From: Andi Kleen <andi@firstfloor.org>
To: Ingo Molnar <mingo@elte.hu>
Cc: Andi Kleen <andi@firstfloor.org>,
Venki Pallipadi <venkatesh.pallipadi@intel.com>,
Thomas Gleixner <tglx@linutronix.de>,
Andrew Morton <akpm@linux-foundation.org>,
linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH] Track accurate idle time with tick_sched.idle_sleeptime
Date: Sun, 2 Sep 2007 09:46:22 +0200 [thread overview]
Message-ID: <20070902074622.GA16045@one.firstfloor.org> (raw)
In-Reply-To: <20070902072806.GC5075@elte.hu>
> at least the current out-of-idle code already does what amounts to a
> PM-timer read when exiting from C2 or C3 mode. The
C2/C3 are already slow. I more worry about C1.
Also doing two instead of one can have an impact even on C2+, especially
when the operation can be thousands of cycles.
-Andi
next prev parent reply other threads:[~2007-09-02 7:46 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-08-27 21:56 [PATCH] Track accurate idle time with tick_sched.idle_sleeptime Venki Pallipadi
2007-08-31 18:22 ` Ingo Molnar
2007-08-31 18:24 ` Ingo Molnar
2007-08-31 18:26 ` Pallipadi, Venkatesh
2007-09-01 22:23 ` Andi Kleen
2007-09-02 7:28 ` Ingo Molnar
2007-09-02 7:46 ` Andi Kleen [this message]
2007-09-02 10:02 ` Ingo Molnar
2007-09-10 18:59 ` Pallipadi, Venkatesh
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