i.MX ProcessorsのトピックRe: Using DMA to do the memory copy.

Using DMA to do the memory copy.

lifrank — Tue, 08 Sep 2015 02:57:57 GMT

Hi All:

I want to use the DMA to replace the memcpy() what I using now to improve performance of the system, but I don't know how to do it. I can not find the solution in the IM6Q reference manual. Could you give me the sample code or documents? I'm using IM6Q, linux 3.05 BSP. Thank you.

Re: Using DMA to do the memory copy.

igorpadykov — Tue, 08 Sep 2015 03:57:42 GMT

Hi frank

please look at below links

android-imx6-kitkat/0370-ENGR00233569-Add-test-codes-for-SDMA-M2M-copy-using-.patch at master · rabeeh/android-imx6-kitk…

i.MX6 SDMA

Best regards

igor

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Re: Using DMA to do the memory copy.

Yuri — Tue, 08 Sep 2015 08:33:55 GMT

I have some doubt if the SDMA improves memcpy performance.

Also, the following may be helpful :

https://community.freescale.com/docs/DOC-106467

Regards,

Yuri.

Re: Using DMA to do the memory copy.

lifrank — Thu, 10 Sep 2015 07:41:59 GMT

Thanks a lot. I will check it now.