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Altera_Forum's avatar
Altera_Forum
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13 years ago

gnu profiler for Nios application, which compiler optimization level to choose

I'm trying to use the gprof as described in the AN391, and I'm not sure how to handle the compiler optimization flag -O, should I set it both in BSP and in Nios application ? in the AN391 it's r...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

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but I get more reasonable results when I set only BSP to -O3 and switch optimization off for the application,

the application is a simple AES encode & decode

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That sounds like a bug in your software that maybe you should look into.

However, if you want to defer looking into it, what you can do is just change the compiler settings for the source files which have your core AES algorithm in them.

If you continue to get incorrect results, you'll have to look into that.