linux-kernel - Re: A proposal

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Message-Id: <200608051357.09432.ak@suse.de>
Date:	Sat, 5 Aug 2006 13:57:09 +0200
From:	Andi Kleen <ak@...e.de>
To:	Adrian Bunk <bunk@...sta.de>
Cc:	Zachary Amsden <zach@...are.com>,
	Chris Wright <chrisw@...s-sol.org>, Greg KH <greg@...ah.com>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...l.org>,
	Andrew Morton <akpm@...l.org>,
	Christoph Hellwig <hch@...radead.org>,
	Rusty Russell <rusty@...tcorp.com.au>,
	Jack Lo <jlo@...are.com>, virtualization@...ts.osdl.org,
	xen-devel@...ts.xensource.com, James.Bottomley@...eleye.com,
	pazke@...pac.ru
Subject: Re: A proposal - binary


> 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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