On Tue, 28 Aug 2018 17:34:27 +0430 Saber Rezvani <irsa...@zoho.com> wrote:
> Hi, > > > I have run multi_process/symmetric_mp example in DPDK example directory. > For a one process its throughput is line rate but as I increase the > number of cores I see decrease in throughput. For example, If the number > of queues set to 4 and each queue assigns to a single core, then the > throughput will be something about 9.4. if 8 queues, then throughput > will be 8.5. > > I have read the following, but it was not convincing. > > http://mails.dpdk.org/archives/dev/2015-October/024960.html > > > I am eagerly looking forward to hearing from you, all. > > > Best wishes, > > Saber > > Not completely surprising. If you have more cores than packet line rate then the number of packets returned for each call to rx_burst will be less. With large number of cores, most of the time will be spent doing reads of PCI registers for no packets!
