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semantic-conventions/docs/hardware/cpu.md

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<!--- Hugo front matter used to generate the website version of this page:
linkTitle: CPU
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# Semantic conventions for CPU metrics
**Status**: [Development][DocumentStatus]
<!-- toc -->
- [CPU metrics `hw.cpu.*`](#cpu-metrics-hwcpu)
- [Metric: `hw.errors` (CPU)](#metric-hwerrors-cpu)
- [Metric: `hw.cpu.speed`](#metric-hwcpuspeed)
- [Metric: `hw.cpu.speed.limit`](#metric-hwcpuspeedlimit)
- [Metric: `hw.status` (CPU)](#metric-hwstatus-cpu)
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## 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:
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| Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`hw.id`](/docs/registry/attributes/hardware.md) | string | An identifier for the hardware component, unique within the monitored host | `win32battery_battery_testsysa33_1` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.model`](/docs/registry/attributes/hardware.md) | string | Descriptive model name of the hardware component | `PERC H740P`; `Intel(R) Core(TM) i7-10700K`; `Dell XPS 15 Battery` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.name`](/docs/registry/attributes/hardware.md) | string | An easily-recognizable name for the hardware component | `eth0` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.parent`](/docs/registry/attributes/hardware.md) | string | Unique identifier of the parent component (typically the `hw.id` attribute of the enclosure, or disk controller) | `dellStorage_perc_0` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.vendor`](/docs/registry/attributes/hardware.md) | string | Vendor name of the hardware component | `Dell`; `HP`; `Intel`; `AMD`; `LSI`; `Lenovo` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
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### Metric: `hw.errors` (CPU)
This metric is [recommended][MetricRecommended].
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.
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| Name | Instrument Type | Unit (UCUM) | Description | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `hw.errors` | Counter | `{error}` | Number of errors encountered by the component. | ![Development](https://img.shields.io/badge/-development-blue) | |
| Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`hw.id`](/docs/registry/attributes/hardware.md) | string | An identifier for the hardware component, unique within the monitored host | `win32battery_battery_testsysa33_1` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.type`](/docs/registry/attributes/hardware.md) | string | Type of the component [1] | `battery`; `cpu`; `disk_controller` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`error.type`](/docs/registry/attributes/error.md) | string | The type of error encountered by the component. [2] | `uncorrected`; `zero_buffer_credit`; `crc`; `bad_sector` | `Conditionally Required` if and only if an error has occurred | ![Stable](https://img.shields.io/badge/-stable-lightgreen) |
| [`hw.name`](/docs/registry/attributes/hardware.md) | string | An easily-recognizable name for the hardware component | `eth0` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.parent`](/docs/registry/attributes/hardware.md) | string | Unique identifier of the parent component (typically the `hw.id` attribute of the enclosure, or disk controller) | `dellStorage_perc_0` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`network.io.direction`](/docs/registry/attributes/network.md) | string | Direction of network traffic for network errors. [3] | `receive`; `transmit` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
**[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](https://img.shields.io/badge/-stable-lightgreen) |
---
`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](https://img.shields.io/badge/-development-blue) |
| `cpu` | CPU | ![Development](https://img.shields.io/badge/-development-blue) |
| `disk_controller` | Disk controller | ![Development](https://img.shields.io/badge/-development-blue) |
| `enclosure` | Enclosure | ![Development](https://img.shields.io/badge/-development-blue) |
| `fan` | Fan | ![Development](https://img.shields.io/badge/-development-blue) |
| `gpu` | GPU | ![Development](https://img.shields.io/badge/-development-blue) |
| `logical_disk` | Logical disk | ![Development](https://img.shields.io/badge/-development-blue) |
| `memory` | Memory | ![Development](https://img.shields.io/badge/-development-blue) |
| `network` | Network | ![Development](https://img.shields.io/badge/-development-blue) |
| `physical_disk` | Physical disk | ![Development](https://img.shields.io/badge/-development-blue) |
| `power_supply` | Power supply | ![Development](https://img.shields.io/badge/-development-blue) |
| `tape_drive` | Tape drive | ![Development](https://img.shields.io/badge/-development-blue) |
| `temperature` | Temperature | ![Development](https://img.shields.io/badge/-development-blue) |
| `voltage` | Voltage | ![Development](https://img.shields.io/badge/-development-blue) |
---
`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](https://img.shields.io/badge/-development-blue) |
| `transmit` | transmit | ![Development](https://img.shields.io/badge/-development-blue) |
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### Metric: `hw.cpu.speed`
This metric is [recommended][MetricRecommended].
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| Name | Instrument Type | Unit (UCUM) | Description | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `hw.cpu.speed` | Gauge | `Hz` | CPU current frequency. | ![Development](https://img.shields.io/badge/-development-blue) | |
| Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`hw.id`](/docs/registry/attributes/hardware.md) | string | An identifier for the hardware component, unique within the monitored host | `win32battery_battery_testsysa33_1` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.model`](/docs/registry/attributes/hardware.md) | string | Descriptive model name of the hardware component | `PERC H740P`; `Intel(R) Core(TM) i7-10700K`; `Dell XPS 15 Battery` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.name`](/docs/registry/attributes/hardware.md) | string | An easily-recognizable name for the hardware component | `eth0` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.parent`](/docs/registry/attributes/hardware.md) | string | Unique identifier of the parent component (typically the `hw.id` attribute of the enclosure, or disk controller) | `dellStorage_perc_0` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.vendor`](/docs/registry/attributes/hardware.md) | string | Vendor name of the hardware component | `Dell`; `HP`; `Intel`; `AMD`; `LSI`; `Lenovo` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
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### Metric: `hw.cpu.speed.limit`
This metric is [recommended][MetricRecommended].
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| Name | Instrument Type | Unit (UCUM) | Description | Stability | Entity Associations |
| -------- | --------------- | ----------- | -------------- | --------- | ------ |
| `hw.cpu.speed.limit` | Gauge | `Hz` | CPU maximum frequency. | ![Development](https://img.shields.io/badge/-development-blue) | |
| Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`hw.id`](/docs/registry/attributes/hardware.md) | string | An identifier for the hardware component, unique within the monitored host | `win32battery_battery_testsysa33_1` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.limit_type`](/docs/registry/attributes/hardware.md) | string | Type of limit for hardware components | `throttled`; `max`; `turbo` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.model`](/docs/registry/attributes/hardware.md) | string | Descriptive model name of the hardware component | `PERC H740P`; `Intel(R) Core(TM) i7-10700K`; `Dell XPS 15 Battery` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.name`](/docs/registry/attributes/hardware.md) | string | An easily-recognizable name for the hardware component | `eth0` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.parent`](/docs/registry/attributes/hardware.md) | string | Unique identifier of the parent component (typically the `hw.id` attribute of the enclosure, or disk controller) | `dellStorage_perc_0` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.vendor`](/docs/registry/attributes/hardware.md) | string | Vendor name of the hardware component | `Dell`; `HP`; `Intel`; `AMD`; `LSI`; `Lenovo` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
---
`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](https://img.shields.io/badge/-development-blue) |
| `degraded` | Degraded | ![Development](https://img.shields.io/badge/-development-blue) |
| `high.critical` | High Critical | ![Development](https://img.shields.io/badge/-development-blue) |
| `high.degraded` | High Degraded | ![Development](https://img.shields.io/badge/-development-blue) |
| `low.critical` | Low Critical | ![Development](https://img.shields.io/badge/-development-blue) |
| `low.degraded` | Low Degraded | ![Development](https://img.shields.io/badge/-development-blue) |
| `max` | Maximum | ![Development](https://img.shields.io/badge/-development-blue) |
| `throttled` | Throttled | ![Development](https://img.shields.io/badge/-development-blue) |
| `turbo` | Turbo | ![Development](https://img.shields.io/badge/-development-blue) |
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### Metric: `hw.status` (CPU)
This metric is [recommended][MetricRecommended].
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.
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| 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](https://img.shields.io/badge/-development-blue) | |
**[1]:** `hw.status` is currently specified as an *UpDownCounter* but would ideally be represented using a [*StateSet* as defined in OpenMetrics](https://github.com/prometheus/OpenMetrics/blob/v1.0.0/specification/OpenMetrics.md#stateset). 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.
| Attribute | Type | Description | Examples | [Requirement Level](https://opentelemetry.io/docs/specs/semconv/general/attribute-requirement-level/) | Stability |
|---|---|---|---|---|---|
| [`hw.id`](/docs/registry/attributes/hardware.md) | string | An identifier for the hardware component, unique within the monitored host | `win32battery_battery_testsysa33_1` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.state`](/docs/registry/attributes/hardware.md) | string | The current state of the component | `degraded`; `failed`; `needs_cleaning` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.type`](/docs/registry/attributes/hardware.md) | string | Type of the component [1] | `battery`; `cpu`; `disk_controller` | `Required` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.name`](/docs/registry/attributes/hardware.md) | string | An easily-recognizable name for the hardware component | `eth0` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
| [`hw.parent`](/docs/registry/attributes/hardware.md) | string | Unique identifier of the parent component (typically the `hw.id` attribute of the enclosure, or disk controller) | `dellStorage_perc_0` | `Recommended` | ![Development](https://img.shields.io/badge/-development-blue) |
**[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](https://img.shields.io/badge/-development-blue) |
| `failed` | Failed | ![Development](https://img.shields.io/badge/-development-blue) |
| `needs_cleaning` | Needs Cleaning | ![Development](https://img.shields.io/badge/-development-blue) |
| `ok` | OK | ![Development](https://img.shields.io/badge/-development-blue) |
| `predicted_failure` | Predicted Failure | ![Development](https://img.shields.io/badge/-development-blue) |
---
`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](https://img.shields.io/badge/-development-blue) |
| `cpu` | CPU | ![Development](https://img.shields.io/badge/-development-blue) |
| `disk_controller` | Disk controller | ![Development](https://img.shields.io/badge/-development-blue) |
| `enclosure` | Enclosure | ![Development](https://img.shields.io/badge/-development-blue) |
| `fan` | Fan | ![Development](https://img.shields.io/badge/-development-blue) |
| `gpu` | GPU | ![Development](https://img.shields.io/badge/-development-blue) |
| `logical_disk` | Logical disk | ![Development](https://img.shields.io/badge/-development-blue) |
| `memory` | Memory | ![Development](https://img.shields.io/badge/-development-blue) |
| `network` | Network | ![Development](https://img.shields.io/badge/-development-blue) |
| `physical_disk` | Physical disk | ![Development](https://img.shields.io/badge/-development-blue) |
| `power_supply` | Power supply | ![Development](https://img.shields.io/badge/-development-blue) |
| `tape_drive` | Tape drive | ![Development](https://img.shields.io/badge/-development-blue) |
| `temperature` | Temperature | ![Development](https://img.shields.io/badge/-development-blue) |
| `voltage` | Voltage | ![Development](https://img.shields.io/badge/-development-blue) |
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[DocumentStatus]: https://opentelemetry.io/docs/specs/otel/document-status
[MetricRecommended]: /docs/general/metric-requirement-level.md#recommended
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