> ## Documentation Index
> Fetch the complete documentation index at: https://dragonwingdocs.qualcomm.com/llms.txt
> Use this file to discover all available pages before exploring further.

# 验证热状态

热日志有助于了解热区的当前激活配置和现有的热缓解级别。要获取热配置和当前激活的缓解级别,请使用 ftrace 日志。

## **ftrace 方法**

要启用热管理 ftrace 日志,请运行以下命令:

```text theme={null}
echo 1 > /sys/kernel/tracing/events/thermal/enable
```

<Tabs>
  <Tab title="QCS6490/QCS5430">
    以下是不同热事件的日志片段:

    ```text theme={null}
    /* In the following snippet, "cpu0-thermal" represents thermal zone and “temp” indicates existing temperature of thermal zone */
    sh-1420    [001] ..... 1132975.934216: thermal_temperature: thermal_zone=cpu0-thermal id=13 temp_prev=47700 temp=110000
    /*In the following snippet, “trip” indicates trip level and trip level 1 is triggered for cpu0-thermal thermal zone*/
    sh-1420    [001] ..... 1132975.934449: thermal_zone_trip: thermal_zone=cpu0-thermal id=13 trip=1 trip_type=PASSIVE
    /*In the following snippet, “type” represents the cooling device and "target" represents active mitigation of the cooling device*/
    sh-1420 [001] ..... 1132975.934473: cdev_update: type=idle-cpu0 target=100
    ```
  </Tab>

  <Tab title="IQ-9075">
    以下是 IQ-9075 缓解触发和清除热事件的日志片段:

    ```text theme={null}
    /* In the following snippet, " cpu-1-2-1-thermal" represents thermal zone
    and “trip” indicates trip level and trip level 1 is triggered for
    cpu-1-2-1-thermal thermal zone*/
    irq/222-c252000-115     [000] ..... 250901.340001:
    thermal_zone_trip: thermal_zone=cpu-1-2-1-thermal
    id=16 trip=1 trip_type=PASSIVE
    /*In the following snippet, “type” represents the cooling device and "target" represents active mitigation of the cooling device*/
    irq/222-c252000-115     [000] ..... 250901.340009: cdev_update: type=idle-cpu6 target=100 kworker/u17:0-23271   [000] ..... 250901.355101:
    thermal_temperature: thermal_zone=cpu-1-2-1-thermal id=16 temp_prev=30100 temp=34100
    kworker/u17:0-23271   [000] ..... 250901.339084: thermal_temperature: thermal_zone=cpu-1-2-1-thermal id=16 temp_prev=30100 temp=29800
    kworker/u17:0-23271   [000] ..... 250901.339139: cdev_update: type=idle-cpu6 target=0
    ```
  </Tab>
</Tabs>

**注意**

IQ-8275 和 IQ-615 的日志片段将在未来的版本中更新。