On 12/28/05, Aritz Bastida <[EMAIL PROTECTED]> wrote: > Hi everybody: > > I need to use pktgen for sending packets at very high speed to another > machine, in order to test it under heavy network traffic. All my > previous injection test were done with a dual Pentium III 800 MHz. As > I needed a more powerful machine I got a Pentium 4 but the results are > quite similar. > > The new machine specifications are: > > Processor: Pentium 4 2.8 GHz > Kernel: 2.6.13 / 2.6.14.5 (I've tested both of them) > 2 NICs: e1000 (Intel 82541GI/PI and Intel 82547GI) > Bus: PCI-X, I think (that's what it says in lspci, but I'm > not sure how to find the bus > speed and all that) > > The results with pktgen are: > pkt_size=100 > count=10000000 > clone_skb=0 > delay=0 > pktgen.packet_rate (pps): 170057 > pktgen.throughput (Mbps): 136 > pktgen.total_time (us): 58803762 > pktgen.work_time (us): 57141059 > pktgen.idle_time (us): 1662703 > -------------------------------------------------------------------------------------- > pkt_size=100 > count=10000000 > clone_skb=1000000 > delay=0 > pktgen.packet_rate (pps): 323602 > pktgen.throughput (Mbps): 258 > pktgen.total_time (us): 30902126 > pktgen.work_time (us): 29325060 > pktgen.idle_time (us): 1577066 > > These results are similar to the ones I got with the Pentium III. I > can't reach even 400kpps. With another machine, a dual AMD Opteron, I > can send as fast as 650kpps but unfortunately that is the machine > being tested. In the pktgen paper says "A single flow of 1.48Mpps is > seen with a Xeon 2.67 GHz using a patched e1000 driver (64 byte > packets)" [1]. Well, I don't know how much faster the Intel Xeon is, > but I do have a fast machine, and I do have an e1000 NIC. > > So, if anyone can help me, please help. It's maybe that I need the > patch for the e1000 to achieve those high numbers. However, I can't > find that patch, so if anyone knows about it, please tell me where to > find it. > > Thank you. Regards > Aritz > > [1] Paper from Linux-Kongress in Erlangen 2004. > > ftp://robur.slu.se/pub/Linux/net-development/pktgen-testing/pktgen_paper.pdf
The patches mentioned are at this site above, in the net-development directory, if i'm not mistaken. Also, you'll get a big improvement from running a UP kernel with packetgen. reply with output of lspci -vvv -xxx -s <your ethernet adapter's slot> and ethtool -d ethX output and we can tell your bus speed from those. also send ethtool -S ethX output after running your pktgen, we're looking to see if you need to turn off flow control. running an x86_64 kernel will help your pktgen numbers on the P4 as well. Don't know why fully yet. - To unsubscribe from this list: send the line "unsubscribe netdev" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html
