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Semantic conventions for CPU metrics

Status: Development

CPU metrics hw.cpu.*

Physical processor (as opposed to the logical processor seen by the operating system for multi-core systems). A physical processor may include many individual cores.

hw.type MUST be set to "cpu".

All CPU metrics may include the below attributes:

Attributes:

Key Stability Requirement Level Value Type Description Example Values
hw.id Development Required string An identifier for the hardware component, unique within the monitored host win32battery_battery_testsysa33_1
hw.model Development Recommended string Descriptive model name of the hardware component PERC H740P; Intel(R) Core(TM) i7-10700K; Dell XPS 15 Battery
hw.name Development Recommended string An easily-recognizable name for the hardware component eth0
hw.parent Development Recommended string Unique identifier of the parent component (typically the hw.id attribute of the enclosure, or disk controller) dellStorage_perc_0
hw.vendor Development Recommended string Vendor name of the hardware component Dell; HP; Intel; AMD; LSI; Lenovo

Metric: hw.errors (CPU)

This metric is recommended.

Total number of errors encountered and corrected by the CPU.

When using this metric, the following attributes MUST be set:

  • hw.type MUST be set to "cpu" to indicate that the errors are from a CPU.
Name Instrument Type Unit (UCUM) Description Stability Entity Associations
hw.errors Counter {error} Number of errors encountered by the component. Development

Attributes:

Key Stability Requirement Level Value Type Description Example Values
hw.id Development Required string An identifier for the hardware component, unique within the monitored host win32battery_battery_testsysa33_1
hw.type Development Required string Type of the component [1] battery; cpu; disk_controller
error.type Stable Conditionally Required if and only if an error has occurred string The type of error encountered by the component. [2] uncorrected; zero_buffer_credit; crc; bad_sector
hw.name Development Recommended string An easily-recognizable name for the hardware component eth0
hw.parent Development Recommended string Unique identifier of the parent component (typically the hw.id attribute of the enclosure, or disk controller) dellStorage_perc_0
network.io.direction Development Recommended string Direction of network traffic for network errors. [3] receive; transmit

[1] hw.type: Describes the category of the hardware component for which hw.state is being reported. For example, hw.type=temperature along with hw.state=degraded would indicate that the temperature of the hardware component has been reported as degraded.

[2] error.type: The error.type SHOULD match the error code reported by the component, the canonical name of the error, or another low-cardinality error identifier. Instrumentations SHOULD document the list of errors they report.

[3] network.io.direction: This attribute SHOULD only be used when hw.type is set to "network" to indicate the direction of the error.

error.type has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value Description Stability
_OTHER A fallback error value to be used when the instrumentation doesn't define a custom value. Stable

hw.type has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value Description Stability
battery Battery Development
cpu CPU Development
disk_controller Disk controller Development
enclosure Enclosure Development
fan Fan Development
gpu GPU Development
logical_disk Logical disk Development
memory Memory Development
network Network Development
physical_disk Physical disk Development
power_supply Power supply Development
tape_drive Tape drive Development
temperature Temperature Development
voltage Voltage Development

network.io.direction has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value Description Stability
receive receive Development
transmit transmit Development

Metric: hw.cpu.speed

This metric is recommended.

Name Instrument Type Unit (UCUM) Description Stability Entity Associations
hw.cpu.speed Gauge Hz CPU current frequency. Development

Attributes:

Key Stability Requirement Level Value Type Description Example Values
hw.id Development Required string An identifier for the hardware component, unique within the monitored host win32battery_battery_testsysa33_1
hw.model Development Recommended string Descriptive model name of the hardware component PERC H740P; Intel(R) Core(TM) i7-10700K; Dell XPS 15 Battery
hw.name Development Recommended string An easily-recognizable name for the hardware component eth0
hw.parent Development Recommended string Unique identifier of the parent component (typically the hw.id attribute of the enclosure, or disk controller) dellStorage_perc_0
hw.vendor Development Recommended string Vendor name of the hardware component Dell; HP; Intel; AMD; LSI; Lenovo

Metric: hw.cpu.speed.limit

This metric is recommended.

Name Instrument Type Unit (UCUM) Description Stability Entity Associations
hw.cpu.speed.limit Gauge Hz CPU maximum frequency. Development

Attributes:

Key Stability Requirement Level Value Type Description Example Values
hw.id Development Required string An identifier for the hardware component, unique within the monitored host win32battery_battery_testsysa33_1
hw.limit_type Development Recommended string Type of limit for hardware components throttled; max; turbo
hw.model Development Recommended string Descriptive model name of the hardware component PERC H740P; Intel(R) Core(TM) i7-10700K; Dell XPS 15 Battery
hw.name Development Recommended string An easily-recognizable name for the hardware component eth0
hw.parent Development Recommended string Unique identifier of the parent component (typically the hw.id attribute of the enclosure, or disk controller) dellStorage_perc_0
hw.vendor Development Recommended string Vendor name of the hardware component Dell; HP; Intel; AMD; LSI; Lenovo

hw.limit_type has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value Description Stability
critical Critical Development
degraded Degraded Development
high.critical High Critical Development
high.degraded High Degraded Development
low.critical Low Critical Development
low.degraded Low Degraded Development
max Maximum Development
throttled Throttled Development
turbo Turbo Development

Metric: hw.status (CPU)

This metric is recommended.

Operational status: 1 (true) or 0 (false) for each of the possible states.

When using this metric for CPU status, the following attributes MUST be set:

  • hw.type MUST be set to "cpu" to indicate that the status is for a CPU.
  • hw.state MUST be set to one of the following values to indicate the CPU state:
    • "ok": The CPU is operating normally.
    • "degraded": The CPU is operating with reduced functionality or performance.
    • "failed": The CPU has failed and is not operational.
    • "predicted_failure": The CPU is currently operational but is predicted to fail soon.
Name Instrument Type Unit (UCUM) Description Stability Entity Associations
hw.status UpDownCounter 1 Operational status: 1 (true) or 0 (false) for each of the possible states. [1] Development

[1]: hw.status is currently specified as an UpDownCounter but would ideally be represented using a StateSet as defined in OpenMetrics. This semantic convention will be updated once StateSet is specified in OpenTelemetry. This planned change is not expected to have any consequence on the way users query their timeseries backend to retrieve the values of hw.status over time.

Attributes:

Key Stability Requirement Level Value Type Description Example Values
hw.id Development Required string An identifier for the hardware component, unique within the monitored host win32battery_battery_testsysa33_1
hw.state Development Required string The current state of the component degraded; failed; needs_cleaning
hw.type Development Required string Type of the component [1] battery; cpu; disk_controller
hw.name Development Recommended string An easily-recognizable name for the hardware component eth0
hw.parent Development Recommended string Unique identifier of the parent component (typically the hw.id attribute of the enclosure, or disk controller) dellStorage_perc_0

[1] hw.type: Describes the category of the hardware component for which hw.state is being reported. For example, hw.type=temperature along with hw.state=degraded would indicate that the temperature of the hardware component has been reported as degraded.

hw.state has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value Description Stability
degraded Degraded Development
failed Failed Development
needs_cleaning Needs Cleaning Development
ok OK Development
predicted_failure Predicted Failure Development

hw.type has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value Description Stability
battery Battery Development
cpu CPU Development
disk_controller Disk controller Development
enclosure Enclosure Development
fan Fan Development
gpu GPU Development
logical_disk Logical disk Development
memory Memory Development
network Network Development
physical_disk Physical disk Development
power_supply Power supply Development
tape_drive Tape drive Development
temperature Temperature Development
voltage Voltage Development