From: Stephen Hemminger <stephen@networkplumber.org>
To: Marco Kwok <maruko.kwok@gmail.com>
Cc: users@dpdk.org
Subject: Re: [dpdk-users] what is the average latency you get for io forwarding from dpdk?
Date: Wed, 18 Jan 2017 08:55:35 -0800 [thread overview]
Message-ID: <20170118085535.4bcfd124@xeon-e3> (raw)
In-Reply-To: <CAE56PLtqN7o5bSuJKjYXg_rDs7m0WjOm=kX9EQ_zCWbE1tKzdA@mail.gmail.com>
On Tue, 17 Jan 2017 16:28:01 +0800
Marco Kwok <maruko.kwok@gmail.com> wrote:
> 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
You may need a faster cpu, and PCI gen3 support (so that NIC goes direct to CPU cache).
Also i218-V uses E1000 driver which has not been optimized much.
> 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
Disable hyper-threading
Set burst size to 32, some drivers optimize for this.
Use different prefetch values
prev parent reply other threads:[~2017-01-18 16:55 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-01-17 8:28 Marco Kwok
2017-01-17 14:41 ` dave seddon
2017-01-18 16:03 ` Pavel Shirshov
2017-01-18 16:55 ` Stephen Hemminger [this message]
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