Intel i7 loop performance anomaly

Re:Intel i7 loop performance anomaly by fleitz on Tuesday December 03, 2013 @03:01PM (#6842764)

64 bit might not be the right alignment, and even aligned to 64 bit boundaries you can run into page and cacheline issues.

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Re:Intel i7 loop performance anomaly by malkia on Tuesday December 03, 2013 @03:15PM (#6842862)

Don't you always have to pad back with nops (0x90) since the scheduler might be looking ahead for other instructions to execute (or maybe not, since it's seeing jmp back). Just wildly guessing here...

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Re:Intel i7 loop performance anomaly by eliben on Tuesday December 03, 2013 @03:49PM (#6843086)

Just to be clear, I tried it with 64-byte alignment

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