156 static volatile pid_t		child_pid			= -1;  variable
633 			child_exited = waitpid(child_pid, &status, WNOHANG);  in dispatch_events()
705 	if (child_pid != -1)  in stat_handle_error()
706 		kill(child_pid, SIGTERM);  in stat_handle_error()
732 		child_pid = evsel_list->workload.pid;  in __run_perf_stat()
884 		if (child_pid != -1) {  in __run_perf_stat()
886 				kill(child_pid, SIGTERM);  in __run_perf_stat()
887 			wait4(child_pid, &status, 0, &stat_config.ru_data);  in __run_perf_stat()
984 	if ((child_pid == -1) || stat_config.interval)  in skip_signal()
994 	child_pid = -1;  in skip_signal()
1011 	if (child_pid != -1)  in sig_atexit()
1012 		kill(child_pid, SIGTERM);  in sig_atexit()