Date: Mon, 19 May 2003 13:08:17 -0700 From: Lars Eggert <larse@ISI.EDU> To: Dan Nelson <dnelson@allantgroup.com> Cc: current@freebsd.org Subject: Re: Interrupt latency problems Message-ID: <3EC939B1.8020606@isi.edu> In-Reply-To: <20030519200002.GE39543@dan.emsphone.com> References: <20030511.143231.133432780.imp@bsdimp.com> <1052692357.4921.128.camel@cf.freebsd-services.com> <16062.59918.302092.929640@curly.cs.duke.edu> <1052703871.4921.146.camel@cf.freebsd-services.com> <16063.38255.961273.900146@grasshopper.cs.duke.edu> <20030512124753.GA48753@survey.codeburst.net> <16063.39366.930707.980678@grasshopper.cs.duke.edu> <20030512130949.GB48440@survey.codeburst.net> <1053372251.815.50.camel@cf.freebsd-services.com> <3EC93331.7090004@isi.edu> <20030519200002.GE39543@dan.emsphone.com>
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Dan Nelson wrote:
> In the last episode (May 19), Lars Eggert said:
>
>>Paul Richards wrote:
>>
>>>I'm also not sure why a lot more people aren't seeing this, unless
>>>my motherboard is odd in sharing the acpi interrupt with a pci
>>>slot.
>>
>>I tried to see if this is the case on my SMP board, but I don't seem
>>to have acpi attached to any interrupt:
>>
>>[root@nik: ~] ps -axg | grep irq
>> 24 ?? WL 0:00.00 (irq18: mpt0)
>> 25 ?? WL 0:19.30 (irq19: em0 mpt1)
>> 26 ?? WL 0:00.00 (irq16: xl0 uhci1)
>> 27 ?? WL 1:57.07 (irq17: fwohci0 drm0)
>> 28 ?? WL 1:09.27 (irq13: em1 ichsmb0)
>> 29 ?? WL 0:00.02 (irq20: pcm0)
>> 30 ?? WL 0:02.19 (irq2: uhci0 bktr0)
>> 31 ?? WL 0:02.84 (irq14: ata0)
>> 32 ?? WL 0:00.00 (irq15: ata1)
>> 36 ?? WL 0:00.00 (irq6: fdc0)
>> 37 ?? WL 0:00.00 (irq1: atkbd0)
>>
>>Is this the right way to check for this?
>
>
> You sure you have acpi loaded? It shows up for me:
>
> $ ps ax | grep acpi0
> 22 ?? WL 0:00.00 (irq9: acpi0)
I'm pretty sure I do - maybe acpi irq handling is different with an SMP
kernel?
[larse@nik: ~] ps ax | grep acpi
5 ?? IL 0:00.00 (acpi_task0)
6 ?? IL 0:00.00 (acpi_task1)
7 ?? IL 0:00.00 (acpi_task2)
78714 p4 LV+ 0:00.00 grep acpi (tcsh)
[larse@nik: ~] kldstat | grep acpi
46 1 0xc068b000 48514 acpi.ko
[larse@nik: ~] grep -i acpi /var/run/dmesg.boot
Preloaded elf module "/boot/kernel/acpi.ko" at 0xc06d6fa8.
Features=0x3febfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM>
acpi0: <DELL WS 530 > on motherboard
acpi0: power button is handled as a fixed feature programming model.
Timecounter "ACPI-fast" frequency 3579545 Hz
acpi_timer0: <24-bit timer at 3.579545MHz> port 0x808-0x80b on acpi0
acpi_cpu0: <CPU> on acpi0
acpi_cpu1: <CPU> on acpi0
acpi_cpu2: <CPU> on acpi0
acpi_cpu3: <CPU> on acpi0
<...>
> Maybe the attach message to acpi should print the IRQ it's using. All
> I get in dmesg is "acpi0: <ASUS CUV4X-D > on motherboard".
Lars
--
Lars Eggert <larse@isi.edu> USC Information Sciences Institute
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