perf/bench/futex-wake-parallel.c

5  * Block a bunch of threads and let parallel waker threads wakeup an
48 /* all threads will block on the same futex -- hash bucket chaos ;) */
63 	OPT_UINTEGER('t', "threads", &params.nthreads, "Specify amount of threads"),
64 	OPT_UINTEGER('w', "nwakers", &params.nwakes, "Specify amount of waking threads"),
108 	/* create and block all threads */  in wakeup_threads()
161 	/* create and block all threads */  in block_threads()
201 	printf("[Run %d]: Avg per-thread latency (waking %d/%d threads) "  in print_run()
216 	printf("Avg per-thread latency (waking %d/%d threads) in %.4f ms (+-%.2f%%)\n",  in print_summary()
294 	printf("Run summary [PID %d]: blocking on %d threads (at [%s] "  in bench_futex_wake_parallel()
295 	       "futex %p), %d threads waking up %d at a time.\n\n",  in bench_futex_wake_parallel()
311 		/* create, launch & block all threads */  in bench_futex_wake_parallel()
314 		/* make sure all threads are already blocked */  in bench_futex_wake_parallel()
323 		/* Ok, all threads are patiently blocked, start waking folks up */  in bench_futex_wake_parallel()