[PATCH] Increase min-lto-partition.
Martin Liška
mliska@suse.cz
Fri Mar 13 15:32:22 GMT 2020
And using EPYC2 with 64 cores I get:
$ time gcc -flto=auto -flinker-output=nolto-rel gimple-match.o -fno-checking --param lto-partitions=4 -r
real 0m11.040s
user 0m33.479s
sys 0m0.718s
$ time gcc -flto=auto -flinker-output=nolto-rel gimple-match.o -fno-checking --param lto-partitions=8 -r
real 0m6.542s
user 0m39.334s
sys 0m0.945s
$ time gcc -flto=auto -flinker-output=nolto-rel gimple-match.o -fno-checking --param lto-partitions=128 -r
real 0m4.945s
user 0m59.344s
sys 0m2.475s
So here the growth of user time is only about 100%.
And baseline is:
time g++ -O2 /tmp/gimple-match.ii -c
real 0m39.783s
user 0m39.385s
sys 0m0.372s
Martin
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