Thanks Mark,
I started with WinSock, but it is not capable of getting 6 GB/s data
transfer speeds, or at least I could not make it getting that amount of
data per second. Winpcap does it for me. However, sometimes I need only
one set of 64 packets received in one go (that is one image of my
detector sent to PC) and I get stalled in the middle of the transfer
until timeout occurs.
Anton
Ho Anton,
My first question to you would be:
WHY are you using WinPcap to receive UDP packets?
This sounds like a job for a winsock application....
- Mark Pizzolato
*From:* [email protected]
[mailto:[email protected]] *On Behalf Of *Anton Tremsin
*Sent:* Friday, January 28, 2011 11:50 AM
*To:* [email protected]
*Subject:* [Winpcap-users] Delay receiving packets - wrong
functionality ofpcap_setmintocopy()
I hope someone can help my problem receiving packets in Windows7
I am sending data by UDP packets from an FPGA through 10GB card
(Chelsio). Using VC++ 2010 to compile code to receive them.
All packets arrive, no losses seen, but the problem is with the proper
*operation of pcap_setmintocopy() function.*
*I send 64 packets with 8234 bytes each. Receiving them through
pcp_next_ex() and I only get 31 packets (sometimes 62, sometimes 47,
50 packets) before the timeout occurs. After timeout the rest of the
packets arrives.
*
I set the minimum amount of data in the kernel buffer that causes a
read from the application to return (unless the timeout expires) to be
1 byte or it to be all 8234x64 bytes, no difference. Looks like the
setmintocpy function has no effect on my kernel buffer to be copied to
my application. If I send another set of 64 packets - data arrives
into pcp_next_ex(), still only in lamp of 31 (62, 47,50) packets
That is a big problem for my application.
*Is there anything I am doing wrong or need to change something in the
system/driver to make setmintocopy function to operate properly?
*
Thanks a lot for your help,
Anton Tremsin
--
Anton S. Tremsin, Ph.D.
Space Sciences Laboratory
University of California at Berkeley
Berkeley, CA 94720
Tel: (510) 642 4554
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--
Anton S. Tremsin, Ph.D.
Space Sciences Laboratory
University of California at Berkeley
Berkeley, CA 94720
Tel: (510) 642 4554
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https://www.winpcap.org/mailman/listinfo/winpcap-users
