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 ?!
Date: Wed, 18 Dec 2002 17:25:49 -0800 [thread overview]
Message-ID: <20021219012549.GK31800@holomorphy.com> (raw)
In-Reply-To: <Pine.LNX.4.44.0212181711200.7848-100000@dlang.diginsite.com>
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
next prev parent reply other threads:[~2002-12-19 1:19 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2002-12-19 0:46 15000+ processes -- poor performance ?! Till Immanuel Patzschke
2002-12-19 0:47 ` [Lse-tech] " Martin J. Bligh
2002-12-19 0:53 ` Till Immanuel Patzschke
2002-12-19 1:15 ` William Lee Irwin III
2002-12-19 1:12 ` David Lang
2002-12-19 1:25 ` William Lee Irwin III [this message]
2002-12-19 1:20 ` David Lang
2002-12-19 1:36 ` William Lee Irwin III
2002-12-19 1:42 ` Robert Love
2002-12-19 1:44 ` David Lang
2002-12-19 2:05 ` [Lse-tech] " William Lee Irwin III
2002-12-19 15:05 ` Denis Vlasenko
2002-12-19 10:27 ` William Lee Irwin III
2002-12-19 10:37 ` Alex Tomas
2002-12-19 10:55 ` William Lee Irwin III
2002-12-19 15:24 ` Martin J. Bligh
2002-12-19 15:15 ` Denis Vlasenko
2002-12-19 1:24 ` William Lee Irwin III
2002-12-19 0:59 ` Jeff Garzik
2002-12-19 1:11 ` William Lee Irwin III
2002-12-19 14:59 ` Denis Vlasenko
-- strict thread matches above, loose matches on Subject: below --
2002-12-19 1:04 Perez-Gonzalez, Inaky
2002-12-19 1:13 ` Robert Love
2002-12-19 2:31 ` Alan Cox
2002-12-19 1:58 ` Rik van Riel
2002-12-19 2:01 ` William Lee Irwin III
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