On 08/28/2018 08:31 PM, Stephen Hemminger wrote:
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!
Indeed pktgen says it is generating traffic at line rate, but receiving
less than 10 Gb/s. So, it that case there should be something that
causes the reduction in throughput :(
