[linux-audio-dev] Linux kernel HZ, audio latency and how to measure?

Lee Revell rlrevell at joe-job.com
Fri Aug 18 16:54:55 UTC 2006

On Fri, 2006-08-18 at 12:38 -0400, Paul Davis wrote:
> On Fri, 2006-08-18 at 23:10 +0700, Mulyadi Santosa wrote:
> > Is there any relationship between kernel HZ and audio timing? I imagine 
> no. or almost none.
> recording audio doesn't involve using the system timer at all. the only
> clock involved is the sample clock that drives the audio interface.
> having HZ set too high could conceivably make the system more likely to
> xrun, but this is not likely with a fully RT kernel.

High HZ will improve MIDI timing though.  MIDI is more likely to be
polled than interrupt driven.


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