> Hello,
>
> I have BOINC running in the background with niceness 19.
> With a 2.6.22 kernel, only idle cpu cycles get assigned to this process, as
> expected.
>
> But with the 2.6.24 kernel, the BOINC process gets at least about half of
> all CPU cycles, even if there's another process (owned by another user)
> requesting CPU cycles (e.g. "cat /dev/urandom > /dev/null")
>
> This happens with the Ubuntu kernel (from Hardy) and the daily builds from
>
http://kernel-archive.buildserver.net/debian-kernel/ (where I've just tested
> rc8 now).
>
> It appears that every user (here "boinc" and my user) get the same portion
> of the overall CPU cycles, regardless of the process niceness.
>
> Is this expected behaviour?
>
> I'm using an AMD64 3000+ processor. Please ask for additional information, if
> you need it (e.g. kernel config).
>
>
> TESTCASE:
> $ cat /dev/urandom > /dev/null &
> $ sudo -u another_user nice -n 19 python -c 'i = 0;
> while 1:
> i += i
> '
>
> EXPECTED RESULT:
> The niced process should get nearly no CPU cycles.
>
> ACTUAL RESULT:
> The niced process gets about half of the CPU cycles (according to "top").
>
>
> The bug has been reported for Ubuntu on
https://launchpad.net/bugs/177713
>
>
> --
>
http://daniel.hahler.de/
>
