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Re: MM performance benchmark
Randy Appleton <rappleto@nmu.edu> writes:
> Hi!
>
> I'm a professor of computer science at Northern Michigan University.
> Three students and myself
> have been benchmarking the Linux kernel. At
> http://euclid.nmu.edu/~benchmark you will see
> graphs describing performance for mmap() and page faults.
>
> Both graphs show a huge improvement between 2.2 and 2.3. We see a 100x
> performance
> gain. My questions is ... Why has performance improved so much? What
> changed between
> 2.2 and 2.3 to account for a 100x performance improvement?
The page cache usage was rewritten to be threaded, and more
importantly to not double buffer data between the page cache and the
buffer cache.
Eric
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