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Altera_Forum
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11 years ago

Altera DMA throughput calculation?

I have a Cyclone V and I am connecting a DMA read master to an On Chip RAM and the write master to the DDR Controller. It seems like I am getting 600MB/sec throughput, which looks too much! Is it ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

First time I've seen someone ask if they're getting too much throughput. :)

The fact that you're checking it on-chip seems promising. The controller does a lot of things to help efficiency. The high-level stuff in the handbook includes:

Command and Data Reordering

Bank Management

Streaming Reads and Writes

Bank Interleaving

Predictive Bank Management

Build-in Burst Adaptor

etc.

Efficiency is always dependent on the reads and writes, but a lot of this smooths out the low corner-cases for much better efficiency.