tools/perf/pmu-events/common_metrics.py
Source file repositories/reference/linux-study-clean/tools/perf/pmu-events/common_metrics.py
File Facts
- System
- Linux kernel
- Corpus path
tools/perf/pmu-events/common_metrics.py- Extension
.py- Size
- 956 bytes
- Lines
- 20
- Domain
- Support Tooling And Documentation
- Bucket
- tools
- Inferred role
- Support Tooling And Documentation: tools
- 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
# SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause)
from metric import (d_ratio, Event, Metric, MetricGroup)
def Cycles() -> MetricGroup:
cyc_k = Event("cpu\\-cycles:kHh") # exclude user and guest
cyc_g = Event("cpu\\-cycles:G") # exclude host
cyc_u = Event("cpu\\-cycles:uH") # exclude kernel, hypervisor and guest
cyc = cyc_k + cyc_g + cyc_u
return MetricGroup("lpm_cycles", [
Metric("lpm_cycles_total", "Total number of cycles", cyc, "cycles"),
Metric("lpm_cycles_user", "User cycles as a percentage of all cycles",
d_ratio(cyc_u, cyc), "100%"),
Metric("lpm_cycles_kernel", "Kernel cycles as a percentage of all cycles",
d_ratio(cyc_k, cyc), "100%"),
Metric("lpm_cycles_guest", "Hypervisor guest cycles as a percentage of all cycles",
d_ratio(cyc_g, cyc), "100%"),
], description="cycles breakdown per privilege level (users, kernel, guest)")
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.