Dump the new delivery_rate and delivery_rate_app_limited fields that
were added to tcp_info in Linux v4.9.
Example output:
pacing_rate 65.7Mbps delivery_rate 62.9Mbps
And for the application-limited case this looks like:
pacing_rate 1031.1Mbps delivery_rate 87.4Mbps app_limited
Signed-off-by: Neal Cardwell <ncardw...@google.com>
Signed-off-by: Yuchung Cheng <ych...@google.com>
Signed-off-by: Eric Dumazet <eduma...@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soh...@google.com>
---
misc/ss.c | 9 +++++++++
1 file changed, 9 insertions(+)
diff --git a/misc/ss.c b/misc/ss.c
index dd77b81..18cfa93 100644
--- a/misc/ss.c
+++ b/misc/ss.c
@@ -766,6 +766,7 @@ struct tcpstat {
unsigned int lastack;
double pacing_rate;
double pacing_rate_max;
+ double delivery_rate;
unsigned long long bytes_acked;
unsigned long long bytes_received;
unsigned int segs_out;
@@ -789,6 +790,7 @@ struct tcpstat {
bool has_ecnseen_opt;
bool has_fastopen_opt;
bool has_wscale_opt;
+ bool app_limited;
struct dctcpstat *dctcp;
struct tcp_bbr_info *bbr_info;
};
@@ -1868,6 +1870,11 @@ static void tcp_stats_print(struct tcpstat *s)
s->pacing_rate_max));
}
+ if (s->delivery_rate)
+ printf(" delivery_rate %sbps", sprint_bw(b1, s->delivery_rate));
+ if (s->app_limited)
+ printf(" app_limited");
+
if (s->unacked)
printf(" unacked:%u", s->unacked);
if (s->retrans || s->retrans_total)
@@ -2162,6 +2169,8 @@ static void tcp_show_info(const struct nlmsghdr *nlh,
struct inet_diag_msg *r,
s.not_sent = info->tcpi_notsent_bytes;
if (info->tcpi_min_rtt && info->tcpi_min_rtt != ~0U)
s.min_rtt = (double) info->tcpi_min_rtt / 1000;
+ s.delivery_rate = info->tcpi_delivery_rate * 8.;
+ s.app_limited = info->tcpi_delivery_rate_app_limited;
tcp_stats_print(&s);
free(s.dctcp);
free(s.bbr_info);
--
2.8.0.rc3.226.g39d4020
