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Add an option to use rfc6675 based pipe/inflight bytes calculation in newreno.

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MFC after:	    3 weeks
Sponsored by:	    Limelight Networks
This commit is contained in:
Hiren Panchasara 2015-12-09 08:53:41 +00:00
parent f81bc34eac
commit a934d06194
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=292012
1 changed files with 10 additions and 4 deletions
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14
sys/netinet/cc/cc_newreno.c
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@ -214,6 +214,9 @@ newreno_cong_signal(struct cc_var *ccv, uint32_t type)
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);
}