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[Xen-devel] Re: A proposal - binary

To: Adrian Bunk <bunk@xxxxxxxxx>
From: Andi Kleen <ak@xxxxxxx>
Date: Sat, 5 Aug 2006 13:57:09 +0200
Cc: Zachary Amsden <zach@xxxxxxxxxx>, Andrew Morton <akpm@xxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Christoph Hellwig <hch@xxxxxxxxxxxxx>, Jack Lo <jlo@xxxxxxxxxx>, Greg KH <greg@xxxxxxxxx>, Rusty Russell <rusty@xxxxxxxxxxxxxxx>, Linux Kernel Mailing List <linux-kernel@xxxxxxxxxxxxxxx>, Chris Wright <chrisw@xxxxxxxxxxxx>, virtualization@xxxxxxxxxxxxxx, Linus Torvalds <torvalds@xxxxxxxx>, James.Bottomley@xxxxxxxxxxxx, pazke@xxxxxxxxx
Delivery-date: Sat, 05 Aug 2006 04:58:12 -0700
List-id: Xen developer discussion <xen-devel.lists.xensource.com>

> 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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References:
- [Xen-devel] Re: A proposal - binary
  - From: Andi Kleen
- [Xen-devel] Re: A proposal - binary
  - From: Adrian Bunk

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