User Guide


Viewing Instrumentation and Tracing Technology (ITT) API Task Data in
Intel® VTune™

User task and API data can be visualized in
Intel® VTune™
performance analysis results.
After you have added basic annotations to your application to control performance data collection, you can view these annotations in the
Intel VTune
timeline. All supported instrumentation and tracing technology (ITT) API tasks can be visualized in
Use the following steps to include ITT API tasks in your performance analysis collection:
  1. Click the (standalone GUI)/ (Visual Studio IDE)
    Configure Analysis
    button on the
    Intel® VTune™
    Configure Analysis
    window opens.
  2. Set up the analysis target in the
  3. From
    pane, click the Browse button and select an analysis type. For more information about each analysis type, see Performance Analysis Setup.
  4. Select the
    Analyze user tasks, events, and counters
    checkbox to view the API tasks, counters, and events that you added to your application code.
    In some cases, the
    Analyze user tasks, events, and counters
    checkbox is in the expandable
    section. To enable the checkbox, use the
    button at the top of the tab to create an editable version of the analysis type configuration. For more information, see Custom Analysis .
  5. Click the Start button to run the analysis.
After collection completes, the analysis results appear in a viewpoint specific to the analysis type selected. The API data collected is available in the following locations:
  • Timeline view: Each API type appears differently on the timeline view. In the example below, the code was instrumented with the task API, frame API, event API, and collection control API. Tasks appear as yellow bars on the task thread. Frames appear at the top of the timeline in pink. Events appear on the appropriate thread as a triangle at the event time. Collection control events span the entire timeline. Hover over a task, frame, or event to view the type of API task.
  • Grid view: Set the
    Task Domain / Task Type / Function / Call Stack
    Task Type / Function / Call Stack
    to view task data in the grid pane.
  • Platform tab: Individual tasks are available in a larger view on the
    tab. Hover over a task to get more information.

Product and Performance Information


Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804