Intel® VTune™ Profiler User Guide

User Guide

  • 2020
  • 06/18/2020
  • Public Content
Contents

Control Window Synchronization

Correlate the data displayed in the
Bottom-up
 window for each program unit (bottom-up analysis) and in the
Top-down Tree
 window for an overall impact of each element together with its callees (top-down analysis).
The
Top-down Tree
 window includes Self Time and Total Time columns for each data column in the
Bottom-up
 window:
Top-down Tree Pane
In the Threading Efficiency example above, columns in the
Top-down Tree
 window match the columns in the
Bottom-up
 window as follows:
Bottom-up Window
Top-down Tree Window
Wait Time by Thread Concurrency
Wait Time: Total by Thread Concurrency
Wait Time: Self by Thread Concurrency
Wait Count
Wait Count: Total
Wait Count: Self
The
Bottom-up
 window provides only
Self
 type of data (function without callees). In the grid, Self time/Count column headers do not have
:
suffix
 .
The
Total
 type of data (function + all callees' Self data) is provided in the
<
data
 >:Total
 column and unique to the
Top-down Tree
 window. In the example above, these are the
Wait Time:Total by Utilization
 and
Wait Count:Total
 columns.
Self time for a program unit in the
Bottom-up
 window equals the sum of Self time values for the same program unit in different call sequences in the
Top-down Tree
 window.

Product and Performance Information

1

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