APIC errors
Just switched to 2.4.0-ac9 (+crypto patches) on our Dual-Pentium MMX webserver yesterday. Works fine so far, except i keep seeing those APIC erros (about 14 in 12 hrs) indicating receive, send and CS errors.
Should i be concerned?
Yours,
Dominik Kubla
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Quoted 5 lines · Dominik Kubla
Just switched to 2.4.0-ac9 (+crypto patches) on our Dual-Pentium MMX webserver yesterday. Works fine so far, except i keep seeing those APIC erros (about 14 in 12 hrs) indicating receive, send and CS errors.
Should i be concerned?
At this volume I would treat this as a warning but not a critical issue.
Inter-APIC messages get retransmitted in case of an error, but the checksum circuit is not sophisticated -- a double-bit error might pass unnoticed leading to a system unstability under certain conditions. At such a low volume of errors double-bit ones are not likely to happen.
It's the first report of APIC errors on a P5 system I have seen, so it's
probably not a result of a bad motherboard design. I'd recommend to check if the system doesn't get overheated. You may also be unlucky to have a faulty board.
Maciej
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+ Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: [email protected], PGP key available + - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] Please read the FAQ at http://www.tux.org/lkml/
Quoted 15 lines · Maciej W. Rozycki
Quoted 5 lines · Dominik Kubla
Just switched to 2.4.0-ac9 (+crypto patches) on our Dual-Pentium MMX webserver yesterday. Works fine so far, except i keep seeing those APIC erros (about 14 in 12 hrs) indicating receive, send and CS errors.
Should i be concerned?
At this volume I would treat this as a warning but not a critical issue.
Inter-APIC messages get retransmitted in case of an error, but the checksum circuit is not sophisticated -- a double-bit error might pass unnoticed leading to a system unstability under certain conditions. At such a low volume of errors double-bit ones are not likely to happen.
Quoted 7 lines
It's the first report of APIC errors on a P5 system I have seen, so it's
probably not a result of a bad motherboard design. I'd recommend to check if the system doesn't get overheated. You may also be unlucky to have a faulty board.Maciej
Hey, it's not the first, some time ago when it began to be reported a lot of people with various systems asked at the same time about the same thing :)
I have a dual p200mmx in a Gigabyte 586DX mobo with 96Mb + Voodoo 3 2000pci, Realtek 8139 nic, bt848 tv...
And I usually get a lot of these messages:
[coma@quartz coma]$ cat /proc/interrupts
CPU0 CPU1
0: 801148 819848 IO-APIC-edge timer 1: 7576 7691 IO-APIC-edge keyboard 2: 0 0 XT-PIC cascade 5: 0 4 IO-APIC-edge soundblaster 8: 1 0 IO-APIC-edge rtc 9: 4358 4347 IO-APIC-edge eth1 12: 124492 126503 IO-APIC-edge PS/2 Mouse 14: 206324 201592 IO-APIC-edge ide0 15: 1593094 1593085 IO-APIC-edge ide1 17: 785989 785945 IO-APIC-level eth0 18: 402 433 IO-APIC-level bttv NMI: 1620906 1620904 LOC: 1620963 1620962 ERR: 2697
[coma@quartz coma]$ uptime
8:14pm up 4:30, 0 users, load average: 0.19, 0.11, 0.09
but my system works ok, mostly, now I have just upgraded a Realtek 8029 (10Mb) because it gets hung to a Realtek 8139 (100Mb) just to found the mobo has some kind of busmastering problems, but that's another story.
P.D. And as you suggested it runs very hot, about 50ºC at the cpus when both are at full use.
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Jorge Nerin <[email protected]> - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] Please read the FAQ at http://www.tux.org/lkml/
Quoted 8 lines · Jorge Nerin
Quoted 4 lines
It's the first report of APIC errors on a P5 system I have seen, so it's
probably not a result of a bad motherboard design. I'd recommend to check if the system doesn't get overheated. You may also be unlucky to have a faulty board.Hey, it's not the first, some time ago when it began to be reported a lot of people with various systems asked at the same time about the same thing :)
I've seen a lot of reports but they were from P6 systems' owners.
Quoted 4 lines
LOC: 1620963 1620962 ERR: 2697[coma@quartz coma]$ uptime
8:14pm up 4:30, 0 users, load average: 0.19, 0.11, 0.09
This rate of errors is alarming. You get an error every six seconds on
the average.
Quoted 3 lines
but my system works ok, mostly, now I have just upgraded a Realtek 8029 (10Mb) because it gets hung to a Realtek 8139 (100Mb) just to found the mobo has some kind of busmastering problems, but that's another story.
The hangs might actually be a result of interrupt delivery problems (just
as other people report).
Quoted 2 lines
P.D. And as you suggested it runs very hot, about 50şC at the cpus when both are at full use.
Well, 50 degrees is not that hot -- CPUs are actually speced for up to 70
degrees ambient temperature (that means the maximum temperature of the case, not the heatsink!), but you need to ensure proper cooling.
After one and a half year since the error reporting is enabled I have yet
to see a hardware error to be reported by an APIC in my system.
Maciej
Signature · 9 lines
+ Maciej W. Rozycki, Technical University of Gdansk, Poland + +--------------------------------------------------------------+ + e-mail: [email protected], PGP key available + - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] Please read the FAQ at http://www.tux.org/lkml/
Quoted 3 lines · Dominik Kubla
Just switched to 2.4.0-ac9 (+crypto patches) on our Dual-Pentium MMX webserver yesterday. Works fine so far, except i keep seeing those APIC erros (about 14 in 12 hrs) indicating receive, send and CS errors.
Make sure your system is free of dust...dust can cause small errors like this to occur. Also make sure that the temperature of the system is within tolerable levels. Also, a capacitor on your motherboard could be failing...there are many different things that could cause this error.
Quoted 1 line
Should i be concerned?
Probably not. The errors were there before yo upgraded the kernel; they just weren't reported. Those messages are merely letting you know that an APIC retry happened. The message still got to the controller; it just had to get sent twice.
good luck,
-kelsey
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