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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2024-09-01 20:24:03 +0300 |
|---|---|---|
| committer | Jason A. Donenfeld <Jason@zx2c4.com> | 2024-09-13 18:28:35 +0300 |
| commit | ecb8bd70d51ccf9009219a6097cef293deada65b (patch) | |
| tree | 80cfb684d96c6dd528333347f3f6497c31de69a8 /tools/testing/selftests/vDSO/Makefile | |
| parent | 18efd0b10e0fd77fe649a375f9f17a387b5d1609 (diff) | |
| download | linux-ecb8bd70d51ccf9009219a6097cef293deada65b.tar.xz | |
selftests: vDSO: build tests with O2 optimization
Without -O2, the generated code for testing chacha function is awful.
GCC even implements rol32() as a function of 20 instructions instead of
just using the rotlwi instruction.
~# time ./vdso_test_chacha
TAP version 13
1..1
ok 1 chacha: PASS
real 0m 37.16s
user 0m 36.89s
sys 0m 0.26s
Several other selftests directory add -O2, and the kernel is also
always built with optimisation active. Do the same for vDSO selftests.
With this patch the time is reduced by approximately 15%.
~# time ./vdso_test_chacha
TAP version 13
1..1
ok 1 chacha: PASS
real 0m 32.09s
user 0m 31.86s
sys 0m 0.22s
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>
Diffstat (limited to 'tools/testing/selftests/vDSO/Makefile')
| -rw-r--r-- | tools/testing/selftests/vDSO/Makefile | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/tools/testing/selftests/vDSO/Makefile b/tools/testing/selftests/vDSO/Makefile index d586d3e7a7c1..04930125035e 100644 --- a/tools/testing/selftests/vDSO/Makefile +++ b/tools/testing/selftests/vDSO/Makefile @@ -14,7 +14,7 @@ TEST_GEN_PROGS += vdso_test_getrandom TEST_GEN_PROGS += vdso_test_chacha endif -CFLAGS := -std=gnu99 +CFLAGS := -std=gnu99 -O2 ifeq ($(CONFIG_X86_32),y) LDLIBS += -lgcc_s |