On 07-Nov-2003 Jens Rehsack wrote: > Hi, > > I recompiled my system today and when it came up again, > it was terrible slow. Using top I've seen, that there're > around 25% cpu-time is used to handle interrupts. > The kernel was configured using SMP ('cause it's a HTT > enabled CPU) and APIC. Setting machdep.hlt_logical_cpus > to 1 didn't change anything. Simply getting a few mails > (around 30) takes about 20 minutes. Most of time while > getting the mails my mozilla was in "*Giant" state, > what shouldn't be good, should it? > > I've recompiled the kernel without SMP and APIC and > now the system's behaviour is more "normal". Is the > behaviour of the new interrupt code better on real > multiprocessor systems? Can you do a 'vmstat -i' under your SMP kernel to see where all the interrupts are coming from? It sounds like a device is interrupt storming. There has been report of this so far with fwohci(4). -- John Baldwin <jhb_at_FreeBSD.org> <>< http://www.FreeBSD.org/~jhb/ "Power Users Use the Power to Serve!" - http://www.FreeBSD.org/Received on Fri Nov 07 2003 - 10:06:00 UTC
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