Segher Boessenkool <seg...@kernel.crashing.org> writes: > On Fri, Dec 22, 2017 at 04:53:47PM -0600, David Esparza wrote: >> With a value of 85 GCC has a CPU performance degradation of 11%, >> reverting PRED_LOOP_EXIT to 92 this degradation disappear. >> Those values where measured by running c-ray ray-tracer that is a >> floating point benchmark that runs out of L1 cache. > > Why is this single benchmark more important than everything else? > > https://patchwork.ozlabs.org/patch/637073/
"Everything" else? :-) It sounds from Andrew's reply like it wasn't a win on other benchmarks too. Neither covering message has really explained why the previous value was too low/high, but maybe that's just the way it goes with these tuning parameters... Thanks, Richard
