Memory swapping instrumentation

[chiatee1@comp.nus.edu.sg]

Good day,

I am working on an academic project which involves obtaining statistics on
the kernel's VM swapping behaviour. May I know what is the best way to do
so (for either 2.2.15 or 2.4.17)?

Specifically, I need to measure statistics such as the average number of
times a page is swapped into memory, a measure of the average time period
for which a page waits on disk between reads, etc.

I tried doing this by writing to the kernel log (via "printk()") for each
swap-in/swap-out, but I found that the log buffer was constantly being
overflowed (thus losing information), even when I had enlarged the buffer.

Also, what are the precautions I need to take when hacking on the VM code
of either the 2.2 or 2.4 series kernels?

Thanks for any help,
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