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Altera_Forum's avatar
Altera_Forum
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20 years ago

NIOS II vs. NIOS I real (!) performance

Using NIOS-I as a controller with some percentage of signal processing tasks, we came across the fact that the CPU core uses 2 extra cycles for write access to on-chip RAM, 1 cycle for read access. T...
Altera_Forum's avatar
Altera_Forum
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20 years ago

I have good news! The next version of Nios II (version 5.0) has dramatically better read/write performance.

This version should be available in a few weeks.

I'm not at liberty to divulge complete details at this point since Nios II 5.0 hasn't been officially released.

However, I can tell you that the read and write access times have been reduced in the Nios II/f by one cycle each if you use the new D-cache

or if you remove the D-cache completely. This basically matches the Nios II/s read/write performance.

There is also a new feature for the Nios II/f which reduces the access time for on-chip memory to values faster than Nios I.

To be continued ...