From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: <dev-bounces@dpdk.org> Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 343C9A0350; Sun, 28 Jun 2020 10:14:47 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id C6AC91C1B2; Sun, 28 Jun 2020 10:14:45 +0200 (CEST) Received: from dispatch1-us1.ppe-hosted.com (dispatch1-us1.ppe-hosted.com [67.231.154.164]) by dpdk.org (Postfix) with ESMTP id EF9F61C1B1 for <dev@dpdk.org>; Sun, 28 Jun 2020 10:14:44 +0200 (CEST) Received: from mx1-us1.ppe-hosted.com (unknown [10.110.50.143]) by dispatch1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTP id 784AE20052; Sun, 28 Jun 2020 08:14:44 +0000 (UTC) Received: from us4-mdac16-73.at1.mdlocal (unknown [10.110.50.191]) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTP id 761398009B; Sun, 28 Jun 2020 08:14:44 +0000 (UTC) X-Virus-Scanned: Proofpoint Essentials engine Received: from mx1-us1.ppe-hosted.com (unknown [10.110.49.33]) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTPS id 0347440058; Sun, 28 Jun 2020 08:14:44 +0000 (UTC) Received: from webmail.solarflare.com (uk.solarflare.com [193.34.186.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA384 (256/256 bits)) (No client certificate requested) by mx1-us1.ppe-hosted.com (PPE Hosted ESMTP Server) with ESMTPS id 560F9340058; Sun, 28 Jun 2020 08:14:43 +0000 (UTC) Received: from [192.168.38.17] (10.17.10.39) by ukex01.SolarFlarecom.com (10.17.10.4) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Sun, 28 Jun 2020 09:14:35 +0100 To: Jerin Jacob <jerinjacobk@gmail.com>, Thomas Monjalon <thomas@monjalon.net> CC: Jiawei Wang <jiaweiw@mellanox.com>, Ori Kam <orika@mellanox.com>, "Slava Ovsiienko" <viacheslavo@mellanox.com>, Matan Azrad <matan@mellanox.com>, dpdk-dev <dev@dpdk.org>, Raslan Darawsheh <rasland@mellanox.com>, <ian.stokes@intel.com>, <fbl@redhat.com>, Ferruh Yigit <ferruh.yigit@intel.com> References: <1593102379-400132-1-git-send-email-jiaweiw@mellanox.com> <17660414.AQMWyGVKyv@thomas> <CALBAE1MDBTuDdX0-YKSH=zzOyDh=zxt-ZqhCQLc=q-7xwt8PFg@mail.gmail.com> <7719744.nB5e5IOROX@thomas> <CALBAE1M0iygEsaDqAp+p4ajN1-mn22z8UxhvBxWmg+p4ebdXTw@mail.gmail.com> From: Andrew Rybchenko <arybchenko@solarflare.com> Autocrypt: addr=arybchenko@solarflare.com; keydata= mQINBF2681gBEACbdTxu8eLL3UX2oAelsnK9GkeaJeUYSOHPJQpV7RL/iaIskqTwBRnhjXt7 j9UEwGA+omnOmqQMpeQTb/F9Ma2dYE+Hw4/t/1KVjxr3ehFaASvwR4fWJfO4e2l/Rk4rG6Yi 5r6CWU2y8su2654Fr8KFc+cMGOAgKoZTZHZsRy5lHpMlemeF+VZkv8L5sYJWPnsypgqlCG3h v6lbtfZs+QqYbFH6bqoZwBAl5irmxywGR7ZJr1GLUZZ1lfdazSY8r6Vz0/Ip/KVxGu2uxo81 QCsAj0ZsQtwji9Sds/prTiPrIjx8Fc/tfbnAuVuPcnPbczwCJACzQr4q26XATL3kVuZhSBWh 4XfO/EAUuEq5AemUG5DDTM87g7Lp4eT9gMZB6P+rJwWPNWTiV3L7Cn+fO+l9mTPnOqdzBgDe OaulKiNSft1o0DY4bGzOmM2ad2cZt0jfnbMPMTE9zsr6+RFa+M8Ct20o6U1MUE4vP6veErMK of4kZ8PdoMM+Sq1hxMPNtlcVBSP9xMmdSZPlfDYI5VWosOceEcz7XZdjBJKdwKuz70V7eac4 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<789106eb-a752-8d96-b0db-02194c843b57@solarflare.com> Date: Sun, 28 Jun 2020 11:14:30 +0300 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.9.0 MIME-Version: 1.0 In-Reply-To: <CALBAE1M0iygEsaDqAp+p4ajN1-mn22z8UxhvBxWmg+p4ebdXTw@mail.gmail.com> Content-Type: text/plain; charset="utf-8" Content-Language: en-US Content-Transfer-Encoding: 7bit X-Originating-IP: [10.17.10.39] X-ClientProxiedBy: ocex03.SolarFlarecom.com (10.20.40.36) To ukex01.SolarFlarecom.com (10.17.10.4) X-TM-AS-Product-Ver: SMEX-12.5.0.1300-8.5.1020-25508.000 X-TM-AS-Result: No-11.921400-8.000000-10 X-TMASE-MatchedRID: TmlY9+XBoTnmLzc6AOD8DfHkpkyUphL9LgJt/p5N7ykd0WOKRkwsh2vN CpJfjLBYa41ZsDe8QxNSIMSIHgNbdL8q1zjO7UWhIAjxomarSPAO9z+P2gwiBX5Isu006IGGycx J39X6GCIYn1NtehrbSnvI2DCFJu+jfm3AuPH7Y6BswYo64ufkVffjx7YIT/BiFoX0IByf8R4jJx wpT9SCmyo3q7ohY+pLU9xoV5qWgLcJOnewXha7H1BSWz5Zgb/Dj87/LK+2sqObaRDnIHtHqNyVr IZi/5O/84FFP5rFoJ5U7R2tXUtB8yKPWteEVkEMet6HZsHsM79bnEbdz0P1q99zZd3pUn7K8ij/ 9IS88qQZSbex5qpHkylVI3bZAw2mG9+YWBtn9f39xyC38S1f/aj/4E8uid3+saBpKVcMnY2bYS/ jZ6L0fa+hEqfljdmd5BaQuGxsXn8evt/ebtDuDcVbb3pjW5Mn3V4UShoTXaci0/kre3GpursjFJ j2Pyy43kbpr5fKx5+Rk6XtYogiau9c69BWUTGwVnRXm1iHN1bEQdG7H66TyH4gKq42LRYksbKL1 tuAhvi3eVbHm4EisAZdDAnWzxNj1LTX32bZIxp+3BndfXUhXQ== X-TM-AS-User-Approved-Sender: Yes X-TM-AS-User-Blocked-Sender: No X-TMASE-Result: 10--11.921400-8.000000 X-TMASE-Version: SMEX-12.5.0.1300-8.5.1020-25508.000 X-MDID: 1593332084-JUxx61YBEvBA Subject: Re: [dpdk-dev] [PATCH 1/8] ethdev: introduce sample action for rte flow X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions <dev.dpdk.org> List-Unsubscribe: <https://mails.dpdk.org/options/dev>, <mailto:dev-request@dpdk.org?subject=unsubscribe> List-Archive: <http://mails.dpdk.org/archives/dev/> List-Post: <mailto:dev@dpdk.org> List-Help: <mailto:dev-request@dpdk.org?subject=help> List-Subscribe: <https://mails.dpdk.org/listinfo/dev>, <mailto:dev-request@dpdk.org?subject=subscribe> Errors-To: dev-bounces@dpdk.org Sender: "dev" <dev-bounces@dpdk.org> On 6/26/20 2:10 PM, Jerin Jacob wrote: > On Fri, Jun 26, 2020 at 4:16 PM Thomas Monjalon <thomas@monjalon.net> wrote: >> >> 26/06/2020 12:35, Jerin Jacob: >>> On Fri, Jun 26, 2020 at 12:59 AM Thomas Monjalon <thomas@monjalon.net> wrote: >>>> >>>> 25/06/2020 19:55, Jerin Jacob: >>>>> On Thu, Jun 25, 2020 at 10:20 PM Jiawei Wang <jiaweiw@mellanox.com> wrote: >>>>>> >>>>>> When using full offload, all traffic will be handled by the HW, and >>>>>> directed to the requested vf or wire, the control application loses >>>>>> visibility on the traffic. >>>>>> So there's a need for an action that will enable the control application >>>>>> some visibility. >>>>>> >>>>>> The solution is introduced a new action that will sample the incoming >>>>>> traffic and send a duplicated traffic in some predefined ratio to the >>>>>> application, while the original packet will continue to the target >>>>>> destination. >>>>>> >>>>>> The packets sampled equals is '1/ratio', if the ratio value be set to 1 >>>>>> , means that the packets would be completely mirrored. The sample packet >>>>>> can be assigned with different set of actions from the original packet. >>>>>> >>>>>> In order to support the sample packet in rte_flow, new rte_flow action >>>>>> definition RTE_FLOW_ACTION_TYPE_SAMPLE and structure rte_flow_action_sample >>>>> >>>>> Isn't mirroring the packet? How about, RTE_FLOW_ACTION_TYPE_MIRROR >>>>> I am not able to understand, Why it is called sample. >>>> >>>> Sampling is a partial mirroring. >>> >>> I think, By definition, _sampling_ is the _selection_ of items from a >>> specific group. >>> I think, _sampling_ is not dictating, what is the real action for the >>> "selected" items. >>> One can get confused with the selected ones can be for forward, drop >>> any other action. >> >> I see. Good design question (I will let others reply). >> >>> So IMO, explicit mirror keyword usage makes it is clear. >>> >>> Some more related questions: >>> 1) What is the real use case for ratio? I am not against adding a >>> ratio attribute if the MLX hardware supports it. It will be good to >>> know the use case from the application perspective? And what basics >>> application set ratio != 1? >> >> If I understand well, some applications want to check, >> by picking random packets, that the processing is not failing. > > Not clear to me. I will wait for another explanation if any. > In what basics application set .1 vs .8? > >> >>> 2) If it is for "rate-limiting" or "policing", why not use rte_mtr >>> object (rte_mtr.h) via rte_flow action. >>> 3) One of the issue for driver developers and application writers are >>> overlapping APIs. This would overlap with rte_eth_mirror_rule_set() >>> API. >>> >>> Can we deprecate rte_eth_mirror_rule_set() API? It will be a pain for >>> all to have overlapping APIs. We have not fixed the VLAN filter API >>> overlap with rte_flow in ethdev. Its being TODO for multiple releases >>> now. >> >> Ooooooooh yes! >> I think flow-based API is more powerful, and should deprecate >> old port-based API. > > +1 from me. +1 > it is taking too much effort and time to make support duplicate APIs. > >> I want to help deprecating such API in 20.11 if possible. > > Please start that discussion. In this case, it is clear API overlap > with rte_eth_mirror_rule_set(). > We should not have two separate paths for the same function in the > same ethdev library. > > > >> >>>> Full mirroring is sampling 100% packets (ratio = 1). >>>> That's why only one action is enough. >> >> >>