Re: HZ and real-time performance

Ralf Baechle (ralf@uni-koblenz.de)
Fri, 2 Jul 1999 14:24:31 +0200


On Thu, Jul 01, 1999 at 02:24:21AM -0400, nunca wrote:

> I've been playing with writing real-time guitar effects boxes, and I've
> gotten the latency down to 11ms with stock linux. Would changing the HZ
> constant to 1024 help me reduce the latency (ie, does it cause a task to
> get scheduled more often)? Any other/better suggestions for decreasing
> latency? Thanks in advance.

It has sideffects which need to be taken care of. Since due to hardware
reasons we cannot run all MIPS systems at the same timer interrupt rate
somebody has developed a patch which I plan to send to Linus asap.

Ralf

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