Re: [SCHED] wrong priority calc - SIMPLE test case

From: Paolo Ornati <ornati@xxxxxxxxxxxxx>
Date: Sat, 31 Dec 2005 18:24:40 +0100

On Sat, 31 Dec 2005 17:37:11 +0100
Mike Galbraith <efault@xxxxxx> wrote:

> >"./a.out 200 & ./a.out 333"
> >
> > PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
> > 5607 paolo 15 0 2396 320 252 R 56.1 0.1 0:06.79 a.out
> > 5606 paolo 15 0 2396 324 252 R 38.7 0.1 0:04.55 a.out
> > 1 root 16 0 2556 552 468 S 0.0 0.1 0:00.28 init
>
> Strange. Using the exact same arguments, I do see some odd bouncing up to
> high priorities, but they spend the vast majority of their time down at 25.

You shouldn't use "the same exact numbers", you should try different
args and see if you can reproduce the problem. Or maybe preemption
make some difference... I'll try with PREEMPT enabled and see.

--
Paolo Ornati
Linux 2.6.15-rc7-plugsched on x86_64
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Follow-Ups:
- Re: [SCHED] wrong priority calc - SIMPLE test case
  - From: Paolo Ornati

References:
- Re: [SCHED] wrong priority calc - SIMPLE test case
  - From: Mike Galbraith
- Re: [SCHED] Totally WRONG prority calculation with specific test-case (since 2.6.10-bk12)
  - From: Con Kolivas
- [SCHED] Totally WRONG prority calculation with specific test-case (since 2.6.10-bk12)
  - From: Paolo Ornati
- Re: [SCHED] Totally WRONG prority calculation with specific test-case (since 2.6.10-bk12)
  - From: Paolo Ornati
- Re: [SCHED] wrong priority calc - SIMPLE test case
  - From: Mike Galbraith

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