RFC2012 saied that tcpOutSegs should excluding those containing only
retransmitted octets. But in my test, linux kernel increased the
tcpOutSegs even if only retransmitted octets is send out.
So I think this is a bug of kernel.
Refer to RFC2012, tcpOutSegs is defined as following:
tcpOutSegs OBJECT-TYPE
SYNTAX Counter32
MAX-ACCESS read-only
STATUS current
DESCRIPTION
"The total number of segments sent, including those on
current connections but excluding those containing only
retransmitted octets."
::= { tcp 11 }
Following is my patch:
--- a/net/ipv4/tcp_output.c 2006-06-30 13:37:38.000000000 -0400
+++ b/net/ipv4/tcp_output.c 2006-07-05 04:49:56.000000000 -0400
@@ -462,7 +462,8 @@ static int tcp_transmit_skb(struct sock
if (skb->len != tcp_header_size)
tcp_event_data_sent(tp, skb, sk);
- TCP_INC_STATS(TCP_MIB_OUTSEGS);
+ if (!(tcb->sacked & TCPCB_LOST))
+ TCP_INC_STATS(TCP_MIB_OUTSEGS);
err = icsk->icsk_af_ops->queue_xmit(skb, 0);
if (likely(err <= 0))
Signed-off-by: Wei Yongjun <[EMAIL PROTECTED]>
-
To unsubscribe from this list: send the line "unsubscribe netdev" in
the body of a message to [EMAIL PROTECTED]
More majordomo info at http://vger.kernel.org/majordomo-info.html
