From: "Björn Steinbrink" <B.Steinbrink@gmx.de>
To: Danial Thom <danial_thom@yahoo.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Measuring tools - top and interrupts
Date: Sat, 24 Jun 2006 04:07:56 +0200 [thread overview]
Message-ID: <20060624020755.GA6139@atjola.homenet> (raw)
In-Reply-To: <20060622165808.71704.qmail@web33303.mail.mud.yahoo.com>
On 2006.06.22 09:58:08 -0700, Danial Thom wrote:
> And 75K pps may not be "much", but its still at
> least 10% of what the system can handle, so it
> should measure around a 10% load. 2.4 measures
> about 12% load. So the only conclusion is that
> load accounting is broken in 2.6.
Are you by chance using procps < 3.1.12? The kernel reports absolute
values for cpu usage, the conversion to percentage is done by top/vmstat
itself. And those old versions don't know about the new fields that 2.6
kernels have in /proc/stat, thus they simply ignore the si and hi
values, producing quite misleading results...
Björn
PS: procps 3.1.12 was released in 2003, so if DEC was stone age and my
assumption about your tools holds, then your tools are like... medieval :)
next prev parent reply other threads:[~2006-06-24 2:07 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-22 15:26 Measuring tools - top and interrupts Danial Thom
2006-06-22 16:19 ` Randy.Dunlap
2006-06-22 17:16 ` Bernd Eckenfels
2006-06-22 16:21 ` Erik Mouw
2006-06-22 16:58 ` Danial Thom
2006-06-22 17:31 ` Erik Mouw
2006-06-22 23:37 ` Danial Thom
2006-06-23 8:32 ` Mike Galbraith
2006-06-23 20:14 ` Danial Thom
2006-06-23 22:51 ` Mike Galbraith
2006-06-23 9:02 ` Erik Mouw
2006-06-23 17:13 ` Alistair John Strachan
2006-06-23 18:16 ` Danial Thom
2006-06-23 5:34 ` sena seneviratne
2006-06-23 20:42 ` Danial Thom
2006-06-22 17:57 ` Francois Romieu
2006-06-22 22:47 ` Danial Thom
2006-06-22 23:53 ` Francois Romieu
2006-06-23 20:34 ` Danial Thom
2006-06-23 21:19 ` Francois Romieu
2006-06-24 2:07 ` Björn Steinbrink [this message]
2006-06-24 4:39 ` sena seneviratne
2006-06-24 5:59 ` Mike Galbraith
2006-06-24 6:26 ` Mike Galbraith
2006-06-24 9:21 ` Björn Steinbrink
2006-06-24 9:51 ` Mike Galbraith
2006-06-24 11:41 ` Mike Galbraith
2006-06-24 15:40 ` Björn Steinbrink
2006-06-24 16:23 ` Mike Galbraith
2006-06-24 19:25 ` Björn Steinbrink
2006-06-25 5:06 ` Mike Galbraith
2006-06-25 11:12 ` Björn Steinbrink
2006-06-25 14:24 ` [PATCH] i386: Fix softirq accounting with 4K stacks Björn Steinbrink
2006-06-25 15:15 ` Arjan van de Ven
2006-06-25 17:44 ` Mike Galbraith
2006-06-25 17:43 ` Arjan van de Ven
2006-06-25 18:42 ` Björn Steinbrink
2006-06-26 2:23 ` Mike Galbraith
2006-06-26 3:05 ` Mike Galbraith
2006-06-26 17:58 ` Björn Steinbrink
2006-06-27 10:09 ` Mike Galbraith
2006-06-25 20:45 ` Measuring tools - top and interrupts Danial Thom
2006-06-26 2:33 ` Mike Galbraith
2006-06-30 13:41 ` Danial Thom
2006-06-30 18:03 ` Mike Galbraith
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