smp on dell poweredge freeze: 5.4 p7

[rvenne at dental-on-line.fr]

hi list

since I make installworld to upgrade to p7, my os freeze often enough.

FreeBSD xxxxxxx 5.4-RELEASE-p7 FreeBSD 5.4-RELEASE-p7

kern.timecounter.smp_tsc: 0
kern.smp.maxcpus: 16
kern.smp.active: 1
kern.smp.disabled: 0
kern.smp.cpus: 4
kern.smp.forward_signal_enabled: 1
kern.smp.forward_roundrobin_enabled: 1
debug.psmpkterrthresh: 2

sysctl -a | grep machdep.hyperthreading_allowed
machdep.hyperthreading_allowed: 0

please help