I wrote: > About 6 minutes after booting (on two occasions; I don't > guarantee that this doesn't vary), a process that appears > in the output of "ps" as "[swi4: clock sio]" begins to > use about 3/4 of the machine's CPU. I think it does so > more or less instantaneously. It continues to do so > indefinitely, so far as I can tell. [etc]
No ideas? I'm willing to help track this down, and the machine in question is sufficiently little used that I can do so without gross inconvenience; but I don't have enough FreeBSD kernel expertise to feel like diving in blind. * A little more information, in case it's useful to anyone: | $ echo; sysctl debug | egrep to_ | debug.to_avg_mpcalls: 2890 | debug.to_avg_mtxcalls: 0 | debug.to_avg_gcalls: 768 | debug.to_avg_depth: 3815 That's with HZ = 100. Here are some numbers from a message in freebsd-ia64, from Marcel Moolenaar, in 2004-07, to someone seeing symptoms like mine. They're meant to be typical healthy numbers. Mine above look somewhat worse, but not insanely so; surely not enough to explain the difference between using 0.3% cpu and using 75%. Marcel also had HZ=100. | % sysctl debug | grep to_avg | debug.to_avg_depth: 2500 | debug.to_avg_gcalls: 1003 | debug.to_avg_mpcalls: 1255 * It would be a shame if the only conclusion to be drawn from this were "sometimes a machine running FreeBSD is just 4x slower than it should be, and no one knows why". -- g _______________________________________________ email@example.com mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"