Oliver Pinter
2013-Nov-05 14:07 UTC
[10-STABLE, 11-CURRENT] something wrong between cam and eventtimer or geom and eventtimer
Hi all! The machine is a Haswell machine, the disc performance was very poor (20-30MByte/sec). When I change the kern.eventtimer.idletick from 0 to 1, the normal performance restored back to normal (70-90MByte/sec). The default eventtimer was LAPIC. On other machine Q9300, this was fully reproducible.
Adrian Chadd
2013-Nov-05 14:53 UTC
[10-STABLE, 11-CURRENT] something wrong between cam and eventtimer or geom and eventtimer
Hi! Can you do 'sysctl dev.cpu' please? I'd like to see what sleep state(s) your CPU is entering. Thanks! -adrian On 5 November 2013 06:07, Oliver Pinter <oliver.pntr at gmail.com> wrote:> Hi all! > > The machine is a Haswell machine, the disc performance was very poor > (20-30MByte/sec). > When I change the kern.eventtimer.idletick from 0 to 1, the normal > performance restored back to normal (70-90MByte/sec). > > The default eventtimer was LAPIC. > > On other machine Q9300, this was fully reproducible. > _______________________________________________ > freebsd-current at freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-current > To unsubscribe, send any mail to "freebsd-current-unsubscribe at freebsd.org"