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Date: Wed, 18 Dec 2002 17:25:49 -0800
From: William Lee Irwin III <wli@holomorphy.com>
To: David Lang <dlang@diginsite.com>
Cc: Till Immanuel Patzschke <tip@inw.de>,
       lse-tech <lse-tech@lists.sourceforge.net>,
       "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>
Subject: Re: 15000+ processes -- poor performance ?!
Message-ID: <20021219012549.GK31800@holomorphy.com>
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	David Lang <dlang@diginsite.com>,
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On Wed, Dec 18, 2002 at 05:12:41PM -0800, David Lang wrote:
> also top is very inefficant with large numbers of processes. use vmstat
> or cat out the files in /proc to get the info more efficiantly (it won't
> get you per process info, but it son't cause the interferance with your
> desired load that top gives you.)

It's mostly just the fact top(1) doesn't scan /proc/ incrementally and
that proc_pid_readdir() is quadratic in the number of tasks.


Bill
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