20 Jan
2007
20 Jan
'07
6:56 p.m.
On 1/20/07, linuxmedia4(a)netscape.net <linuxmedia4(a)netscape.net> wrote:
--
Mike Taht
PostCards From the Bleeding Edge
http://the-edge.blogspot.com
"Have you noticed that the earth is tipped away from the sun at the moment?
Really sloppy quality control. I filed a request to have it tipped towards
the sun again, but you know how these things go. Probably take 'em 6 months
to fix it" - E.H.
>> Can anyone spot where the "weak link" is in my system. I put in this
>> post (what I believe) is the most relevant information...
Is cpuspeed running? If so, disable it.
Also I note that ingo is keeping a repository of the latest rt kernels (he's
at 2.6.20 something at present) at:
http://people.redhat.com/mingo/realtime-preempt/yum.README
This series has been pretty good for me, but YMMV
> My system...
> Dell Precision M50 laptop
> 2 GHz Processor
> 1 Gig Ram
> 2.6.16-1.2080.16.rrt.rhfc5.ccrma
> 7200rpm hard drive
>
> 'cat /proc/interrupts' (before disabling peripherals) shows:
> 11: 8900 XT-PIC [........./ 0] yenta, yenta, yenta,
> pcmcia2.0, Indigo IO, uhci_hcd:usb1, uhci_hcd:usb2, ohci1394
What does IRQ 11 look like when the unused
drivers are unloaded?
Actually, I never went back to (en)abling the peripherals in BIOS. I'll
wait untill I finally find the culprit and then enable them and see what
happens. So this reflects my current situation...
0: 555937 XT-PIC [........N/ 0] pit
1: 1344 XT-PIC [........./ 1] i8042
2: 0 XT-PIC [........N/ 0] cascade
7: 0 XT-PIC [........./ 0] Intel 82801CA-ICH3, Intel
82801CA-ICH3 Modem
8: 1 XT-PIC [........./ 0] rtc
9: 0 XT-PIC [........./ 0] acpi
11: 7038 XT-PIC [........./ 0] yenta, yenta, Indigo IO,
uhci_hcd:usb1, uhci_hcd:usb2, ohci1394, eth0
12: 24456 XT-PIC [........./ 0] i8042
14: 14998 XT-PIC [........./ 0] ide0
NMI: 0
LOC: 0
ERR: 0
MIS: 0
Did you run the rtirq script?
During bootup, I see mentions of S88rtirq, so I looked and I see there
is '/etc/rc.d/rc3.d/S88rtirq'.
Does JACK report xruns when these glitches
happen?
While recording with ecasound (with realtime privileges) and running
'jackd -v -R -dalsa -r48000 -p512 -n2 -D -Chw:2 -Phw:2'... during the
interruptions, I received these messages...
(I get interruptions with every combination of periods and buffer sizes
I've tried)
delay of 42746.000 usecs exceeds estimated spare time of 9632.000;
restart ...
delay of 42669.000 usecs exceeds estimated spare time of 9625.000;
restart ...
delay of 42647.000 usecs exceeds estimated spare time of 9608.000;
restart ...
delay of 42646.000 usecs exceeds estimated spare time of 9700.000;
restart ...
delay of 42600.000 usecs exceeds estimated spare time of 9741.000;
restart ...
Thanks... keep the suggestions coming. I'm not going to settle for this
as the result after investing 5 years into Linux/Audio.
Rocco