Poor I/O Performance (test program attached)

[Michal Ostrowski <mostrows@styx.uwaterloo.ca>]

It was suggested to me to post the program with which I did my
testing. And so, by popular demand, the code is attached.

You can compile the code using: "gcc -o vmtest vmtest.c"

The command line options are described within the comments at the top
of the source file.  

I ran my tests with:

dd if=/dev/zero of=bigfile count=250000 bs=4096
time vmtest file bigfile threads 10 itr 1000 blocks 32 size 1000000000
(repeat last line, altering parameters as necessary)

Michal Ostrowski
mostrows@styx.uwaterloo.ca

vmtest.c.gz