Export (0) Print
Expand All

How to: Attach the Profiler to a .NET Service to Collect Memory Data by Using the Command Line

This topic describes how to use Visual Studio Profiling Tools command-line tools to attach the profiler to a .NET Framework service and collect memory data. You can collect data about the number and size of memory allocations, and you can also collect data about the lifetime of memory objects.

NoteNote

Command-line tools of the Profiling Tools are located in the \Team Tools\Performance Tools subdirectory of the Visual Studio installation directory. On 64 bit computers, both 64 bit and 32 bit versions of the tools are available. To use the profiler command-line tools, you must add the tools path to the PATH environment variable of the command prompt window or add it to to the command itself. For more information, see Specifying the Path to Profiling Tools Command Line Tools.

To collect memory data from a .NET Framework service, you use the VSPerfCLREnv.cmd tool to initialize the appropriate environment variables on the computer that hosts the service. The computer must be restarted to configure it for profiling.

You then use the VSPerfCmd tool to attach the profiler to the service process. While the profiler is attached to the service, you can pause and resume data collection.

To end a profiling session, the profiler must be detached from the service and the profiler must be explicitly shut down. In most cases, we recommend clearing the profiling environment variables at the end of a session.

To attach the Profiler to a .NET Framework service

  1. If necessary, install the service.

  2. Open a command prompt window.

  3. Initialize the profiling environment variables. Type:

    VSPerfClrEnv {/globalsamplegc /globalsamplegclife}[/samplelineoff]

    • The options /globalsamplegclife and /globalsamplegclife specify the type of memory data to collect. Specify one and only one of the following options.

    /globalsamplegc

    Enables the collection of memory allocation data.

    /globalsamplegclife

    Enables the collection of both memory allocation data and object lifetime data.

    • The /samplelineoff option disables the collection of source code line number data.

  4. Restart the computer to set the new environment configuration.

  5. If necessary, start the service.

  6. Open a command prompt window. If necessary, add the profiler path to the PATH environment variable.

  7. Start the profiler. Type:

    VSPerfCmd /start:sample /output:OutputFile[Options]

    • The /start:sample option initializes the profiler.

    • The /output:OutputFile option is required with /start. OutputFile specifies the name and location of the profiling data (.vsp) file.

    You can use one or more of the following options with the /start:sample option.

    NoteNote

    The /user and /crosssession options are usually required for services.

    Option

    Description

    /user:[Domain\]UserName

    Specifies the domain and user name of the account that owns the process. This option is required if the process is running as a user other than the logged on user. The process owner is listed in the User Name column on the Processes tab of Windows Task Manager.

    /crosssession

    Enables profiling of processes in other logon sessions. This option is required if the ASP.NET application is running in a different session. The session id is listed in the Session ID column on the the Processes tab of Windows Task Manager. /CS can be specified as an abbreviation for /crosssession.

    /user:[Domain\]UserName

    Specifies the optional domain and user name of the logon account under which the service runs. The logon account is listed in the Log On As column of the service in the Windows Service Control Manager.

    /crosssession|cs

    Enables profiling of processes in other logon sessions.

    /wincounter:WinCounterPath

    Specifies a Windows performance counter to be collected during profiling.

    /automark:Interval

    Use with /wincounter only. Specifies the number of milliseconds between Windows performance counter collection events. Default is 500 ms.

    /events:Config

    Specifies an Event Tracing for Windows (ETW) event to be collected during profiling. ETW events are collected in a separate (.etl) file.

  8. Attach the profiler to the service. Type:

    VSPerfCmd /attach:{PID|ProcName} [/targetclr:Version]

    • Specify either the process ID or the process name of the service. You can view the process IDs and names of all running processes in Windows Task Manager.

    • targetclr:Version specifies the version of the common language runtime (CLR) to profile when more than one version of the runtime is loaded in an application. Optional.

While the service is running, you can use VSPerfCmd.exe options to stop and start the writing of data to the profiler data file. Controlling data collection enables you to collect data for a specific part of the program execution, such as starting or shutting down the application.

To start and stop data collection

  • The following pairs of VSPerfCmd options start and stop data collection. Specify each option on a separate command line. You can turn data collection on and off multiple times.

    Option

    Description

    /globalon /globaloff

    Starts (/globalon) or stops (/globaloff) data collection for all processes.

    /processon:PID/processoff:PID

    Starts (/processon) or stops (/processoff) data collection for the process specified by the process ID (PID).

    /attach:{PID|ProcName} /detach[:{PID|ProcName}]

    /attach starts to collect data for the process specified by the process ID or process name. /detach stops data collection for the specified process, or for all processes if a specific process is not specified.

  • You can also use the VSPerfCmd.exe /mark option to insert a profiling mark into the data file. The /mark command adds an identifier, a timestamp, and an optional user-defined text string. Marks can be used to filter the data in profiler reports and data views.

To end a profiling session, the profiler must not be collecting data. You can stop the collection of data from an application profiled with the sampling method by stopping the service or by calling the VSPerfCmd /detach option. You then call the VSPerfCmd /shutdown option to turn the profiler off and close the profiling data file. The VSPerfClrEnv /globaloff command clears the profiling environment variables, but the system configuration is not reset until the computer is restarted.

To end a profiling session

  1. Do one of the following to detach the profiler from the target application:

    • Stop the service.

      -or-

    • Type VSPerfCmd /detach

  2. Shut down the profiler. Type:

    VSPerfCmd /shutdown

  3. (Optional) Clear the profiling environment variables. Type:

    VSPerfClrEnv /globaloff

  4. Restart the computer.

Community Additions

ADD
Show:
© 2014 Microsoft