TraceCmdCollector

public class TraceCmdCollector
extends AtraceCollector

java.lang.Object
↳	com.android.tradefed.device.metric.BaseDeviceMetricCollector
	↳	com.android.tradefed.device.metric.AtraceCollector
		↳	com.android.tradefed.device.metric.TraceCmdCollector

A IMetricCollector that collects traces during the test using trace-cmd, and logs them to the invocation.

This trace collector allows for USB disconnection during the test (as in power testing).

The system default tool, atrace, is used in tandem with this collector to set the android-specific sysfs flags.

A trace-cmd (https://git.kernel.org/pub/scm/linux/kernel/git/rostedt/trace-cmd.git) binary compatible with Android must be specified.

This will upload the trace.dat format (see man 5 trace-cmd.dat) produced by trace-cmd.

Summary

Public constructors
`TraceCmdCollector()`

Protected methods
`LogDataType`	`getLogType()`
`void`	`startTracing(ITestDevice device)`
`void`	`stopTracing(ITestDevice device)`

public TraceCmdCollector ()

protected LogDataType getLogType ()

Returns
`LogDataType`

protected void startTracing (ITestDevice device)

Parameters
`device`	`ITestDevice`

Throws
`DeviceNotAvailableException`

protected void stopTracing (ITestDevice device)

Parameters
`device`	`ITestDevice`

Throws
`DeviceNotAvailableException`