From: Don Scott <systemic@speakeasy.net>
To: linux-smp@vger.kernel.org
Subject: cpu's not sharing load evenly
Date: 01 Nov 2002 22:20:45 -0800 [thread overview]
Message-ID: <1036218045.6136.70.camel@water> (raw)
The hardware:
2 MP2000+
A7V266-D MPX
The 2.4.19-gentoo-r9 SMP kernel:
AthlonMP(gcc31)
MTRR
Symmetric multi-processing
Preemptible Kernel
Enhanced Real Time Clock Support
My /etc/make.conf includes:
MAKEOPTS="-j3"
My Problem:
When compiling code it seems that the sum total of all the work being
done by both cpu's is almost always equal to no more than one cpu. For
example, CPU0 45% idle - CPU1 55% idle, or CPU0 95% idle - CPU1 5% idle.
I expected the load on the cpu's to be more symmetric. It bothers me
when I see CPU0 at 100% and CPU1 twiddling it's thumbs. Not until the
load average gets over 2 or 3, do I see both cpu's go to 0% idle.
My questions:
Is this performance behavior normal? Is there anything I can do to make
the cpu's share the load more evenly?
Thank you.
--Don
reply other threads:[~2002-11-02 6:20 UTC|newest]
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