From: Martin Schwidefsky <schwidefsky@de.ibm.com>
To: "Luck, Tony" <tony.luck@intel.com>
Cc: "linux-arch@vger.kernel.org" <linux-arch@vger.kernel.org>,
Heiko Carstens <heiko.carstens@de.ibm.com>,
Paul Mackerras <paulus@samba.org>,
Benjamin Herrenschmidt <benh@kernel.crashing.org>,
Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>,
Jeremy Fitzhardinge <jeremy@xensource.com>,
Chris Wright <chrisw@sous-sol.org>,
Michael Neuling <mikey@neuling.org>
Subject: RE: [patch 0/4] [RFC] true vs. system idle cputime
Date: Thu, 09 Oct 2008 10:03:58 +0200 [thread overview]
Message-ID: <1223539438.17171.3.camel@localhost> (raw)
In-Reply-To: <57C9024A16AD2D4C97DC78E552063EA353175370@orsmsx505.amr.corp.intel.com>
On Wed, 2008-10-08 at 14:22 -0700, Luck, Tony wrote:
> > There is one change in patch #2 that might require a change on powerpc
> > and/or ia64. The generic TICK_ONESHOT/NO_HZ code calculates the number
> > of ticks spent with a disabled HZ timer and accounts this as idle time.
>
> Your patches apply, build and boot cleanly on ia64.
>
> At the moment ia64 doesn't do NO_HZ (exisiting cpus only support a C1
> state, which we can enter/leave pretty quickly ... so power saving
> for NO_HZ is negligible) ... so your code change isn't an issue for
> ia64.
Thanks for checking.
--
blue skies,
Martin.
"Reality continues to ruin my life." - Calvin.
next prev parent reply other threads:[~2008-10-09 8:11 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-10-08 16:19 [patch 0/4] [RFC] true vs. system idle cputime Martin Schwidefsky
2008-10-08 16:19 ` [patch 1/4] fix scaled & unscaled cputime accounting Martin Schwidefsky
2008-10-16 4:31 ` Paul Mackerras
2008-10-08 16:20 ` [patch 2/4] idle " Martin Schwidefsky
2008-10-16 4:59 ` Paul Mackerras
2008-10-16 6:42 ` Martin Schwidefsky
2008-10-16 9:08 ` Martin Schwidefsky
2008-10-08 16:20 ` [patch 3/4] improve precision of idle accounting Martin Schwidefsky
2008-10-08 16:20 ` [patch 4/4] improve idle cputime accounting Martin Schwidefsky
2008-10-08 21:22 ` [patch 0/4] [RFC] true vs. system idle cputime Luck, Tony
2008-10-09 8:03 ` Martin Schwidefsky [this message]
2008-10-15 14:01 ` Martin Schwidefsky
2008-10-15 20:56 ` Benjamin Herrenschmidt
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