From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from foss.arm.com (foss.arm.com [217.140.101.70]) by dpdk.org (Postfix) with ESMTP id 8DFBE2C2F for ; Wed, 31 Oct 2018 04:36:25 +0100 (CET) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 9C277341; Tue, 30 Oct 2018 20:36:24 -0700 (PDT) Received: from net-arm-thunderx2.shanghai.arm.com (net-arm-thunderx2.shanghai.arm.com [10.169.40.70]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 12AA33F557; Tue, 30 Oct 2018 20:36:22 -0700 (PDT) From: Gavin Hu To: dev@dpdk.org Cc: thomas@monjalon.net, olivier.matz@6wind.com, chaozhu@linux.vnet.ibm.com, bruce.richardson@intel.com, konstantin.ananyev@intel.com, jerin.jacob@caviumnetworks.com, Honnappa.Nagarahalli@arm.com, gavin.hu@arm.com Date: Wed, 31 Oct 2018 11:35:43 +0800 Message-Id: <1540956945-211373-1-git-send-email-gavin.hu@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1539757786-226178-1-git-send-email-gavin.hu@arm.com> References: <1539757786-226178-1-git-send-email-gavin.hu@arm.com> Subject: [dpdk-dev] [PATCH v2 0/2] rte ring c11 bug fix and optimization 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: , X-List-Received-Date: Wed, 31 Oct 2018 03:36:25 -0000 v1->v2 1) Add the changes to the 18.11 release notes V1: Updated the rte ring C11 driver including the following changes 1) Synchronize the load and store of the tail to ensure the enqueue/dequeue operations are really completed before seen by the observers on the other sides. 2) Move the atomic load of head above the loop for the first iteration,it is not unnecessary and degrade performance for the other iteration as the head was loaded in the failure case of CAS. Gavin Hu (2): ring: synchronize the load and store of the tail ring: move the atomic load of head above the loop doc/guides/rel_notes/release_18_11.rst | 7 +++++++ lib/librte_ring/rte_ring_c11_mem.h | 24 +++++++++++++++++------- 2 files changed, 24 insertions(+), 7 deletions(-) -- 2.7.4