On Wed, Sep 16, 2026 at 11:17 AM Richard Biener <[email protected]> wrote: > > On Wed, 16 Sep 2026, Uros Bizjak wrote: > > > Set the i386 default for MD generator partitions to 6:6:1. > > > > The longest objects in the bootstrap are gimple-match-[1..10].o, > > with per-file user times of: > > > > user 0m12,114s > > user 0m6,214s > > user 0m6,737s > > user 0m8,234s > > user 0m5,765s > > user 0m5,221s > > user 0m5,732s > > user 0m5,221s > > user 0m5,645s > > user 0m7,951s > > > > while generic-match-[1..10].o compile in: > > > > user 0m5,875s > > user 0m5,186s > > user 0m4,132s > > user 0m4,367s > > user 0m4,464s > > user 0m4,705s > > user 0m4,340s > > user 0m5,942s > > user 0m4,469s > > user 0m4,236s > > > > With the default set to 6:6:1, compile times become: > > > > insn-emit-[1..6].o: > > > > user 0m4,766s > > user 0m4,799s > > user 0m4,829s > > user 0m4,825s > > user 0m4,766s > > user 0m4,781s > > > > insn-recog-[1..6].o: > > > > user 0m4,782s > > user 0m4,741s > > user 0m4,988s > > user 0m4,814s > > user 0m4,918s > > user 0m4,898s > > > > insn-attrtab-1.o: > > > > user 0m3,076s > > > > which are all comparable to the generic-match-[1..10].o compile times. > > > > Raising the partition counts further would shorten objects that are > > already off the critical path, while each additional partition > > repeats the per-file preamble, adding to overall bootstrap CPU time. > > > > gcc/ChangeLog: > > > > * config.gcc (i[34567]86-*-* | x86_64-*-*): Set > > default_md_generator_partitions target default to 6:6:1. > > > > Bootstrapped on x86_64-pc-linux-gnu. > > LGTM
Thanks! Pushed now. Uros.
