Hi, Can you check that the threads you use for handling the queues are on the same socket as the card ?
cat /sys/class/net/<interface name>/device/numa_node will give you the node. Fran?ois-Fr?d?ric > -----Message d'origine----- > De?: dev [mailto:dev-bounces at dpdk.org] De la part de Michael Quicquaro > Envoy??: jeudi 9 janvier 2014 20:28 > ??: dev at dpdk.org > Cc?: mayhan at mayhan.org > Objet?: [dpdk-dev] Rx-errors with testpmd (only 75% line rate) > > Hello, > My hardware is a Dell PowerEdge R820: > 4x Intel Xeon E5-4620 2.20GHz 8 core > 16GB RDIMM 1333 MHz Dual Rank, x4 - Quantity 16 Intel X520 DP 10Gb DA/SFP+ > > So in summary 32 cores @ 2.20GHz and 256GB RAM > > ... plenty of horsepower. > > I've reserved 16 1GB Hugepages > > I am configuring only one interface and using testpmd in rx_only mode to > first see if I can receive at line rate. > > I am generating traffic on a different system which is running the netmap > pkt-gen program - generating 64 byte packets at close to line rate. > > I am only able to receive approx. 75% of line rate and I see the Rx-errors > in the port stats going up proportionally. > I have verified that all receive queues are being used, but strangely > enough, it doesn't matter how many queues more than 2 that I use, the > throughput is the same. I have verified with 'mpstat -P ALL' that all > specified cores are used. The utilization of each core is only roughly > 25%. > > Here is my command line: > testpmd -c 0xffffffff -n 4 -- --nb-ports=1 --coremask=0xfffffffe > --nb-cores=8 --rxd=2048 --txd=2048 --mbcache=512 --burst=512 --rxq=8 > --txq=8 --interactive > > What can I do to trace down this problem? It seems very similar to a > thread on this list back in May titled "Best example for showing > throughput?" where no resolution was ever mentioned in the thread. > > Thanks for any help. > - Michael
