tools/perf/pmu-events/arch/arm64/freescale/imx91/sys/metrics.json
Source file repositories/reference/linux-study-clean/tools/perf/pmu-events/arch/arm64/freescale/imx91/sys/metrics.json
File Facts
- System
- Linux kernel
- Corpus path
tools/perf/pmu-events/arch/arm64/freescale/imx91/sys/metrics.json- Extension
.json- Size
- 1159 bytes
- Lines
- 27
- 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.
- Repository support layer: documentation, build tooling, samples, user-space helper tools, generated initramfs support, licenses, and validation utilities.
Dependency Surface
- No C-style include directives detected by the generator.
Detected Declarations
- No top-level syscall, struct, function, initcall, or export declaration detected by the generator.
Annotated Snippet
[
{
"BriefDescription": "bandwidth usage for lpddr4 evk board",
"MetricName": "imx91_bandwidth_usage.lpddr4",
"MetricExpr": "(((( imx9_ddr0@ddrc_pm_0@ ) * 2 * 8 ) + (( imx9_ddr0@ddrc_pm_3@ + imx9_ddr0@ddrc_pm_5@ + imx9_ddr0@ddrc_pm_7@ + imx9_ddr0@ddrc_pm_9@ - imx9_ddr0@ddrc_pm_2@ - imx9_ddr0@ddrc_pm_4@ - imx9_ddr0@ddrc_pm_6@ - imx9_ddr0@ddrc_pm_8@ ) * 32 )) / duration_time) / (2400 * 1000000 * 2)",
"ScaleUnit": "1e2%",
"Unit": "imx9_ddr",
"Compat": "imx91"
},
{
"BriefDescription": "bytes all masters read from ddr",
"MetricName": "imx91_ddr_read.all",
"MetricExpr": "( imx9_ddr0@ddrc_pm_0@ ) * 2 * 8",
"ScaleUnit": "9.765625e-4KB",
"Unit": "imx9_ddr",
"Compat": "imx91"
},
{
"BriefDescription": "bytes all masters write to ddr",
"MetricName": "imx91_ddr_write.all",
"MetricExpr": "( imx9_ddr0@ddrc_pm_3@ + imx9_ddr0@ddrc_pm_5@ + imx9_ddr0@ddrc_pm_7@ + imx9_ddr0@ddrc_pm_9@ - imx9_ddr0@ddrc_pm_2@ - imx9_ddr0@ddrc_pm_4@ - imx9_ddr0@ddrc_pm_6@ - imx9_ddr0@ddrc_pm_8@ ) * 32",
"ScaleUnit": "9.765625e-4KB",
"Unit": "imx9_ddr",
"Compat": "imx91"
}
]
Annotation
- Atlas domain: Support Tooling And Documentation / tools.
- Implementation status: atlas-only.
Implementation Notes
- This generated page is the file-by-file coverage layer; curated subsystem chapters should link here when they synthesize a multi-file control flow.
- Core OS pages should be promoted from atlas-only to deep-reviewed when they explain data structures, invariants, locking, lifecycle, and C implementation snippets.
- Driver-family pages are intentionally pattern-oriented unless they are part of the selected PCIe/NVMe representative device path.