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Altera_Forum
Honored Contributor
Honored ContributorPerformance of NIOS II is 15.5 DMIPS...
Hi All, I just ran the Dhrystone program on a "standard" design of a 1S10ES eval. board running at 50Mhz. I get a performance of 15.5 DMIPS. This is without any changes to the default synth...
Altera_ForumHonored Contributor
Honored ContributorAffluent,
Can you describe any changes you have made in SOPC Builder? Your d-mip number sounds quite low given you're running at 50MHz. Increasing the clock speed will only increase the D-MIP result by the multiple of the clock speed increase; to improve performance I'd suggest addessing whatever is wrong before trying to get the last 2-3MHz in f-max out of it. The D-MIPS numbers in the Nios II CPU wizard should give a clue as to what is to be expected. Is there anything different in your system? Is some other master accessing the same memory as your dhrystone app when you run it? Have you turned off the HW multiplier?
