35 -0800
From: "Martin J. Bligh" <mbligh@aracnet.com>
To: Till Immanuel Patzschke <tip@inw.de>,
       lse-tech <lse-tech@lists.sourceforge.net>
cc: "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: [Lse-tech] 15000+ processes -- poor performance ?!
Message-ID: <25840000.1040258855@flay>
In-Reply-To: <3E0116D6.35CA202A@inw.de>
References: <3E0116D6.35CA202A@inw.de>
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> as part of my project I need to run a very high number of processes/threads on a
> linux machine.  Right now I have a Dual-PIII 1.4G w/ 8GB RAM -- I am running
> 4000 processes w/ 2-3 threads each totaling in a process count of 15000+
> processes (since Linux doesn't really distinguish between threads and
> processes...).
> Once I pass the 10000 (+/-) pocesses load increases drastically (on startup,
> although it returns to normal), however the system time (on one processor)
> reaches for 54% (12061 procs) while the only non sleeping process is top -- the
> system is basically doing nothing (except scheduling the "nothing" which
> consumes significant system time).
> Is there anything I can do to reduce that system load/time?  (I haven't been
> able to exactly define the "line" but it definitly gets worse the more processes
> need to be handled.)

You don't even specify what kernel you're using ...

> Does any of the patchsets address this particular problem?

Read the linux-kernel archives.

M.

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