Checking for decoding performance

Hi Yongsig,

The SDK does not have a codec node in OpenVX. The codec is accessed via gstreamer.

You could refer the multi-cam codec application for this gstreamer interface to OpenVX.

Regarding, the performance measurement, I shall let the codec expert respond to this. Please await for his response.

Regards,

Nikhil

Hi Nikhil

Thank you for your reply.

I'll wait for the answer again.

Best regards

Yongsig

Yongsig, 

The data in your screenshot is the hardware capabilities of the device that was verified at the Kernel level.

I do not have any data of run time in a node of OpenVx.

Best,

Brandon

Hi brandon.

Thanks for your reply.

As you know I'm testing about cma feature with the decoder.

When I disabled the cma feature in decoder, performance got faster than before.

it runs in 20ms without cma.  As I mentioned first, it ran in 34ms with cma.

I'm wondering what the cma could affect in the system.

Best regards

Yongsig

Hi Yongsig, 

This is something that we mention in the documentation: https://software-dl.ti.com/jacinto7/esd/processor-sdk-linux-jacinto7/09_00_01_03/exports/docs/linux/Foundational_Components_Multimedia_D5520_VXE384.html#decoder-driver-memory-optimisation

It was a design to decision used to decrease memory consumption in the driver at the cost of decreasing performance. The decision was made to enable it by default in previous releases as it seemed timing requirements were still met and customers wanted the decreased memory consumption. I do not have the numbers readily available on memory comparisons between the two different modes. In 9.0 release, I made decision to disable CMA by default and go back to use decoder MMU as default. 

Best, 

Brandon

Hi Brandon

Thanks for the quick response.

I have one more question.

vxe-enc and vxd-dec are used on TDA4VM. But wave5 is used on TDA4VH.

I'm wondering if I could turn off the cma in wave5 on TDA4VH.

Best regards

Yongsig.