From: William Lee Irwin III <wli@holomorphy.com>
To: Denis Vlasenko <vda@port.imtp.ilyichevsk.odessa.ua>
Cc: David Lang <david.lang@digitalinsight.com>,
Robert Love <rml@tech9.net>, Till Immanuel Patzschke <tip@inw.de>,
lse-tech <lse-tech@lists.sourceforge.net>,
linux-kernel@vger.kernel.org
Subject: Re: [Lse-tech] Re: 15000+ processes -- poor performance ?!
Date: Thu, 19 Dec 2002 02:27:20 -0800 [thread overview]
Message-ID: <20021219102720.GT31800@holomorphy.com> (raw)
In-Reply-To: <200212191015.gBJAFss28329@Port.imtp.ilyichevsk.odessa.ua>
On 19 December 2002 00:05, William Lee Irwin III wrote:
>> Well, a better solution would be a userspace free of /proc/
>> dependency.
>> Or actually fixing the kernel. proc_pid_readdir() wants an
>> efficiently indexable linear list, e.g. TAOCP's 6.2.3 "Linear List
>> Representation". At that point its expense is proportional to the
>> buffer size and "seeking" about the list as it is wont to do is
>> O(lg(processes)).
On Thu, Dec 19, 2002 at 01:05:03PM -0200, Denis Vlasenko wrote:
> A short-time solution: run top d 30 to make it refresh only every 30 seconds.
> This will greatly reduce top's own load skew.
As userspace solutions go your suggestions is just as good. The kernel
still needs to get its act together and with some urgency.
Bill
next prev parent reply other threads:[~2002-12-19 10:23 UTC|newest]
Thread overview: 21+ 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
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 [this message]
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
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