Hello, 28/05/2013 04:26, Shinae Woo : > ./build/l2fwd -cf -n3 -- -p3 > ./build/l2fwd -cf -n3 -- -pf > > But both cases, the aggregated performance are not scale. [..] > The question is that > 1. How I can achieve each port receiving full 14.88Mpps ? > What might be the bottleneck in current environment? > 2. Why the performance using multiple ports is not scale? > I guess doubling ports shows the doubling the receiving performance, > but it shows not. I am curious about what is limiting the packet > receivng performance.
In order to scale with line-rate performance, you probably have to adjust the configuration to your hardware. Several parameters should be considered: - PCIe bus (is it fast enough ?) - NUMA sockets (copy between NUMA nodes could slow forwarding) - CPU threads (classic SMP is better than hyperthreading) To make it short, you could check your PCI bus and your CPU configuration. For the latter, /proc/cpuinfo should provide enough information with fields "physical id" and "core id". -- Thomas
