From: Andi Kleen <ak@suse.de>
To: Adrian Bunk <bunk@stusta.de>
Subject: Re: A proposal - binary
Date: Sat, 5 Aug 2006 13:57:09 +0200
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Cc: Zachary Amsden <zach@vmware.com>, Chris Wright <chrisw@sous-sol.org>,
       Greg KH <greg@kroah.com>,
       Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
       Linus Torvalds <torvalds@osdl.org>, Andrew Morton <akpm@osdl.org>,
       Christoph Hellwig <hch@infradead.org>,
       Rusty Russell <rusty@rustcorp.com.au>, Jack Lo <jlo@vmware.com>,
       virtualization@lists.osdl.org, xen-devel@lists.xensource.com,
       James.Bottomley@steeleye.com, pazke@donpac.ru
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> Has anyone measured the performance impact of rutime CLOCK_TICK_RATE 
> switching (since this will no longer allow some compile time 
> optimizations in jiffies.h)?

SUSE shipped a kernel briefly that had runtime switchable jiffies
and there were some benchmarks done and they didn't show noticeable
slowdown.

But with hr timers it should be pretty much obsolete anyways.

-Andi

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