Re: [dpdk-users] what is the average latency you get for io forwarding from dpdk?

[dave seddon <dave.seddon.ca@gmail.com>]

There's an interesting video about speed:
https://youtu.be/ne3svryuthI

On Jan 17, 2017 12:28 AM, "Marco Kwok" <maruko.kwok@gmail.com> wrote:

> Hello all,
>
> I wonder if anyone could get a relative low latency from dpdk on 1gb link.
>
> When using testpmd, an packet of 150 bytes is sent, packet is received by
> the port and loopback to the sender.
> I usually could get 50us for io forward. Sometime it can be as fast as 3us.
> However it is too slow to be used for switching application.
>
> My test platform is on a intel NUC NUC5I5RYH, which has i5 5250U 1.6GHz,
> 16GB DDR3 and i218-V network chip. dpdk 16.07.2
>
>
> I have done the following things try to get a better latency with no luck:
> -setup 1G hugepages
> -disable cpu frequency scaling to make sure cpu runs at max speed of 2.7GHz
> -isolate a cpu core from kernel task scheduler by isolcpus
> -setting the burst size of testpmd to 1
>
> Guys, I really want your input. I don't need high throughput but low
> latency. Does anyone of you have been able to achieve a lower latency with
> dpdk? I don't see the advantage I have taken from dpdk now.
>
> Best,
> Mark
>