Hi,
I just bought a new computer with 2 PII 350MHZ. (128mo)
I've played at building kernels to compare speed with 1 and
2 processors.
The kernel I'm using is 2.0.36 (rebuilt by myself to
support SMP)
(Timing is done with the time command)
Test: 2 CPUs 1 CPU
make zdisk 3:26.19 3:30.93
make -j 2 zdisk 3:24.29 xxxxxxx(1)
make -j 4 zdisk 3:25.83 xxxxxxx(1)
(1) I did not have time to perform the two last tests but
I guess they
should not produce significantly different results
Observations:
1. I can't see any significant difference between make
zdisk and make -j 2 zdisk. (I thought I would)
2. There is no difference between 1 and 2 processors as
well.
Thanks to /proc/cpuinfo, I'm sure that both processors
are activated in SMP test.
So, has anyone some idea about the reason I don't see any
benefits of the 2
processors?
Beside that, I have two other question:
1. Is 3:30.93 a reasonnable time to build a 2.0.36 kernel
(with sound support,
scsi support and NO network support ) on a 350MHZ PII?
2. Which factor should I observe between 1 and 2 processors
in this kind of test?
Help is *really* welcomed.
Thank you for your time.
Regards, Frederic
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