From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from dpdk.org (dpdk.org [92.243.14.124]) by inbox.dpdk.org (Postfix) with ESMTP id 20C31A04DB; Thu, 15 Oct 2020 10:28:43 +0200 (CEST) Received: from [92.243.14.124] (localhost [127.0.0.1]) by dpdk.org (Postfix) with ESMTP id E2C761DD30; Thu, 15 Oct 2020 10:28:41 +0200 (CEST) Received: from wout4-smtp.messagingengine.com (wout4-smtp.messagingengine.com [64.147.123.20]) by dpdk.org (Postfix) with ESMTP id 32D711DD2D for ; Thu, 15 Oct 2020 10:28:40 +0200 (CEST) Received: from compute2.internal (compute2.nyi.internal [10.202.2.42]) by mailout.west.internal (Postfix) with ESMTP id 1F4A9FBA; Thu, 15 Oct 2020 04:28:38 -0400 (EDT) Received: from mailfrontend2 ([10.202.2.163]) by compute2.internal (MEProxy); Thu, 15 Oct 2020 04:28:38 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=monjalon.net; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding:content-type; s=fm2; bh= gvPtgvz0xDwi3nhULXtSCnAOTK0hfg4qWfnwJKfTY/4=; b=WmDMp15mwa74LsPg X74zfDuqPYVAoq/+GVuW2ek9/8z/urUmJS3EJI8ijADvFbxxP+pKvarDmMVRT1P/ g7+FkeJoXPiQAkCPtptYtrHkTOgdHSdVP/iDk5sAV2TXyXr2L5kg/yxHwSCqqEo1 EgkCLdSL93FYEQn+PmbdaNrAzJrAXqC8gbwvepS8zZbPiFvXEW8KTUcQN0IB45me IaAjSAoJ5Lop+qvNhNyhpUhFdRv11+VR2EON0A3azBV5C7/jlnC6WHptudTAej5k tmRYnU1WBeKiK89FdQWbrso5Oo6d+JDjcgCyS+pOq/vN7NXz0kKa4jw028HOGx5F Bd9Ylw== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:content-type :date:from:in-reply-to:message-id:mime-version:references :subject:to:x-me-proxy:x-me-proxy:x-me-sender:x-me-sender :x-sasl-enc; s=fm1; bh=gvPtgvz0xDwi3nhULXtSCnAOTK0hfg4qWfnwJKfTY /4=; b=lDW94PIaL4YmMmbaj8I0FEG0rv7kE+9OK172MKl1xV4XqAMLKYBlVWqXP ZHa5zCNDxP39Ktt7ixEq33w8ZpQ3Ov23QdBMwpT6H6MxR7vA+rihUro1r2eaNBQ8 Ky9nltpUm1b9lcjtl6KlalG+WhzfK7KRHIRak2ogJKWS+espnijMHKnITET+rVFX rOx47IdjMmMO3mr39PYAmrevZ5TUR6f4NSOQZvICo54r31W5++vovbNBb+4uPL7R SlD735wyLRi49fQSCZJAmDTFkQc2gvZKCvRPKaJvIh1cchGhhDpkTI58JUb5PjK3 nj3LM1NuY1aFLKpNkEJTt8q/DaZdA== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedujedrieefgddtgecutefuodetggdotefrodftvf curfhrohhfihhlvgemucfhrghsthforghilhdpqfgfvfdpuffrtefokffrpgfnqfghnecu uegrihhlohhuthemuceftddtnecusecvtfgvtghiphhivghnthhsucdlqddutddtmdenuc fjughrpefhvffufffkjghfggfgtgesthfuredttddtvdenucfhrhhomhepvfhhohhmrghs ucfoohhnjhgrlhhonhcuoehthhhomhgrshesmhhonhhjrghlohhnrdhnvghtqeenucggtf frrghtthgvrhhnpedugefgvdefudfftdefgeelgffhueekgfffhfeujedtteeutdejueei iedvffegheenucfkphepjeejrddufeegrddvtdefrddukeegnecuvehluhhsthgvrhfuih iivgeptdenucfrrghrrghmpehmrghilhhfrhhomhepthhhohhmrghssehmohhnjhgrlhho nhdrnhgvth X-ME-Proxy: Received: from xps.localnet (184.203.134.77.rev.sfr.net [77.134.203.184]) by mail.messagingengine.com (Postfix) with ESMTPA id 5CE993064674; Thu, 15 Oct 2020 04:28:36 -0400 (EDT) From: Thomas Monjalon To: Suanming Mou Cc: Ori Kam , Ferruh Yigit , Andrew Rybchenko , dev@dpdk.org Date: Thu, 15 Oct 2020 10:28:35 +0200 Message-ID: <2847989.Y1bzbvb2tm@thomas> In-Reply-To: <1602724067-390536-3-git-send-email-suanmingm@nvidia.com> References: <1601194817-208834-1-git-send-email-suanmingm@nvidia.com> <1602724067-390536-1-git-send-email-suanmingm@nvidia.com> <1602724067-390536-3-git-send-email-suanmingm@nvidia.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7Bit Content-Type: text/plain; charset="us-ascii" Subject: Re: [dpdk-dev] [PATCH v5 2/2] ethdev: make rte_flow API thread safe X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" 15/10/2020 03:07, Suanming Mou: > Currently, the rte_flow functions are not defined as thread safe. > DPDK applications either call the functions in single thread or > protect any concurrent calling for the rte_flow operations using > a lock. > > For PMDs support the flow operations thread safe natively, the > redundant protection in application hurts the performance of the > rte_flow operation functions. > > And the restriction of thread safe is not guaranteed for the > rte_flow functions also limits the applications' expectation. > > This feature is going to change the rte_flow functions to be thread > safe. As different PMDs have different flow operations, some may > support thread safe already and others may not. For PMDs don't > support flow thread safe operation, a new lock is defined in ethdev > in order to protects thread unsafe PMDs from rte_flow level. > > A new RTE_ETH_DEV_FLOW_OPS_THREAD_SAFE device flag is added to > determine whether the PMD supports thread safe flow operation or not. > For PMDs support thread safe flow operations, set the > RTE_ETH_DEV_FLOW_OPS_THREAD_SAFE flag, rte_flow level functions will > skip the thread safe helper lock for these PMDs. Again the rte_flow > level thread safe lock only works when PMD operation functions are > not thread safe. > > For the PMDs which don't want the default mutex lock, just set the > flag in the PMD, and add the prefer type of lock in the PMD. Then > the default mutex lock is easily replaced by the PMD level lock. > > The change has no effect on the current DPDK applications. No change > is required for the current DPDK applications. For the standard posix > pthread_mutex, if no lock contention with the added rte_flow level > mutex, the mutex only does the atomic increasing in > pthread_mutex_lock() and decreasing in > pthread_mutex_unlock(). No futex() syscall will be involved. > > Signed-off-by: Suanming Mou > Acked-by: Ajit Khaparde > Acked-by: Ori Kam > Acked-by: Matan Azrad Acked-by: Thomas Monjalon