mbw(1) General Commands Manual mbw(1) 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 de- fault 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 physi- cal 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 sys- tem. TODO Multiple thread support. Better configurability, including using getopt() for parsing arguments. AUTHOR andras.horvath@gmail.com memory bandwidth benchmark Apr 26, 2006 mbw(1)
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