Rui if you out the card in promiscuous move (e.g. via pfcount) you drop traffic as traffic is not discarded by the NIC. Unless you have balance-able traffic (i.e. if you send always the same packet it will definitively go onto the same queue) all you observe is correct. Please read some of my papers that describe how to optimize the system. Unless you do that the performance would be poor
Thanks Luca On Nov 27, 2010, at 3:52 AM, Rui wrote: > hi > > today I did a test with pfcount,latest PF_RING and a intel 10G > nic(ixgbe from intel,without PF_RING aware driver,transparent mode=0) > > I used a stress test equipment to generate the traffic, they have same > src ip and dst ip, port, so will get same RSS hash result and fall at > the same RX-queue. > > I found that performance is bad, pfcount will drop much if the traffic>800Mbps > > the performance is good If I didn't start pfcount. "ifconfig ethx" > indicate no packet drop even that throughput reachs 6Gbps > > my machine(HP DL380 G6) has 16 cores, XEON 2.5Ghz, hyperthreading,the > 10G nic was installed at a PCI-e 4X slot(I don't have 8X slot at the > moment) > > any comment about this situation? is it normal? > > thanks > rui > _______________________________________________ > Ntop-misc mailing list > [email protected] > http://listgateway.unipi.it/mailman/listinfo/ntop-misc --- Keep looking, don't settle - Steve Jobs _______________________________________________ Ntop-misc mailing list [email protected] http://listgateway.unipi.it/mailman/listinfo/ntop-misc
