Re: loop-aes nice value

[Jari Ruusu <jari.ruusu@pp.inet.fi>]

Newsmail wrote:
> Hi Jari, I saw that you changed the default nice value for the loop device
> when the kernel is using mingo's sched. If I remember that value was -9.
> Did you choose '-9' as a + - arbitrary value under 0, but over -20, or it
> has some special reason to be -9 and not -5 for exemple?

I read Ingo's O(1) scheduler comments from kernel source. Process' nice is
dynamically adjusted -5...+5 based on how it has behaved in past. So, I
first tested with nice -5. Interactivity was OK with that. I kept increasing
priority until bad interactivity appeared at nice -10, so I chose -9.
Temporary bad interactivity still appeared at -9, but at -10 it was
sustained bad interactivity.

Regards,
Jari Ruusu <jari.ruusu@pp.inet.fi>

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