Hi it is strange the cluster does not recognize the actual number of rx packets, and it treats ACK packets in the same way of others. Could you provide a pcap with the traffic you are using in order to reproduce this issue?
Thanks Alfredo On Jul 29, 2013, at 7:37 AM, 박주건 <[email protected]> wrote: > Dear all, > > I’m testing performance of PF_RING with the DNA/libzero license using STC > (Spirent Test Center). > I constructed the following environment to perform the test. > STC ---- pfdnacluster_mt_rss_frwd app.(dna0<->dna1) --- STC > > The STC transmits the busty TCP/IP packets (20G bi-directional) to the > PF_RING application, and then the application just passes (without any > additional manipulation) the incoming packets to the STC RX port. > > In this test, I have encountered a very strange issue with packet loss during > bypass a particular type of packets. All packets are bypassed normally except > the packets with TCP ACK flag. > > However, when the STC sends the packets with TCP ACK flag (2,349,625 packets > with ACK flag), the PF_RING application drops a number of incoming packets > (around 10%), and it occurs even in the lower bandwidth settings. All others > (SYN, PSH, FIN, RST) are flowed pretty well. > Furthermore, dna_cluster_stats(), which is used to acquired statistical data, > does not seem to recognize the actual number of RX packets. > I have already checked that the STC operates normally via DPDK platform. > > Do you have any ideas what the problem is ,and how to fix it? > > > Configuration details are as follows: > > Xeon X5690 with Intel ixgbe 82599 NIC, 2.6.32-220.13.1.el6.x86_64 > > pf_ring and ixgbe drivers with: > insmod pf_ring.ko transparent_mode=2 enable_tx_capture=0 > insmod ixgbe.ko allow_unsupported_sfp=1,1 RSS=8,8 > > --------------------------------------------- > # cat /proc/net/pf_ring/info > PF_RING Version : 5.6.0 ($Revision: exported$) > total rings : 26 > > Standard (non DNA) Options > Ring slots : 4096 > Slot version : 15 > Capture TX : No [RX only] > IP Defragment : No > Socket Mode : Standard > Transparent mode : No [mode 2] > Total plugins : 0 > Cluster Fragment Queue : 0 > Cluster Fragment Discard : 0 > ---------------------------------------------- > > # cat /proc/net/pf_ring/dev/dna0/info > Name: dna0 > Index: 122 > Polling Mode: DNA > Type: Ethernet > Family: Intel ixgbe 82599 > Max # TX Queues: 8 > ---------------------------------------------- > > cat 6055-dna0.11 > Bound Device(s) : > Active : 1 > Breed : DNA > Sampling Rate : 1 > Capture Direction : RX+TX > Socket Mode : TX only > Appl. Name : pfdnacluster-dna0-channel-0 > IP Defragment : No > BPF Filtering : Disabled > # Sw Filt. Rules : 0 > # Hw Filt. Rules : 0 > Poll Pkt Watermark : 128 > Num Poll Calls : 0 > Channel Id : 0 > Num RX Slots : 8192 > Num TX Slots : 8192 > Tot Memory : 25952256 bytes > ---------------------------------------------- > _______________________________________________ > Ntop-misc mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-misc _______________________________________________ Ntop-misc mailing list [email protected] http://listgateway.unipi.it/mailman/listinfo/ntop-misc
