* [PATCH iproute2] ss: take care of unknown min_rtt
@ 2016-04-13 22:18 Eric Dumazet
2016-04-19 14:57 ` Stephen Hemminger
0 siblings, 1 reply; 2+ messages in thread
From: Eric Dumazet @ 2016-04-13 22:18 UTC (permalink / raw)
To: Stephen Hemminger; +Cc: netdev
From: Eric Dumazet <edumazet@google.com>
Kernel sets info->tcpi_min_rtt to ~0U when no RTT sample was ever
taken for the session, thus min_rtt is unknown.
Signed-off-by: Eric Dumazet <edumazet@google.com>
---
misc/ss.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/misc/ss.c b/misc/ss.c
index 38cf331..51ff5ac 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -2018,7 +2018,8 @@ static void tcp_show_info(const struct nlmsghdr *nlh, struct inet_diag_msg *r,
s.segs_out = info->tcpi_segs_out;
s.segs_in = info->tcpi_segs_in;
s.not_sent = info->tcpi_notsent_bytes;
- s.min_rtt = (double) info->tcpi_min_rtt / 1000;
+ if (info->tcpi_min_rtt && info->tcpi_min_rtt != ~0U)
+ s.min_rtt = (double) info->tcpi_min_rtt / 1000;
tcp_stats_print(&s);
free(s.dctcp);
}
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2016-04-13 22:18 [PATCH iproute2] ss: take care of unknown min_rtt Eric Dumazet
2016-04-19 14:57 ` Stephen Hemminger
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