Hi Maxim, Maxim Kuvyrkov wrote: > Thanks, benchmarking results are welcome! AArch64 doesn't use reg_pressure > scheduling by default. Use "-fsched-pressure > --param=sched-pressure-algorithm=2" to enable same thing as on ARM. I would > imagine C++ and Fortran floating-point code to be most affected.
On aarch64 I only see perf improvements with your patch: no perf degradations on all the tests that I have run. base0: r216447, -O3 base1: r216447, -O3 -fsched-pressure --param=sched-pressure-algorithm=2 patch: r216447 + your patch, -O3 -fsched-pressure --param=sched-pressure-algorithm=2 patch vs. base1 is only an improvement. base1 vs. base0 has a few good improvements, and some small degradations: your patch improves the perf for one of the degradations to the point it is better now with -fsched-pressure --param=sched-pressure-algorithm=2 than at -O3. Could we turn on "-fsched-pressure --param=sched-pressure-algorithm=2" by default for aarch64? Thanks, Sebastian
