On 08/28/2018 11:39 PM, Wiles, Keith wrote:
Which version of Pktgen? I just pushed a patch in 3.5.3 to fix a performance
problem.
I use Pktgen verion 3.0.0, indeed it is O.k as far as I have one core.
(10 Gb/s) but when I increase the number of core (one core per queue)
then I loose some performance (roughly 8.5 Gb/s for 8-core). In my
scenario Pktgen shows it is generating at line rate, but receiving 8.5 Gb/s.
Is it because of Pktgen???
On Aug 28, 2018, at 12:05 PM, Saber Rezvani <irsa...@zoho.com> wrote:
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 :(
Regards,
Keith
