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Message-ID: <001401c286e3$410f5fe0$d773a018@OMIT>
From: "omit_ECE" <omit@rice.edu>
To: <linux-kernel@vger.kernel.org>
Subject: A question in decreasing cwnd.
Date: Thu, 7 Nov 2002 23:56:52 -0500
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Hi,

In tcp_input.c, 

/* Decrease cwnd each second ack. */
static void tcp_cwnd_down(struct tcp_opt *tp)
{
     int decr = tp->snd_cwnd_cnt + 1;

     tp->snd_cwnd_cnt = decr&1;
     decr >>= 1;

     if (decr && tp->snd_cwnd > tp->snd_ssthresh/2)
          tp->snd_cwnd -= decr;

     tp->snd_cwnd = min(tp->snd_cwnd, tcp_packets_in_flight(tp)+1);
     tp->snd_cwnd_stamp = tcp_time_stamp;
}

Could anyone explain what does that mean, please?
Thank you.

YuZen
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