Re: Linux 2.6.17-rc2 (fwd)

From: Dylan Griffiths <dylang_at_no.spam.please>
Date: Fri Apr 21 2006 - 14:56:44 CST

        Laugh indeed.

        It's well worth noting that Linus is right. Conceptually, COW fork
tricks worked well when CPU and memory didn't have as much of a Neumann
bottleneck as they now have. Machines in the 1980s had maybe a 2x or 3x
divider on memory to CPU. I recently benchmarked several machines for a
thesis where the memory bus was 6x slower than the CPU, assuming peak
conditions. The moment you get above cache size, performance falls
through the floor; you don't want to dick around handling page faults in
that situation, you want it to run as smoothly as possible.
Received on Fri Apr 21 14:56:49 2006

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