Re: [SCHED] Totally WRONG prority calculation with specific test-case (since 2.6.10-bk12)

[Con Kolivas <kernel@kolivas.org>]

On Wednesday 28 December 2005 22:01, Paolo Ornati wrote:
> 	after some hours of running transcode (with me away from the
> machine) I've found a totally UNUSABLE system. Transcode was the king
> of the machine and everything else get almost no CPU time. Switching to
> a Text-Console takes something like 10s (or something like that). When
> I was finally logged in as root I've reniced transcode and companyto +19
> and the system was usable again ;)
>
> To get things even more STRANGE: another time that this happened I've
> done the same thing except that I've reniced them to "0" (the same nice
> level they were running) ---> And the system became usable again (with
> the usual slow down but still usable).
>
> This is what I remember. Now I think we can agree that there is
> something wrong... no?

This latter thing sounds more like your transcode job pushed everything out to 
swap... You need to instrument this case better.

Con