summaryrefslogtreecommitdiffstats
path: root/cddl/lib
diff options
context:
space:
mode:
authorgnn <gnn@FreeBSD.org>2015-05-09 22:59:11 +0000
committergnn <gnn@FreeBSD.org>2015-05-09 22:59:11 +0000
commitf5cf32d13f0fc9d417fcd80dfa7081c492d273e6 (patch)
tree1f2d742e1cec07571fc826164351c1b80073213d /cddl/lib
parent431f70d6956d85283ece69255f2bfc5d274830ce (diff)
downloadFreeBSD-src-f5cf32d13f0fc9d417fcd80dfa7081c492d273e6.zip
FreeBSD-src-f5cf32d13f0fc9d417fcd80dfa7081c492d273e6.tar.gz
MFC: 273293
Update the TCP structure used by DTrace to show the smoothed RTT. This will allow similar functionality to SIFTR to be built with DTrace. Submitted by: Grenville Armitage
Diffstat (limited to 'cddl/lib')
-rw-r--r--cddl/lib/libdtrace/tcp.d2
1 files changed, 2 insertions, 0 deletions
diff --git a/cddl/lib/libdtrace/tcp.d b/cddl/lib/libdtrace/tcp.d
index da67e9c..9cf5cb7 100644
--- a/cddl/lib/libdtrace/tcp.d
+++ b/cddl/lib/libdtrace/tcp.d
@@ -116,6 +116,7 @@ typedef struct tcpsinfo {
uint32_t tcps_rto; /* round-trip timeout, msec */
uint32_t tcps_mss; /* max segment size */
int tcps_retransmit; /* retransmit send event, boolean */
+ int tcps_srtt; /* smoothed RTT in units of (TCP_RTT_SCALE*hz) */
} tcpsinfo_t;
/*
@@ -200,6 +201,7 @@ translator tcpsinfo_t < struct tcpcb *p > {
tcps_rto = p == NULL ? -1 : (p->t_rxtcur * 1000) / `hz;
tcps_mss = p == NULL ? -1 : p->t_maxseg;
tcps_retransmit = p == NULL ? -1 : p->t_rxtshift > 0 ? 1 : 0;
+ tcps_srtt = p == NULL ? -1 : p->t_srtt; /* smoothed RTT in units of (TCP_RTT_SCALE*hz) */
};
#pragma D binding "1.0" translator
OpenPOWER on IntegriCloud