> Under https://bugs.openjdk.org/browse/JDK-8264846 we moved to -O3 level of > gcc optimizations from -O1 level for libawt build. This improved our J2DBench > performance numbers in some options considerably. > > Recent changes done under https://bugs.openjdk.org/browse/JDK-8299337 causes > difference in generated code by gcc and this is resulting in performance > regression for bimg_misc-* J2DBench options in our performance servers. Under > https://bugs.openjdk.org/browse/JDK-8299337 we have just removed unused > variables and it is a cleanup task. > > We can force gcc to generate position independent code by using -fpic > option.Also i have removed -fgcse-after-reload option for gcc, because this > is by default covered under -O3 level of optimization introduced under > https://bugs.openjdk.org/browse/JDK-8264846. > > With this change bimg_misc-* J2DBench option performance regression is > resolved and there are no regression in other options of J2DBench or > SwingMark and it is verified in our performance servers.
Jayathirth D V has updated the pull request incrementally with one additional commit since the last revision: Shift comment ------------- Changes: - all: https://git.openjdk.org/jdk/pull/12761/files - new: https://git.openjdk.org/jdk/pull/12761/files/e8d25674..135883db Webrevs: - full: https://webrevs.openjdk.org/?repo=jdk&pr=12761&range=02 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12761&range=01-02 Stats: 8 lines in 1 file changed: 4 ins; 4 del; 0 mod Patch: https://git.openjdk.org/jdk/pull/12761.diff Fetch: git fetch https://git.openjdk.org/jdk pull/12761/head:pull/12761 PR: https://git.openjdk.org/jdk/pull/12761
