Re: HyperThreading, kernel 2.6.10, 1 logical CPU idle !!
From: Boris Fersing
Date: Sat Apr 30 2005 - 16:38:50 EST
Robert Hancock a Ãcrit :
> Boris Fersing wrote:
>> Hi there,
>> I've a p4 HT 3,06Ghz, I've HT enabled in the BIOS and in the kernel :
>> Linux electron 2.6.10-cj5 #6 SMP Fri Mar 4 02:18:08 CET 2005 i686 Mobile
>> Intel(R) Pentium(R) 4 CPU 3.06GHz GenuineIntel GNU/Linux .
>> But it seems that one of my cpus is idle (gkrellm monitor or top) :
>> Cpu0 : 88.0% us, 12.0% sy, 0.0% ni, 0.0% id, 0.0% wa, 0.0% hi,
>> 0.0% si
>> Cpu1 : 0.0% us, 0.3% sy, 0.0% ni, 99.7% id, 0.0% wa, 0.0% hi,
>> 0.0% si
>> I'm actually compiling thunderbird with MAKEOPTS="-j3", so , the second
>> should be used, shouldn't it ?
> Are you sure that it is actually compiling multiple files at once?
Yes I'm sure, Even if I launch more than 1 gcc, or for example, start a
compilation + video encoding (mencoder) + ... the second CPU won't work
(idle 100% or sometimes 99,9%).
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