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.TH mbw 1 "Apr 26, 2006" "memory bandwidth benchmark"
.SH NAME
mbw \- Memory BandWidth benchmark
.SH SYNOPSIS
.B mbw
.RI [options]\ arraysize_in_MiB
.br
.SH DESCRIPTION
.B mbw
determines available memory bandwidth by copying large arrays of data in memory.
.SH OPTIONS
.B
.IP -q
Quiet; suppress informational messages.
.B
.IP -a
Suppress printing the average of each test.
.B
.IP "\-n <number>"
Select number of loops per test
.B
.IP "\-t <number>"
Select tests to be run. If no -t parameters are given the default is to run all tests. -t0: memcpy() test, -t1: dumb (b[i]=a[i] style) test, -t2: memcpy() with arbitrary block size
.B
.IP "\-b <bytes>"
Block size in bytes for -t2.
.B
.IP -h
Show quick help.
.SH USAGE
.B mbw
will allocate two
.B arraysize
arrays in memory and copy one to the other.
Reported 'bandwidth' is the amount of data copied over the time this operation took.
Obviously
.B mbw
needs twice
.B arraysize
MiBytes (1024*1024 bytes) of physical memory \- you'd better switch off swap or
otherwise make sure no paging occurs. Needless to say that it should not be run
on a busy system.
.SH TODO
Multiple thread support.
Better configurability, including using getopt() for parsing arguments.
.SH AUTHOR
andras.horvath@gmail.com
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