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Wed, 19 Jul 2023 01:55:49 -0500 From: Sandipan Das To: , , CC: , , , , , , , , , , , , , , , , , Subject: [PATCH 0/6] perf/x86/amd: Add memory controller events Date: Wed, 19 Jul 2023 12:25:35 +0530 Message-ID: X-Mailer: git-send-email 2.34.1 MIME-Version: 1.0 X-Originating-IP: [10.180.168.240] X-ClientProxiedBy: SATLEXMB03.amd.com (10.181.40.144) To SATLEXMB04.amd.com (10.181.40.145) X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: BN8NAM11FT083:EE_|BY5PR12MB4035:EE_ X-MS-Office365-Filtering-Correlation-Id: c3378ad7-bdeb-4a25-68f6-08db8825330e 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)(376002)(39860400002)(136003)(346002)(396003)(82310400008)(451199021)(46966006)(40470700004)(36840700001)(7416002)(86362001)(36756003)(2906002)(44832011)(40460700003)(40480700001)(2616005)(16526019)(186003)(36860700001)(83380400001)(336012)(426003)(47076005)(26005)(82740400003)(81166007)(110136005)(356005)(70206006)(6666004)(54906003)(70586007)(478600001)(316002)(5660300002)(4326008)(41300700001)(8936002)(8676002)(36900700001);DIR:OUT;SFP:1101; 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Currently, Zen 4 supports upto 12 channels of DDR5 memory and each of them are controlled by a dedicated UMC. Each UMC, in turn, has its own set of performance monitoring counters. These counters can provide info on UMC command activity which in turn can be used to derive utilization and bandwidth. Using perf tool, users can profile activity either on a combined basis (includes all active UMCs) or for individual UMCs. E.g. measurement across all UMCs $ sudo perf stat -e amd_umc/umc_cas_cmd.all/ -a -- sleep 1 Performance counter stats for 'system wide': 544,810 amd_umc/umc_cas_cmd.all/ 1.002012663 seconds time elapsed E.g. measurement specific to certain UMCs $ sudo perf stat -e amd_umc_0/umc_cas_cmd.all/ -e amd_umc_6/umc_cas_cmd.all/ -a -- sleep 1 Performance counter stats for 'system wide': 21,096 amd_umc_0/umc_cas_cmd.all/ 35,428 amd_umc_6/umc_cas_cmd.all/ 1.001802611 seconds time elapsed The available UMCs can be found from sysfs and the socket to which they belong can be derived from the cpumask. E.g. $ find /sys/devices/ -maxdepth 1 -name "amd_umc_*" /sys/devices/amd_umc_9 /sys/devices/amd_umc_7 /sys/devices/amd_umc_5 /sys/devices/amd_umc_3 /sys/devices/amd_umc_1 /sys/devices/amd_umc_10 /sys/devices/amd_umc_8 /sys/devices/amd_umc_6 /sys/devices/amd_umc_4 /sys/devices/amd_umc_2 /sys/devices/amd_umc_11 /sys/devices/amd_umc_0 $ cat /sys/devices/amd_umc_0/cpumask 0 $ cat /sys/devices/amd_umc_6/cpumask 96 All of the output above comes from a dual socket Genoa system having 96 cores and 6 populated memory channels per socket. Sandipan Das (6): perf/x86/amd/uncore: Refactor uncore management perf/x86/amd/uncore: Use rdmsr if rdpmc is unavailable x86/cpuid: Add smp helper perf/x86/amd/uncore: Add group exclusivity perf/x86/amd/uncore: Add memory controller support perf vendor events amd: Add Zen 4 memory controller events arch/x86/events/amd/uncore.c | 893 +++++++++++------- arch/x86/include/asm/cpuid.h | 14 + arch/x86/include/asm/msr-index.h | 4 + arch/x86/include/asm/perf_event.h | 9 + arch/x86/lib/Makefile | 2 +- arch/x86/lib/cpuid-smp.c | 36 + .../arch/x86/amdzen4/memory-controller.json | 101 ++ .../arch/x86/amdzen4/recommended.json | 84 ++ tools/perf/pmu-events/jevents.py | 2 + 9 files changed, 807 insertions(+), 338 deletions(-) create mode 100644 arch/x86/lib/cpuid-smp.c create mode 100644 tools/perf/pmu-events/arch/x86/amdzen4/memory-controller.json