Date: Fri, 25 Oct 1996 15:30:49 -0600 From: Steve Passe <smp@csn.net> To: dg@root.com Cc: hackers@freefall.freebsd.org Subject: Re: ed0 timeouts Message-ID: <199610252130.PAA17264@clem.systemsix.com> In-Reply-To: Your message of "Fri, 25 Oct 1996 14:10:45 PDT." <199610252110.OAA08906@root.com>
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Hi, > I'd be VERY surprised if the problem was 8254 related. It sounds much more me too, I just mentioned it to be anal. >like a problem acking ISA interrupts, or perhaps a bug in the handling of >the interrupt masks. if it were a mask problem I would expect it to be more (always) prevelant, but I suppose that doesn't eliminate the possibility of a race condition on a mask. As I mentioned earlier all the other hardware is perfectly happy with this code: keyboard, disk controller, etc. Peter reports the floppy INTs work, don't know if the sio does or not... I was hoping someone would mention some problem with these boards and the INTA timing or somesuch thing. When STefan gets some "PCI black magic" fixed for me I will be able to substitute an SMP PCI Ultra. > Are you only having this problem when running two >processors, or does this also occur with just one? just 1, the 2nd CPU is in a "busy spin" waiting for "smp_active == 2". it shouldn't be able to grab INTs at this point. another clue is the fact that I used to have rand_irqs="-s 5 -s 10" set in /etc/sysconfig, at which time the problem occurred more often (by 'feel', no hard numbers to support this claim) I changed it to rand_irqs="NO" and frequency seemed to diminish greatly, maybe 1/4 of previous. -- Steve Passe | powered by smp@csn.net | FreeBSD -----BEGIN PGP PUBLIC KEY BLOCK----- Version: 2.6.2 mQCNAzHe7tEAAAEEAM274wAEEdP+grIrV6UtBt54FB5ufifFRA5ujzflrvlF8aoE 04it5BsUPFi3jJLfvOQeydbegexspPXL6kUejYt2OeptHuroIVW5+y2M2naTwqtX WVGeBP6s2q/fPPAS+g+sNZCpVBTbuinKa/C4Q6HJ++M9AyzIq5EuvO0a8Rr9AAUR tBlTdGV2ZSBQYXNzZSA8c21wQGNzbi5uZXQ+ =ds99 -----END PGP PUBLIC KEY BLOCK-----
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