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author | Eduard Zingerman <eddyz87@gmail.com> | 2024-12-12 16:32:24 -0800 |
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committer | Alexei Starovoitov <ast@kernel.org> | 2024-12-12 22:03:38 -0800 |
commit | 5506b7d7bbdb7622959d80a4a2fc18985a01d512 (patch) | |
tree | 7e8643ffc2a2d0b79836d430f1c5e666538b5836 /tools/perf/scripts/python/export-to-postgresql.py | |
parent | f4f25b689b0da1c009028ed45ad1700c2cc8560a (diff) |
selftests/bpf: make BPF_TARGET_ENDIAN non-recursive to speed up *.bpf.o build
BPF_TARGET_ENDIAN is used in CLANG_BPF_BUILD_RULE and co macros.
It is defined as a recursively expanded variable, meaning that it is
recomputed each time the value is needed. Thus, it is recomputed for
each *.bpf.o file compilation. The variable is computed by running a C
compiler in a shell. This significantly hinders parallel build
performance for *.bpf.o files.
This commit changes BPF_TARGET_ENDIAN to be a simply expanded
variable.
# Build performance stats before this commit
$ git clean -xfd; time make -j12
real 1m0.000s
...
# Build performance stats after this commit
$ git clean -xfd; time make -j12
real 0m43.605s
...
Signed-off-by: Eduard Zingerman <eddyz87@gmail.com>
Acked-by: Yonghong Song <yonghong.song@linux.dev>
Link: https://lore.kernel.org/r/20241213003224.837030-1-eddyz87@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/export-to-postgresql.py')
0 files changed, 0 insertions, 0 deletions