intel/libvpl

Add extra threads to a session

llin60 opened this issue · 3 comments

llin60 commented

Hi, I've been using oneVPL to do some video processing tasks, and I found that in some cases when I connect a decode session with a vpp session, the MFXVideoCORE_SyncOperation function in the vpp session takes a long time to execute, leading to a slow overall processing speed.
Based on my understanding, this MFXVideoCORE_SyncOperation calls the internal scheduler to run the existing awaiting tasks, I'm guessing the slow processing speed is probably caused by the limited thread number assigned to the scheduler in the session, so I wonder if there is any code I can refer to to manually add some extra threads to a session. I'm using API version>2.0 by the way.
Thanks in advance.

shepark commented

Yes, there's AsyncDepth, https://spec.oneapi.io/versions/latest/search.html?q=AsyncDepth
Please review sample_decode tool under tools/legacy/sample_decode folder for the proper implementation for that case.
And command line option is -async.

akwrobel commented

@llin60 do you have any remaining questions post the comment above?

llin60 commented

Thanks for the reply, I don't have further question. I'll close this issue.