On Montag, 28. Mai 2018 12:58:20 CEST Richard Biener wrote: > compile-time effects of the patch on that. Embedded folks may want to rhn > their favorite benchmark and report results as well. > > So I did a -O2 -march=haswell [-ftree-slp-vectorize] SPEC CPU 2006 compile > and run and the compile-time > effect where measurable (SPEC records on a second granularity) is within > one second per benchmark > apart from 410.bwaves (from 3s to 5s) and 481.wrf (76s to 78s). > Performance-wise I notice significant > slowdowns for SPEC FP and some for SPEC INT (I only did a train run > sofar). I'll re-run with ref input now > and will post those numbers. > If you continue to see slowdowns, could you check with either no avx, or with -mprefer-avx128? The occational AVX256 instructions might be downclocking the CPU. But yes that would be a problem for this change on its own.
'Allan
