Linux/TDA2PXEVM: Regarding power estimation of the algorithm

Heechang Kim

Expert 2700 points

Part Number: TDA2PXEVM

Tool/software: Linux

Hi,

I used your algorithm like below.

EVE1 : Feature Plane Computation algorithm/Census algorithm/Disparity Hamming Distance algorithm

EVE2 : Image Pre-processing algorithm

DSP1 : Stereo Post-processing algorithm

DSP2 : Object Detection algorithm/Object Classification algorithm/Lane Detection algorithm

I'd like to know about power estimation each core.

In this site, the FAE engineer said that we should know rate of access to DDR for each core.

Below is the statistics.

[HOST] [IPU2 ] 98.273043 s: SCI_DSP1_MDMA | 51.380631 253.461275

[HOST] [IPU2 ] 98.273134 s: SCI_DSP1_EDMA | 138.481681 433.496995

[HOST] [IPU2 ] 98.273287 s: SCI_DSP2_MDMA | 24.835097 259.408682

[HOST] [IPU2 ] 98.273409 s: SCI_DSP2_EDMA | 46.357503 167.902480

[HOST] [IPU2 ] 98.273531 s: SCI_EVE1_TC0 | 183.599416 486.863978

[HOST] [IPU2 ] 98.273622 s: SCI_EVE1_TC1 | 281.757151 612.277495

[HOST] [IPU2 ] 98.273744 s: SCI_EVE2_TC0 | 80.189731 749.078827

[HOST] [IPU2 ] 98.273866 s: SCI_EVE2_TC1 | 25.083440 321.488372

How can I know rate of access to DDR in your algorithm?

Do you have the data of the access rate to DDR?

Regards,

Heechang

over 5 years ago

0 Piyali Goswami over 5 years ago

TI__Mastermind 30235 points

Heechang,

You can take the average DDR Bandwidth as you have highlighted in the log above to calculate initiator wise DDR bandwidth.
For example EVE1 DDR BW would be 183.599416 + 281.757151 = 465.356567 MBps

For a rough approximation of the Read vs Write BW you can assume 50% read and 50% write bandwidth and fill the resource loading sheet for power estimation per core.

Thanks and Regards,
Piyali

0 Heechang Kim over 5 years ago in reply to Piyali Goswami

Expert 2700 points

Hi Piyali,

In case of EVE1, the total DDR BW is 465.356567 MBps including 50% read and 50% write BW, right?
Then, is it find to send my FAE total DDR BW to calculate power estimation?

Thanks
Regards,
Heechang

0 Piyali Goswami over 5 years ago in reply to Heechang Kim

TI__Mastermind 30235 points

Heechang,

The estimation sheet takes read and write bandwidth separately, So you can give the EVE1 total bandwidth and mention 50% is read and 50% is write as a approximation to be filled in the read and write bandwidth input cells.

Thanks and Regards,
Piyali

0 Heechang Kim over 5 years ago in reply to Piyali Goswami

Expert 2700 points

Hi Piyali,

Thank you very much.

Regards,
Heechang

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Linux/TDA2PXEVM: Regarding power estimation of the algorithm