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Diffstat (limited to 'regressions/ck_brlock/benchmark/latency.c')
-rw-r--r-- | regressions/ck_brlock/benchmark/latency.c | 103 |
1 files changed, 103 insertions, 0 deletions
diff --git a/regressions/ck_brlock/benchmark/latency.c b/regressions/ck_brlock/benchmark/latency.c new file mode 100644 index 0000000..4db8e26 --- /dev/null +++ b/regressions/ck_brlock/benchmark/latency.c @@ -0,0 +1,103 @@ +/* + * Copyright 2011-2015 Samy Al Bahra. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +#include <ck_brlock.h> +#include <ck_rwlock.h> +#include <inttypes.h> +#include <stdio.h> + +#include "../../common.h" + +#ifndef STEPS +#define STEPS 1000000 +#endif + +int +main(void) +{ + uint64_t s_b, e_b, i; + ck_brlock_t brlock = CK_BRLOCK_INITIALIZER; + ck_brlock_reader_t r[8]; + ck_rwlock_t naive; + + for (i = 0; i < sizeof(r) / sizeof(*r); i++) + ck_brlock_read_register(&brlock, &r[i]); + + for (i = 0; i < STEPS; i++) { + ck_brlock_write_lock(&brlock); + ck_brlock_write_unlock(&brlock); + } + + s_b = rdtsc(); + for (i = 0; i < STEPS; i++) { + ck_brlock_write_lock(&brlock); + ck_brlock_write_unlock(&brlock); + } + e_b = rdtsc(); + printf("WRITE: brlock %15" PRIu64 "\n", (e_b - s_b) / STEPS); + + ck_rwlock_init(&naive); + for (i = 0; i < STEPS; i++) { + ck_rwlock_write_lock(&naive); + ck_rwlock_write_unlock(&naive); + } + + s_b = rdtsc(); + for (i = 0; i < STEPS; i++) { + ck_rwlock_write_lock(&naive); + ck_rwlock_write_unlock(&naive); + } + e_b = rdtsc(); + printf("WRITE: naive %15" PRIu64 "\n", (e_b - s_b) / STEPS); + + for (i = 0; i < STEPS; i++) { + ck_brlock_read_lock(&brlock, &r[0]); + ck_brlock_read_unlock(&r[0]); + } + s_b = rdtsc(); + for (i = 0; i < STEPS; i++) { + ck_brlock_read_lock(&brlock, &r[0]); + ck_brlock_read_unlock(&r[0]); + } + e_b = rdtsc(); + printf("READ: brlock %15" PRIu64 "\n", (e_b - s_b) / STEPS); + + for (i = 0; i < STEPS; i++) { + ck_rwlock_read_lock(&naive); + ck_rwlock_read_unlock(&naive); + } + + s_b = rdtsc(); + for (i = 0; i < STEPS; i++) { + ck_rwlock_read_lock(&naive); + ck_rwlock_read_unlock(&naive); + } + e_b = rdtsc(); + printf("READ: naive %15" PRIu64 "\n", (e_b - s_b) / STEPS); + + return (0); +} + |