#47 Can I run mpg123 on a NVIDIA GPU (Tesla K20c)?

[Abdullah Siddiqui]

Hello.

I tried searching online for methods to run mpg123 on a GPU.

I wanted to know if it is possible I can use mpg123 on a GPU.

Waiting for your reply.

[Abdullah Siddiqui]

I ran the following command:

mpg123 -D hw:1,3 root/Downloads/convergence_-_points_of_view/Traintoleave.mp3

but after examining my profile via gprof, I found it is giving me the same output as the CPU file. How can I confirm what processors are being used for playing my mp3 file?

[Thomas Orgis]

Are you sure the -D does what you think it does? Please look at the output of mpg123 --longhelp or the manpage.

Regarding the main question: The mpg123 code is not ported to GPUs. You'd need to rewrite code for OpenCL or CUDA. I am also not sure how much sense that would make, since you do not have that much data that you can work on in parallel. It might make sense to write up a decoder that works on many streams in parallel instead.

If you are looking for a typical task for a GPU, an audio decoder is just too small, IMHO.

[Abdullah Siddiqui]

Thank you again Mr. Orgis for your response.
I understand that decoding audio is not normally done on GPUs. I am doing it simply for experimental purposes. I want to see how much time the various functions would take to execute on the GPU and compare the numbers with the CPU values.