Hi Pawel, Thanks for your reply. Sadly, assigning 1 core per port didn't change anything.
As for the NUMA nodes, If I understand correctly there is a node for each socket and I'm only using 1 socket with 4 cores and lscpu is showing me only 1 node. I don't think I can do anything about that. Correct me if I'm wrong on this one. I'm definitely going to try a older version and see if it works properly. Thanks for your help Alexandre F. > -----Original Message----- > From: Wodkowski, PawelX [mailto:pawelx.wodkowski at intel.com] > Sent: Wednesday, January 28, 2015 9:15 AM > To: Alexandre Frigon; dev at dpdk.org; keith.wiles at windriver.com > Subject: RE: Pktgen-DPDK rate and traffic inconsistency problem > > > -----Original Message----- > > From: dev [mailto:dev-bounces at dpdk.org] On Behalf Of Alexandre Frigon > > Sent: Tuesday, January 27, 2015 8:31 PM > > To: dev at dpdk.org > > Subject: [dpdk-dev] Pktgen-DPDK rate and traffic inconsistency problem > > > > Hi all, > > > > I'm using dpdk 1.8 and pktgen-dpdk 2.8 to generate traffic on a > > back-to-back setup both equipped with 82599EB 10-Gigabit NIC. > > The problem is when I start it, pktgen indicates 10000Mbits/s Tx with > > 64B packet size, but I'm receiving about 15% of it on the other end. > > This percentage seems to be proportional with the packet size. > > > > e.g. > > Using nload to read Rx traffic > > Pktgen: Tx: 10000Mbits/s ==> Other end: Rx 1660 > Mbits/s > > Rate: 100% > > Pkt size: 64B > > > > > > e.g 2 > > Pktgen: Tx: 10000Mbits/s ==> Other end: Rx 9385 > Mbits/s > > Rate: 100% > > Pkt size: 1518B > > > > > > Pktgen is started with this command on a Xeon(R) CPU E31270 @ 3.40GHz > > ./app/pktgen -c 1f -n 3 --proc-type auto --socket-mem 1024 > > --file-prefix pg -- -p > > 0x3 -P -N -m "[1:3].0, [2:4].1" > > From past experience I don't assign more than 1 core per port. It had some > race conditions issues and one core I capable to RX or TX full 10G. > Also check if you assign proper cores/memory for your NICs (the same > NUMA node). > > > > > Is there something I'm not configuring correctly or something I have miss? > > > > Also, the % rate is acting strangely since anything above 50% doesn't > > change the Tx rate and anything below is modifying it > > e.g Tx: 10000Mbits/s 5000Mbits/s > > %Rate: >=50% 25% > > > > > > Actually I am getting exactly opposite results :) If I set rate to 50% I get > MBits/s Rx/Tx : 0/9942 9942/0 9942/9942 > > For 10%: > MBits/s Rx/Tx : 0/1997 1997/0 1997/1997 > > Which is about 2x set :D > > Additionaly I am getting message when "start 0" -> "stop 0" -> "start 0" is > issued > PMD: ixgbe_dev_rx_init(): forcing scatter mode > > So there is definitely something wrong there but don't know where. > Another issue I encountered is build system that fail when building out-of- > tree. > > Till this is fixed you can try version 2.7.1 that is working for me. > > Pawel
