diff --git a/source/tools/detect/irqoff/irqoff.c b/source/tools/detect/irqoff/irqoff.c
index 5b331bde2a094b3b886b62dde06f9be2dc626525..da6db5fa0c3a16f9a713b2dcefa854df40c2d10d 100644
--- a/source/tools/detect/irqoff/irqoff.c
+++ b/source/tools/detect/irqoff/irqoff.c
@@ -125,15 +125,6 @@ static error_t parse_arg(int key, char *arg, struct argp_state *state)
 	default:
 		return ARGP_ERR_UNKNOWN;
 	}
-	if (!filep) {
-		filep = fopen(defaultfile, "w+");
-		if (!filep) {
-			ret = errno;
-			fprintf(stderr, "%s :fopen %s\n",
-				strerror(errno), defaultfile);
-			return ret;
-		}
-	}
 
 	/* refer to watchdog.c:set_sample_period, sample_period set to thres*2/5. */
 	env.sample_period = env.threshold*2/5;
@@ -467,6 +458,15 @@ int main(int argc, char **argv)
 		fprintf(stderr, "argp_parse fail\n");
 		return err;
 	}
+	if (!filep) {
+		filep = fopen(defaultfile, "w+");
+		if (!filep) {
+			err = errno;
+			fprintf(stderr, "%s :fopen %s\n",
+				strerror(errno), defaultfile);
+			return err;
+		}
+	}
 	libbpf_set_print(libbpf_print_fn);
 
 	bump_memlock_rlimit();
diff --git a/source/tools/monitor/sched/runqslower/runqslower.c b/source/tools/monitor/sched/runqslower/runqslower.c
index 124bc9a7f8ef08d187b4dc199171680ea776f8fc..01e54e42ff53247c7b01a5c7060afbbe7ca83f89 100644
--- a/source/tools/monitor/sched/runqslower/runqslower.c
+++ b/source/tools/monitor/sched/runqslower/runqslower.c
@@ -166,15 +166,6 @@ static error_t parse_arg(int key, char *arg, struct argp_state *state)
 	default:
 		return ARGP_ERR_UNKNOWN;
 	}
-	if (!filep) {
-		filep = fopen(defaultfile, "w+");
-		if (!filep) {
-			int ret = errno;
-			fprintf(stderr, "%s :fopen %s\n",
-				strerror(errno), defaultfile);
-			return ret;
-		}
-	}
 	return 0;
 }
 
@@ -366,6 +357,15 @@ int main(int argc, char **argv)
 	err = argp_parse(&argp, argc, argv, 0, NULL, NULL);
 	if (err)
 		return err;
+	if (!filep) {
+		filep = fopen(defaultfile, "w+");
+		if (!filep) {
+			err = errno;
+			fprintf(stderr, "%s :fopen %s\n",
+				strerror(errno), defaultfile);
+			return err;
+		}
+	}
 
 	libbpf_set_print(libbpf_print_fn);