HyperThreading, kernel 2.6.10, 1 logical CPU idle !!

From: Boris Fersing (mastermac_at_free.fr)
Date: 04/30/05

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    To: linux-kernel@vger.kernel.org
Date:	Sat, 30 Apr 2005 18:47:04 +0200

    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 ?

    Is that a kernel issue ? Could you please explain me what's happening ?

    Thank you !

    Boris.

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