besnardjb / memmapper

Guidelines

Installation

The program only depends on hwloc and locates it using pkg-config.

git clone https://github.com/besnardjb/memmapper.git
cd memmapper
# Makefile is trivial
make

Usage

This project build several programs to measure multiple metrics:

• memmapper: core-to-core memory bandwitdh (memcpy's)
• cache: cache bandwidth
• cache: bound processes-to-processes memory transfer (process_vm_*)
• shmem: bound process-to-process memory transfer (MAP_SHARED)

To build all scenarios at once (each run will produce a JSON output file):

$ ./gen.py > s.sh
$ ./s.sh

memmapper Usage:

 : total size to move in bytes
 -i : number of averaging iterations
 -o : output json file

Other programs Usage:

Usage: ./<program> [-i/-I] [-c/-r] [-c]

Transfer: intra-socket (-i) or inter-socket (-I)
Prefetch: Cold (-c) or Hot (-r)

Plot

Considering a file is generated with the -o option, it is possible to plot it using the embedded python script (requires matplotlib).

# If you do not have matplotlib (or are unsure)
pip install matplotlib
# Now the plot command (direct viz for a run with -o out.json)
./plot.py -i out.json
# It is also possible to generate output files directly
./plot.py -i out.json -o out.eps

To build results with matplotlib:

./plot.py -i out.json
# pretty-printing (in GB/sec)
./plot.py --gb -i out.json
# export depending on file extension
./plot -o file.png -i out.json

#one-liner
for f in ./results/*; do ./plot.py $f; done

Sample Output