EDMA test using QDMA channel

Farrah Rashid

Other Parts Discussed in Thread: TMS320C6678

I have modified qdma_link_xfer_region() to transfer the ping buffer from L2SRAM to DDR space. I have measured the time it takes to do a memcpy(srcBuff1, dstBuff1, 256) versus the time it takes for a QDMA transfer to set the IPR bit. The memcpy is faster than the QDMA transfer. Is this expected?

Farrah

over 10 years ago

0 Raja over 10 years ago

TI__Guru* 81335 points

Hi Farrah,
Could you please mention the DSP part number used?
Thank you.

0 Farrah Rashid over 10 years ago in reply to Raja

Intellectual 340 points

Hi Raj,
I'm using the TMS320C6678.
Farrah

0 Pubesh over 10 years ago in reply to Farrah Rashid

TI__Mastermind 20790 points

Farrah,

How you are validating the measuring time period for the simple memcpy and QDMA transfer? The throughput performance discussed already in the following thread, Randy is shared the DSPMemSpeed zip file. This will be useful to find the EDMA performance in the different memory test case.
http://e2e.ti.com/support/dsp/c6000_multi-core_dsps/f/639/p/192457/690825

In addition that, please have a look at EDMA LLD based test code at: C:\ti\edma3_lld_02_11_05_02\examples\edma3_driver\src

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EDMA test using QDMA channel