d/freebsd-nq
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

tcp rack: improve initialisation of retransmit timeout

Browse Source 
When the TCP is in the front states, don't take the slop variable
into account. This improves consistency with the base stack.

Reviewed by:		rrs@
Differential Revision:	https://reviews.freebsd.org/D30230
MFC after:		1 week
Sponsored by:		Netflix, Inc.
This commit is contained in:
Michael Tuexen 2021-05-12 17:58:56 +02:00
parent c0dbc49ab3
commit 251842c639
1 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
sys/netinet/tcp_stacks/rack.c
View File

@ -6606,8 +6606,13 @@ rack_convert_rtts(struct tcpcb *tp)
tp->t_rttvar += frac;
}
}
RACK_TCPT_RANGESET(tp->t_rxtcur, RACK_REXMTVAL(tp),
rack_rto_min, rack_rto_max);
tp->t_rxtcur = RACK_REXMTVAL(tp);
if (TCPS_HAVEESTABLISHED(tp->t_state)) {
tp->t_rxtcur += TICKS_2_USEC(tcp_rexmit_slop);
}
if (tp->t_rxtcur > rack_rto_max) {
tp->t_rxtcur = rack_rto_max;
}
}
static void