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From: Steven Rostedt <rostedt@goodmis.org>
To: "Pallipadi, Venkatesh" <venkatesh.pallipadi@intel.com>
Cc: Ingo Molnar <mingo@elte.hu>, LKML <linux-kernel@vger.kernel.org>,
	Linus Torvalds <torvalds@linux-foundation.org>,
	Andrew Morton <akpm@linux-foundation.org>,
	Thomas Gleixner <tglx@linutronix.de>,
	"Brown, Len" <len.brown@intel.com>,
	Adam Belay <abelay@novell.com>,
	Peter Zijlstra <a.p.zijlstra@chello.nl>, Andi Kleen <ak@suse.de>
Subject: RE: [PATCH] Kick CPUS that might be sleeping in cpus_idle_wait
Date: Thu, 10 Jan 2008 13:03:53 -0500 (EST)	[thread overview]
Message-ID: <Pine.LNX.4.58.0801101301300.15391@gandalf.stny.rr.com> (raw)
In-Reply-To: <924EFEDD5F540B4284297C4DC59F3DEE5A2710@orsmsx423.amr.corp.intel.com>


On Thu, 10 Jan 2008, Pallipadi, Venkatesh wrote:
>
>
> With 2.6.23, you can try compiling acpi processor.ko as a module and
> doing insmod and rmmod in a loop. That should call cpu_idle_wait very
> frequently.

The thing is, after the full boot, there's too many things going on to
keep a system fully idle. Little services can wake a processor up. The
problem I had was that this happens on early bootup where there's not much
around to wake the sleeping processor.

I'm not sure if it is too much of a problem after boot up.

-- Steve


  reply	other threads:[~2008-01-10 18:05 UTC|newest]

Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2008-01-08  2:27 [RFC PATCH] kick sleeping idle CPUS on cpu_idle_wait Steven Rostedt
2008-01-08  3:33 ` Andi Kleen
2008-01-09 20:42   ` [PATCH] Kick CPUS that might be sleeping in cpus_idle_wait Steven Rostedt
2008-01-09 22:12     ` Steven Rostedt
2008-01-10 13:45       ` Ingo Molnar
2008-01-10 14:43         ` Steven Rostedt
2008-01-10 17:31           ` Pallipadi, Venkatesh
2008-01-10 18:03             ` Steven Rostedt [this message]
2008-01-09 23:42     ` Andrew Morton
2008-01-10  0:05       ` Steven Rostedt
2008-01-10  0:12     ` Pallipadi, Venkatesh
     [not found]     ` <B5B0CFF685D7DF46A05CF1678CFB42ED20E00653@orsmsx423.amr.corp.intel.com>
2008-02-08  1:05       ` [PATCH] x86: Simplify cpu_idle_wait Venki Pallipadi
2008-02-08 10:28         ` Andi Kleen
2008-02-08 17:24           ` Venki Pallipadi
2008-02-08 18:45             ` Andi Kleen
2008-02-09  9:33             ` Thomas Gleixner
2008-04-10 16:49               ` Venki Pallipadi

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