Intel® Advisor User Guide

User Guide

Contents

Customize
Offload Modeling
 Perspective

Customize the perspective flow to better fit your goal and your application.
If you change any of the analysis settings from the
Analysis Workflow
 tab, the accuracy level changes to
Custom
 automatically. With this accuracy level, you can customize the perspective flow and/or analysis properties.
To change the properties of a specific analysis:
  1. Expand the analysis details on the
    Analysis Workflow
     pane with .
  2. Select desired settings.
  3. For more detailed customization, click the
    gear
    icon. You will see the
    Project Properties
     dialog box open for the selected analysis.
  4. Select desired properties and click
    OK
    .
For a full set of available properties, click the icon on the left-side pane or go to
File
Project Properties
.
The following tables cover project properties applicable to the analyses in the
Offload Modeling
 perspective.

Common Properties

Use This
To Do This
Inherit settings from Visual Studio project
 checkbox and field (Visual Studio* IDE only)
Inherit
Intel Advisor
 project properties from the Visual Studio* startup project (enable).
If enabled, the
Application
,
Application parameters
, and
Working directory
 fields are pre-filled and cannot be modified.
Application
 field and
Browse...
 button
Select an analysis target executable or script.
If you specify a script in this field, consider specifying the executable in the
Advanced
Child application
 field (required for Dependencies analysis).
Application parameters
 field and
Modify...
 button
Specify runtime arguments to use when performing analysis (equivalent to command line arguments).
Use application directory as working directory
 checkbox
Automatically use the value in the
Application directory
 to pre-fill the
Working directory
 value (enable).
Working directory
 field and
Browse...
 button
Select the working directory.
User-defined environment variables
 field and
Modify...
 button
Specify environment variables to use during analysis.
Managed code profiling mode
 drop-down
  • Automatically detect the type of target executable as Native or Managed, and switch to that mode (choose
    Auto
    ).
  • Collect data for native code and do not attribute data to managed code (choose
    Native
    ).
  • Collect data for both native and managed code, and attribute data to managed code as appropriate (choose
    Mixed
    ). Consider using this option when analyzing a native executable that makes calls to managed code.
  • Collect data for both native and managed code, resolve samples attributed to native code, and attribute data to managed source only (choose
    Managed
    ). The call stack in the analysis result displays data for managed code only.
Child application
 field
Analyze a file that is not the starting application. For example: Analyze an executable (identified in this field) called by a script (identified in the
Application
 field).
Invoking these properties could decrease analysis overhead.
For the
Dependencies Analysis Type
: If you specify a script file in the
Application
 field, you must specify the target executable in the
Child application
 field.
Modules
 radio buttons, field, and
Modify...
 button
  • Analyze specific modules and disable analysis of all other modules (click the
    Include only the following module(s)
     radio button and choose the modules).
  • Disable analysis of specific modules and analyze all other modules (click the
    Exclude only the following module(s)
     radio button and choose the modules).
Including/excluding modules could minimize analysis overhead.
Use MPI launcher
 checkbox
Generate a command line (enable) that appears in the
Get command line
 field based on the following parameters:
  • Select MPI Launcher
     - Intel or another vendor
  • Number of ranks
     - Number of instances of the application
  • Profile ranks
     - All or a range of ranks to profile
Automatically stop collection after (sec)
 checkbox and field
Stop collection after a specified number of seconds (enable and specify seconds).
Invoking this property could minimize analysis overhead.

Survey Analysis Properties

Use This
To Do This
Automatically resume collection after (sec)
 checkbox and field
Start running your target application with collection paused, then resume collection after a specified number of seconds (enable and specify seconds).
Invoking this property could decrease analysis overhead.
The corresponding CLI action option is
--resume-after=<integer>
, where the integer argument is in milliseconds, not seconds.
Sampling Interval
 selector
Set the wait time between each analysis collection CPU sample while your target application is running.
Increasing the wait time could decrease analysis overhead.
Collection data limit, MB
 selector
Set the amount of collected raw data if exceeding a size threshold could cause issues. Not available for hardware event-based analyses.
Decreasing the limit could decrease analysis overhead.
Callstack unwinding mode
 drop-down list
Set to
After collection
 if:
  • Survey analysis runtime overhead exceeds 1.1x.
  • A large quantity of data is allocated on the stack, which is a common case for Fortran applications or applications with a large number of small, parallel, OpenMP* regions.
Otherwise, set to
During Collection
. This mode improves stack accuracy but increases overhead.
Stitch stacks
 checkbox
Restore a logical call tree for
Intel® oneAPI Threading Building Blocks
 (
oneTBB
) or OpenMP* applications by catching notifications from the runtime and attaching stacks to a point introducing a parallel workload (enable).
Disable if Survey analysis runtime overhead exceeds 1.1x.
Analyze MKL Loops and Functions
 checkbox
Show
Intel® oneAPI Math Kernel Library
 (
oneMKL
) loops and functions in
Intel Advisor
 reports (enable).
Enabling could increase analysis overhead.
Analyze Python loops and functions
 checkbox
Show Python* loops and functions in
Intel Advisor
 reports (enable).
Enabling could increase analysis overhead.
Analyze loops that reside in non-executed code paths
 checkbox
Collect a variety of data during analysis for loops that reside in non-executed code paths, including loop assembly code, instruction set architecture (ISA), and vector length (enable).
Enabling could increase analysis overhead.
Analyzing non-executed code paths in binaries that target multiple ISAs (contain multiple code paths) is available only for binaries compiled using the
-ax
 (Linux* OS) /
Qax
 (Windows* OS) option with an Intel compiler.
Enable registry spill/fill analysis
 checkbox
Calculate the number of consecutive load/store operations in registers and related memory traffic (enable).
Enabling could increase analysis overhead.
Enable static instruction mix analysis
 checkbox
Statically calculate the number of specific instructions present in the binary (enable).
Enabling could increase analysis overhead.
Source caching
 drop-down list
  • Delete source code cache from a project with each analysis run (default; choose
    Clear cached files
    ).
  • Keep source code cache within the project (choose
    Keep cached files
    ).

Trip Counts and FLOP Analysis Properties

Use This
To Do This
Inherit settings from the Survey Hotspots Analysis Type
 checkbox
Copy similar settings from Survey analysis properties (enable).
When enabled, this option disables application parameters controls.
Automatically resume collection after (sec)
 checkbox and field
Start running your target application with collection paused, then resume collection after a specified number of seconds (enable and specify seconds).
Invoking this property could decrease analysis overhead.
The corresponding CLI action option is
--resume-after=<integer>
, where the integer argument is in milliseconds, not seconds.
Trip Counts /
Collect information about Loop Trip Counts
 checkbox
Measure loop invocation and execution (enable).
FLOP /
Collect information about FLOP, L1 memory traffic, and AVX-512 mask usage
 checkbox
Measure floating-point operations, integer operations, and memory traffic (enable).
Callstacks /
Collect callstacks
 checkbox
Collect call stack information when performing analysis (enable).
Enabling could increase analysis overhead.
Capture metrics for dynamic loops and functions
 checkbox
Collect metrics for dynamic Just-In-Time (JIT) generated code regions.
Capture metrics for stripped binaries
 checkbox
Collect metrics for stripped binaries.
Enabling could increase analysis overhead.
Cache Simulation /
Enable Memory-Level Roofline with cache simulation
 checkbox
Model multiple levels of cache for data, such as counts of loaded or stored bytes for each loop, to plot the Roofline chart for all memory levels (enable).
Enabling could increase analysis overhead.
Cache simulator configuration
 field
Specify a cache hierarchy configuration to model (enable and specify hierarchy).
The hierarchy configuration template is:
[num_of_level1_caches]:[num_of_ways_level1_connected]:[level1_cache_size]:[level1_cacheline_size]/
[num_of_level2_caches]:[num_of_ways_level2_connected]:[level2_cache_size]:[level2_cacheline_size]/
[num_of_level3_caches]:[num_of_ways_level3_connected]:[level3_cache_size]:[level3_cacheline_size]
For example:
4:8w:32k:64l/4:4w:256k:64l/1:16w:6m:64l
is the hierarchy configuration for:
  • Four eight-way 32-KB level 1 caches with line size of 64 bytes
  • Four four-way 256-KB level 2 caches with line size of 64 bytes
  • One sixteen-way 6-MB level 3 cache with line size of 64 bytes
Data Transfer Simulation /
Data transfer simulation mode
 drop-down
Select a level of details for data transfer simulation:
  • Off
     - Disable data transfer simulation analysis.
  • Light
     - Model data transfers between host and device memory.
  • Medium
     - Model data transfers, attribute memory objects to loops that accessed the objects, and track accesses to stack memory.
  • Full
     - Model data transfers, attribute memory objects, track accesses to stack memory, and identify where data can be potentially reused if transferred between host and target.

Dependencies Analysis Properties

Use This
To Do This
Inherit settings from the Survey Hotspots Analysis Type
 checkbox
Copy similar settings from Survey analysis properties (enable).
When enabled, this option disables application parameters controls.
Suppression mode
 radio buttons
  • Report possible dependencies in system modules (choose the
    Show problems in system modules
     radio button).
  • Do not report possible dependencies in system modules (choose the
    Suppress problems in system modules
     radio button).
Loop call count limit
 selector
Choose the maximum number of instances each marked loop is analyzed. 0 = analyze all loop instances.
Supplying a non-zero value could decrease analysis overhead.
Instance of interest
 selector
Analyze the nth child process, where 1 = the first process of the specified name in the application process tree. 0 = analyze all processes.
Supplying a non-zero value could decrease analysis overhead.
Analyze stack variables
 checkbox
Analyze parallel data sharing for stack variables (enable).
Enabling could increase analysis overhead.
Filter stack variables by scope
 checkbox
Enable to report:
  • Variables initiated inside the loop as potential dependencies (warning)
  • Variables initialized outside the loop as dependencies (error)
Enabling could increase analysis overhead.
Reduction Detection /
Filter reduction variables
 checkbox
Mark all potential reductions by a specific diagnostic (enable).
Enabling could increase analysis overhead.

Performance Modeling Properties

Use This
To Do This
Assume Dependencies
 checkbox
Assume that loops have dependencies if their dependency type is unknown.
This option is available only from the
Analysis Workflow
 pane.
Single Kernel Launch Tax
 checkbox
Assume the invocation tax is paid only for the first kernel launch when estimating invocation taxes.
This option is available only from the
Analysis Workflow
 pane.
Data Reuse Analysis
 checkbox
Analyze potential data reuse between code regions for the data transferred between host and target platforms.
This option is available only from the
Analysis Workflow
 pane.
Make sure to set the
Data Transfer Analysis
 to the
Full
 mode in the
Characterization
 step to analyze data reuse.
Device configuration
drop-down
Select a pre-defined hardware configurations from a drop-down list to model application performance on.
Other parameters
field
Enter a space-separated list of command-line parameters. See Command Option Reference for available parameters.

Product and Performance Information

1

Performance varies by use, configuration and other factors. Learn more at www.Intel.com/PerformanceIndex.