Messages in this thread |  | | Date | Mon, 2 Sep 2002 23:44:46 +0200 (CEST) | From | Tobias Ringstrom <> | Subject | Re: Problem with the O(1) scheduler in 2.4.19 |
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On Mon, 2 Sep 2002, Tobias Ringstrom wrote:
> On 2 Sep 2002, Alan Cox wrote: > > > It isnt a regression, its a bug fix. The nice value is now being > > honoured properly. > > The problem is that the kernel decided to nice the process (by changing > the priority, not the nice value) as if it was a background task, but it's > not a background task. On the contrary, it's highly interactive.
I think I will have to take this back. It looks like even the old kernel treats the game server as a background process, but as you said, it does not make such a big difference. Another change is that the prio value varies very quickly over time (as seen in top). I do not recall seeing that using the O(1)-scheduler.
But I still do not understand why the process is classified as non-interactive... Around 20 times per second it does a nanosleep for 1 ms which takes around 40 ms in reality. (Seeing this makes me believe that I should try to increase HZ, but that is a separate issue.)
/Tobias
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