DDR3 throughput on p1010 RDB-PB

[dmitri_kr]

Hi,

On p1010-RDB-PB we see effective throughput of 185MB/s when doing DDR3 writes. Core frequency is 800MHz, DDR3 does not make any difference, we are getting same throughput at 266, 333 and 400 MHz DDR3 clock rates. When core frequency is increased to 1 GHz data rate goes up to 232MB/s.

Is this the expected throughput?

Thank you,

Dmitri

[alexander_yakov]

Do you have data cache enabled for this memory region? Write-through or write-back?

-----------------------------------------------------------------------------------------------------------------------
Note: If this post answers your question, please click the Correct Answer button. Thank you!
-----------------------------------------------------------------------------------------------------------------------

[dmitri_kr]

Hi Alexander,

Yes, I have copy-back cache enabled. A bit more info I am using vxworks bsp, DDR controller configuration is identical to the one from u-boot shipped with the development system.

Best regards,

Dmitri Krivchitch