flowtop: Add option for flow refresh interval

Add new -t,--interval option to specify flow refresh interval in
seconds.

Signed-off-by: Vadim Kochan <vadim4j@gmail.com>
[tk: Fix type conversion on rate calculation]
Signed-off-by: Tobias Klauser <tklauser@distanz.ch>

1 files changed, 3 insertions, 0 deletions

diff --git a/flowtop.8 b/flowtop.8
index 3a4e842..faa1da1 100644
--- a/flowtop.8
+++ b/flowtop.8
@@ -114,6 +114,9 @@ bandwidth or for mirroring Maxmind's databases (to bypass their traffic
 limit policy), different hosts or IP addresses can be placed into geoip.conf,
 separated by a newline.
 .PP
+.SS -t <time>, --interval <time>
+Flow info refresh interval in seconds, default is 1s.
+.PP
 .SS -v, --version
 Show version information and exit.
 .PP