On 06/06/2015 01:05 AM, Perf Tech wrote:
I have a PC with 3 NICs (eth0 is Intel 82579LM NIC, eth1 is 82574L), OS is ubuntu 12.04 server. I connected eth0 and eth1 with a ethernet cable and both ports are up.Trying to find out how fast trafgen(0.5.9-rc4) can send packets on this system. # ./trafgen --dev eth0 --conf tmp2.txt --cpp 4 packets to schedule 292 bytes in total Running! Hang up with ^C! I am monitoring "ifconfig eth0" with a monitoring program that I have used many years, the issue is, trafgen is only sending pcap at a rate 129000 packets/sec with data rate of 79Mbps. I had expected it to be a long higher.
What kernel and NIC driver do you use? Did you do any particular tuning settings? E.g. a starting point could be: http://netoptimizer.blogspot.ch/2014/09/network-setup-for-accurate-nanosec.html Also, if your config uses checksumming, it's done in trafgen in software, so if you want to test a simple minimal config, you could use a static buffer as a start.
Did I run the command wrong? Thanks
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