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b=DMA2c9RVRtsb/cpK2+UKYxev9vPtlWtjoYi+5hSb0Uei6jXIwH9pdYaOIUDzPKSL8VialzgGjzVzxpYi47ur75t/wlCfw3FP9Zo59boZCiaP7StqCUz/hHdGHTFxgR8M7XuZ0bL6sMTMq47Kx47etdYk6rc1u5qcWogceYA5o6c= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=amd.com; Received: from MW3PR12MB4553.namprd12.prod.outlook.com (2603:10b6:303:2c::19) by DM4PR12MB6399.namprd12.prod.outlook.com (2603:10b6:8:b7::15) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.8943.30; Tue, 22 Jul 2025 19:34:29 +0000 Received: from MW3PR12MB4553.namprd12.prod.outlook.com ([fe80::b0ef:2936:fec1:3a87]) by MW3PR12MB4553.namprd12.prod.outlook.com ([fe80::b0ef:2936:fec1:3a87%3]) with mapi id 15.20.8943.028; Tue, 22 Jul 2025 19:34:28 +0000 Message-ID: Date: Tue, 22 Jul 2025 14:34:23 -0500 User-Agent: Mozilla Thunderbird Reply-To: babu.moger@amd.com Subject: Re: [PATCH v15 25/34] fs/resctrl: Add definitions for MBM event configuration To: Reinette Chatre , corbet@lwn.net, tony.luck@intel.com, james.morse@arm.com, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com Cc: Dave.Martin@arm.com, x86@kernel.org, hpa@zytor.com, akpm@linux-foundation.org, paulmck@kernel.org, rostedt@goodmis.org, Neeraj.Upadhyay@amd.com, david@redhat.com, arnd@arndb.de, fvdl@google.com, seanjc@google.com, jpoimboe@kernel.org, pawan.kumar.gupta@linux.intel.com, xin@zytor.com, manali.shukla@amd.com, tao1.su@linux.intel.com, sohil.mehta@intel.com, kai.huang@intel.com, xiaoyao.li@intel.com, peterz@infradead.org, xin3.li@intel.com, kan.liang@linux.intel.com, mario.limonciello@amd.com, thomas.lendacky@amd.com, perry.yuan@amd.com, gautham.shenoy@amd.com, chang.seok.bae@intel.com, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, peternewman@google.com, eranian@google.com References: <4a08cb0b35f3f7aa759cad20cea0733f9480cb34.1752013061.git.babu.moger@amd.com> <48df72bd-edcd-483f-8ad6-318a40b07f08@intel.com> Content-Language: en-US From: "Moger, Babu" In-Reply-To: <48df72bd-edcd-483f-8ad6-318a40b07f08@intel.com> Content-Type: text/plain; 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The user can specify the memory transaction(s) for the >> counter to track. >> >> Add the definitions for supported memory transactions (e.g., read, write, >> etc.) the counter can be configured with. >> >> Signed-off-by: Babu Moger >> --- > > ... > >> --- >> fs/resctrl/internal.h | 11 +++++++++++ >> fs/resctrl/monitor.c | 11 +++++++++++ >> include/linux/resctrl_types.h | 3 +++ >> 3 files changed, 25 insertions(+) >> >> diff --git a/fs/resctrl/internal.h b/fs/resctrl/internal.h >> index fb4fec4a4cdc..63526400e632 100644 >> --- a/fs/resctrl/internal.h >> +++ b/fs/resctrl/internal.h >> @@ -216,6 +216,17 @@ struct rdtgroup { >> struct pseudo_lock_region *plr; >> }; >> >> +/** >> + * struct mbm_transaction - Memory transaction an MBM event can be configured with. >> + * @name: Name of memory transaction (read, write ...). >> + * @val: The bit used to represent the memory transaction within an >> + * event's configuration. > > Please include something similar to the mon_evt::evt_cfg kernel-doc to help reader > know where bit values come from. For example, > > * @val: The bit (eg. READS_TO_LOCAL_MEM or READS_TO_REMOTE_MEM) used to represent > * the memory transaction within an event's configuration. > Sure. >> + */ >> +struct mbm_transaction { >> + char name[32]; >> + u32 val; >> +}; >> + >> /* rdtgroup.flags */ >> #define RDT_DELETED 1 >> >> diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c >> index 35faca7ff3b1..1670163649e7 100644 >> --- a/fs/resctrl/monitor.c >> +++ b/fs/resctrl/monitor.c >> @@ -920,6 +920,17 @@ u32 resctrl_get_mon_evt_cfg(enum resctrl_event_id evtid) >> return mon_event_all[evtid].evt_cfg; >> } >> >> +/* Decoded values for each type of memory transactions */ > > "transactions" -> "transaction."? > Sure. >> +struct mbm_transaction mbm_transactions[NUM_MBM_TRANSACTIONS] = { >> + {"local_reads", READS_TO_LOCAL_MEM}, >> + {"remote_reads", READS_TO_REMOTE_MEM}, >> + {"local_non_temporal_writes", NON_TEMP_WRITE_TO_LOCAL_MEM}, >> + {"remote_non_temporal_writes", NON_TEMP_WRITE_TO_REMOTE_MEM}, >> + {"local_reads_slow_memory", READS_TO_LOCAL_S_MEM}, >> + {"remote_reads_slow_memory", READS_TO_REMOTE_S_MEM}, >> + {"dirty_victim_writes_all", DIRTY_VICTIMS_TO_ALL_MEM}, >> +}; >> + >> /** >> * resctrl_mon_resource_init() - Initialise global monitoring structures. >> * >> diff --git a/include/linux/resctrl_types.h b/include/linux/resctrl_types.h >> index d98351663c2c..acfe07860b34 100644 >> --- a/include/linux/resctrl_types.h >> +++ b/include/linux/resctrl_types.h >> @@ -34,6 +34,9 @@ >> /* Max event bits supported */ >> #define MAX_EVT_CONFIG_BITS GENMASK(6, 0) >> >> +/* Number of memory transactions that an MBM event can be configured with */ >> +#define NUM_MBM_TRANSACTIONS 7 >> + >> /* Event IDs */ >> enum resctrl_event_id { >> /* Must match value of first event below */ > > Reinette > -- Thanks Babu Moger