From: Mike Galbraith <efault@gmx.de>
To: danial_thom@yahoo.com
Cc: linux-kernel@vger.kernel.org
Subject: Re: Measuring tools - top and interrupts
Date: Sat, 24 Jun 2006 08:26:23 +0200 [thread overview]
Message-ID: <1151130383.7545.1.camel@Homer.TheSimpsons.net> (raw)
In-Reply-To: <1151128763.7795.9.camel@Homer.TheSimpsons.net>
On Sat, 2006-06-24 at 07:59 +0200, Mike Galbraith wrote:
> On Thu, 2006-06-22 at 09:58 -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.
>
> For UP, yes. SMP kernel accounts irq processing time properly.
For my little box, the below cures it.
--- linux-2.6.17x/arch/i386/kernel/apic.c.org 2006-06-24 08:08:46.000000000 +0200
+++ linux-2.6.17x/arch/i386/kernel/apic.c 2006-06-24 08:09:16.000000000 +0200
@@ -1175,9 +1175,7 @@ EXPORT_SYMBOL(switch_ipi_to_APIC_timer);
inline void smp_local_timer_interrupt(struct pt_regs * regs)
{
profile_tick(CPU_PROFILING, regs);
-#ifdef CONFIG_SMP
update_process_times(user_mode_vm(regs));
-#endif
/*
* We take the 'long' return path, and there every subsystem
next prev parent reply other threads:[~2006-06-24 6:22 UTC|newest]
Thread overview: 45+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-22 15:26 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
2006-06-24 4:39 ` sena seneviratne
2006-06-24 5:59 ` Mike Galbraith
2006-06-24 6:26 ` Mike Galbraith [this message]
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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