NAME
mbw - Memory BandWidth benchmark
SYNOPSIS
mbw [options] arraysize_in_MiB
DESCRIPTION
mbw determines available memory bandwidth by copying large arrays of
data in memory.
OPTIONS
-q Quiet; suppress informational messages.
-a Suppress printing the average of each test.
-n <number>
Select number of loops per test
-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 <bytes>
Block size in bytes for -t2.
-h Show quick help.
USAGE
mbw will allocate two 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 mbw needs twice 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.
TODO
Multiple thread support. Better configurability, including using
getopt() for parsing arguments.
AUTHOR
Andras.Horvath@cern.ch