Date: Wed, 08 May 2002 11:25:31 +0200 From: "Stein M. Sandbech" <stein@ife.no> To: tlambert2@mindspring.com Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Loosing IRQs on a FreeBSD4.4 based server. Message-ID: <3CD8EF0B.3020702@ife.no> References: <200205080743.JAA15115@wopr.ife.no>
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Thanks for the prompt reply, here's some more info: > This really belongs on -question > Followups are directed there. OK > Erich Boleyn's SMP documentation indicates that if you are using > APIC I/O, you can lose ISA interrupts if they are masked at the > APIC, instead of at the ISA PIC. > > Since you aren't using SMP in your uniprocessor configuration, > the fact that you are using SMP hardware is, I think, not really > relevent to the problem you are seeing. > >>On an Intel SRMK2 1U PentiumIII server (ServerWorks LE >>chipset), we start loosing IRQs after a while, probably >>while running X11 and KDE on the system. After a while >>the machine ginds to a halt. > > If you do not use X11, do you have this problem? I can't > believe this would be it... but on really old video hardware, > interrupts were masked by the card itself to ensure updates > to non-dual ported video RAM would occur during the raster's > vertical retrace cycle. This avoided "sparklies" on the > screen. > > Because your kdeinit is an hour and 20 to an hour and 35 > minutes after the problem, according to your log message, it's > not really likely to be the problem (any problem related to > that would be limited to the initialization phase, I think, > though I do note that it's showing as a generic ISA VGA... an > old card). > > Does the problem occur without running KDE and X? You never > said, one way or the other. It does not seem to occur when not running X11 and KDE. But I can't say anything definitive yet (testing for an absense of errors is hard :-). I will increase the load on the system, and I will access the system from another machine. > Are you running NTP? If you turn it off, does the problem > go away? No, I do not run NTP, however I plan to, though. > Also, can you try 4.5-STABLE instead? Soren made a lot of > fixes to the ATA code, including tagged commands. Not sure > what would account for the FXP problems. That would be the next step, yes. I still want to run some stress tests over the next couple of weeks without X11/KDE. Question: Is the ATA code active when I've disabled both IDE controllers (both in BIOS and kernel config), and the system is strictly SCSI based? > Finally, I'll note that your fxp0 is sharing IRQ 10 with your > USB hardware. That may not be a good thing. Try disabiling > it and/or unplugging anything that's plugged in there, like the > hub it looks like it's finding... That's, funny. The machine have no USB devices connected. I must check the kernel configuration file though, can't remember what I've done there regarding USB. Intel mentions in a Tech Update for the system, that it is impossible to select "Legacy USB...enable/disable" in the (our) current BIOS release. They have fixed it in the newest release. My guess is that legacy USB support is no issue in this context, though. I should probably update the BIOS anyways. Another pice of information which I forgot in my first post. Initially the machine had another Adaptech SCSI controller (an AHA2940UW with a narrow SCSI connector externally) for the external tape streamer, and I cannot remember that we had one single hang/crash in that period (ca 1 month). Now the streamer is connected to the 68pin micro SCSI connector on the integrated SCSI controller. I have of course removed the Adaptec. Again thank you again for your feedback, I really appreciate it! > > -- Terry -- Stein Morten /* Stein M Sandbech Email: stein@wopr.ife.no ** ** Owner & technical manager ** ** Ing. Stein M. Sandbech Phone: +47 6380 6219 ** ** Phone: +47 6387 2320 ** ** Asaktoppen 39, N-2015 Leirsund, NORWAY Fax: +47 6387 2300 */ To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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