14 Aug
2003
14 Aug
'03
12:14 p.m.
At Thu, 14 Aug 2003 02:55:28 +0300 (EEST),
Kai Vehmanen wrote:
For example, one new approach to the problem SCHED_SOFTRR, see:
http://www.xmailserver.org/linux-patches/softrr.html
http://www.ussg.iu.edu/hypermail/linux/kernel/0307.1/1729.html
It's unlikely to get something like this enabled by default in the vanilla
kernel, but we might be able to get a kernel option (no patching!). But,
but, as you can see from the discussion, they are talking about totally
different things (how XMMS/realplayer performs)...
... basicly a way to get benefits of SCHED_FIFO but without need for root
privileges. Now we just need to push these to the standard kernel somehow.
i think the most benifit of soft-RR is that it doesn't bring your box
hanging up even if a RT-process gets into an infinite loop. this will
help to sort out the problem when a JACK system freezes with
SCHED_FIFO. (i.e. if it happens with soft-RR, it's a kernel/driver
bug :)
running by the normal user is an additional gift, for my eyes.
such a feature can be implemented with a wrapper (library), too,
as jackstart does.
Takashi