From: Eliezer Tamir <eliezer.tamir@linux.intel.com>
To: David Miller <davem@davemloft.net>
Cc: eliezer.tamir@linux.jf.intel.com, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, jesse.brandeburg@intel.com,
e1000-devel@lists.sourceforge.net, willemb@google.com,
andi@firstfloor.org, hpa@zytor.com, eliezer@tamir.org.il
Subject: Re: [RFC PATCH 0/5] net: low latency Ethernet device polling
Date: Sat, 02 Mar 2013 19:02:31 +0200 [thread overview]
Message-ID: <513230A7.6050301@linux.intel.com> (raw)
In-Reply-To: <20130301.162400.1645765127882618751.davem@davemloft.net>
On 01/03/2013 23:24, David Miller wrote:
> From: Eliezer Tamir <eliezer.tamir@linux.jf.intel.com>
> Date: Wed, 27 Feb 2013 09:55:49 -0800
>
>> This patchset adds the ability for the socket layer code to poll directly
>> on an Ethernet device's RX queue. This eliminates the cost of the interrupt
>> and context switch and with proper tuning allows us to get very close
>> to the HW latency.
>>
>> This is a follow up to Jesse Brandeburg's Kernel Plumbers talk from last year
>> http://www.linuxplumbersconf.org/2012/wp-content/uploads/2012/09/2012-lpc-Low-Latency-Sockets-slides-brandeburg.pdf
>
> I just wanted to say that I like this work a lot.
>
> It proves a lot of things I try to impress upon people who talk about
> how RDMA is such a "must have" because the software stack can't
> possibly give anything near HW latency.
>
> Obviously such arguments are complete bullshit as is shown by these
> changes.
>
> This is exactly the kind of approach that makes sense rather than
> trying to put entire TCP stacks in the network card firmware.
>
> Thanks again for doing this work and I look forward to applying
> this stuff once all the kinks are worked out. The folks in the
> Intel NIC group continue to impress me.
It would really help us to hear opinions on the open issues we listed.
Thanks,
Eliezer
next prev parent reply other threads:[~2013-03-02 17:02 UTC|newest]
Thread overview: 42+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-02-27 17:55 [RFC PATCH 0/5] net: low latency Ethernet device polling Eliezer Tamir
2013-02-27 17:55 ` [RFC PATCH 1/5] net: implement support for low latency socket polling Eliezer Tamir
2013-03-03 18:35 ` Eric Dumazet
2013-03-03 19:21 ` Andi Kleen
2013-03-03 21:20 ` Eric Dumazet
2013-03-04 3:55 ` Andi Kleen
2013-03-04 8:43 ` Eliezer Tamir
2013-03-04 14:52 ` Eric Dumazet
2013-03-04 15:28 ` Eliezer Tamir
2013-03-04 16:15 ` Eric Dumazet
2013-03-04 7:23 ` Cong Wang
2013-03-05 16:43 ` Ben Hutchings
2013-03-05 17:15 ` Eliezer Tamir
2013-03-05 19:57 ` David Miller
2013-03-05 19:55 ` David Miller
2013-03-05 20:03 ` H. Peter Anvin
2013-02-27 17:56 ` [RFC PATCH 2/5] tcp: add TCP support for low latency receive poll Eliezer Tamir
2013-03-05 17:13 ` Ben Hutchings
2013-02-27 17:56 ` [RFC PATCH 3/5] ixgbe: Add support for ndo_ll_poll Eliezer Tamir
2013-02-27 18:41 ` Eric Dumazet
2013-02-27 19:20 ` Eliezer Tamir
2013-03-05 17:26 ` Ben Hutchings
2013-03-05 17:28 ` Ben Hutchings
2013-03-05 17:36 ` Eric Dumazet
2013-02-27 17:56 ` [RFC PATCH 4/5] ixgbe: add extra stats " Eliezer Tamir
2013-02-27 17:56 ` [RFC PATCH 5/5] ixgbe: kprobes latency test module Eliezer Tamir
2013-02-27 18:07 ` [RFC PATCH 0/5] net: low latency Ethernet device polling Eliezer Tamir
2013-02-27 18:13 ` Stephen Hemminger
2013-02-27 18:47 ` Tom Herbert
2013-02-27 19:17 ` Eliezer Tamir
2013-03-04 22:34 ` Ben Hutchings
2013-02-27 19:58 ` Rick Jones
2013-02-27 20:40 ` Eliezer Tamir
2013-02-27 21:42 ` Ben Greear
2013-02-28 8:38 ` Eliezer Tamir
2013-03-01 21:24 ` David Miller
2013-03-01 22:57 ` Tom Herbert
2013-03-02 17:02 ` Eliezer Tamir [this message]
2013-03-04 7:37 ` Cong Wang
2013-03-04 8:19 ` Eliezer Tamir
2013-03-04 8:46 ` Eliezer Tamir
2013-03-04 17:19 ` Stephen Hemminger
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