On 2007/04/12 , at 20:19, Eric Dumazet wrote:
On Thu, 12 Apr 2007 10:59:19 -0700
Ben Greear <[EMAIL PROTECTED]> wrote:
Here is a tcpdump of the connection in the stalled state. As you
can see by
the 'time' output, it's running at around 100,000 packets per
second. tcpdump
dropped the vast majority of these. Based on the network
interface stats, I
believe both sides of the connection are sending acks at about the
same
rate (about 160kpps when tcpdump is not running it seems).
Warning : tcpdump can lie, telling you packets being transmited
several time.
Maybe you have further pointers how come that tcpdump lies about
duplicated packets?
Thanks a lot,
Daniel
And yes, tcpdump slow things down because of enabling accurate
timestamping of packets.
10:46:46.541490 IP 20.20.20.20.33011 > 20.20.20.30.33012: . ack 48
win 6132 <nop,nop,timestamp 85158912 84963208>
10:46:46.541494 IP 20.20.20.30.33012 > 20.20.20.20.33011: . ack 1
win 114 <nop,nop,timestamp 85158912 84963208>
10:46:46.541567 IP 20.20.20.30.33012 > 20.20.20.20.33011: . ack 1
win 114 <nop,nop,timestamp 85158912 84963208>
10:46:46.541653 IP 20.20.20.30.33012 > 20.20.20.20.33011: . ack 1
win 114 <nop,nop,timestamp 85158912 84963208>
10:46:46.541886 IP 20.20.20.30.33012 > 20.20.20.20.33011: . ack 1
win 114 <nop,nop,timestamp 85158912 84963208>
10:46:46.541891 IP 20.20.20.20.33011 > 20.20.20.30.33012: . ack 48
win 6132 <nop,nop,timestamp 85158912 84963208>
10:46:46.541895 IP 20.20.20.30.33012 > 20.20.20.20.33011: . ack 1
win 114 <nop,nop,timestamp 85158912 84963208>
10:46:46.541988 IP 20.20.20.30.33012 > 20.20.20.20.33011: . ack 1
win 114 <nop,nop,timestamp 85158912 84963208>
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