Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S966308Ab3E2OkF (ORCPT ); Wed, 29 May 2013 10:40:05 -0400 Received: from mail-oa0-f48.google.com ([209.85.219.48]:47976 "EHLO mail-oa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S966162Ab3E2OkD (ORCPT ); Wed, 29 May 2013 10:40:03 -0400 MIME-Version: 1.0 In-Reply-To: References: <20130529063916.27486.3841.stgit@ladj378.jer.intel.com> <20130529063935.27486.18610.stgit@ladj378.jer.intel.com> Date: Wed, 29 May 2013 17:40:02 +0300 Message-ID: Subject: Re: [PATCH v6 net-next 2/5] net: implement support for low latency socket polling From: yaniv saar To: linux-kernel@vger.kernel.org, netdev@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1560 Lines: 36 Hi Eliezer, (If I'm too late then a future note...) Why make polling a system-wide configuration? Wouldn't it make more sense to implement a sock option? An even better solution might be aggregation/combination of both types of configurations. -- Yaniv Sa'ar On Wed, May 29, 2013 at 5:14 PM, Or Gerlitz wrote: > On Wed, May 29, 2013 at 9:39 AM, Eliezer Tamir > wrote: >> Adds a new ndo_ll_poll method and the code that supports and uses it. >> This method can be used by low latency applications to busy poll Ethernet >> device queues directly from the socket code. The value of sysctl_net_ll_poll >> controls how many microseconds to poll. Set to zero to disable. > > Unlike with TCP sockets, UDP sockets may receive packets from multiple > sources and hence the receiving context may be steered to be executed > on different cores through RSS or other Flow-Steering HW mechanisms > which could mean different napi contexts for the same socket, is that > a problem here? what's the severity? > > Or. > -- > To unsubscribe from this list: send the line "unsubscribe linux-kernel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > Please read the FAQ at http://www.tux.org/lkml/ -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/