Index of /anton/bplat
This is bplat, a memory latency benchmark that tries to improve on
lmbench's lat_mem_rd by not being predictable by stride predictors.
This benchmark is based on a program posted by Bernd Paysan in
comp.arch (see the file Postings for some postings about that), and I
just modified it and packaged it up for easy benchmarking. I am not
sure that I got all the parameters right (especially the cs and cl
parameters to latency() in bplat.c), so take this as a first attempt.
Hopefully Bernd will pick it up and correct it if it is wrong.
DOWNLOAD, INSTALLATION and USAGE
tar xvfz bplat-$VERSION.tar.gz
and you will get a list of working set sizes and the load-to-load
latency for these working sets, e.g.:
which means that for a working set of 256KB, the program measured
8.8ns load-to-load latency.
You can adjust the MSPERTICK value if your OS has longer ticks than
10ms; e.g. with a 60HZ clock, you can use
You can specify the working set sizes to measure through SIZES, e.g.:
make SIZES="33554432 67108864"
Note that apparently only powers of 2 work correctly at the moment.
you can get bplat at
This program is free software under BSD or MIT/X11 license.
M. Anton Ertl Some things have to be seen to be believed
firstname.lastname@example.org Most things have to be believed to be seen