This is the mail archive of the gcc-patches@gcc.gnu.org mailing list for the GCC project.


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]
Other format: [Raw text]

Re: [PATCH] Change PRED_LOOP_EXIT from 85 to 92


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/


Segher


Index Nav: [Date Index] [Subject Index] [Author Index] [Thread Index]
Message Nav: [Date Prev] [Date Next] [Thread Prev] [Thread Next]