From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: Paul Mackerras <paulus@samba.org>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [patch] dubious process system time.
Date: Fri, 25 Aug 2006 10:18:47 +0200 [thread overview]
Message-ID: <1156493927.1640.5.camel@localhost> (raw)
In-Reply-To: <17646.14556.535277.434642@cargo.ozlabs.ibm.com>
On Fri, 2006-08-25 at 09:40 +1000, Paul Mackerras wrote:
> > The system time that is accounted to a process includes the time spent
> > in three different contexts: normal system time, hardirq time and
> > softirq time.
>
> Is that true (at the moment) with CONFIG_VIRT_CPU_ACCOUNTING=y? I
> thought it wasn't.
CONFIG_VIRT_CPU_ACCOUNTING improves the precision of the numbers that
get accounted with account_[user,system,steal]_time. Which bucket the
time goes into is decided in the three functions.
--
blue skies,
Martin.
Martin Schwidefsky
Linux for zSeries Development & Services
IBM Deutschland Entwicklung GmbH
"Reality continues to ruin my life." - Calvin.
prev parent reply other threads:[~2006-08-25 8:18 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-08-24 12:18 [patch] dubious process system time Martin Schwidefsky
2006-08-24 12:32 ` Andi Kleen
2006-08-24 13:28 ` Martin Schwidefsky
2006-08-24 15:18 ` Andi Kleen
2006-08-24 16:02 ` Martin Schwidefsky
2006-08-25 10:12 ` Helge Hafting
2006-08-25 10:29 ` Martin Schwidefsky
2006-08-25 12:58 ` Paul Mackerras
2006-08-24 23:40 ` Paul Mackerras
2006-08-25 8:18 ` Martin Schwidefsky [this message]
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