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| author | Adhemerval Zanella Netto <adhemerval.zanella@linaro.org> | 2022-07-21 10:05:01 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2022-07-22 11:58:27 -0300 |
| commit | 5d765ada01d140d8d1ecf94953a4751593af720d (patch) | |
| tree | ec344761c986ebc53ae613c0417a929bfc1381b2 /benchtests/bench-util.h | |
| parent | 8dd890d96f1833a58de6e112a14d63ab44e0a402 (diff) | |
| download | glibc-5d765ada01d140d8d1ecf94953a4751593af720d.tar.gz glibc-5d765ada01d140d8d1ecf94953a4751593af720d.tar.xz glibc-5d765ada01d140d8d1ecf94953a4751593af720d.zip | |
benchtests: Add arc4random benchtest
It shows both throughput (total bytes obtained in the test duration) and latecy for both arc4random and arc4random_buf with different sizes. Checked on x86_64-linux-gnu, aarch64-linux, and powerpc64le-linux-gnu.
Diffstat (limited to 'benchtests/bench-util.h')
| -rw-r--r-- | benchtests/bench-util.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/benchtests/bench-util.h b/benchtests/bench-util.h index d0e29423aa..00f78d649f 100644 --- a/benchtests/bench-util.h +++ b/benchtests/bench-util.h @@ -16,6 +16,13 @@ License along with the GNU C Library; if not, see <https://www.gnu.org/licenses/>. */ +/* Prevent compiler to optimize away call. */ +#define DO_NOT_OPTIMIZE_OUT(value) \ + ({ \ + __typeof (value) __v = (value); \ + asm volatile ("" : : "r,m" (__v) : "memory"); \ + __v; \ + }) #ifndef START_ITER # define START_ITER (100000000) |