From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753914AbaIDPky (ORCPT ); Thu, 4 Sep 2014 11:40:54 -0400 Received: from bombadil.infradead.org ([198.137.202.9]:54594 "EHLO bombadil.infradead.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751736AbaIDPkw (ORCPT ); Thu, 4 Sep 2014 11:40:52 -0400 Date: Thu, 4 Sep 2014 17:40:50 +0200 From: Peter Zijlstra To: Roman Gushchin Cc: mingo@redhat.com, Kirill Tkhai , LKML , Stanislav Fomichev Subject: Re: [RFC] smt-aware rt load balancer Message-ID: <20140904154050.GG346@worktop.programming.kicks-ass.net> References: <77161409833206@webcorp01h.yandex-team.ru> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <77161409833206@webcorp01h.yandex-team.ru> User-Agent: Mutt/1.5.22.1 (2013-10-16) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu, Sep 04, 2014 at 04:20:06PM +0400, Roman Gushchin wrote: > Hello! > > We had an earlier discussion about using real-time policies on modern CPUs > for cpu-bound tasks with "near real-time" execution time expectations (like front-end servers): > https://lkml.org/lkml/2014/4/24/602 . > > I sad, that I had a prototype of real-time load balancer (called smart), that performs well in this case. > > Now it's ready to be published. > > The patch set on top of the 3.10.x branch can be found here: > https://github.com/yandex/smart . > > It's stable. > We use them in production for a couple of months on more than thousand machines. > We get noticeable performance increase for many projects with different load patterns > (up to 10-15% in both RPS and latency). > > Any feedback, comments, questions are welcome! -ENOPATCH