Re: realtime-preempt and arm

[tike64]

Ingo Molnar <mingo@xxxxxxx> wrote:
> tike64 <tike64@xxxxxxxxx> wrote:
> > Ok, understood; I tried this:
> > 
> > 	t = raw_timer();
> > 	ts.tv_nsec = 5000000;
> > 	ts.tv_sec = 0;
> > 	nanosleep(&ts, 0);
> > 	t = raw_timer() - t;
> > 
> > It is better but I still see 8ms occasional delays when listing 
> > nfs-mounted directories onto FB. And, what is funny, also this
> > version makes the average delay 20ms as if it made the jiffy 20ms.
> 
> ARM has no high resolution timers support yet in the -rt tree.

Yes, but is there a reason why the -rt patch seems to make the 10ms
jiffy 20ms and why the jitter is so high. I don't need high resolution
but reasonable, a couple of milliseconds, jitter.

--

tike



 
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