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Mon, 23 Sep 2019 09:36:53 +0000 Received: from VE1PR08MB4640.eurprd08.prod.outlook.com ([fe80::2d67:163d:b192:4b9]) by VE1PR08MB4640.eurprd08.prod.outlook.com ([fe80::2d67:163d:b192:4b9%7]) with mapi id 15.20.2284.023; Mon, 23 Sep 2019 09:36:48 +0000 From: "Phil Yang (Arm Technology China)" To: "konstantin.ananyev@intel.com" , "wenzhuo.lu@intel.com" CC: "Ruifeng Wang (Arm Technology China)" , "Gavin Hu (Arm Technology China)" , Honnappa Nagarahalli , "Song Zhu (Arm Technology China)" , "dev@dpdk.org" , nd , nd Thread-Topic: Why DCA got removed in ixgbe PMD? 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Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1PR0802MB2475 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable X-Content-Filtered-By: Mailman/MimeDel 2.1.15 Subject: [dpdk-dev] Why DCA got removed in ixgbe PMD? 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" Hi, Konstantin & WenZhuo The ixgbe kernel driver supports DCA (Direct Cache Access) mode to improve = IO performance on IA. [ixgbe: Add optional DCA infrastructure] DPDK ixgbe PMD contains some DCA flags in the header files but has no imple= mentation on this mechanism. https://git.dpdk.org/dpdk/tree/drivers/net/ixgbe/base/ixgbe_type.h [at li= ne 1470] So why DCA feature got removed in ixgbe PMD? Is it replaced by any other L2 cache warm technology on x86 DPDK? Thanks in advance. Best Regards, Phil Yang