This is for experimenting with OpenCL to see how easy it would be to add an opencl backend to libvips.
For Intel GPUs you need:
sudo apt-get install beignet-dev
To test:
curl https://codeload.github.com/hpc12/tools/tar.gz/master | tar xvfz -
cd tools-master
make
./print-devices
./cl-demo 100000 10
The demo should print GOOD at the end. My Dell is a Broadwell GT2 and gets
about 12GB/s on that demo.
- make a simple image processing program and try tuning it
- try on a discrete GPU as well, memory behaviour will be very different
- try with an AMD and nvidia GPU as well
- work units, sizing, scheduling ... we will have 128x128 pixel units, how many will we need to schedule to keep the GPU busy? maybe subdivide further?
- how many threads needed to keep GPU fed? perhaps have thread0 in the vips workpool as the GPU feeder?
- use the cpu as well, time cpu against orc