Re: UDP checksum elimination

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   From: sai narasimhamurthy <sai_narasi@yahoo.com>
   Date: Tue, 1 Jul 2003 19:59:59 -0700 (PDT)

   I have managed to send UDP packets with the checksum
   filed set to "0". Inspite of that I dont seem to be
   getting any performance improvements at the recieving
   side.(I am using Netperf).

The checksum is for free during the copy of the data from userspace.
The copy is still occuring from userspace during the write()/sendmsg()
calls even once you've turned off the checksums, and that's where most
of the overhead is from.
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