On Dec 13, 2005, at 2:12 PM, Robert Fitzpatrick wrote:
I guess this means my new server is only using one of my CPUs?
esmtp# grep CPU /var/log/dmesg.today
CPU: Intel(R) Xeon(TM) CPU 2.40GHz (2399.33-MHz 686-class CPU)
Hyperthreading: 2 logical CPUs
cpu0: <ACPI CPU (2 Cx states)> on acpi0
Can someone point me to the best doc for enabling use of both CPUs on
the FreeBSD 5.4 server? I assume the kernel needs built with options.
Note that if you've only got one physical HTT-capable CPU, running in
single-processor mode is likely to give better performance than
running SMP just to enable the hyperthreaded virtual CPU. If you've
got a dual-CPU box and need to run SMP for that anyway, then using
HTT seems to sometimes help and sometimes reduce performance.
--
-Chuck
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