1000 HZ linux kernel necessary if I have tickless and high resolution timer?

Posted by Bob on Server Fault See other posts from Server Fault or by Bob
Published on 2012-04-09T21:40:38Z Indexed on 2012/04/09 23:34 UTC
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linux-kernel

I am trying to improve performance on my server. I have a few processes that need low jitter (less than 10ms variance).

I have a load average of 4 maximum on an i7-920 (4 physical cores, 8 with HT). There are about 10 processes ranging from 40% to 90% of a core user mode. System usage is 3% total. Total CPU usage is 80% max.

Will setting the kernel from 100hz to 1000hz improve the jitter if tickless and high resolution timers are already set?

This page seems to indicate it still does something. https://lkml.org/lkml/2009/4/28/401

How about changing from voluntary (PREEMPT_VOLUNTARY) to preemptible (PREEMPT)?

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