https://sourceware.org/bugzilla/show_bug.cgi?id=26766
--- Comment #10 from Martin Liska <mliska at suse dot cz> --- (In reply to H.J. Lu from comment #9) > I updated users/hjl/pgo-lto branch. Please give it a try. Looks nice to me! Few comments: - using make -j16 leads to invocation of many ltrans units: $ ps ax | grep lto1 | grep ltrans | wc -l 182 16057 pts/4 R+ 0:00 /usr/lib64/gcc/x86_64-suse-linux/10/lto1 -quiet -dumpdir ./ -dumpbase size.ltrans20 -mtune=generic -march=x86-64 -auxbase-strip /tmp/size.LZeDmU.ltrans20.ltrans.o -g -g -O2 -O2 -Wextra -Wshadow -Wstack-usage=262144 -fno-openmp -fno-openacc -fno-pie -fprofile-generate -fltrans /tmp/size.LZeDmU.ltrans20.o -o /tmp/cctrJGxZ.s 16059 pts/4 R+ 0:00 /usr/lib64/gcc/x86_64-suse-linux/10/lto1 -quiet -dumpdir ./ -dumpbase strings.ltrans1 -mtune=generic -march=x86-64 -auxbase-strip /tmp/strings.hZ0ByX.ltrans1.ltrans.o -g -g -O2 -O2 -Wextra -Wshadow -Wstack-usage=262144 -fno-openmp -fno-openacc -fno-pie -fprofile-generate -fltrans /tmp/strings.hZ0ByX.ltrans1.o -o /tmp/ccRyZY47.s 16061 pts/4 R+ 0:00 /usr/lib64/gcc/x86_64-suse-linux/10/lto1 -quiet -dumpdir ./ -dumpbase size.ltrans15 -mtune=generic -march=x86-64 -auxbase-strip /tmp/size.LZeDmU.ltrans15.ltrans.o -g -g -O2 -O2 -Wextra -Wshadow -Wstack-usage=262144 -fno-openmp -fno-openacc -fno-pie -fprofile-generate -fltrans /tmp/size.LZeDmU.ltrans15.o -o /tmp/cctzjdSi.s 16063 pts/4 R+ 0:00 /usr/lib64/gcc/x86_64-suse-linux/10/lto1 -quiet -dumpdir ./ -dumpbase strings.ltrans6 -mtune=generic -march=x86-64 -auxbase-strip /tmp/strings.hZ0ByX.ltrans6.ltrans.o -g -g -O2 -O2 -Wextra -Wshadow -Wstack-usage=262144 -fno-openmp -fno-openacc -fno-pie -fprofile-generate -fltrans /tmp/strings.hZ0ByX.ltrans6.o -o /tmp/ccbMqdFo.s It seems -flto=jobserver is not working as it should be. - about the --enable-pgo-bootstrap=lto, I would recommend adding an orthogonal option: --enable-lto-build where it will append -flto=jobserver and will be independent to --enable-pgo-bootstrap as I asked in the original comment. Apart from that, it works nice! -- You are receiving this mail because: You are on the CC list for the bug.
