Hi Dominik,
Soeur sourire<http://www.youtube.com/artist/Soeur_Sourire?feature=watch_video_title>dominique *http://www.youtube.com/watch?v=0a0cvKMlAZw&NR=1*** I hope that you like the attached music, the words has your name embedded, and I hope that it make you happy. Pang-Hsin Wang On Thu, May 19, 2011 at 7:53 AM, Reinhard, Dominik <[email protected]>wrote: > Hi, > > > > I’m currently working on a stream analyzing tool using winpcap. > Unfortunately I’m facing the fact of packetloss on my PC... > > > > The Setup: 4 streams á 40Mbit/s over a 1GBit/s switch connected to my PC > via 3Com 3C996B Gigabit or Intel 82567LM-3 Gigabit NIC (newest drivers of > course). The system is powered by a Q9400 with plenty of ram. The CPU usage > is below 20%, half of it is used by the kernel. The transport-protocol used > is not known by windows, so the frames should not be processed any further. > > > > While the hardware should be capable of receiving 160Mbit/s, I’m not able > to receive all frames correctly by using Wireshark or my tool. As all frames > are numbered, I can see nondeterministic drops of 0-10 frames per second on > all streams (The frames are fixed size of 1060 byte). > > > > As far as my application goes I tried optimizing kernel- & user-space > buffers (both up to 50mb) and only reading the first 32 byte of every frame > (pcap_open_live parameter). Also there was no difference between > pcap_next_ex, pcap_loop and pcap_dispatch. pcap_stats_ex also tells me no > frames have been dropped. The DPC latency without load is about 10µs, using > Wireshark or my analyzer (default buffer) will raise the latency up to 30µs. > Increasing the buffer size will raise the latency by factor 25. Also > applying a filter and only capture one of the streams will result in > packetloss... > > > > Ideas, anyone? > > > > Kind regards, > > Dominik > > ********************** > ** LEGAL DISCLAIMER ** > ********************** > > This E-mail message and any attachments may contain > legally privileged, confidential or proprietary > information. If you are not the intended recipient(s), > or the employee or agent responsible for delivery of > this message to the intended recipient(s), you are > hereby notified that any dissemination, distribution > or copying of this E-mail message is strictly > prohibited. If you have received this message in > error, please immediately notify the sender and > delete this E-mail message from your computer. > > > _______________________________________________ > Winpcap-users mailing list > [email protected] > https://www.winpcap.org/mailman/listinfo/winpcap-users > >
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