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From: Stephen Hemminger <stephen@networkplumber.org>
To: Ferruh Yigit <ferruh.yigit@intel.com>
Cc: DPDK <dev@dpdk.org>
Subject: Re: [dpdk-dev] KNI discussion in userspace event
Date: Fri, 28 Oct 2016 09:25:25 -0700	[thread overview]
Message-ID: <20161028092525.696652d4@xeon-e3> (raw)
In-Reply-To: <8c7f9d25-b042-6b7e-b197-7873ea7425ef@intel.com>

On Fri, 28 Oct 2016 15:31:50 +0100
Ferruh Yigit <ferruh.yigit@intel.com> wrote:

> Discussed alternatives were:
> * Tun/Tap
> This won't be as fast as KNI and performance is an issue.


That is a myth. Both require the some number of copies.
TUN/TAP copies is a syscall and KNI copies is a kthread.
Actually, the KNI method is worse because it has kernel thread
always running chewing a CPU. I.e it is pure poll mode.

  parent reply	other threads:[~2016-10-28 16:25 UTC|newest]

Thread overview: 11+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-10-28 14:31 Ferruh Yigit
2016-10-28 15:03 ` Igor Ryzhov
2016-10-28 15:13 ` Thomas Monjalon
2016-10-28 15:51   ` Richardson, Bruce
2016-10-28 16:13     ` Thomas Monjalon
2016-10-28 17:29       ` Igor Ryzhov
2016-10-28 18:40         ` Thomas Monjalon
2016-10-28 19:23           ` Igor Ryzhov
2016-10-28 23:09             ` Vincent Jardin
2016-10-28 16:25 ` Stephen Hemminger [this message]
2016-11-23 16:49   ` Aws Ismail

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