> -----Original Message----- > From: Zachary.Jen at cas-well.com [mailto:Zachary.Jen at cas-well.com] > Sent: Friday, July 11, 2014 4:05 AM > To: dev at dpdk.org > Cc: Richardson, Bruce; Alan.Yu at cas-well.com > Subject: Re: [dpdk-dev] DPDK Performance issue with l2fwd > > Hi Bruce: > > Thanks for your suggestion. > I have tried to use testpmd to test 16 ports today. > The result is so Interested. It can work, although some ports get low > performance (only get 80%).
For small packets, PCI bandwidth can be an issue. Do you get 80% of line rate with 64-byte packets or with larger packet sizes? How many testpmd cores were you using, and what parameters were you setting in testpmd? > > Besides, I also do another test in l2fwd. > I tried to use 82580 * 16 ports in the same platform with l2fwd test. > The same situation happened again. > So, it seems a big bug hidden in the l2fwd.
