[Bf-committers] opencl benchmark results

[Patrick Shirkey]

Hi,

For those of you who are interested real world results for ffmpeg with
opencl we have run some benchmarking tests across our cluster.

We have found that leveraging opencl with ffmpeg gives us upto 4566
DP-MFLOP on a single machine.

Adding in the OpenCL component (GPUs) gives us around a 64% speed boost on
AMD A4's.
We got upto 400% increase on our intel machines (with alot of NVidia CUDA
cores).

We also noticed that essentially the same AMD/ATI card on a different bus
(AGP-8 versus PCI-E) only picked up an extra 6% in speed.

So clearly the recent work on the opencl integration with ffmpeg has
provided some real world dividends.

Just for the record our local cluster is clocking in around 20GFlops with
the opencl code in the mix. We haven't added in the cloud servers though
so that number is low.

While we are not a not a threat to the big players, combining resources
within the wider open source community creates a very serious competitor
that shouldn't be ignored.


Cheers

--
Patrick Shirkey
Boost Hardware Ltd