13 Aug
2006
13 Aug
'06
4:21 p.m.
Hi
I run xubuntu on a IBM T41 laptop with Pentium M 1.6 and 1G ram.
Reading this (http://tapas.affenbande.org/?page_id=40) suggests that I
should have change the priority of my sound card. Here's my
/proc/interrupts:
atte@ajstrup:~$ cat /proc/interrupts
CPU0
0: 2421490 XT-PIC timer
1: 11005 XT-PIC i8042
2: 0 XT-PIC cascade
7: 0 XT-PIC parport0
8: 5 XT-PIC rtc
9: 1587965 XT-PIC acpi
11: 3008807 XT-PIC uhci_hcd:usb1, uhci_hcd:usb2,
uhci_hcd:usb3, ehci_hcd:usb4, yenta, yenta, radeon@pci:0000:01:00.0,
Intel 82801DB-ICH4, ath0, eth0
12: 68364 XT-PIC i8042
14: 95065 XT-PIC ide0
15: 167883 XT-PIC ide1
NMI: 0
LOC: 0
ERR: 0
MIS: 0
And heres lspci:
atte@ajstrup:~$ lspci
0000:00:00.0 Host bridge: Intel Corporation 82855PM Processor to I/O
Controller (rev 03)
0000:00:01.0 PCI bridge: Intel Corporation 82855PM Processor to AGP
Controller (rev 03)
0000:00:1d.0 USB Controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) USB UHCI Controller #1 (rev 01)
0000:00:1d.1 USB Controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) USB UHCI Controller #2 (rev 01)
0000:00:1d.2 USB Controller: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) USB UHCI Controller #3 (rev 01)
0000:00:1d.7 USB Controller: Intel Corporation 82801DB/DBM (ICH4/ICH4-M)
USB2 EHCI Controller (rev 01)
0000:00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev 81)
0000:00:1f.0 ISA bridge: Intel Corporation 82801DBM (ICH4-M) LPC
Interface Bridge (rev 01)
0000:00:1f.1 IDE interface: Intel Corporation 82801DBM (ICH4-M) IDE
Controller (rev 01)
0000:00:1f.3 SMBus: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) SMBus Controller (rev 01)
0000:00:1f.5 Multimedia audio controller: Intel Corporation
82801DB/DBL/DBM (ICH4/ICH4-L/ICH4-M) AC'97 Audio Controller (rev 01)
0000:00:1f.6 Modem: Intel Corporation 82801DB/DBL/DBM
(ICH4/ICH4-L/ICH4-M) AC'97 Modem Controller (rev 01)
0000:01:00.0 VGA compatible controller: ATI Technologies Inc Radeon
Mobility M7 LW [Radeon Mobility 7500]
0000:02:00.0 CardBus bridge: Texas Instruments PCI4520 PC card Cardbus
Controller (rev 01)
0000:02:00.1 CardBus bridge: Texas Instruments PCI4520 PC card Cardbus
Controller (rev 01)
0000:02:01.0 Ethernet controller: Intel Corporation 82540EP Gigabit
Ethernet Controller (Mobile) (rev 03)
0000:02:02.0 Ethernet controller: Atheros Communications, Inc. AR5212
802.11abg NIC (rev 01)
So I have two soundcards, the onboard (82801DBDBL/DBM, from looking at
lspci) and an Edirol USB UA1A. It seems that alot of stuff is sharing
IRQ 11 (soundcard, usb, graphics card, ethernet, wlan and pcmcia). So my
questions is:
Would the way to go be to reassign usb and soundcard to their own
(shared?) IRQ?. How is this done and which IRQ should I go for?
--
peace, love & harmony
Atte
13 Aug
13 Aug
5:47 p.m.
On Sun, 2006-08-13 at 20:21 +0200, Atte André Jensen wrote:
So I have two soundcards, the onboard (82801DBDBL/DBM,
from looking at
lspci) and an Edirol USB UA1A. It seems that alot of stuff is sharing
IRQ 11 (soundcard, usb, graphics card, ethernet, wlan and pcmcia). So
my questions is:
Would the way to go be to reassign usb and soundcard to their own
(shared?) IRQ?.
Yes, that would be a good idea if it's possible.
How is this done and which IRQ should I go for?
If it's a laptop you are screwed - the interrupt sharing is hard wired.
If it's a normal PC, you can move devices to different PCI slots.
Lee
6:23 p.m.
Lee Revell wrote:
If it's a laptop you are screwed - the interrupt
sharing is hard wired.
I'm screwed :-(
There was something about PCI interrupts in the BIOS, maybe I'm totally
lucky (it's a thinkpad after all), will have a look.
Supposed the IRQ's are hardwired, Would it make sense to set the
priority of IRQ 11 high (like 82 as mentioned in the web page)? Might
get something else along with that, but, maybe it's better than nothing?
Also (while talking about priority); I have -P 70 set in qjackctl,
however I don't see that priority with anything. Here's a moment of top:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
7417 atte 16 0 150m 148m 21m R 20.3 14.7 1:09.79 ardour
7399 atte 16 0 35616 34m 19m S 6.0 3.4 0:22.13 ams.real
5233 atte 15 0 30484 28m 17m S 5.6 2.8 1:05.00 qjackctl
5242 atte 19 0 35728 34m 2556 S 4.0 3.5 0:44.81 jackd
7391 atte 15 0 45344 44m 8028 S 4.0 4.4 0:41.56 zynaddsubfx
1825 root -44 -5 0 0 0 S 1.7 0.0 0:15.75 IRQ 11
4670 root 15 0 1412 172 116 S 1.0 0.0 0:06.19 thinkpad-keys
7393 atte 15 0 46076 44m 16m S 1.0 4.5 0:06.69 seq24
4404 root 15 0 66272 17m 7184 S 0.7 1.7 0:26.13 Xorg
7392 atte 15 0 41168 40m 17m S 0.7 4.0 0:06.68 specimen
7 root -2 0 0 0 0 S 0.3 0.0 0:00.49
softirq-tasklet
1738 root -45 -5 0 0 0 S 0.3 0.0 0:00.60 IRQ 15
5261 atte 15 0 42360 16m 8644 S 0.3 1.7 0:05.72 xfce4-terminal
1 root 16 0 1568 528 460 S 0.0 0.1 0:01.19 init
2 root -2 0 0 0 0 S 0.0 0.0 0:00.00 softirq-high/0
3 root -2 0 0 0 0 S 0.0 0.0 0:04.05
softirq-timer/0
4 root -2 0 0 0 0 S 0.0 0.0 0:00.00
softirq-net-tx/
This is running 2.6.15-rt21. I guess it's the PR column we're talking
about, right? So almost all sound related should be higher, esp the IRQ
11 at -44. Where are the priorities for stuff like ardour and synths
set? How about the nice levels, are they ok and if not is the only
possibility to renice them? Also; looking at the mentioned web page, am
I supposed to call chrt once or on every boot?
Lot of questions, sorry...
--
peace, love & harmony
Atte
6:29 p.m.
On Sun, 2006-08-13 at 22:23 +0200, Atte André Jensen wrote:
Lee Revell wrote:
It's completely unpredictable what this will do. It might improve
things, it may make them worse.
If it's a laptop you are screwed - the
interrupt sharing is hard wired.
I'm screwed :-(
There was something about PCI interrupts in the BIOS, maybe I'm totally
lucky (it's a thinkpad after all), will have a look.
Supposed the IRQ's are hardwired, Would it make sense to set the
priority of IRQ 11 high (like 82 as mentioned in the web page)? Might
get something else along with that, but, maybe it's better than nothing?
Also (while talking about priority); I have -P 70 set
in qjackctl,
however I don't see that priority with anything. Here's a moment of top:
Because jackd is multithreaded but ps only reports the priority of one
thread.
Lee
6:32 p.m.
On Sun, 13 Aug 2006 16:29:57 -0400
Lee Revell <rlrevell(a)joe-job.com> wrote:
Because jackd is multithreaded but ps only reports the priority of one
thread.
htop is really nice for these things. it can sort for prio [and takes rt
prio into account] and has a nice ncurses interface :)
Flo
--
Palimm Palimm!
http://tapas.affenbande.org
10:41 p.m.
Lee Revell wrote:
It's completely unpredictable what this will do.
It might improve
things, it may make them worse.
Didn't do anything yet. It seems that going back to openbox solved a lot
of problem. I actually managed to work for hours without a simgle
dropout (a few incidents of jack dying when cpu was above 100%) and
finished my test production.
And I thought xfce4 was supposed to be light. Yeah right...
--
peace, love & harmony
Atte
6831
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linux-audio-user@lists.linuxaudio.org
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participants (3)
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Atte André Jensen -
Florian Paul Schmidt -
Lee Revell