CrossSession
Applies to: 
Visual Studio 
Visual Studio for Mac
Note
This article applies to Visual Studio 2017. If you're looking for the latest Visual Studio documentation, see Visual Studio documentation. We recommend upgrading to the latest version of Visual Studio. Download it here
The VSPerfCmd.exe CrossSession option enables the profiler to collect data from any console session. The CrossSession option must be used with the Start option.
You can use the abbreviation CS in place of CrossSession.
Syntax
VSPerfCmd.exe /Start:Method /CrossSession [Options]
Parameters
None
Valid Options
To enable profiling in another session, the CrossSession option must be specified with the Start option. CrossSession must also be specified in any subsequent VSPerfCmd Attach and Detach commands.
Start: Method
The Start option initializes the profiler to the specified profiling method.
Attach: PID[,PID] Begins profiling the specified processes.
Detach[:PID[,PID]] Stops profiling the specified processes.
Example
In this example, the CrossSession option is used to attach to an application that was started in another console session.
VSPerfCmd.exe /Start:Sample /Output:TestApp.exe.vsp /CrossSession
VSPerfCmd.exe /Attach:12345 /CS