Re: [PATCH] x86/fred: Optimize the FRED entry by prioritizing high-probability event dispatching

From: H. Peter Anvin
Date: Fri Jan 17 2025 - 11:25:26 EST



In short, seems that __builtin_expect not work with switch(), at least for
 gcc version 8.5.0 20210514(RHEL).


For forward-facing optimizations, please don't use an ancient version of gcc as the benchmark.

-hpa