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)?