[Glennbo]

I started thinking about rtirq and remembered setting it for my M-Audio cards. Well sure enough rtirq status reported that the M-Audio card still had a priority of 95, which I no longer need. There is only one M-Audio card in my machine now and it's set to be computer audio. The Intel audio is disabled in the bios.

I *think* IRQ 23 is the guy with my new USB sound device. Does this look correct?

I've had a few instances where sound gapped on me like to the tune of a quarter of a second pause, almost always while I had other stuff running like I have always done with the M-Audio cards. It did it once with nothing else running when I moved my mouse real fast across the screen and that's what made me remember rtirq.


So after searching the net I found one thread where a guy changed

RTIRQ_NAME_LIST="snd"

to

RTIRQ_NAME_LIST="ehci_hcd"

I tried it and here's what /proc/asound/cards comes back with now.

0 [NVidia ]: HDA-Intel - HDA NVidia
HDA NVidia at 0xfbcfc000 irq 17
1 [UMC1820 ]: USB-Audio - UMC1820
BEHRINGER UMC1820 at usb-0000:00:1d.0-1.1, high speed
2 [M2496 ]: ICE1712 - M Audio Audiophile 24/96
M Audio Audiophile 24/96 at 0xec00, irq 16


In particular the output from sudo /etc/init.d/rtirq status


PID CLS RTPRIO NI PRI %CPU STAT COMMAND
103 FF 95 - 135 0.0 S irq/16-ehci_hcd
104 FF 94 - 134 0.1 S irq/23-ehci_hcd
48 FF 50 - 90 0.0 S irq/9-acpi
106 FF 50 - 90 0.0 S irq/12-i8042
107 FF 50 - 90 0.0 S irq/1-i8042
108 FF 50 - 90 0.0 S irq/8-rtc0
179 FF 50 - 90 0.0 S irq/19-pata_jmi
186 FF 50 - 90 0.8 S irq/29-ahci[000
205 FF 50 - 90 0.0 S irq/18-ahci[000
524 FF 50 - 90 0.0 S irq/17-snd_hda_
528 FF 50 - 90 0.0 S irq/16-snd_ice1
939 FF 50 - 90 0.0 S irq/30-enp2s0
949 FF 50 - 90 0.0 S irq/31-nvidia
950 FF 49 - 89 0.0 S irq/31-s-nvidia
7 TS - 0 19 0.2 S ksoftirqd/0
17 TS - 0 19 0.2 S ksoftirqd/1
23 TS - 0 19 0.1 S ksoftirqd/2
29 TS - 0 19 0.2 S ksoftirqd/3


Here's the output from sudo cat /proc/interrupts


CPU0 CPU1 CPU2 CPU3
0: 112 0 0 0 IO-APIC 2-edge timer
1: 0 2 0 0 IO-APIC 1-edge i8042
8: 0 0 1 0 IO-APIC 8-edge rtc0
9: 0 121 0 0 IO-APIC 9-fasteoi acpi
12: 4 0 0 0 IO-APIC 12-edge i8042
16: 0 0 98 0 IO-APIC 16-fasteoi ehci_hcd:usb1, snd_ice1712
17: 0 0 715 0 IO-APIC 17-fasteoi snd_hda_intel:card0
18: 0 0 0 0 IO-APIC 18-fasteoi ahci[0000:03:00.0]
19: 0 0 134 138 IO-APIC 19-fasteoi pata_jmicron
23: 0 0 0 4446 IO-APIC 23-fasteoi ehci_hcd:usb2
24: 18204 0 0 0 HPET-MSI 2-edge hpet2
25: 0 16185 0 0 HPET-MSI 3-edge hpet3
26: 0 0 15964 0 HPET-MSI 4-edge hpet4
27: 0 0 0 21706 HPET-MSI 5-edge hpet5
29: 14570 0 0 0 PCI-MSI 512000-edge ahci[0000:00:1f.2]
30: 53 0 0 1240 PCI-MSI 1048576-edge enp2s0
31: 0 281 0 54 PCI-MSI 524288-edge nvidia
NMI: 11 10 10 14 Non-maskable interrupts
LOC: 86 71 63 55 Local timer interrupts
SPU: 0 0 0 0 Spurious interrupts
PMI: 11 10 10 14 Performance monitoring interrupts
IWI: 0 0 0 0 IRQ work interrupts
RTR: 1 0 0 0 APIC ICR read retries
RES: 5146 5632 8602 3739 Rescheduling interrupts
CAL: 7825 5729 5844 5573 Function call interrupts
TLB: 5814 3976 3800 4052 TLB shootdowns
TRM: 0 0 0 0 Thermal event interrupts
THR: 0 0 0 0 Threshold APIC interrupts
DFR: 0 0 0 0 Deferred Error APIC interrupts
MCE: 0 0 0 0 Machine check exceptions
MCP: 1 2 2 2 Machine check polls
HYP: 0 0 0 0 Hypervisor callback interruptssudo cat /proc/interrupts
ERR: 0
MIS: 0
PIN: 0 0 0 0 Posted-interrupt notification event
NPI: 0 0 0 0 Nested posted-interrupt event
PIW: 0 0 0 0 Posted-interrupt wakeup event