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ss: print new tcp_info fields: delivery_rate and app_limited 

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 <ncardwell@google.com>
Signed-off-by: Yuchung Cheng <ycheng@google.com>
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: Soheil Hassas Yeganeh <soheil@google.com>
This commit is contained in:
Neal Cardwell 2016-12-01 13:21:39 -05:00 committed by Stephen Hemminger
parent 41fe6c34de
commit 2f579872fb
1 changed files with 9 additions and 0 deletions
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9
misc/ss.c
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@ -799,6 +799,7 @@ 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;
@ -822,6 +823,7 @@ 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;
};
@ -1973,6 +1975,11 @@ 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)
@ -2274,6 +2281,8 @@ 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);