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-rw-r--r--tools/perf/bench/futex-hash.c125
1 files changed, 73 insertions, 52 deletions
diff --git a/tools/perf/bench/futex-hash.c b/tools/perf/bench/futex-hash.c
index 65eebe06c04d..2005a3fa3026 100644
--- a/tools/perf/bench/futex-hash.c
+++ b/tools/perf/bench/futex-hash.c
@@ -20,9 +20,10 @@
#include <linux/kernel.h>
#include <linux/zalloc.h>
#include <sys/time.h>
-#include <internal/cpumap.h>
+#include <sys/mman.h>
#include <perf/cpumap.h>
+#include "../util/mutex.h"
#include "../util/stat.h"
#include <subcmd/parse-options.h>
#include "bench.h"
@@ -30,18 +31,14 @@
#include <err.h>
-static unsigned int nthreads = 0;
-static unsigned int nsecs = 10;
-/* amount of futexes per thread */
-static unsigned int nfutexes = 1024;
-static bool fshared = false, done = false, silent = false;
+static bool done = false;
static int futex_flag = 0;
struct timeval bench__start, bench__end, bench__runtime;
-static pthread_mutex_t thread_lock;
+static struct mutex thread_lock;
static unsigned int threads_starting;
static struct stats throughput_stats;
-static pthread_cond_t thread_parent, thread_worker;
+static struct cond thread_parent, thread_worker;
struct worker {
int tid;
@@ -50,12 +47,18 @@ struct worker {
unsigned long ops;
};
+static struct bench_futex_parameters params = {
+ .nfutexes = 1024,
+ .runtime = 10,
+};
+
static const struct option options[] = {
- OPT_UINTEGER('t', "threads", &nthreads, "Specify amount of threads"),
- OPT_UINTEGER('r', "runtime", &nsecs, "Specify runtime (in seconds)"),
- OPT_UINTEGER('f', "futexes", &nfutexes, "Specify amount of futexes per 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('r', "runtime", &params.runtime, "Specify runtime (in seconds)"),
+ OPT_UINTEGER('f', "futexes", &params.nfutexes, "Specify amount of futexes per 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_BOOLEAN( 'm', "mlockall", &params.mlockall, "Lock all current and future memory"),
OPT_END()
};
@@ -71,15 +74,15 @@ static void *workerfn(void *arg)
unsigned int i;
unsigned long ops = w->ops; /* avoid cacheline bouncing */
- pthread_mutex_lock(&thread_lock);
+ mutex_lock(&thread_lock);
threads_starting--;
if (!threads_starting)
- pthread_cond_signal(&thread_parent);
- pthread_cond_wait(&thread_worker, &thread_lock);
- pthread_mutex_unlock(&thread_lock);
+ cond_signal(&thread_parent);
+ cond_wait(&thread_worker, &thread_lock);
+ mutex_unlock(&thread_lock);
do {
- for (i = 0; i < nfutexes; i++, ops++) {
+ for (i = 0; i < params.nfutexes; i++, ops++) {
/*
* We want the futex calls to fail in order to stress
* the hashing of uaddr and not measure other steps,
@@ -87,7 +90,7 @@ static void *workerfn(void *arg)
* the critical region protected by hb->lock.
*/
ret = futex_wait(&w->futex[i], 1234, NULL, futex_flag);
- if (!silent &&
+ if (!params.silent &&
(!ret || errno != EAGAIN || errno != EWOULDBLOCK))
warn("Non-expected futex return call");
}
@@ -113,19 +116,21 @@ static void print_summary(void)
double stddev = stddev_stats(&throughput_stats);
printf("%sAveraged %ld operations/sec (+- %.2f%%), total secs = %d\n",
- !silent ? "\n" : "", avg, rel_stddev_stats(stddev, avg),
+ !params.silent ? "\n" : "", avg, rel_stddev_stats(stddev, avg),
(int)bench__runtime.tv_sec);
}
int bench_futex_hash(int argc, const char **argv)
{
int ret = 0;
- cpu_set_t cpuset;
+ cpu_set_t *cpuset;
struct sigaction act;
unsigned int i;
pthread_attr_t thread_attr;
struct worker *worker = NULL;
struct perf_cpu_map *cpu;
+ int nrcpus;
+ size_t size;
argc = parse_options(argc, argv, options, bench_futex_hash_usage, 0);
if (argc) {
@@ -142,79 +147,95 @@ int bench_futex_hash(int argc, const char **argv)
act.sa_sigaction = toggle_done;
sigaction(SIGINT, &act, NULL);
- if (!nthreads) /* default to the number of CPUs */
- nthreads = cpu->nr;
+ if (params.mlockall) {
+ if (mlockall(MCL_CURRENT | MCL_FUTURE))
+ err(EXIT_FAILURE, "mlockall");
+ }
+
+ if (!params.nthreads) /* default to the number of CPUs */
+ params.nthreads = perf_cpu_map__nr(cpu);
- worker = calloc(nthreads, sizeof(*worker));
+ worker = calloc(params.nthreads, sizeof(*worker));
if (!worker)
goto errmem;
- if (!fshared)
+ if (!params.fshared)
futex_flag = FUTEX_PRIVATE_FLAG;
printf("Run summary [PID %d]: %d threads, each operating on %d [%s] futexes for %d secs.\n\n",
- getpid(), nthreads, nfutexes, fshared ? "shared":"private", nsecs);
+ getpid(), params.nthreads, params.nfutexes, params.fshared ? "shared":"private", params.runtime);
init_stats(&throughput_stats);
- pthread_mutex_init(&thread_lock, NULL);
- pthread_cond_init(&thread_parent, NULL);
- pthread_cond_init(&thread_worker, NULL);
+ mutex_init(&thread_lock);
+ cond_init(&thread_parent);
+ cond_init(&thread_worker);
- threads_starting = nthreads;
+ threads_starting = params.nthreads;
pthread_attr_init(&thread_attr);
gettimeofday(&bench__start, NULL);
- for (i = 0; i < nthreads; i++) {
+
+ nrcpus = perf_cpu_map__nr(cpu);
+ cpuset = CPU_ALLOC(nrcpus);
+ BUG_ON(!cpuset);
+ size = CPU_ALLOC_SIZE(nrcpus);
+
+ for (i = 0; i < params.nthreads; i++) {
worker[i].tid = i;
- worker[i].futex = calloc(nfutexes, sizeof(*worker[i].futex));
+ worker[i].futex = calloc(params.nfutexes, sizeof(*worker[i].futex));
if (!worker[i].futex)
goto errmem;
- CPU_ZERO(&cpuset);
- CPU_SET(cpu->map[i % cpu->nr], &cpuset);
+ CPU_ZERO_S(size, cpuset);
- ret = pthread_attr_setaffinity_np(&thread_attr, sizeof(cpu_set_t), &cpuset);
- if (ret)
+ CPU_SET_S(perf_cpu_map__cpu(cpu, i % perf_cpu_map__nr(cpu)).cpu, size, cpuset);
+ ret = pthread_attr_setaffinity_np(&thread_attr, size, cpuset);
+ if (ret) {
+ CPU_FREE(cpuset);
err(EXIT_FAILURE, "pthread_attr_setaffinity_np");
-
+ }
ret = pthread_create(&worker[i].thread, &thread_attr, workerfn,
(void *)(struct worker *) &worker[i]);
- if (ret)
+ if (ret) {
+ CPU_FREE(cpuset);
err(EXIT_FAILURE, "pthread_create");
+ }
}
+ CPU_FREE(cpuset);
pthread_attr_destroy(&thread_attr);
- pthread_mutex_lock(&thread_lock);
+ mutex_lock(&thread_lock);
while (threads_starting)
- pthread_cond_wait(&thread_parent, &thread_lock);
- pthread_cond_broadcast(&thread_worker);
- pthread_mutex_unlock(&thread_lock);
+ cond_wait(&thread_parent, &thread_lock);
+ cond_broadcast(&thread_worker);
+ mutex_unlock(&thread_lock);
- sleep(nsecs);
+ sleep(params.runtime);
toggle_done(0, NULL, NULL);
- for (i = 0; i < nthreads; i++) {
+ for (i = 0; i < params.nthreads; i++) {
ret = pthread_join(worker[i].thread, NULL);
if (ret)
err(EXIT_FAILURE, "pthread_join");
}
/* cleanup & report results */
- pthread_cond_destroy(&thread_parent);
- pthread_cond_destroy(&thread_worker);
- pthread_mutex_destroy(&thread_lock);
+ cond_destroy(&thread_parent);
+ cond_destroy(&thread_worker);
+ mutex_destroy(&thread_lock);
- for (i = 0; i < nthreads; i++) {
- unsigned long t = worker[i].ops / bench__runtime.tv_sec;
+ for (i = 0; i < params.nthreads; i++) {
+ unsigned long t = bench__runtime.tv_sec > 0 ?
+ worker[i].ops / bench__runtime.tv_sec : 0;
update_stats(&throughput_stats, t);
- if (!silent) {
- if (nfutexes == 1)
+ if (!params.silent) {
+ if (params.nfutexes == 1)
printf("[thread %2d] futex: %p [ %ld ops/sec ]\n",
worker[i].tid, &worker[i].futex[0], t);
else
printf("[thread %2d] futexes: %p ... %p [ %ld ops/sec ]\n",
worker[i].tid, &worker[i].futex[0],
- &worker[i].futex[nfutexes-1], t);
+ &worker[i].futex[params.nfutexes-1], t);
}
zfree(&worker[i].futex);
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