Performance drop using deinterlace_vaapi on 5.19-rcX

[Thomas Voegtle]

On Mon, 20 Jun 2022, Christian König wrote:

> Am 20.06.22 um 13:40 schrieb Thomas Voegtle:
>>  On Mon, 20 Jun 2022, Christian König wrote:
>>
>>>  Hi Thomas,
>>>
>>>  [moving vger to bcc]
>>>
>>>  mhm, sounds like something isn't running in parallel any more.
>>>
>>>  We usually don't test the multimedia engines for this but we do test
>>>  gfx+compute, so I'm really wondering what goes wrong here.
>>>
>>>  Could you run some tests for me? Additional to that I'm going to raise
>>>  that issue with our multimedia guys later today.
>>
>>  Yes, I can run some tests for you. Which tests?
>
> Try this as root:
>
> echo 1 > /sys/kernel/debug/tracing/events/dma_fence/dma_fence_init/enable
> echo 1 > /sys/kernel/debug/tracing/events/dma_fence/dma_fence_signaled/enable
> cat /sys/kernel/debug/tracing/trace_pipe > trace.log
>
> Then start the encoding in another shell, after it completed cancel the cat 
> with cntr+c and save the log file.
>
> Do this one with the old kernel and once with the new one.


    https://32h.de/tv/5.18.0-i5-trace.log.bz2
    https://32h.de/tv/5.19.0-rc3-i5-trace.log.bz2


I hope I have done this correctly.
All necessary tracing things switched on?

I want to add that this is a headless machine. No monitor connected.