4 Oct
2007
4 Oct
'07
10:33 a.m.
On Thursday 04 October 2007, Jacob wrote:
Hi,
On Thu, Oct 04, 2007 at 10:29:56AM +0200, Florian Schmidt wrote:
Ok thanks for clearing this up :) So in principle there actually even might be
partially (or only) negative prios for SCHED_FIFO processes.
Thanks,
Flo
--
Palimm Palimm!
http://tapas.affenbande.org
[...]
And yes, i consider it a bug that top and other software report the
SCHED_FIFO prio as negative values. Where does that come from? Does the
prio already get listed as negative in /proc? Or do they simply do it to
separate the SCHED_FIFO threads from SCHED_OTHER threads? Anyways POSIX
speaks of positive SCHED_FIFO prios in the range 1..99 afaik..
Hmmm, POSIX talks about priorities in the range of
min .. max,
where
min = sched_get_priority_min(alg)
max = sched_get_priority_max(alg)
max - min >= 32, if alg == SCHED_FIFO or alg == SCHED_RR
and alg being the the scheduling algorithm (like SCHED_FIFO, ...)
Under Linux (according to 'man sched_get_priority_min') the follwoing
ranges apply:
SCHED_FIFO : min = 1, max = 99
SCHED_RR : min = 1, max = 99
SCHED_OTHER : min = 0, max = 0