tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metric.json

Source file repositories/reference/linux-study-clean/tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metric.json

File Facts

System
Linux kernel
Corpus path
tools/perf/pmu-events/arch/arm64/arm/cmn/sys/metric.json
Extension
.json
Size
2444 bytes
Lines
75
Domain
Support Tooling And Documentation
Bucket
tools
Inferred role
Support Tooling And Documentation: configuration, schema, or hardware description
Status
atlas-only

Why This File Exists

Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.

Dependency Surface

Detected Declarations

Annotated Snippet

[
	{
		"MetricName": "slc_miss_rate",
		"BriefDescription": "The system level cache miss rate.",
		"MetricGroup": "cmn",
		"MetricExpr": "hnf_cache_miss / hnf_slc_sf_cache_access",
		"ScaleUnit": "100%",
		"Unit": "arm_cmn",
		"Compat": "(434|436|43c|43a).*"
	},
	{
		"MetricName": "hnf_message_retry_rate",
		"BriefDescription": "HN-F message retry rate indicates whether a lack of credits is causing the bottlenecks.",
		"MetricGroup": "cmn",
		"MetricExpr": "hnf_pocq_retry / hnf_pocq_reqs_recvd",
		"ScaleUnit": "100%",
		"Unit": "arm_cmn",
		"Compat": "(434|436|43c|43a).*"
	},
	{
		"MetricName": "sf_hit_rate",
		"BriefDescription": "Snoop filter hit rate can be used to measure the snoop filter efficiency.",
		"MetricGroup": "cmn",
		"MetricExpr": "hnf_sf_hit / hnf_slc_sf_cache_access",
		"ScaleUnit": "100%",
		"Unit": "arm_cmn",
		"Compat": "(434|436|43c|43a).*"
	},
	{
		"MetricName": "mc_message_retry_rate",
		"BriefDescription": "The memory controller request retries rate indicates whether the memory controller is the bottleneck.",
		"MetricGroup": "cmn",
		"MetricExpr": "hnf_mc_retries / hnf_mc_reqs",
		"ScaleUnit": "100%",
		"Unit": "arm_cmn",
		"Compat": "(434|436|43c|43a).*"
	},
	{
		"MetricName": "rni_actual_read_bandwidth.all",
		"BriefDescription": "This event measure the actual bandwidth that RN-I bridge sends to the interconnect.",
		"MetricGroup": "cmn",
		"MetricExpr": "rnid_rxdat_flits * 32 / 1e6 / duration_time",
		"ScaleUnit": "1MB/s",
		"Unit": "arm_cmn",
		"Compat": "(434|436|43c|43a).*"
	},
	{
		"MetricName": "rni_actual_write_bandwidth.all",
		"BriefDescription": "This event measures the actual write bandwidth at RN-I bridges.",
		"MetricGroup": "cmn",
		"MetricExpr": "rnid_txdat_flits * 32 / 1e6 / duration_time",
		"ScaleUnit": "1MB/s",
		"Unit": "arm_cmn",
		"Compat": "(434|436|43c|43a).*"
	},
	{
		"MetricName": "rni_retry_rate",
		"BriefDescription": "RN-I bridge retry rate indicates whether the memory controller is the bottleneck.",
		"MetricGroup": "cmn",
		"MetricExpr": "rnid_txreq_flits_retried / rnid_txreq_flits_total",
		"ScaleUnit": "100%",
		"Unit": "arm_cmn",
		"Compat": "(434|436|43c|43a).*"
	},
	{
		"MetricName": "sbsx_actual_write_bandwidth.all",
		"BriefDescription": "sbsx actual write bandwidth.",
		"MetricGroup": "cmn",
		"MetricExpr": "sbsx_txdat_flitv * 32 / 1e6 / duration_time",
		"ScaleUnit": "1MB/s",

Annotation

Implementation Notes