From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751679AbdH2TF0 (ORCPT ); Tue, 29 Aug 2017 15:05:26 -0400 Received: from mail-ve1eur01on0075.outbound.protection.outlook.com ([104.47.1.75]:55262 "EHLO EUR01-VE1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751437AbdH2TFY (ORCPT ); Tue, 29 Aug 2017 15:05:24 -0400 Authentication-Results: spf=none (sender IP is ) smtp.mailfrom=arkadis@mellanox.com; Subject: Re: [PATCH net-next v2 00/10] net: dsa: add generic debugfs interface To: Andrew Lunn , Jiri Pirko References: <20170828191748.19492-1-vivien.didelot@savoirfairelinux.com> <20170828195332.GB1950@nanopsycho.orion> <20170828200834.GA1870@lunn.ch> <20170829062523.GA1977@nanopsycho.orion> <20170829125004.GB22093@lunn.ch> Cc: Vivien Didelot , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, kernel@savoirfairelinux.com, "David S. Miller" , Florian Fainelli , Egil Hjelmeland , John Crispin , Woojung Huh , Sean Wang , Nikita Yushchenko , Chris Healy , mlxsw@mellanox.com From: Arkadi Sharshevsky Message-ID: <8e6fa7ea-fb7b-3026-b9c0-417ef2efae27@mellanox.com> Date: Tue, 29 Aug 2017 22:05:11 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Thunderbird/45.8.0 MIME-Version: 1.0 In-Reply-To: <20170829125004.GB22093@lunn.ch> Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: 7bit X-Originating-IP: [2a02:ed0:5f62:af00:629b:ea78:4824:1145] X-ClientProxiedBy: AM5PR0701CA0012.eurprd07.prod.outlook.com (2603:10a6:203:51::22) To VI1PR0501MB2463.eurprd05.prod.outlook.com (2603:10a6:800:68::14) X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 7692d301-9149-42eb-85e9-08d4ef10e397 X-MS-Office365-Filtering-HT: Tenant X-Microsoft-Antispam: UriScan:;BCL:0;PCL:0;RULEID:(300000500095)(300135000095)(300000501095)(300135300095)(22001)(300000502095)(300135100095)(2017030254152)(300000503095)(300135400095)(48565401081)(201703131423075)(201703031133081)(201702281549075)(300000504095)(300135200095)(300000505095)(300135600095)(300000506095)(300135500095);SRVR:VI1PR0501MB2463; 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Why won't you use that to expose >>>> your hw state? >>> >>> We took a look at dpipe and i talked to you about using it for this >>> sort of thing at netconf/netdev. But dpipe has issues displaying the >>> sort of information we have. I never figured out how to do two >>> dimensional tables. The output of the dpipe command is pretty >>> unreadable. A lot of the information being dumped here is not about >>> the data pipe, etc. >> >> So improve it. No problem. Also, we extend it to support what you neede. > > Will i did try to do this back in March. And i failed. > > Lets start with stats. Vivien gives an example on the cover letter: > > # pr -mt switch0/port{5,6}/stats > in_good_octets : 0 in_good_octets : 13824 > in_bad_octets : 0 in_bad_octets : 0 > in_unicast : 0 in_unicast : 0 > in_broadcasts : 0 in_broadcasts : 216 > in_multicasts : 0 in_multicasts : 0 > in_pause : 0 in_pause : 0 > in_undersize : 0 in_undersize : 0 > > This is what i tried to implement using dpipe. It is a simple two > dimensional table. First column is a string, second a u64. In debugfs > we have such a table per port. That fits with the hierarchy that each > port is a directory in debugfs. But it could also be implemented as > one table with N+1 columns, for N switch ports. > Hi Andrew, This looks to me like basic L2 statistics that are obtained via ethtool, I remember you had this problem with the DSA and CPU port. Is this still the case? I remembered we wanted to use dpipe for the DSA routing table and IP priority table. I think both those processes really look like match/action table , thus they can be modeled successfully by dpipe. > How about you, or one of your team, implement that. It should be able > to use the dsa_loop driver, which is a simple dummy switch. But it > does have statistics counters for all ports. Florian or I can help you > get it running if needed. > > This branch contains some of the basic plumbing code from my previous > attempt: > > https://emea01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fgithub.com%2Flunn%2Flinux.git&data=02%7C01%7Carkadis%40mellanox.com%7Cb3cac139af204f79259c08d4eedc8410%7Ca652971c7d2e4d9ba6a4d149256f461b%7C0%7C0%7C636396078291326351&sdata=K5D3TAb2spckuF5k88oOaVt0dmtHj0AwE8bEEGPPdGI%3D&reserved=0 v4.11-rc4-net-next-dpipe > > Andrew >