Adam Migus writes: > Folks, > While doing some performance analysis (doing make -j5 buildkernel) > on a set of 14 kernels I've hit one using the SCHED_ULE scheduler > that hangs. It happens every time but not necessarily in the same > place in the make. >
<...> > The hardware is a dual Xeon box. The kernel is SMP w/ SCHED_ULE > instead of SCHED_4BSD, the options required for diskless and the > following two options: You have machdep.hlt_logical_cpus: 1 in your sysctl output. [BTW, lots of people read this mail via the web archives at http://docs.freebsd.org/cgi/getmsg.cgi?fetch=1073654+0+current/freebsd-current, where its impossible to view mime; it would be MUCH better for us if appended things like stack traces and sysctl output rather then scrambling them for no reason] SCHED_ULE is incompatible with halting logical CPUs. Something about it does't know the core isn't running, so it schedules a job there which never runs, and then it gets confused. When I boot a 1 CPU P4 with an SMP kernel and machdep.hlt_logical_cpus=1, it hangs before making it to multiuser mode.. Try setting machdep.hlt_logical_cpus=0 (via sysctl now, and in /boot/loader.conf so it doesn't happen again). Drew _______________________________________________ [EMAIL PROTECTED] mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "[EMAIL PROTECTED]"