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| author | Paolo Bonzini | 2020-10-07 18:00:17 +0200 |
|---|---|---|
| committer | Alex Bennée | 2020-10-09 18:27:50 +0200 |
| commit | 0c3dd50eaecbfe267db1e90c2ade165da331e143 (patch) | |
| tree | 121f32ca28743fe50ca6b59fbf69cd5771ab666e | |
| parent | Merge remote-tracking branch 'remotes/dgibson/tags/ppc-for-5.2-20201009' into... (diff) | |
| download | qemu-0c3dd50eaecbfe267db1e90c2ade165da331e143.tar.gz qemu-0c3dd50eaecbfe267db1e90c2ade165da331e143.tar.xz qemu-0c3dd50eaecbfe267db1e90c2ade165da331e143.zip | |
configure: fix performance regression due to PIC objects
Because most files in QEMU are grouped into static libraries, Meson conservatively
compiles them with -fPIC. This is overkill and produces slowdowns up to 20% on
some TCG tests.
As a stopgap measure, use the b_staticpic option to limit the slowdown to
--enable-pie. https://github.com/mesonbuild/meson/pull/7760 will allow
us to use b_staticpic=false and let Meson do the right thing.
Reported-by: Ahmed Karaman <ahmedkrmn@outlook.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Alex Bennée <alex.bennee@linaro.org>
Message-Id: <20200924092314.1722645-57-pbonzini@redhat.com>
Message-Id: <20201007160038.26953-2-alex.bennee@linaro.org>
| -rwxr-xr-x | configure | 1 |
1 files changed, 1 insertions, 0 deletions
@@ -7209,6 +7209,7 @@ NINJA=${ninja:-$PWD/ninjatool} $meson setup \ -Dwerror=$(if test "$werror" = yes; then echo true; else echo false; fi) \ -Dstrip=$(if test "$strip_opt" = yes; then echo true; else echo false; fi) \ -Db_pie=$(if test "$pie" = yes; then echo true; else echo false; fi) \ + -Db_staticpic=$(if test "$pie" = yes; then echo true; else echo false; fi) \ -Db_coverage=$(if test "$gcov" = yes; then echo true; else echo false; fi) \ -Dmalloc=$malloc -Dmalloc_trim=$malloc_trim -Dsparse=$sparse \ -Dkvm=$kvm -Dhax=$hax -Dwhpx=$whpx -Dhvf=$hvf \ |