Author: hiren
Date: Wed Dec 9 08:53:41 2015
New Revision: 292012
URL: https://svnweb.freebsd.org/changeset/base/292012
Log:
Add an option to use rfc6675 based pipe/inflight bytes calculation in newreno.
MFC after: 3 weeks
Sponsored by: Limelight Networks
Modified:
head/sys/netinet/cc/cc_newreno.c
Modified: head/sys/netinet/cc/cc_newreno.c
==============================================================================
--- head/sys/netinet/cc/cc_newreno.c Wed Dec 9 07:56:40 2015
(r292011)
+++ head/sys/netinet/cc/cc_newreno.c Wed Dec 9 08:53:41 2015
(r292012)
@@ -214,6 +214,9 @@ newreno_cong_signal(struct cc_var *ccv,
static void
newreno_post_recovery(struct cc_var *ccv)
{
+ int pipe;
+ pipe = 0;
+
if (IN_FASTRECOVERY(CCV(ccv, t_flags))) {
/*
* Fast recovery will conclude after returning from this
@@ -224,10 +227,13 @@ newreno_post_recovery(struct cc_var *ccv
*
* XXXLAS: Find a way to do this without needing curack
*/
- if (SEQ_GT(ccv->curack + CCV(ccv, snd_ssthresh),
- CCV(ccv, snd_max)))
- CCV(ccv, snd_cwnd) = CCV(ccv, snd_max) -
- ccv->curack + CCV(ccv, t_maxseg);
+ if (V_tcp_do_rfc6675_pipe)
+ pipe = tcp_compute_pipe(ccv->ccvc.tcp);
+ else
+ pipe = CCV(ccv, snd_max) - ccv->curack;
+
+ if (pipe < CCV(ccv, snd_ssthresh))
+ CCV(ccv, snd_cwnd) = pipe + CCV(ccv, t_maxseg);
else
CCV(ccv, snd_cwnd) = CCV(ccv, snd_ssthresh);
}
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