On Tuesday 06 February 2007 03:34, Ludger Bolmerg wrote: > > > -----Ursprüngliche Nachricht----- > > > > Hi > > > > > > I installed FreeBSD 6.2 on a Fujitsu Siemens TX600 S3 with 2 dual core > > > Xeon processors and 4G RAM. > > > > > > The SMP kernel is awfully slow. make buildkernel takes about 6 hours to > > > complete. When I boot a UP kernel the build completes within 12 > > > minutes. I don't see any unusual message in any log file. > > > > Can you run top and see what the system is doing? That sounds very odd. > > If > > you boot the SMP kernel with 'kern.smp.disabled=1' set via the loader is it > > still really slow? > > Booting the SMP kernel with kern.smp.disabled=1 shows good performance values.
Ok, can you try leaving SMP enabled but disabling specific cores instead. You do this via the APIC ID like so: hint.lapic.10.disabled=1 Don't disable the BSP (I think it's ignored), and I would try disabling all 3 AP's at first and then enable the CPUs one a time to compare having 2 CPUs vs 3 CPUs vs 4 CPUs. -- John Baldwin _______________________________________________ [email protected] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-smp To unsubscribe, send any mail to "[EMAIL PROTECTED]"
