How to benchmark kernel (-Os vs -O2)

Posted by NightwishFan on Super User See other posts from Super User or by NightwishFan
Published on 2011-01-15T05:51:38Z Indexed on 2011/01/15 5:55 UTC
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Performance

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kernel

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benchmark

It seems logical to me that on a 64-bit kernel compiling it to optimize for size might help overall. (My distro of choice uses -O2) It has the benefits of more registers and memory and perhaps less cache contention than normal optimized code. I have a kernel compiled like this and it seems excellent. However my question is how can I prove this? I like using Phoronix for "real world" sort of benchmarks so I would prefer to test cases like that. What should I pick to test? Does anyone else have any alternatives? Thank you very much in advance.

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