tcpdump mailing list archives

Re: HUGE packet-drop


From: rixed () happyleptic org
Date: Mon, 7 Feb 2011 18:40:40 +0100

I've been using Squeeze libpcap (ie. 1.1.1) to capture some traffic from
a gigabit ethernet adapter today, connected straight to another gigabit
adapter of another host that was sending a pcap file with tcpreplay.
receive buffer was resized up to 60Mb (with proper rmem_max).

And I also experienced a huge packet drop whenever the throughput raised
above 50MB/sec (up to 100MB/sec). By huge, I mean almost 50% of total
received packets (ie. one third of the packets were lost according to
pcap stats).

So we are on the same boat :-(
I will continue working on this testbed, if I encounter something
interresting I let you know. Please tell us if you learn something
relevant.

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