linux-kernel - [PATCH v3 23/26] fs/resctrl: Add new telemetry event id and structures

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Message-ID: <20250407234032.241215-24-tony.luck@intel.com>
Date: Mon,  7 Apr 2025 16:40:25 -0700
From: Tony Luck <tony.luck@...el.com>
To: Fenghua Yu <fenghuay@...dia.com>,
	Reinette Chatre <reinette.chatre@...el.com>,
	Maciej Wieczor-Retman <maciej.wieczor-retman@...el.com>,
	Peter Newman <peternewman@...gle.com>,
	James Morse <james.morse@....com>,
	Babu Moger <babu.moger@....com>,
	Drew Fustini <dfustini@...libre.com>,
	Dave Martin <Dave.Martin@....com>,
	Anil Keshavamurthy <anil.s.keshavamurthy@...el.com>
Cc: linux-kernel@...r.kernel.org,
	patches@...ts.linux.dev,
	Tony Luck <tony.luck@...el.com>
Subject: [PATCH v3 23/26] fs/resctrl: Add new telemetry event id and structures

Nine new events for energy and perf monitoring per-RMID.

Signed-off-by: Tony Luck <tony.luck@...el.com>
---
 include/linux/resctrl_types.h | 19 ++++++++++++---
 fs/resctrl/monitor.c          | 45 +++++++++++++++++++++++++++++++++++
 2 files changed, 61 insertions(+), 3 deletions(-)

diff --git a/include/linux/resctrl_types.h b/include/linux/resctrl_types.h
index 3354f21e82ad..2c959e7233dd 100644
--- a/include/linux/resctrl_types.h
+++ b/include/linux/resctrl_types.h
@@ -46,16 +46,29 @@ enum resctrl_res_level {
 };
 
 /*
- * Event IDs, the values match those used to program IA32_QM_EVTSEL before
- * reading IA32_QM_CTR on RDT systems.
+ * Event IDs
  */
 enum resctrl_event_id {
+	/* Legacy events. Values must match X86 IA32_QM_EVTSEL usage */
 	QOS_L3_OCCUP_EVENT_ID		= 0x01,
 	QOS_L3_MBM_TOTAL_EVENT_ID	= 0x02,
 	QOS_L3_MBM_LOCAL_EVENT_ID	= 0x03,
+
+	/* Intel Telemetry Events */
+	PMT_EVENT_ENERGY,
+	PMT_EVENT_ACTIVITY,
+	PMT_EVENT_STALLS_LLC_HIT,
+	PMT_EVENT_C1_RES,
+	PMT_EVENT_UNHALTED_CORE_CYCLES,
+	PMT_EVENT_STALLS_LLC_MISS,
+	PMT_EVENT_AUTO_C6_RES,
+	PMT_EVENT_UNHALTED_REF_CYCLES,
+	PMT_EVENT_UOPS_RETIRED,
+
+	/* Must be the last */
+	QOS_NUM_EVENTS
 };
 
-#define QOS_NUM_EVENTS		(QOS_L3_MBM_LOCAL_EVENT_ID + 1)
 #define QOS_NUM_MBM_EVENTS	(QOS_L3_MBM_LOCAL_EVENT_ID - QOS_L3_MBM_TOTAL_EVENT_ID + 1)
 #define MBM_EVENT_IDX(evt)	((evt) - QOS_L3_MBM_TOTAL_EVENT_ID)
 
diff --git a/fs/resctrl/monitor.c b/fs/resctrl/monitor.c
index 5846a13c631a..0207c9ed2d47 100644
--- a/fs/resctrl/monitor.c
+++ b/fs/resctrl/monitor.c
@@ -861,6 +861,51 @@ static struct mon_evt all_events[QOS_NUM_EVENTS] = {
 		.rid	= RDT_RESOURCE_L3,
 		.type	= EVT_TYPE_U64,
 	},
+	[PMT_EVENT_ENERGY] = {
+		.name	= "core_energy",
+		.evtid	= PMT_EVENT_ENERGY,
+		.rid	= RDT_RESOURCE_PERF_PKG,
+	},
+	[PMT_EVENT_ACTIVITY] = {
+		.name	= "activity",
+		.evtid	= PMT_EVENT_ACTIVITY,
+		.rid	= RDT_RESOURCE_PERF_PKG,
+	},
+	[PMT_EVENT_STALLS_LLC_HIT] = {
+		.name	= "stalls_llc_hit",
+		.evtid	= PMT_EVENT_STALLS_LLC_HIT,
+		.rid	= RDT_RESOURCE_PERF_PKG,
+	},
+	[PMT_EVENT_C1_RES] = {
+		.name	= "c1_res",
+		.evtid	= PMT_EVENT_C1_RES,
+		.rid	= RDT_RESOURCE_PERF_PKG,
+	},
+	[PMT_EVENT_UNHALTED_CORE_CYCLES] = {
+		.name	= "unhalted_core_cycles",
+		.evtid	= PMT_EVENT_UNHALTED_CORE_CYCLES,
+		.rid	= RDT_RESOURCE_PERF_PKG,
+	},
+	[PMT_EVENT_STALLS_LLC_MISS] = {
+		.name	= "stalls_llc_miss",
+		.evtid	= PMT_EVENT_STALLS_LLC_MISS,
+		.rid	= RDT_RESOURCE_PERF_PKG,
+	},
+	[PMT_EVENT_AUTO_C6_RES] = {
+		.name	= "c6_res",
+		.evtid	= PMT_EVENT_AUTO_C6_RES,
+		.rid	= RDT_RESOURCE_PERF_PKG,
+	},
+	[PMT_EVENT_UNHALTED_REF_CYCLES] = {
+		.name	= "unhalted_ref_cycles",
+		.evtid	= PMT_EVENT_UNHALTED_REF_CYCLES,
+		.rid	= RDT_RESOURCE_PERF_PKG,
+	},
+	[PMT_EVENT_UOPS_RETIRED] = {
+		.name	= "uops_retired",
+		.evtid	= PMT_EVENT_UOPS_RETIRED,
+		.rid	= RDT_RESOURCE_PERF_PKG,
+	},
 };
 
 int resctrl_set_event_attributes(enum resctrl_event_id evt,
-- 
2.48.1