Fernando pfsend is a test utility and we have not planned to make it a network testing tool. However we're willing to improve it. The tool uses -r properly basically with self-generated traffic (i.e. no -f). With -f it still assumes that the pcap file contains 64 byte packets (it prints that on screen), that does not seem to be your case.
The demo driver is just a way to limit the tool duration and it has nothing to do with your tests. Bottom line: feel free to patch the tool and adapt it at your needs. In that case please share the code with us so we can commit it Thanks Luca On Dec 15, 2011, at 12:00 PM, Fernando Mayo wrote: > Hi everyone, > > I just installed the more recent (demo) version of PF_RING DNA driver for > ixgbe, in order to make stress tests on a new router platform. > > Everything is working fine, except that pfsend utility is usually not sending > packet at the configured rate. Don't know if this is related to the demo > version of the driver... > > I am trying to transmit a capture file (containing five packets) at a rate of > 1 Gbps: on the first example shown below I am getting more than 7 Mpps which > is much more than the rate that pfsend utility is calculating (1488095 pps). > > On the second example, the rate fits to the calculated rate using exactly the > same parameters. > > Any ideas? > > First (unsuccessful) example: > > root@trafficgen:/home/fmayo/PF_RING/userland/examples# ./pfsend -i dna0 -f > /home/fmayo/traffic_test.cap -n 0 -r 1 > Sending packets on dna0 > ################################################### > # ERROR: You do not seem to have a valid DNA license for dna0. > # ERROR: Please get one at http://shop.ntop.org/. > ################################################### > # We're now working in demo mode with packet capture > # and transmission limited to 5 minutes > ################################################### > Using PF_RING v.5.2.1 > Estimated CPU freq: 3670602000 Hz > Number of 64-byte Packet Per Second at 1.00 Gbit/s: 1488095.24 > Read 5 packets from pcap file /home/fmayo/traffic_test.cap > TX rate: [current 7'627'165.74 pps/6.47 Gbps][average 7'627'165.74 pps/6.47 > Gbps][total 7'627'181.00 pkts] > TX rate: [current 7'638'615.12 pps/6.48 Gbps][average 7'632'890.61 pps/6.47 > Gbps][total 15'266'285.00 pkts] > TX rate: [current 7'722'359.60 pps/6.55 Gbps][average 7'662'714.28 pps/6.50 > Gbps][total 22'989'162.00 pkts] > ...... > > Second (successful) example: > > root@trafficgen:/home/fmayo/PF_RING/userland/examples# ./pfsend -i dna0 -f > /home/fmayo/traffic_test.cap -n 0 -r 1 > Sending packets on dna0 > ################################################### > # ERROR: You do not seem to have a valid DNA license for dna0. > # ERROR: Please get one at http://shop.ntop.org/. > ################################################### > # We're now working in demo mode with packet capture > # and transmission limited to 5 minutes > ################################################### > Using PF_RING v.5.2.1 > Estimated CPU freq: 3693248000 Hz > Number of 64-byte Packet Per Second at 1.00 Gbit/s: 1488095.24 > Read 5 packets from pcap file /home/fmayo/traffic_test.cap > TX rate: [current 1'463'372.07 pps/1.24 Gbps][average 1'463'372.07 pps/1.24 > Gbps][total 1'463'375.00 pkts] > TX rate: [current 1'402'045.15 pps/1.19 Gbps][average 1'432'708.30 pps/1.21 > Gbps][total 2'865'451.00 pkts] > ..... > > root@trafficgen:/proc/net/pf_ring/dev/dna0# cat > /proc/net/pf_ring/dev/dna0/info > Name: dna0 > Index: 10 > Address: 00:12:C0:80:15:3E > Polling Mode: DNA > Type: Ethernet > Family: Intel ixgbe 82599 > Max # TX Queues: 72 > # Used RX Queues: 1 > > > Thanks! > Best regards > Fernando Mayo > _______________________________________________ > Ntop-misc mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-misc
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