sbm

commit cbb4d1e9b2806ab7521fb35b1d8533fee02cb8d3
parent c0be38706db5461be5147c303a89393b2c977010
Author: sin <sin@2f30.org>
Date:   Mon, 22 Feb 2016 15:32:21 +0000

Add some clarification around sampling rate

Diffstat:
M
sbm.c
 | 
8
+++++++-

1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/sbm.c b/sbm.c
@@ -40,6 +40,8 @@
 
 #include "arg.h"
 
+#define SAMPLINGRATE (100) /* sampling rate in ms */
+
 char *argv0;
 
 void
@@ -225,7 +227,11 @@ loop(char *ifname, long count, struct timeval *delay)
 	getmonotime(&old);
 	sample(ifname, &oldrxbytes, &oldtxbytes, &oldrxpps, &oldtxpps);
 	for (;;) {
-		usleep(100000); /* sleep for 100 ms */
+		/*
+		 * This is the maximum sampling rate that is supported and
+		 * is always less or equal to the given delay.
+		 */
+		usleep(SAMPLINGRATE * 1000);
 		sample(ifname, &rxbytes, &txbytes, &rxpps, &txpps);
 		getmonotime(&now);
 		timersub(&now, &old, &diff);