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Fri, 13 Oct 2017 14:01:12 +0000 (UTC) X-Original-To: lng-odp@lists.linaro.org Delivered-To: lng-odp@lists.linaro.org Received: by lists.linaro.org (Postfix, from userid 109) id 4C73460961; Fri, 13 Oct 2017 14:00:59 +0000 (UTC) Received: from forward100o.mail.yandex.net (forward100o.mail.yandex.net [37.140.190.180]) by lists.linaro.org (Postfix) with ESMTPS id CDEF160918 for ; Fri, 13 Oct 2017 14:00:56 +0000 (UTC) Received: from mxback6o.mail.yandex.net (mxback6o.mail.yandex.net [IPv6:2a02:6b8:0:1a2d::20]) by forward100o.mail.yandex.net (Yandex) with ESMTP id 0F0962A22F9D for ; Fri, 13 Oct 2017 17:00:55 +0300 (MSK) Received: from smtp4o.mail.yandex.net (smtp4o.mail.yandex.net [2a02:6b8:0:1a2d::28]) by mxback6o.mail.yandex.net (nwsmtp/Yandex) with ESMTP id EYCqMQ1gqm-0tuCVAVf; Fri, 13 Oct 2017 17:00:55 +0300 Received: by smtp4o.mail.yandex.net (nwsmtp/Yandex) with ESMTPSA id pgUFO1LS0d-0sGqb5db; Fri, 13 Oct 2017 17:00:54 +0300 (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (Client certificate not present) From: Github ODP bot To: lng-odp@lists.linaro.org Date: Fri, 13 Oct 2017 17:00:10 +0300 Message-Id: <1507903211-14959-3-git-send-email-odpbot@yandex.ru> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1507903211-14959-1-git-send-email-odpbot@yandex.ru> References: <1507903211-14959-1-git-send-email-odpbot@yandex.ru> Github-pr-num: 172 Subject: [lng-odp] [PATCH API-NEXT v11 2/3] api: classification: add random early detection and back pressure X-BeenThere: lng-odp@lists.linaro.org X-Mailman-Version: 2.1.16 Precedence: list List-Id: "The OpenDataPlane \(ODP\) List" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: lng-odp-bounces@lists.linaro.org Sender: "lng-odp" From: Balasubramanian Manoharan Adds random early detection and Back pressure feature to CoS Signed-off-by: Balasubramanian Manoharan --- /** Email created from pull request 172 (bala-manoharan:random_early_discard) ** https://github.com/Linaro/odp/pull/172 ** Patch: https://github.com/Linaro/odp/pull/172.patch ** Base sha: 60a1a4f1cc531d7f0117cd79daf1cbe4206e12ef ** Merge commit sha: 2474b4010dd04284d1bd9c312a3f4373d9ed5c5c **/ include/odp/api/spec/classification.h | 56 +++++++++++++++++++++++++++++++++++ 1 file changed, 56 insertions(+) diff --git a/include/odp/api/spec/classification.h b/include/odp/api/spec/classification.h index 0c4a95c5f..4e6842187 100644 --- a/include/odp/api/spec/classification.h +++ b/include/odp/api/spec/classification.h @@ -135,6 +135,13 @@ typedef struct odp_cls_capability_t { /** A Boolean to denote support of PMR range */ odp_bool_t pmr_range_supported; + + /** Support for Random Early Detection */ + odp_support_t random_early_detection; + + /** Support for Back Pressure to the remote peer */ + odp_support_t back_pressure; + } odp_cls_capability_t; /** @@ -206,6 +213,55 @@ typedef struct odp_cls_cos_param { /** Drop policy associated with CoS */ odp_cls_drop_t drop_policy; + + /** Random Early Detection (RED) + * Random Early Detection is enabled to initiate a drop probability + * for the incoming packet when the packets in the queue/pool reaches + * a specified threshold. + * When RED is enabled for a particular flow then further incoming + * packets are assigned a drop probability based on the size of the + * pool/queue and the drop probability becomes 100% when the queue/pool + * is full. + * RED is logically configured in the CoS and could be implemented + * in either pool or queue linked to the CoS depending on + * platform capabilities. + * RED is controlled using maximum and minimum threshold values + * which are defined as percentage of the system resource. + * RED is enabled when the resource limit is equal to or greater than + * the maximum threshold value and is disabled when resource limit + * is less than or equal to minimum threshold value. */ + + /** A boolean to enable RED + * When true, RED is enabled and configured with RED parameters. + * Otherwise, RED parameters are ignored. */ + odp_bool_t red_enable; + + /** RED parameters */ + struct { + /** Threshold percentage values for RED */ + + /** Maximum threshold percentage for RED */ + odp_percent_t max_threshold; + + /** Minimum threshold percentage for RED */ + odp_percent_t min_threshold; + } red; + + /** A boolean to enable Back pressure + * When true, back pressure is enabled and configured with the BP + * parameters. Otherwise BP parameters are ignored. When back pressure + * is enabled for a particular flow, the HW can send back pressure + * information to the remote peer indicating a network congestion */ + odp_bool_t bp_enable; + + /** BP parameters */ + struct { + /** Threshold percentage values for back pressure. + * BP is enabled when pool/queue size is equal to or greater + * than the backpressure threshold. BP threshold is expressed + * as a percentage of the pool/queue size. */ + odp_percent_t bp_threshold; + } bp; } odp_cls_cos_param_t; /**