diff options
| author | wollman <wollman@FreeBSD.org> | 1995-06-19 16:45:33 +0000 |
|---|---|---|
| committer | wollman <wollman@FreeBSD.org> | 1995-06-19 16:45:33 +0000 |
| commit | a1aa4b6c803d61e08c672ed170fb6dd85a00772f (patch) | |
| tree | 393189ae6d0573852a4a88c1ad9cf03f1c79436b | |
| parent | 4e33c8eed30fa60dfd518a6a7fdf5c7eceeabd57 (diff) | |
| download | FreeBSD-src-a1aa4b6c803d61e08c672ed170fb6dd85a00772f.zip FreeBSD-src-a1aa4b6c803d61e08c672ed170fb6dd85a00772f.tar.gz | |
Now that we've gone to all sorts of effort to allow TCP to cache some of
its connection parameters, we want to keep statistics on how often this
actually happens to see whether there is any work that needs to be done in
TCP itself.
Suggested by: John Wroclawski <jtw@lcs.mit.edu>
| -rw-r--r-- | sys/netinet/tcp_subr.c | 5 | ||||
| -rw-r--r-- | sys/netinet/tcp_timewait.c | 5 | ||||
| -rw-r--r-- | sys/netinet/tcp_var.h | 5 |
3 files changed, 12 insertions, 3 deletions
diff --git a/sys/netinet/tcp_subr.c b/sys/netinet/tcp_subr.c index 381824d..b2f96a2 100644 --- a/sys/netinet/tcp_subr.c +++ b/sys/netinet/tcp_subr.c @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * @(#)tcp_subr.c 8.1 (Berkeley) 6/10/93 - * $Id: tcp_subr.c,v 1.10 1995/04/09 01:29:26 davidg Exp $ + * $Id: tcp_subr.c,v 1.11 1995/05/30 08:09:58 rgrimes Exp $ */ #include <sys/param.h> @@ -333,6 +333,7 @@ tcp_close(tp) (rt->rt_rmx.rmx_rtt + i) / 2; else rt->rt_rmx.rmx_rtt = i; + tcpstat.tcps_cachedrtt++; } if ((rt->rt_rmx.rmx_locks & RTV_RTTVAR) == 0) { i = tp->t_rttvar * @@ -342,6 +343,7 @@ tcp_close(tp) (rt->rt_rmx.rmx_rttvar + i) / 2; else rt->rt_rmx.rmx_rttvar = i; + tcpstat.tcps_cachedrttvar++; } /* * update the pipelimit (ssthresh) if it has been updated @@ -366,6 +368,7 @@ tcp_close(tp) (rt->rt_rmx.rmx_ssthresh + i) / 2; else rt->rt_rmx.rmx_ssthresh = i; + tcpstat.tcps_cachedssthresh++; } } #endif /* RTV_RTT */ diff --git a/sys/netinet/tcp_timewait.c b/sys/netinet/tcp_timewait.c index 381824d..b2f96a2 100644 --- a/sys/netinet/tcp_timewait.c +++ b/sys/netinet/tcp_timewait.c @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * @(#)tcp_subr.c 8.1 (Berkeley) 6/10/93 - * $Id: tcp_subr.c,v 1.10 1995/04/09 01:29:26 davidg Exp $ + * $Id: tcp_subr.c,v 1.11 1995/05/30 08:09:58 rgrimes Exp $ */ #include <sys/param.h> @@ -333,6 +333,7 @@ tcp_close(tp) (rt->rt_rmx.rmx_rtt + i) / 2; else rt->rt_rmx.rmx_rtt = i; + tcpstat.tcps_cachedrtt++; } if ((rt->rt_rmx.rmx_locks & RTV_RTTVAR) == 0) { i = tp->t_rttvar * @@ -342,6 +343,7 @@ tcp_close(tp) (rt->rt_rmx.rmx_rttvar + i) / 2; else rt->rt_rmx.rmx_rttvar = i; + tcpstat.tcps_cachedrttvar++; } /* * update the pipelimit (ssthresh) if it has been updated @@ -366,6 +368,7 @@ tcp_close(tp) (rt->rt_rmx.rmx_ssthresh + i) / 2; else rt->rt_rmx.rmx_ssthresh = i; + tcpstat.tcps_cachedssthresh++; } } #endif /* RTV_RTT */ diff --git a/sys/netinet/tcp_var.h b/sys/netinet/tcp_var.h index 56d9f3e..c5f35d3 100644 --- a/sys/netinet/tcp_var.h +++ b/sys/netinet/tcp_var.h @@ -31,7 +31,7 @@ * SUCH DAMAGE. * * @(#)tcp_var.h 8.3 (Berkeley) 4/10/94 - * $Id: tcp_var.h,v 1.10 1995/03/16 18:15:07 bde Exp $ + * $Id: tcp_var.h,v 1.11 1995/04/09 01:29:29 davidg Exp $ */ #ifndef _NETINET_TCP_VAR_H_ @@ -277,6 +277,9 @@ struct tcpstat { u_long tcps_predack; /* times hdr predict ok for acks */ u_long tcps_preddat; /* times hdr predict ok for data pkts */ u_long tcps_pcbcachemiss; + u_long tcps_cachedrtt; /* times cached RTT in route updated */ + u_long tcps_cachedrttvar; /* times cached rttvar updated */ + u_long tcps_cachedssthresh; /* times cached ssthresh updated */ }; /* |
