Arnout Engelen wrote:
> I haven't looked into rtirq yet (I really should), but if I understand
> correctly rtirq does automatically what I did manually: find out which IRQ
> the device you're interested in is connected to, and give that IRQ a
> higher rtprio.
>
> To see the current rtprio's of your IRQ's, do:
>
> ps axHo user,lwp,pid,rtprio,ni,command | grep irq
>
> To increase the rtprio of some irq manually:
>
> chrt -f -p <prio> <pid>
This is from my rtirq: "RTIRQ_NAME_LIST="rtc snd usb3 i8042"" RTC seems
to be IRQ-8, the sound card is IRQ-21 and the USB MIDI device is IRQ-17.
Why are there IRQ-1 and IRQ-12 having higher rtprio than USB?
Is "usb3" for rtirq correct for "SysFS ID: /devices/[snip]/usb2/[snip]?
There seems to be no usb0, that's why I guess it's wrong, but I guess
Rui once has written "usb3".
Is there a reason not to give usb3 a higher rtprio than snd, at least
when I only need a sequencer?
How can I see which devices do use what IRQ? Perhaps IRQ-17 is used by
other devices too.
$ ps axHo user,lwp,pid,rtprio,ni,command | grep IRQ
root 104 104 50 - [IRQ-9]
root 402 402 74 - [IRQ-12]
root 403 403 75 - [IRQ-1]
root 411 411 90 - [IRQ-8]
root 971 971 50 - [IRQ-16]
root 992 992 50 - [IRQ-17] *USB MIDI device*
root 1021 1021 80 - [IRQ-19]
root 1028 1028 50 - [IRQ-22]
root 1383 1383 50 - [IRQ-18]
root 1521 1521 50 - [IRQ-14]
root 2082 2082 50 - [IRQ-7]
root 2101 2101 50 - [IRQ-25]
root 2369 2369 85 - [IRQ-21] *Sound card*
root 4302 4302 50 - [IRQ-4]
1000 14174 14174 - 0 grep IRQ
------------------------------------------------------------------------
*Only Swissonic MIDI USB device is connected*
$ hwinfo --usb
01: USB 00.0: 10a00 Hub
[snip]
02: USB 00.0: 10a00 Hub
[snip]
03: USB 00.0: 10a00 Hub
[snip]
04: USB 00.0: 0000 Unclassified device
[Created at usb.122]
UDI: /org/freedesktop/Hal/devices/usb_device_170b_11_noserial_if0
Unique ID: FKGF.HOkU9LTmHW8
Parent ID: pBe4.PaupGMfzSp8
SysFS ID: /devices/pci0000:00/0000:00:13.1/usb2/2-1/2-1:1.0
SysFS BusID: 2-1:1.0
Hardware Class: unknown
Model: "Unclassified device"
Hotplug: USB
Vendor: usb 0x170b
Device: usb 0x0011
Revision: "0.01"
Driver: "snd-usb-audio"
Driver Modules: "snd_usb_audio"
Speed: 12 Mbps
Module Alias: "usb:v170Bp0011d0001dc00dsc00dp00ic01isc03ip00"
Driver Info #0:
Driver Status: snd_usb_audio is active
Driver Activation Cmd: "modprobe snd_usb_audio"
Config Status: cfg=new, avail=yes, need=no, active=unknown
Attached to: #6 (Hub)
05: USB 00.0: 10a00 Hub
[snip]
06: USB 00.0: 10a00 Hub
[snip]
07: USB 00.0: 10a00 Hub
[snip]
hwinfo --usb-ctrl
[snip]
24: PCI 13.1: 0c03 USB Controller (OHCI)
[Created at pci.296]
UDI: /org/freedesktop/Hal/devices/pci_1002_4388
Unique ID: 9n5e.Z94ELKUtK5C
SysFS ID: /devices/pci0000:00/0000:00:13.1
SysFS BusID: 0000:00:13.1
Hardware Class: usb controller
Model: "ASUSTeK USB Controller"
Vendor: pci 0x1002 "ATI Technologies Inc"
Device: pci 0x4388
SubVendor: pci 0x1043 "ASUSTeK Computer Inc."
SubDevice: pci 0x81ef
Driver: "ohci_hcd"
Driver Modules: "ohci_hcd"
Memory Range: 0xfe02d000-0xfe02dfff (rw,non-prefetchable)
IRQ: 17 (29 events)
Module Alias: "pci:v00001002d00004388sv00001043sd000081EFbc0Csc03i10"
Driver Info #0:
Driver Status: ohci-hcd is active
Driver Activation Cmd: "modprobe ohci-hcd"
Config Status: cfg=new, avail=yes, need=no, active=unknown
[snip]
------------------------------------------------------------------------
$ hwinfo --sound
09: PCI 306.0: 0401 Multimedia audio controller
[Created at pci.296]
UDI: /org/freedesktop/Hal/devices/pci_1412_1712
Unique ID: Kaa7.J4wu6rKmng4
Parent ID: qscc.ULOo3yhA66C
SysFS ID: /devices/pci0000:00/0000:00:14.4/0000:03:06.0
SysFS BusID: 0000:03:06.0
Hardware Class: sound
Model: "TERRATEC EWX 24/96"
Vendor: pci 0x1412 "VIA Technologies Inc."
Device: pci 0x1712 "ICE1712 [Envy24] PCI Multi-Channel I/O Controller"
SubVendor: pci 0x153b "TERRATEC Electronic GmbH"
SubDevice: pci 0x1130 "EWX 24/96"
Revision: 0x02
Driver: "ICE1712"
Driver Modules: "snd_ice1712"
I/O Ports: 0xcf00-0xcf1f (rw)
I/O Ports: 0xce00-0xce0f (rw)
I/O Ports: 0xcd00-0xcd0f (rw)
I/O Ports: 0xcc00-0xcc3f (rw)
IRQ: 21 (26376 events)
Module Alias: "pci:v00001412d00001712sv0000153Bsd00001130bc04sc01i00"
Driver Info #0:
Driver Status: snd_ice1712 is active
Driver Activation Cmd: "modprobe snd_ice1712"
Config Status: cfg=new, avail=yes, need=no, active=unknown
Attached to: #16 (PCI bridge)
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Received on Sun Sep 27 00:15:01 2009
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