On Tue, Apr 27, 2010 at 08:21:41AM +0200, Dominic Fandrey wrote: > Hello, > > I wanted to make some performance comparisons, building ClangBSD > with different compilers. > > The host system is: > FreeBSD mobileKamikaze.norad 8.0-STABLE FreeBSD 8.0-STABLE #0: Mon Apr 5 > 12:45:41 CEST 2010 > r...@mobilekamikaze.norad:/usr/obj/HP6510b-8/amd64/usr/src/sys/HP6510b-8 > amd64 > > An interesting result is that buildkernel with clang takes longer: > CC=clang > time -l make buildkernel > 921.31 real 802.25 user 114.93 sys > time -l make buildkernel -j3 > 645.17 real 838.46 user 143.03 sys > > CC=cc > time -l make buildkernel > 877.14 real 757.42 user 115.11 sys > time -l make buildkernel -j3 > 628.32 real 798.03 user 149.52 sys this is really strange... almost everyone is seeing much faster builds with clang
> All the tests are run on a 4g memory disk (src and objdir), which > is recreated for every test. > > I cannot make this comparison for buildworld, because buildworld > with CC=cc, CXX=c++ fails: > > ===> usr.bin/clang/lib/libclanglex (all) > c++ -isystem > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/include > -isystem > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/include/c++/4.2 > -isystem > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/include/c++/4.2/backward > > -B/root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/lib/ > > -L/root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/lib/ > -O2 -pipe > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/include > > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/tools/clang/include > > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/tools/clang/lib/Lex > -I. > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../include > -DLLVM_ON_UNIX -DLLVM_ON_FREEBSD -D__STDC_LIMIT_MACROS -D__STDC_CONS > TANT_MACROS -fno-rtti -DLLVM_HOSTTRIPLE=\"amd64-undermydesk-freebsd9.0\" > -fstack-protector -c > /root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/tools/clang/lib/Lex/HeaderMap.cpp > c++ -isystem > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/include > -isystem > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/include/c++/4.2 > -isystem > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/include/c++/4.2/backward > > -B/root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/lib/ > > -L/root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/lib/ > -O2 -pipe > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/include > > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/tools/clang/include > > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/tools/clang/lib/Lex > -I. > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../include > -DLLVM_ON_UNIX -DLLVM_ON_FREEBSD -D__STDC_LIMIT_MACROS -D__STDC_CONS > TANT_MACROS -fno-rtti -DLLVM_HOSTTRIPLE=\"amd64-undermydesk-freebsd9.0\" > -fstack-protector -c > /root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/tools/clang/lib/Lex/HeaderSearch.cpp > c++ -isystem > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/include > -isystem > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/include/c++/4.2 > -isystem > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/include/c++/4.2/backward > > -B/root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/lib/ > > -L/root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/lib/ > -O2 -pipe > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/include > > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/tools/clang/include > > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/tools/clang/lib/Lex > -I. > -I/root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../include > -DLLVM_ON_UNIX -DLLVM_ON_FREEBSD -D__STDC_LIMIT_MACROS -D__STDC_CONS > TANT_MACROS -fno-rtti -DLLVM_HOSTTRIPLE=\"amd64-undermydesk-freebsd9.0\" > -fstack-protector -c > /root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/tools/clang/lib/Lex/Lexer.cpp > In file included from > /root/clangbsd.gcc.1272316273/clangbsd/usr.bin/clang/lib/libclanglex/../../../../contrib/llvm/tools/clang/lib/Lex/Lexer.cpp:1116: > In file included from > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/include/emmintrin.h:34: > In file included from > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/include/xmmintrin.h:39: > /root/clangbsd.gcc.1272316273/obj/root/clangbsd.gcc.1272316273/clangbsd/tmp/usr/include/mmintrin.h:63:18: > error: use of undeclared identifier '__builtin_ia32_vec_init_v2si' > return (__m64) __builtin_ia32_vec_init_v2si (__i, 0); you are using old clangbsd.. please update and this will go away _______________________________________________ freebsd-current@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-current To unsubscribe, send any mail to "freebsd-current-unsubscr...@freebsd.org"
