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Tue, 13 Jun 2023 04:55:59 -0500 From: Ravi Bangoria To: CC: , , , , , , , , , , , , , , , , Subject: [PATCH 1/4] perf pmus: Describe semantics of 'core_pmus' and 'other_pmus' Date: Tue, 13 Jun 2023 15:25:03 +0530 Message-ID: <20230613095506.547-2-ravi.bangoria@amd.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20230613095506.547-1-ravi.bangoria@amd.com> References: <20230613095506.547-1-ravi.bangoria@amd.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB04.amd.com (10.181.40.145) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SN1PEPF0002636C:EE_|SN7PR12MB7153:EE_ X-MS-Office365-Filtering-Correlation-Id: f7bbad3a-4b32-4eed-c16a-08db6bf46719 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:165.204.84.17;CTRY:US;LANG:en;SCL:1;SRV:;IPV:CAL;SFV:NSPM;H:SATLEXMB04.amd.com;PTR:InfoDomainNonexistent;CAT:NONE;SFS:(13230028)(4636009)(39860400002)(136003)(396003)(376002)(346002)(451199021)(40470700004)(46966006)(36840700001)(47076005)(36860700001)(356005)(86362001)(40480700001)(82310400005)(81166007)(40460700003)(478600001)(82740400003)(41300700001)(54906003)(6666004)(5660300002)(7696005)(8676002)(44832011)(16526019)(70586007)(4326008)(2906002)(6916009)(8936002)(7416002)(316002)(70206006)(2616005)(26005)(1076003)(336012)(426003)(36756003)(186003)(36900700001);DIR:OUT;SFP:1101; X-OriginatorOrg: amd.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 13 Jun 2023 09:56:04.8209 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f7bbad3a-4b32-4eed-c16a-08db6bf46719 X-MS-Exchange-CrossTenant-Id: 3dd8961f-e488-4e60-8e11-a82d994e183d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=3dd8961f-e488-4e60-8e11-a82d994e183d;Ip=[165.204.84.17];Helo=[SATLEXMB04.amd.com] X-MS-Exchange-CrossTenant-AuthSource: SN1PEPF0002636C.namprd02.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: SN7PR12MB7153 X-Spam-Status: No, score=-1.1 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,DKIM_VALID_EF,FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE,RCVD_IN_MSPIKE_H2,SPF_HELO_PASS,SPF_NONE, T_SCC_BODY_TEXT_LINE,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 'core_pmus' and 'other_pmus' are independent of hw core pmu and uncore pmus. For example, AMD IBS PMUs are present in each SMT-thread but they belongs to 'other_pmus'. Add a comment describing what these list contains and how they are treated. Signed-off-by: Ravi Bangoria --- tools/perf/util/pmus.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/tools/perf/util/pmus.c b/tools/perf/util/pmus.c index e1d0a93147e5..e505d2fef828 100644 --- a/tools/perf/util/pmus.c +++ b/tools/perf/util/pmus.c @@ -12,6 +12,19 @@ #include "pmu.h" #include "print-events.h" +/* + * core_pmus: A PMU belongs to core_pmus if it's name is "cpu" or it's sysfs + * directory contains "cpus" file. All PMUs belonging to core_pmus + * must have pmu->is_core=1. If there are more than one PMUs in + * this list, perf interprets it as a heterogeneous platform. + * (FWIW, certain ARM platforms having heterogeneous cores uses + * homogeneous PMU in which case it will be treated as homogeneous + * platform by perf because core_pmus will have only one entry.) + * other_pmus: All other PMUs which are not part of core_pmus list. Does not + * matter whether it is a per SMT-thread or outside of the core in + * hw. i.e. PMUs belonging to other_pmus must have pmu->is_core=0 + * but pmu->is_uncore could be 0 or 1. + */ static LIST_HEAD(core_pmus); static LIST_HEAD(other_pmus); static bool read_sysfs_core_pmus; -- 2.40.1