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Diffstat (limited to 'tools/perf/bench/futex-wake-parallel.c')
-rw-r--r--tools/perf/bench/futex-wake-parallel.c58
1 files changed, 30 insertions, 28 deletions
diff --git a/tools/perf/bench/futex-wake-parallel.c b/tools/perf/bench/futex-wake-parallel.c
index 6e6f5247e1fe..958372ad159c 100644
--- a/tools/perf/bench/futex-wake-parallel.c
+++ b/tools/perf/bench/futex-wake-parallel.c
@@ -47,8 +47,7 @@ static unsigned int nwakes = 1;
static u_int32_t futex = 0;
static pthread_t *blocked_worker;
-static bool done = false, silent = false, fshared = false;
-static unsigned int nblocked_threads = 0, nwaking_threads = 0;
+static bool done = false;
static pthread_mutex_t thread_lock;
static pthread_cond_t thread_parent, thread_worker;
static pthread_barrier_t barrier;
@@ -56,11 +55,13 @@ static struct stats waketime_stats, wakeup_stats;
static unsigned int threads_starting;
static int futex_flag = 0;
+static struct bench_futex_parameters params;
+
static const struct option options[] = {
- OPT_UINTEGER('t', "threads", &nblocked_threads, "Specify amount of threads"),
- OPT_UINTEGER('w', "nwakers", &nwaking_threads, "Specify amount of waking threads"),
- OPT_BOOLEAN( 's', "silent", &silent, "Silent mode: do not display data/details"),
- OPT_BOOLEAN( 'S', "shared", &fshared, "Use shared futexes instead of private ones"),
+ OPT_UINTEGER('t', "threads", &params.nthreads, "Specify amount of threads"),
+ OPT_UINTEGER('w', "nwakers", &params.nwakes, "Specify amount of waking threads"),
+ OPT_BOOLEAN( 's', "silent", &params.silent, "Silent mode: do not display data/details"),
+ OPT_BOOLEAN( 'S', "shared", &params.fshared, "Use shared futexes instead of private ones"),
OPT_END()
};
@@ -96,10 +97,10 @@ static void wakeup_threads(struct thread_data *td, pthread_attr_t thread_attr)
pthread_attr_setdetachstate(&thread_attr, PTHREAD_CREATE_JOINABLE);
- pthread_barrier_init(&barrier, NULL, nwaking_threads + 1);
+ pthread_barrier_init(&barrier, NULL, params.nwakes + 1);
/* create and block all threads */
- for (i = 0; i < nwaking_threads; i++) {
+ for (i = 0; i < params.nwakes; i++) {
/*
* Thread creation order will impact per-thread latency
* as it will affect the order to acquire the hb spinlock.
@@ -112,7 +113,7 @@ static void wakeup_threads(struct thread_data *td, pthread_attr_t thread_attr)
pthread_barrier_wait(&barrier);
- for (i = 0; i < nwaking_threads; i++)
+ for (i = 0; i < params.nwakes; i++)
if (pthread_join(td[i].worker, NULL))
err(EXIT_FAILURE, "pthread_join");
@@ -143,10 +144,10 @@ static void block_threads(pthread_t *w, pthread_attr_t thread_attr,
cpu_set_t cpuset;
unsigned int i;
- threads_starting = nblocked_threads;
+ threads_starting = params.nthreads;
/* create and block all threads */
- for (i = 0; i < nblocked_threads; i++) {
+ for (i = 0; i < params.nthreads; i++) {
CPU_ZERO(&cpuset);
CPU_SET(cpu->map[i % cpu->nr], &cpuset);
@@ -167,7 +168,7 @@ static void print_run(struct thread_data *waking_worker, unsigned int run_num)
init_stats(&__wakeup_stats);
init_stats(&__waketime_stats);
- for (i = 0; i < nwaking_threads; i++) {
+ for (i = 0; i < params.nwakes; i++) {
update_stats(&__waketime_stats, waking_worker[i].runtime.tv_usec);
update_stats(&__wakeup_stats, waking_worker[i].nwoken);
}
@@ -178,7 +179,7 @@ static void print_run(struct thread_data *waking_worker, unsigned int run_num)
printf("[Run %d]: Avg per-thread latency (waking %d/%d threads) "
"in %.4f ms (+-%.2f%%)\n", run_num + 1, wakeup_avg,
- nblocked_threads, waketime_avg / USEC_PER_MSEC,
+ params.nthreads, waketime_avg / USEC_PER_MSEC,
rel_stddev_stats(waketime_stddev, waketime_avg));
}
@@ -193,7 +194,7 @@ static void print_summary(void)
printf("Avg per-thread latency (waking %d/%d threads) in %.4f ms (+-%.2f%%)\n",
wakeup_avg,
- nblocked_threads,
+ params.nthreads,
waketime_avg / USEC_PER_MSEC,
rel_stddev_stats(waketime_stddev, waketime_avg));
}
@@ -203,7 +204,7 @@ static void do_run_stats(struct thread_data *waking_worker)
{
unsigned int i;
- for (i = 0; i < nwaking_threads; i++) {
+ for (i = 0; i < params.nwakes; i++) {
update_stats(&waketime_stats, waking_worker[i].runtime.tv_usec);
update_stats(&wakeup_stats, waking_worker[i].nwoken);
}
@@ -242,32 +243,33 @@ int bench_futex_wake_parallel(int argc, const char **argv)
if (!cpu)
err(EXIT_FAILURE, "calloc");
- if (!nblocked_threads)
- nblocked_threads = cpu->nr;
+ if (!params.nthreads)
+ params.nthreads = cpu->nr;
/* some sanity checks */
- if (nwaking_threads > nblocked_threads || !nwaking_threads)
- nwaking_threads = nblocked_threads;
+ if (params.nwakes > params.nthreads ||
+ !params.nwakes)
+ params.nwakes = params.nthreads;
- if (nblocked_threads % nwaking_threads)
+ if (params.nthreads % params.nwakes)
errx(EXIT_FAILURE, "Must be perfectly divisible");
/*
* Each thread will wakeup nwakes tasks in
* a single futex_wait call.
*/
- nwakes = nblocked_threads/nwaking_threads;
+ nwakes = params.nthreads/params.nwakes;
- blocked_worker = calloc(nblocked_threads, sizeof(*blocked_worker));
+ blocked_worker = calloc(params.nthreads, sizeof(*blocked_worker));
if (!blocked_worker)
err(EXIT_FAILURE, "calloc");
- if (!fshared)
+ if (!params.fshared)
futex_flag = FUTEX_PRIVATE_FLAG;
printf("Run summary [PID %d]: blocking on %d threads (at [%s] "
"futex %p), %d threads waking up %d at a time.\n\n",
- getpid(), nblocked_threads, fshared ? "shared":"private",
- &futex, nwaking_threads, nwakes);
+ getpid(), params.nthreads, params.fshared ? "shared":"private",
+ &futex, params.nwakes, nwakes);
init_stats(&wakeup_stats);
init_stats(&waketime_stats);
@@ -278,7 +280,7 @@ int bench_futex_wake_parallel(int argc, const char **argv)
pthread_cond_init(&thread_worker, NULL);
for (j = 0; j < bench_repeat && !done; j++) {
- waking_worker = calloc(nwaking_threads, sizeof(*waking_worker));
+ waking_worker = calloc(params.nwakes, sizeof(*waking_worker));
if (!waking_worker)
err(EXIT_FAILURE, "calloc");
@@ -297,14 +299,14 @@ int bench_futex_wake_parallel(int argc, const char **argv)
/* Ok, all threads are patiently blocked, start waking folks up */
wakeup_threads(waking_worker, thread_attr);
- for (i = 0; i < nblocked_threads; i++) {
+ for (i = 0; i < params.nthreads; i++) {
ret = pthread_join(blocked_worker[i], NULL);
if (ret)
err(EXIT_FAILURE, "pthread_join");
}
do_run_stats(waking_worker);
- if (!silent)
+ if (!params.silent)
print_run(waking_worker, j);
free(waking_worker);
generated by cgit v1.2.3 (git 2.25.1) at 2025-05-12 13:32:27 +0000