3 Nov
2012
3 Nov
'12
12:24 p.m.
On Sat, 03 Nov 2012 11:32:21 +0100
Florian Paul Schmidt <mista.tapas(a)gmx.net> wrote:
On 11/03/2012 10:40 AM, Ralf Mardorf wrote:
Thank you Flo :)
if I remove all USB stuff I still see irq/18-ohci_hcd [1].
Regards,
Ralf
[1]
$ top
2583 spinymou 20 0 1155m 310m 107m S 9.3 8.4 3:09.87
qtractor
2827 spinymou 20 0 392m 47m 21m S 1.7 1.3 0:05.03
plugin-containe
2562 spinymou 20 0 275m 89m 82m S 1.3 2.4 0:27.17
jackd
15 root -2 0 0 0 0 S 1.0 0.0 0:04.39
ksoftirqd/1
1264 root 20 0 150m 36m 14m S 1.0 1.0 1:05.48
Xorg
2577 spinymou 20 0 536m 110m 100m S 1.0 3.0 0:10.23
qjackctl.real
2785 spinymou 20 0 922m 139m 43m S 0.7 3.8 0:37.66
firefox
58 root -79 0 0 0 0 S 0.3 0.0 0:02.06
irq/18-ohci_hcd
60 root -78 0 0 0 0 S 0.3 0.0 0:03.43
irq/18-ohci_hcd
849 root -86 0 0 0 0 S 0.3 0.0 0:05.95
irq/18-snd_hdsp
2159 spinymou 20 0 163m 14m 9m S 0.3 0.4 0:08.91
panel-25-weathe
2487 spinymou 20 0 476m 18m 13m S 0.3 0.5 0:04.61
xfce4-terminal
1 root 20 0 24432 2320 1272 S 0.0 0.1 0:01.27
init
spinymouse@qrc:~$ cat /proc/interrupts | grep 18
18: 0 752885 IO-APIC-fasteoi ohci_hcd:usb4,
ohci_hcd:usb6, snd_hdspm
spinymouse@qrc:~$ /etc/init.d/rtirq status
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
62 FF 90 - 130 0.0 S irq/8-rtc0
849 FF 85 - 125 0.1 S irq/18-snd_hdsp
908 FF 85 - 125 0.0 S irq/20-snd_ice1
911 FF 85 - 125 0.0 S irq/21-snd_ice1
54 FF 80 - 120 0.0 S irq/19-ehci_hcd
55 FF 80 - 120 0.0 S irq/16-ohci_hcd
56 FF 79 - 119 0.0 S irq/17-ohci_hcd
58 FF 78 - 118 0.0 S irq/18-ohci_hcd
59 FF 78 - 118 0.0 S irq/17-ohci_hcd
60 FF 77 - 117 0.0 S irq/18-ohci_hcd
61 FF 75 - 115 0.0 S irq/1-i8042
24 FF 50 - 90 0.0 S irq/9-acpi
46 FF 50 - 90 0.0 S irq/22-ahci
214 FF 50 - 90 0.0 S irq/14-pata_ati
215 FF 50 - 90 0.0 S irq/15-pata_ati
301 FF 50 - 90 0.0 S irq/22-firewire
720 FF 50 - 90 0.0 S irq/7-parport0
727 FF 50 - 90 0.0 S irq/43-radeon
1111 FF 50 - 90 0.0 S irq/42-eth0
3 FF 1 - 41 0.3 S ksoftirqd/0
15 FF 1 - 41 0.1 S ksoftirqd/1
I noticed something interesting about kernel
3.6.5-rt14.
[..]
Unfortunately it didn't solve xrun issues for
the RME card. However,
the kernel does switch to another IRQ for the graphics, for all
other kernels on different distros, the graphics always gets IRQ18,
also if I switch the integrated ATI with a Nvidia.
Hi, this is a long shot, but you might play around with the PCI bus
latency settings for different devices.. I.e. turn them down from the
default value and see if it helps at all. I'm no expert in this, so
make sure to read up on the subject.
http://www.mythtv.org/wiki/PCI_Latency
Maybe some device (most probably a GPU or a NIC) holds on to the PCI
bus for too long..
Flo