Rui Sousa <rui.p.m.sousa@clix.pt> writes:
>
> The current emu10k1 driver uses a hardware clock to generate periodic
> interrupts. These apparently ran at the wrong rate in some Alpha machines.
> It's possible that the same problem occur now with more recent i386
> machines.
>
Hi!
Sorry to quote a really old email. :)
I'm currently investigating why is my emu10k1 doing so much
interrupts. They are so frequent that they usually show on a kernel
profile report on the top, no matter what I've been doing with the
poor machine (interrupts are there even if I'm not using my
Soundblaster live).
Kernel is the most recent 2.5.x. dmesg says:
Creative EMU10K1 PCI Audio Driver, version 0.16, 16:17:32 Dec 9 2001
emu10k1: EMU10K1 rev 6 model 0x8027 found, IO at 0xc400-0xc41f, IRQ 10
ac97_codec: AC97 Audio codec, id: 0x8384:0x7609 (SigmaTel STAC9721/23)
This is my /proc/interrupts:
CPU0 CPU1
0: 423348 425806 IO-APIC-edge timer
1: 13674 13371 IO-APIC-edge keyboard
2: 0 0 XT-PIC cascade
8: 2 1 IO-APIC-edge rtc
10: 5956299 5956064 IO-APIC-level EMU10K1 <===========
11: 19803 20033 IO-APIC-level ide2
12: 104203 101822 IO-APIC-edge PS/2 Mouse
14: 4356 4285 IO-APIC-edge ide0
15: 7 9 IO-APIC-edge ide1
NMI: 0 0
LOC: 849167 849165
ERR: 2
MIS: 0
Yes, this is a SMP machine, but I don't know why would that make any
difference. As you can see, number of emu10k1 interrupts is enormous
(I also tried noapic, no changes).
procinfo -d quickly shows that emu10k1 is generating ~1412 interrupts
per second (7060/2).
irq 0: 500 timer irq 10: 7060 EMU10K1
irq 1: 1 keyboard irq 11: 10 ide2
irq 2: 0 cascade [4] irq 12: 164 PS/2 Mouse
irq 3: 0 irq 14: 2 ide0
irq 4: 0 irq 15: 0 ide1
irq 8: 0 rtc
Is that the periodic hardware interrupt you're talking about, and why
are there so many interrupts? Is there a way to stop that storm?
Regards,
-- Zlatko - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
This archive was generated by hypermail 2b29 : Sat Dec 15 2001 - 21:00:15 EST