Performance results for DSP using NEON co-processor on i.MX8/8X

[ykarafi]

Hello,

Customer : Harman

Project : M.A.R.S at BMW

Device: i.MX8QXP

BSP : L4.14.98-2.0.0_ga or later release

Are there any performance data for the released audio codec optimized by NEON SIMID instruction set on the i.MX8X (ARM A-35 core) device family ?

One additional question here : 

Would it be possible to deploy Linux in 1x A35 and other 3x A35 could be used as Audio Cores? 

I mean here, these 4x A35 cores have independent I- and D- caches but they do share the same L2 cache. Could that represent a blocking point for the partitioning (1x core for linux and 3x cores for audio processing) 

Best Regards,

Yassine

[karina_valencia]

Bio_TICFSL please continue with the follow up.

[ykarafi]

Hi,

Are more information about the customer application required here?

BR,

Yassine

[ykarafi]

Hi karinavalencia‌, 

I still need support for the second question : 

"Would it be possible to deploy Linux in 1x A35 and other 3x A35 could be used as Audio Cores? 

I mean here, these 4x A35 cores have independent I- and D- caches but they do share the same L2 cache. Could that represent a blocking point for the partitioning (1x core for linux and 3x cores for audio processing) "

Could SCFW settings for the xRDC domain enable having different OS running independently in the same A35-cluster?

BR,

Yassine

imx8qxp scfw‌

xrdc  

[Bio_TICFSL]

Hello Yassine,

NXP do not have any benchmark regarding audio codec optimized by neon. The supported Audio codec specification can be found from BSP release note "i.MX_Linux_Release_Notes.pdf", such as "7.4.3 Audio codec specification".

And if it used the Hi-Fi 4 DSP for audio codec, then A35 CPU has no loading, most decoding tasks are in DSP. The DSP is another Core which is out of the 4 x A35.

Regards

[ykarafi]

Hello Bio_TICFSL‌,

thank you for your answer.

I am aware of the DSP core. But to fulfill the audio processing requirements BMW is looking for, the HiFi4 DSP is not enough. 

That is why I was thinking of having some of the audio processing work done by the cortex A.

Best Regards,

Yassine