Wireshark-users: Re: [Wireshark-users] Query regarding Wireshark
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From: Jeff Morriss <jeff.morriss.ws@xxxxxxxxx>
Date: Mon, 28 Mar 2011 10:46:53 -0400
Martin Visser wrote:
Hmmm, obviously even on a multi-core machine the network drivers must be able to present packets to the OS network stack in the order on the wire. What mechanism allows libpcap to do thing in a different order. If what you are saying is correct, that has to be a major issue in libpcap?
Modern Solaris drivers are pretty aggressive about using multiple DMA channels to parallelize transfers to/from their NICs. It's probably the only way to saturate a 10-G NIC with their (numerous but) slow SPARC CPUs, but it can cause nightmares for software that was designed back when (e.g., UDP) packets rarely got out of order.