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The REAL problem is with the execution speed. If this program is run on
a multiprocessor system in the bg, and top is executed, the processes
only get ~15% of the CPU time, and the system gets a whopping 400% and
about 385% idle. (* processors - 800%).
If I use a fork and multiply processes, the CPU is used about 799%, 1%
system, 0 idle.
The Question is WHY???? I'm pulling my hair out here! HELP! [I have
enclosed the source]
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I've been living under the impression that linux doesn't support kernel
level threads. Which in this case would mean that the kernel schedules
your process on ONE cpu (it doesn't know about threads). All the threading
would then have to be cunducted in userspace and perhaps system calls from
there can cause the system % to shoot up.
I know this isn't much of an explanation, but I write so I can be
corrected if I'm wrong(which have happende before..). Also this whole
kernel thread stuff came up in class and it was never answered
satisfactory.
Anders Engle
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