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Thu, 14 Sep 2017 08:00:47 +0000 (UTC) Received: from forward104j.mail.yandex.net (forward104j.mail.yandex.net [5.45.198.247]) by lists.linaro.org (Postfix) with ESMTPS id 61E6360C63 for ; Thu, 14 Sep 2017 08:00:16 +0000 (UTC) Received: from mxback5j.mail.yandex.net (mxback5j.mail.yandex.net [IPv6:2a02:6b8:0:1619::10e]) by forward104j.mail.yandex.net (Yandex) with ESMTP id BEC364561C for ; Thu, 14 Sep 2017 11:00:14 +0300 (MSK) Received: from smtp3p.mail.yandex.net (smtp3p.mail.yandex.net [2a02:6b8:0:1472:2741:0:8b6:8]) by mxback5j.mail.yandex.net (nwsmtp/Yandex) with ESMTP id whLjpseq78-0EJaaOOL; Thu, 14 Sep 2017 11:00:14 +0300 Received: by smtp3p.mail.yandex.net (nwsmtp/Yandex) with ESMTPSA id AptB5ucoDT-0Emu6pV9; Thu, 14 Sep 2017 11:00:14 +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: Thu, 14 Sep 2017 11:00:09 +0300 Message-Id: <1505376010-305-2-git-send-email-odpbot@yandex.ru> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1505376010-305-1-git-send-email-odpbot@yandex.ru> References: <1505376010-305-1-git-send-email-odpbot@yandex.ru> Github-pr-num: 172 Subject: [lng-odp] [PATCH API-NEXT v5 1/2] 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: 6b6253c30f88c80bf632436ff06c1b000860a2f1 ** Merge commit sha: 004b3f911c315f6d1e9e7fb1a057bd8fd86ee4c8 **/ include/odp/api/spec/classification.h | 44 +++++++++++++++++++++++++++++++++++ 1 file changed, 44 insertions(+) diff --git a/include/odp/api/spec/classification.h b/include/odp/api/spec/classification.h index 0c4a95c5..6e8cd951 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 +213,43 @@ 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 1 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 parameters */ + odp_bool_t red_enable; + + /* Maximum threshold percentage for RED */ + uint16_t max_red_threshold; + + /* Minimum threshold percentage for RED */ + uint16_t min_red_threshold; + + /* Back pressure + * 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; + + /* Threshold for enabling back pressure. BP is enabled when pool/queue + * size is equal to or greater than this backpressure threshold. + * BP threshold is expressed as a percentage of the resource size. */ + uint16_t bp_threshold; } odp_cls_cos_param_t; /**