[LAD] rtirq - previously Re: MidiSport vs. UA25

Arnout Engelen wrote: 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)