[lkml]   [1998]   [Nov]   [11]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: TCP, congestion window & retransmission
On Tue, 10 Nov 1998, David S. Miller wrote:

>traces I had while I did most of my TCP output engine rewrite. I
>always kept forgetting to go back and see if it was correct to do slow
>start or not during timeout based recovery.

According to the RFC2001 in case of duplicate acks or timeout TCP has to
do slow-start until TCP has not the congestion window open to the value of
sstresh (set to max(cwnd/2,1) before -> at timeout time). When the
congestion window is >= sstrash, TCP must go in congestion avoidance
incrementing cwnd of segsize*segsize/cwnd and at most incrementing of 1
unit every RTT (this way cwnd increase liner and not exponential).

Andrea Arcangeli

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
Please read the FAQ at

 \ /
  Last update: 2005-03-22 13:45    [W:0.063 / U:5.320 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site