Upgrade from DM365 to DM368

zhiqiang chen

Hi,all

Upgrade from DM365 to DM368 ,I modify the frequency of ARM and DDR in UBL

In theory,DM368's frequency is higher,So the performance of DM368 is higher.

As a results,DM368's performance does not improve

I used DM365 to encode JPEG, It takes about 69ms and DM368 takes about 71ms.

Why the DM368's performance does not improve?

Thanks very much

czq

0 Raghu Kudva over 13 years ago

Hi,

It can be that the clocks that you have changed may not be correct or some more changes may be required.

Attaching the DM368 device.c file where pll1, pll2 and ddr timing are changed, please refer to it for your reference.

Regards,

Raghu

0 zhiqiang chen over 13 years ago in reply to Raghu Kudva

Thanks ,Raghu

And also I had modify the CL of the DDR parameter ,as a result,DM368's performence is the same as DM365.

I think, I found the problem, My DDR not support DDR2-800, The max clock is DDR2-667.

So,Maybe the problem is that My DDR not support DDR2-800.

Do you think so ?

Thanks so much

czq

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