On 05/25/2011 07:48 PM, Emanuel Rumpf wrote:
> 2011/5/25 Robin Gareus <robin@email-addr-hidden>:
>>
>> You need to add 'threadirqs' to the kernel-boot option to enable
>> threaded IRQ handlers with 2.6.39.
>>
> Things have changed, I'm not quite sure how to do that these days.
> Add it to GRUB_CMDLINE_LINUX_DEFAULT in /etc/default/grub ? ? ?
Yes, but it depends on your bootloader and distro.
I use GRUB_CMDLINE_LINUX="i915.modeset=1 threadirqs"
in /etc/default/grub. run `sudo update-grub` after saving changes to
that file.
If you install the kernel as debian package the 'update-grub' part is
taken care of by dpkg's postinst script.
>> I'm waiting for feedback from Daniel about a 2.6.39 kernel for
>> openDAW/64studio. Stay tuned.
>>
>> The .config I'm currently using successfully on i386 thinkpad X60s is:
>> http://rg42.org/_media/wiki/kernel/config-2.6.39.gz
>>
> Thanks.
>
> There's a tool called irqbalance
> Running that, is it still recommended with threadirqs ?
I don't know. I do run irqbalance here; but it does not seem to have
effect on hardware-irqs [anymore] (see dumps below).
But I'm getting off-topic.
There are no crackles nor xruns here with and without irqbalance.
jackd2-svn-r4393, The UA-25 is on IRQ 18;
Are your crackles gone with the 'threadirqs' option?
robin
# cat /proc/interrupts
CPU0 CPU1
0: 278696424 6 IO-APIC-edge timer
1: 765597 0 IO-APIC-edge i8042
8: 1 0 IO-APIC-edge rtc0
9: 19624127 0 IO-APIC-fasteoi acpi
12: 9265100 0 IO-APIC-edge i8042
14: 2635256 4 IO-APIC-edge ata_piix
15: 0 0 IO-APIC-edge ata_piix
16: 1238945 0 IO-APIC-fasteoi yenta, uhci_hcd:usb2,
i915@email-addr-hidden:0000:00:02.0
17: 6413 0 IO-APIC-fasteoi uhci_hcd:usb3, firewire_ohci
18: 2273102 2 IO-APIC-fasteoi uhci_hcd:usb4, mmc0
19: 7270696 23 IO-APIC-fasteoi ehci_hcd:usb1, uhci_hcd:usb5
40: 0 0 PCI-MSI-edge PCIe PME
41: 0 0 PCI-MSI-edge PCIe PME
42: 0 0 PCI-MSI-edge PCIe PME
43: 0 0 PCI-MSI-edge PCIe PME
44: 8880802 38 PCI-MSI-edge hda_intel
45: 20916424 16 PCI-MSI-edge iwl3945
NMI: 2647 2909 Non-maskable interrupts
LOC: 77842296 233977838 Local timer interrupts
SPU: 0 0 Spurious interrupts
PMI: 2647 2909 Performance monitoring interrupts
IWI: 0 0 IRQ work interrupts
RES: 85016190 124517149 Rescheduling interrupts
CAL: 332967 582697 Function call interrupts
TLB: 849663 604581 TLB shootdowns
TRM: 12 12 Thermal event interrupts
THR: 0 0 Threshold APIC interrupts
MCE: 0 0 Machine check exceptions
MCP: 1144 1124 Machine check polls
ERR: 0
MIS: 0
# cat /proc/softirqs
CPU0 CPU1
HI: 71 0
TIMER: 78744168 77532112
NET_TX: 93266 813476
NET_RX: 104790 97888
BLOCK: 1482548 3411882
BLOCK_IOPOLL: 71 0
TASKLET: 10734408 19778443
SCHED: 4012801 4799134
HRTIMER: 215170 248879
RCU: 21928395 24010120
# /etc/init.d/rtirq status
PID CLS RTPRIO NI PRI %CPU STAT COMMAND
970 FF 88 - 128 0.0 S irq/18-uhci_hcd
317 FF 84 - 124 0.2 S irq/44-hda_inte
610 FF 80 - 120 0.0 S irq/1-i8042
609 FF 79 - 119 0.0 S irq/12-i8042
159 FF 50 - 90 0.1 S irq/9-acpi
318 FF 50 - 90 0.0 S irq/18-mmc0
321 FF 50 - 90 0.0 S irq/16-i915@email-addr-hidden
322 FF 50 - 90 0.0 S irq/17-firewire
443 FF 50 - 90 0.0 S irq/40-PCIe PME
444 FF 50 - 90 0.0 S irq/41-PCIe PME
445 FF 50 - 90 0.0 S irq/42-PCIe PME
446 FF 50 - 90 0.0 S irq/43-PCIe PME
569 FF 50 - 90 0.0 S irq/14-ata_piix
570 FF 50 - 90 0.0 S irq/15-ata_piix
589 FF 50 - 90 0.0 S irq/16-yenta
929 FF 50 - 90 0.0 S irq/8-rtc0
963 FF 50 - 90 0.0 S irq/19-ehci_hcd
967 FF 50 - 90 0.0 S irq/16-uhci_hcd
969 FF 50 - 90 0.0 S irq/17-uhci_hcd
972 FF 50 - 90 0.0 S irq/19-uhci_hcd
29970 FF 50 - 90 0.5 S irq/45-iwl3945
3 TS - 0 19 0.1 S ksoftirqd/0
315 TS - 0 19 0.2 S ksoftirqd/1
3620 TS - -20 39 0.0 S< kvm-irqfd-clean
24746 TS - 0 19 0.0 S+ rtirq
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Received on Thu May 26 00:15:04 2011
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