Class: Raindrops::TCP_Info

Inherits:
Object
  • Object
show all
Defined in:
ext/raindrops/linux_tcp_info.c,
ext/raindrops/linux_tcp_info.c

Overview

This is used to wrap “struct tcp_info” as described in tcp(7) and /usr/include/linux/tcp.h. The following readers methods are defined corresponding to the “tcpi_” fields in the tcp_info struct.

In particular, the last_data_recv field is useful for measuring the amount of time a client spent in the listen queue before accept(), but only if TCP_DEFER_ACCEPT is used with the listen socket (it is on by default in Unicorn).

  • state

  • ca_state

  • retransmits

  • probes

  • backoff

  • options

  • snd_wscale

  • rcv_wscale

  • rto

  • ato

  • snd_mss

  • rcv_mss

  • unacked

  • sacked

  • lost

  • retrans

  • fackets

  • last_data_sent

  • last_ack_sent

  • last_data_recv

  • last_ack_recv

  • pmtu

  • rcv_ssthresh

  • rtt

  • rttvar

  • snd_ssthresh

  • snd_cwnd

  • advmss

  • reordering

  • rcv_rtt

  • rcv_space

  • total_retrans

kernel.org/doc/man-pages/online/pages/man7/tcp.7.html