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Update the TCP structure used by DTrace to show the smoothed RTT.

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This will allow similar functionality to SIFTR to be built with DTrace.

Submitted by:	Grenville Armitage
MFC after:	2 weeks
This commit is contained in:
George V. Neville-Neil 2014-10-19 23:13:16 +00:00
parent 199de3d71a
commit bd537a28cc
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=273293
1 changed files with 2 additions and 0 deletions
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2
cddl/lib/libdtrace/tcp.d
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@ -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; /* XXX */
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 "1.6.3" translator