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Mon, 22 Jul 2024 12:21:33 +0000 Message-ID: <57e6bded-8d10-4db8-ad2e-11dfd126205f@arm.com> Date: Mon, 22 Jul 2024 13:21:31 +0100 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v3 3/5] firmware: arm_scmi: Track basic SCMI statistics Content-Language: en-GB To: Peng Fan , "linux-kernel@vger.kernel.org" , "linux-arm-kernel@lists.infradead.org" , "arm-scmi@vger.kernel.org" Cc: "sudeep.holla@arm.com" , "cristian.marussi@arm.com" References: <20240715133751.2877197-1-luke.parkin@arm.com> <20240715133751.2877197-4-luke.parkin@arm.com> From: Luke Parkin In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-ClientProxiedBy: LO4P123CA0548.GBRP123.PROD.OUTLOOK.COM (2603:10a6:600:319::11) To DU0PR08MB8639.eurprd08.prod.outlook.com (2603:10a6:10:401::11) MIME-Version: 1.0 X-MS-TrafficTypeDiagnostic: DU0PR08MB8639:EE_|PA4PR08MB6176:EE_|DU2PEPF00028CFE:EE_|AS2PR08MB9450:EE_ X-MS-Office365-Filtering-Correlation-Id: 36c04eff-dee9-4776-60ab-08dcaa48d8c7 x-checkrecipientrouted: true NoDisclaimer: true X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam-Untrusted: BCL:0;ARA:13230040|366016|1800799024|376014; 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X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org > Just wonder that since ftrace is there, why need this? Hi, this series aims to provide a useful debug aid for running tests on the SCMI subsystem. As you mentioned, ftrace does report some of these statistics, however DEBUG_STATISTICS will allow a programatic interface to access the count of failures, successes and an extended variety of other specific errors/statistics for automated (or manual) testing. Hope this clears things up, Luke