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| author | Jack Brennen <jbrennen@google.com> | 2023-09-26 08:40:44 -0400 |
|---|---|---|
| committer | Masahiro Yamada <masahiroy@kernel.org> | 2023-10-03 20:25:59 +0900 |
| commit | 4074532758c5c367d3fcb8d124150824a254659d (patch) | |
| tree | 6855ea558308e1f2c4a92e990344ef11297cca48 /scripts/diffconfig | |
| parent | 8a749fd1a8720d4619c91c8b6e7528c0a355c0aa (diff) | |
| download | linux-4074532758c5c367d3fcb8d124150824a254659d.tar.gz linux-4074532758c5c367d3fcb8d124150824a254659d.tar.bz2 linux-4074532758c5c367d3fcb8d124150824a254659d.zip | |
modpost: Optimize symbol search from linear to binary search
Modify modpost to use binary search for converting addresses back
into symbol references. Previously it used linear search.
This change saves a few seconds of wall time for defconfig builds,
but can save several minutes on allyesconfigs.
Before:
$ make LLVM=1 -j128 allyesconfig vmlinux -s KCFLAGS="-Wno-error"
$ time scripts/mod/modpost -M -m -a -N -o vmlinux.symvers vmlinux.o
198.38user 1.27system 3:19.71elapsed
After:
$ make LLVM=1 -j128 allyesconfig vmlinux -s KCFLAGS="-Wno-error"
$ time scripts/mod/modpost -M -m -a -N -o vmlinux.symvers vmlinux.o
11.91user 0.85system 0:12.78elapsed
Signed-off-by: Jack Brennen <jbrennen@google.com>
Tested-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Diffstat (limited to 'scripts/diffconfig')
0 files changed, 0 insertions, 0 deletions