30 Sep
2005
30 Sep
'05
4:02 p.m.
On 9/30/05, Antonio <debian(a)fastwebnet.it> wrote:> On Fri, 2005-09-30 at 12:18
+0200, Carotinho wrote:> [cut]> > I read at> >
http://www.jacklab.net/index.php?option=com_content&task=blogcategory&a…
> that you should use the Realtime Preemption Patch and then enable it.> >
I'm running a 2.6.12 kernel patched with this and using also the realtime-lsm> >
module.> > But now I'm confused, because> > 1) "less
/sys/block/hda/queue/scheduler" gives me "noop [anticipatory]> > deadline
cfq", so where is the realtime preemption? Is it useful since you do> > not
even mention it?>> Maybe you are confusing the Realtime Preemption Patch with the
I/O> scheduler. The I/O scheduler do the scheduling for the hd access. While> the
Realtime Preemption Patch modifies the processes's scheduler, I> think. They are
two different and indipendent things.>> > 2)I discovered that the rlimits way
it's better: is it true? Is it also> > simpler than loading the realtime module,
which I can do in a straightforward> > way?>> The rlimits is the new
(mainline) way to give the user realtime> privileges. The realtime-lsm module
wasn't accepted in the mainline> kernel for security risk. So if you don't mind
the security risk and you> already know how to compile and load the module, you can
continue to use> the realtime-lsm module. At least until your distribution don't
include> all the pieces needed to use rlimits. This is my understanding, please>
correct me if I'm wrong.>> Best regards,>> ~ Antonio
Hi, Yes, I believe these schedulers has different responsibilities.
Probably I should report this in a separate thread. I do not intendto do any thread
hijacking here but it does seem related.
Yesterday I finally managed to build 2.6.14-rc2-rt7 for my AMD64system. Out of the box
it's working very, very well. I've doneabsolutely no configuration of the system.
I've not set anythingspecial. Just booted it, started Jack at 128/2 as a user
usingrealtime-lsm, and have been streaming ogg files for 4 hours from oneof my 1394a audio
drives. In that time I've been browsing the web,doing email and updating the system.
I've built a new kernel, copied abunch of files from drive to drive and run a couple
of existing Ardoursessions. While all of that was going on I fired up xine and played aDVD
movie in the background on my EIDE DVD drive just to create somemore system usage.
I've not had a single operational xrun in nearly 4 hours. The onlyones I've had
come when starting and stopping apps.
Everything's working great for me, but this is less than 24 hoursso far so take it
with a grain of salt.
This is Gentoo, AMD64 3000+, 512MB, 250GB SATA drive, 4 1394 harddrives( three 1394a
and one 1394b) , PCI-Express 16X ATI.
Note: Executables seem larger on this AMD64 system. I'll needanother 512MB one day
soon as I do seee a small amount of swapping onthis system. (<30KB) I never saw that
when running 32-bit.
Cheers,Mark