From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rick Jones Subject: Re: [PATCH] net: add Documentation/networking/scaling.txt Date: Fri, 19 Aug 2011 10:38:17 -0700 Message-ID: <4E4E9F89.6010903@hp.com> References: <4E36F524.7090301@hp.com> <1313524404.2725.50.camel@bwh-desktop> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Tom Herbert , rdunlap@xenotime.net, linux-doc@vger.kernel.org, davem@davemloft.net, netdev@vger.kernel.org, willemb@google.com To: Ben Hutchings Return-path: In-Reply-To: <1313524404.2725.50.camel@bwh-desktop> Sender: linux-doc-owner@vger.kernel.org List-Id: netdev.vger.kernel.org On 08/16/2011 12:53 PM, Ben Hutchings wrote: > On Mon, 2011-08-01 at 11:49 -0700, Rick Jones wrote: >> On 07/31/2011 11:56 PM, Tom Herbert wrote: >>> Describes RSS, RPS, RFS, accelerated RFS, and XPS. >>> >>> Signed-off-by: Tom Herbert >>> --- >>> Documentation/networking/scaling.txt | 346 ++++++++++++++++++++++++++++++++++ >>> 1 files changed, 346 insertions(+), 0 deletions(-) >>> create mode 100644 Documentation/networking/scaling.txt >>> >>> diff --git a/Documentation/networking/scaling.txt b/Documentation/networking/scaling.txt >>> new file mode 100644 >>> index 0000000..aa51f0f >>> --- /dev/null >>> +++ b/Documentation/networking/scaling.txt >>> @@ -0,0 +1,346 @@ >>> +Scaling in the Linux Networking Stack >>> + >>> + >>> +Introduction >>> +============ >>> + >>> +This document describes a set of complementary techniques in the Linux >>> +networking stack to increase parallelism and improve performance (in >>> +throughput, latency, CPU utilization, etc.) for multi-processor systems. >> >> Why not just leave-out the parenthetical lest some picky pedant find a >> specific example where either of those three are not improved? > > As I'm sure you're aware, there is often a trade-off between throughput > and latency. It might be useful to provide some guidelines for > optimising each of the above. Yes. I just worry about taking *too* many steps down the slippery slope and ending-up ballooning into a broad systems tuning tutorial. rick