mgpu is a small benchmark program to check the concurrent performance of
multiple GPUs.
In order to compile with make you might have to adjust the OCLFLAGS variable
in the Makefile that must point to you OpenCL source directory.
The help screen
$ ./mgpu --help
Usage:
mgpu [OPTION...] - test multi GPU performance
Help Options:
-?, --help Show help options
Application Options:
-n, --num-images=N Number of images
-w, --width=W Width of imags
-h, --height=H Height of images
--enable-profiling Enable profiling
mgpu in action
$ ./mgpu -n 12
# Platform: OpenCL 1.1 CUDA 4.2.1
# Device 0: GeForce GTX 580
# Device 1: GeForce GTX 580
# Computing <nlm> for 12 images of size 1024x1024
# Single GPU: total = 7.021065s, time per image = 0.585089s, error = 0.000000
# Single Threaded, Multi GPU: total = 6.437301s, time per image = 0.536442s, error = 0.000000
# Multi Threaded, Multi GPU: total = 3.508974s, time per image = 0.292415s, error = 0.000000