On Thu, 2001-09-20 at 04:21, Andrea Arcangeli wrote:
> > You've forgotten a one liner.
> >
> > #include <linux/locks.h>
> > +#include <linux/compiler.h>
>
> woops, didn't trapped it because of gcc 3.0.2. thanks.
>
> > But this is not enough. Even with reniced artsd (-20).
> > Some shorter hiccups (0.5~1 sec).
>
> I'm not familiar with the output of the latency bench, but I actually
> read "4617" usec as the worst latency, that means 4msec, not 500/1000
> msec.
Right, the patch is returning the length preemption was unavailable
(which is when a lock is held) in us. So it is indded 4ms.
But, I think Dieter is saying he _sees_ 0.5~1s latencies (in the form of
audio skips). This is despite the 4ms locks being held.
-- Robert M. Love rml at ufl.edu rml at tech9.net- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sun Sep 23 2001 - 21:00:40 EST