Re: [LAU] 1. Linux-Rt and TSC - 2. Linux-Rt and IRQ allocation

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To: Clemens Ladisch <clemens@...>
Cc: linux-audio-user <linux-audio-user@...>
Date: Monday, January 27, 2014 - 5:26 pm

On Wed, 2014-01-22 at 18:56 +0100, Clemens Ladisch wrote:

Hi Clemens,

Im not absolutely sure if the 3.2 kernels already gave the graphics it's
own IRQ on my machine, when I used them a long time ago, but AFAIR those
kernels already did, at least the IRQ was displayed by commands that
should show the IRQ, but now something is fishy.

The graphics even isn't listed in /proc/interrupts for the Debian
3.2.0-4-rt-686-pae. Today I build a 3.8.13-rt14-pae kernel that is ok.

rocketmouse@debi386:~$ uname -a
Linux debi386 3.8.13-rt14-pae-rocketmouse-2 #1 SMP PREEMPT RT Mon Jan 27 15:47:47 CET 2014 i686 GNU/Linux
rocketmouse@debi386:~$ /etc/init.d/rtirq status

PID CLS RTPRIO NI PRI %CPU STAT COMMAND
39 FF 90 - 130 0.0 S irq/8-rtc0
644 FF 85 - 125 0.0 S irq/18-snd_hdsp
646 FF 80 - 120 0.0 S irq/20-snd_ice1
650 FF 79 - 119 0.0 S irq/21-snd_ice1
631 FF 75 - 115 0.0 S irq/19-ehci_hcd
632 FF 75 - 115 0.0 S irq/16-ohci_hcd
634 FF 74 - 114 0.5 S irq/17-ohci_hcd
649 FF 73 - 113 0.2 S irq/17-ohci_hcd
38 FF 70 - 110 0.0 S irq/1-i8042
27 FF 50 - 90 0.0 S irq/9-acpi
126 FF 50 - 90 0.6 S irq/22-ahci
569 FF 50 - 90 0.0 S irq/7-parport0
621 FF 50 - 90 0.0 S irq/22-firewire
623 FF 50 - 90 0.0 S irq/43-radeon
625 FF 50 - 90 0.0 S irq/14-pata_ati
626 FF 50 - 90 0.0 S irq/15-pata_ati
642 FF 50 - 90 0.0 S irq/18-ohci_hcd
651 FF 50 - 90 0.0 S irq/18-ohci_hcd
1883 FF 50 - 90 0.0 S irq/42-eth0
3 FF 1 - 41 0.1 S ksoftirqd/0
15 FF 1 - 41 0.2 S ksoftirqd/1

rocketmouse@debi386:~$ ls /proc/irq/* | grep radeon
radeon
rocketmouse@debi386:~$ ls /proc/irq/43 | grep radeon
radeon
rocketmouse@debi386:~$ sudo lshw -c video | grep irq
resources: irq:43 memory:d0000000-dfffffff memory:fdff0000-fdffffff ioport:ce00(size=256) memory:fde00000-fdefffff

rocketmouse@debi386:~$ uname -a
Linux debi386 3.2.0-4-rt-686-pae #1 SMP PREEMPT RT Debian 3.2.51-1 i686 GNU/Linux
rocketmouse@debi386:~$ /etc/init.d/rtirq status

PID CLS RTPRIO NI PRI %CPU STAT COMMAND
36 FF 90 - 130 0.0 S irq/8-rtc0
623 FF 85 - 125 0.0 S irq/18-snd_hdsp
634 FF 80 - 120 0.0 S irq/20-snd_ice1
638 FF 79 - 119 0.0 S irq/21-snd_ice1
560 FF 75 - 115 0.0 S irq/19-ehci_hcd
569 FF 75 - 115 0.0 S irq/16-ohci_hcd
570 FF 74 - 114 0.0 S irq/17-ohci_hcd
586 FF 73 - 113 0.0 S irq/17-ohci_hcd
34 FF 70 - 110 0.0 S irq/1-i8042
24 FF 50 - 90 0.0 S irq/9-acpi
129 FF 50 - 90 0.3 S irq/22-ahci
561 FF 50 - 90 0.0 S irq/22-firewire
565 FF 50 - 90 0.0 S irq/14-pata_ati
566 FF 50 - 90 0.0 S irq/15-pata_ati
574 FF 50 - 90 0.0 S irq/18-ohci_hcd
593 FF 50 - 90 0.0 S irq/7-parport0
594 FF 50 - 90 0.0 S irq/18-ohci_hcd
1855 FF 50 - 90 0.0 S irq/42-eth0
3 FF 1 - 41 0.1 S ksoftirqd/0
13 FF 1 - 41 0.1 S ksoftirqd/1

rocketmouse@debi386:~$ ls /proc/irq/* | grep radeon
rocketmouse@debi386:~$ sudo lshw -c video | grep irq
resources: irq:18 memory:d0000000-dfffffff memory:fdff0000-fdffffff ioport:ce00(size=256) memory:fde00000-fdefffff

Regards,
Ralf

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Re: [LAU] 1. Linux-Rt and TSC - 2. Linux-Rt and IRQ allocation, Ralf Mardorf, (Mon Jan 27, 5:26 pm)