diff options
| -rw-r--r-- | README.md | 8 | ||||
| -rw-r--r-- | doc/COMPILERS.md | 5 | ||||
| -rw-r--r-- | etc/repos.json | 12 | ||||
| -rw-r--r-- | src/compilers/gcc-13-musl.TARGETS | 8 |
4 files changed, 33 insertions, 0 deletions
@@ -198,6 +198,14 @@ Example configuration for bootstrapping on NixOS (hashes may vary): } ~~~ +## Musl Performance Issues + +Musl has huge allocator contention issues with multithreading. For that reason, +all our `musl` compilers are shipped with the alternative allocator +[mimalloc](https://github.com/microsoft/mimalloc) that solves these issues. If +you notice any performance slowdowns with your Musl-linked binaries, consider +using the alternative allocator by appending `-l:mimalloc.o` to your `LDFLAGS`. + ## License All files are copyright Huawei Cloud Computing Technology Co., Ltd., license diff --git a/doc/COMPILERS.md b/doc/COMPILERS.md index 6fd4d64..4c1e756 100644 --- a/doc/COMPILERS.md +++ b/doc/COMPILERS.md @@ -30,6 +30,11 @@ binutils and GCC versions. Unfortunately, *musl-cross-make* does not call the `install-strip` target. Therefore, we apply manual stripping to achieve reproducibility. +Additionally, the alternative allocator object +[`mimalloc.o`](https://github.com/microsoft/mimalloc) is also built and added to +GCC's lib folder. Linking it can solve Musl's slowdowns with allocator +contention in multithreaded applications. + ## GCC Musl Static Static building is achieved by using the GCC 13.2.0 Musl toolchain diff --git a/etc/repos.json b/etc/repos.json index 090d101..d7bf9b6 100644 --- a/etc/repos.json +++ b/etc/repos.json @@ -200,6 +200,17 @@ , "target_root": "imports" , "target_file_name": "files.TARGETS" } + , "imports/mimalloc-2.1.2": + { "repository": + { "type": "archive" + , "content": "da9d9ced476e35074380f3e240b59970dc443cd8" + , "fetch": "https://github.com/microsoft/mimalloc/archive/refs/tags/v2.1.2.tar.gz" + , "sha256": "2b1bff6f717f9725c70bf8d79e4786da13de8a270059e4ba0bdd262ae7be46eb" + , "subdir": "mimalloc-2.1.2" + } + , "target_root": "imports" + , "target_file_name": "files.TARGETS" + } , "imports/boringssl": { "repository": { "type": "archive" @@ -334,6 +345,7 @@ , "mpc": "imports/mpc-1.3.1" , "mpfr": "imports/mpfr-4.2.1" , "gcc": "compilers/gcc-13.2.0-native" + , "mimalloc": "imports/mimalloc-2.1.2" } } , "compilers/gcc-13.2.0-musl-static": diff --git a/src/compilers/gcc-13-musl.TARGETS b/src/compilers/gcc-13-musl.TARGETS index 7d564e7..b8e1e07 100644 --- a/src/compilers/gcc-13-musl.TARGETS +++ b/src/compilers/gcc-13-musl.TARGETS @@ -118,6 +118,7 @@ , [["@", "mpc", "", "files"], "mpc"] , [["@", "mpfr", "", "files"], "mpfr"] , [["@", "gcc", "", "patched_sources"], "gcc"] + , [["@", "mimalloc", "", "files"], "mimalloc"] ] } , "combined_patched_sources": @@ -131,6 +132,7 @@ , "mv mpc ${DESTDIR}/mpc-latest.orig" , "mv mpfr ${DESTDIR}/mpfr-latest.orig" , "mv gcc ${DESTDIR}/gcc-13.orig" + , "mv mimalloc ${DESTDIR}/mimalloc" , "chmod +w ${DESTDIR}/config.mak" , "printf 'GCC_VER = 13\n' >> ${DESTDIR}/config.mak" ] @@ -283,8 +285,14 @@ [ "for f in $(ls ./bin/${TARGET}-*); do" , " ln -s $(basename $f) $(echo $f | sed 's|/'${TARGET}-'|/|g')" , "done" + , "# set CC for building alternative allocator" + , "export CC_FOR_TARGET=\"$(pwd)/bin/gcc\"" ] } + , [ "# provide alternative allocator mimalloc" + , "export MI_CFLAGS=\"-DMI_MALLOC_OVERRIDE -I${WORKDIR}/mimalloc/include -O3 -DNDEBUG -fPIC -fvisibility=hidden -ftls-model=initial-exec -fno-builtin-malloc -std=gnu11\"" + , "${CC_FOR_TARGET} ${MI_CFLAGS} -c ${WORKDIR}/mimalloc/src/static.c -o ./${TARGET}/lib/mimalloc.o" + ] ] } } |