Hi all,
[EMAIL PROTECTED] wrote:
See kern/83406: [smp] em/bge drivers: severe performance loss under SMP
sysctl machdep.cpu_idle_hlt=0
(sysctl machdep.hyperthreading_allowed=1)
What actually do this ? (sysctl machdep.cpu_idle_hlt=0)
From this PR (kern/83406) it seems that if you want full performance
you need machdep.cpu_idle_hlt=0 and machdep.hyperthreading_allowed=0
or machdep.cpu_idle_hlt=1 and machdep.hyperthreading_allowed=1, and
others combination drop performance ..
Am I getting it right ?
And if yes why by default HT is disable, but machdep.cpu_idle_hlt is
enabled ?
I'm little confused :)
Regards
Alessandro
Try disabling hyperthreading on the 6.2-server. In some cases you get
a moderate performance-increase, in most cases this setting is
counter-productive.
regards
Claus
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--
Best Wishes,
Stefan Lambrev
ICQ# 24134177
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