rttest: add storage ranges

Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>

1 files changed, 18 insertions, 0 deletions

diff --git a/local_src/rttest/rttest.c b/local_src/rttest/rttest.c
index e34807c..38c6c6a 100644
--- a/local_src/rttest/rttest.c
+++ b/local_src/rttest/rttest.c
@@ -46,14 +46,19 @@ void timespec_add_ns(struct timespec *ts, unsigned ns)
 	}
 }
 
+#define MAX_HIST 10
+#define HIST_STEP_NS 1000000
+
 int main (void)
 {
 	struct timespec start_time, time1, time2;
+	unsigned long int hist[MAX_HIST];
 	unsigned long long int jitter;
 	unsigned long long int min_jit = 999999999999999ULL;
 	unsigned long long int max_jit = 0ULL;
 	unsigned long long sum_jit = 0ULL;
 	unsigned samples = 0;
+	int i;
 
 	mlockall(MCL_CURRENT | MCL_FUTURE);
 
@@ -63,6 +68,9 @@ int main (void)
 
 	/* Initialize the timer that will be used in nanosleep(),	*/
 	/* to a value of 100 us						*/
+	for (i = 0; i < MAX_HIST; i++) {
+		 hist[i] = 0;
+	}
 
 	printf("Measurement, please wait 1 minute...\n");
 	fflush(stdout);
@@ -88,6 +96,13 @@ int main (void)
 			min_jit = MIN(min_jit, jitter);
 			max_jit = MAX(max_jit, jitter); 
 			sum_jit += jitter;
+			for (i = 0; i < MAX_HIST; i++) {
+				if ((HIST_STEP_NS * i < jitter &&
+				    HIST_STEP_NS * (i + 1) > jitter) || MAX_HIST == i + 1) {
+					hist[i] += 1;
+				}
+			}
+
 		}
 		++samples;
 	} while (timespec_diff(&time2, &start_time) < 60000000000ULL);
@@ -97,5 +112,8 @@ int main (void)
 	printf ("Min latency: %llu us\n", min_jit / 1000);
 	printf ("Max latency: %llu us\n", max_jit / 1000);
 	printf ("Average latency: %llu us\n", (sum_jit / samples) / 1000);
+	for (i = 0; i < MAX_HIST; i++) {
+		printf ("%lu us: %lu\n", (i * HIST_STEP_NS), hist[i]);
+	}
 	exit(EXIT_SUCCESS);
 }