bizarre performance issues in 6.2 release

garcol at garcol at
Sat Feb 17 08:53:13 UTC 2007

See  kern/83406: [smp] em/bge drivers: severe performance loss under SMP

sysctl machdep.cpu_idle_hlt=0
(sysctl machdep.hyperthreading_allowed=1)


>Try disabling hyperthreading on the 6.2-server. In some cases you get
>a moderate performance-increase, in most cases this setting is

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