Re: [PATCH]sched: Isochronous class v2 for unprivileged soft rt scheduling

[Con Kolivas]

Jack O'Quin wrote:
> If I look at those png's locally (with gimp or gqview) they have a
> dark grey checkerboard background.  If I look at them on the web (with
> galeon), the background is white.  Go figure.  Maybe the file has no
> background?  I dunno.

Yes there's no background so it depends on what you look at it with. 
Gene already pointed out the checkered background in gimp :)

> I was misreading the x-axis.  They're actually every 20 sec.  My
> system isn't doing that.

Possibly reiserfs journal related. That has larger non-preemptible code 
sections.

> You're really getting hammered with those periodic 6 msec delays,
> though.  The basic audio cycle is only 1.45 msec.

As you've already pointed out, though, they occur even with SCHED_FIFO 
so I'm certain it's an artefact unrelated to cpu scheduling.

Con
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