Re: [PATCH 3/4] perf, x86: Use ALTERNATIVE() to check for X86_FEATURE_PERFCTR_CORE

[Andi Kleen]

Robert Richter <robert.richter@xxxxxxx> writes:

> Using ALTERNATIVE() when checking for X86_FEATURE_PERFCTR_CORE avoids
> an extra pointer chase and data cache hit.

Is that really a performance critical path?

Seems more like unnecessary obfuscation to me.

-Andi


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