linux-kernel - Re: [patch] dubious process system time.

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Message-Id: <1156493927.1640.5.camel@localhost>
Date:	Fri, 25 Aug 2006 10:18:47 +0200
From:	Martin Schwidefsky <schwidefsky@...ibm.com>
To:	Paul Mackerras <paulus@...ba.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [patch] dubious process system time.

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.

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