Intel® Inspector User Guide for Linux* OS

Download PDF
ID 767796
Date 5/15/2022
Public

A newer version of this document is available. Customers should click here to go to the newest version.

Document Table of Contents
Document Table of Contents x
Intel® Inspector User Guide for Linux* OS
Intel® Inspector User Guide for Linux* OS x
Get Started Before You Begin Set Up a Project Collecting Results Investigating Results Testing for Regressions Use Cases Suppressions Support API Support Troubleshooting User Interface Reference Problem Type Reference Command Line Interface Support MPI Applications Support Appendix Notices and Disclaimers
Get Started x
Dynamic Analysis vs. Static Analysis Key Terminology Sample Applications and Tutorials Workflows-Quick Paths to Maximizing Productivity
Workflows-Quick Paths to Maximizing Productivity x
Analysis Workflow Reporting Workflow Regression Testing Workflow
Before You Begin x
Intel Inspector GUI Startup Tasks
Startup Tasks x
Change Result and Result Directory Name Templates Choose Baseline Results for Setting States Choose Debuggers Display Application Output
Set Up a Project x
Build Your Application Choose Projects Configure Projects
Choose Projects x
Choose Projects in the Intel Inspector GUI Create Projects in the Intel Inspector GUI
Configure Projects x
Binary/Symbol Search and Source Search Locations Choose Data Sets Manage Suppression Rules Search Non-standard Directories Set Project Properties-Advanced Setting Target Application Properties-Basic
Collecting Results x
Configuring Analyses Running Analyses Examining Result Data During Analysis
Configuring Analyses x
Memory Error Analysis Types Threading Error Analysis Types Managing Custom Analysis Types
Running Analyses x
Running Memory Error and Threading Error Analyses Stopping Analyses
Examining Result Data During Analysis x
Finding Memory Leaks On Demand Measuring Memory Growth
Investigating Results x
Viewing Results Choosing Problems Interpreting Result Data and Resolving Issues Investigating Problems Using Interactive Debugging Collaborating on Results Exporting and Importing Files Comparing Results
Viewing Results x
About Viewing Results Managing Help Snippet Displays Opening Results Showing Result Summaries
Choosing Problems x
Deselecting Filter Criteria Refining the Source File Set Selecting Filter Criteria Selecting Problems
Interpreting Result Data and Resolving Issues x
Severity Levels States Accessing Explain Problem Help Changing States Customizing Frame Presentation Customizing Data Columns Editing Source Code
Investigating Problems Using Interactive Debugging x
Extended Debugging Commands Stopping Analyses During Interactive Debugging
Collaborating on Results x
State Merge Merging States Across Results Reporting Result Data
Exporting and Importing Files x
Exporting Archives Importing Archives and Other Files
Testing for Regressions x
Testing for Regressions: Recommended Approach Testing for Regressions: Other Approaches
Use Cases x
Analyze Offloaded Code
Analyze Offloaded Code x
Example: Memory Problem Example: Threading Problem See Also
Suppressions Support x
Suppressions Support Using the GUI Suppressions Support Using Handwritten Suppression Rules Suppressions Support Using Third-party Suppression Rules
Suppressions Support Using the GUI x
Typical Suppressions Usage Model Using the GUI Suppression Rule Reach in the GUI Suppression Rule Examples in the GUI Defining Suppression Rules in the GUI Deleting Suppression Rules Applied to Marked Result Data in the GUI
Suppressions Support Using Handwritten Suppression Rules x
Typical Suppressions Usage Models Using Handwritten Suppression Files Suppression Rule Syntax in Text Format Suppression Rule Examples in Text Format
Suppressions Support Using Third-party Suppression Rules x
Typical Suppressions Usage Models Using Third-party Suppression Files Third-party Suppression Files
API Support x
APIs for Custom Synchronization APIs for Custom Memory Allocation APIs for Collection Control
Troubleshooting x
Troubleshooting Anti-virus Software Issues Troubleshooting Application Crashes Troubleshooting Internal Thread Suspension Attempt Troubleshooting No Problems Detected Troubleshooting No Symbolic Information Troubleshooting OpenMP* Technology Issues Troubleshooting Out-of-memory Conditions
User Interface Reference x
Context Menus: Project Navigator Context Menus: Sources Window Panes Context Menus: Summary Window Panes Dialog Box: Corresponding inspxe-cl Command Options Dialog Box: Create a Project Dialog Box: Create Suppression Dialog Box: Custom Analysis Dialog Box: Delete Suppressions Dialog Box: Export Result Dialog Box: Merge States Dialog Box: Options-Debugger Dialog Box: Options-General Dialog Box: Options-Result Location Dialog Box: Options-State Management Dialog Box: Problem Report Dialog Box: Project Properties-Binary/Symbol Search Dialog Box: Project Properties-Source Search Dialog Box: Project Properties-Suppressions Dialog Box: Project Properties-Target Dialog Box: Refine Source File Set Dialog Box: Select Stack Frame(s) Dialog Box: View Stack Hot Keys Pane: Analysis Type-Custom Pane: Analysis Type-Memory Errors Pane: Analysis Type-Threading Errors Pane: Application Output Pane: Code and Stack Pane: Code Locations Pane: Collection Log Pane: Collector Messages Pane: Compare Results Pane: Filters Pane: Import Result Pane: Launch Application Pane: Problems Pane: Project Navigator Pane: Timeline Toolbar: Command Toolbar: Intel Inspector Toolbar: Navigation Window: Collection Log Window: Compare Results Window: Import Result Window: Sources Window: Summary After Analysis Is Complete Window: Summary During Analysis
Problem Type Reference x
Asynchronous Buffer Cross-thread Stack Access Data Race Deadlock Host Pointer Used on Device Incorrect memcpy Call Invalid Deallocation Invalid Kernel Argument Invalid Kernel Argument Size Invalid Memory Access Invalid Partial Memory Access Lock Hierarchy Violation Memory Growth Memory Leak Memory Not Deallocated Mismatched Allocation/Deallocation Mismatched Queue Missing Allocation Non-Host Pointer Pointer from Different Device Thread Exit Information Thread Start Information Unhandled Application Exception Uninitialized Memory Access Uninitialized Partial Memory Access
Command Line Interface Support x
Command Syntax Command Syntax Alternatives and Rules Command Line Output Collecting Result Data from the Command Line Working with Reports from the Command Line Working with Suppressions from the Command Line inspxe-cl Actions, Options and Arguments
Working with Reports from the Command Line x
Reporting Result Data from the Command Line Saving and Formatting Reports from the Command Line Interpreting Result Data from the Command Line
Working with Suppressions from the Command Line x
Creating a Suppress-All File from the Command Line Converting Third-Party Suppression Files from the Command Line Applying Suppression Files from the Command Line Workaround for Disabled Suppressions from the Command Line
inspxe-cl Actions, Options and Arguments x
appdebug app-working-dir archive-name baseline-result collect collect-with command convert-suppression-file create-breakpoints create-suppression-file <span class='option'>csv-delimiter</span> debug-this executable-of-interest export filter finalize format help include-snippets include-sources import knob knob-list merge-states module-filter module-filter-mode no-auto-finalize no-summary option-file quiet report report-all report-output result-dir return-app-exitcode search-dir sort-asc sort-desc suppression-file user-data-dir verbose version
MPI Applications Support x
MPI Analysis Workflow Configure Installation Options Collect MPI Performance/Correctness Data Finalize MPI Collected Data View MPI Collected Data MPI Analysis Limitations Support of Non-Intel MPI Implementations Additional MPI Resources
Appendix x
Product Design Sample Code Caveats Intel Inspector Filenames and Locations Notational Conventions Related Information System APIs Supported During Memory Error Analysis System APIs Supported During Threading Error Analysis Evaluation Features
Intel® Inspector User Guide for Linux* OS

Example: Threading Problem

In this example, Intel Inspector detects a data race. This problem happens when two or more unordered threads operate the same data, which may result in incorrect data in the write location.

To locate the variable that is used as a write location, click on a problem in the results window, and Intel Inspector highlights problematic lines in source code.

If Intel Inspector reports a data race, the problem might include several call stacks and appear in several instances:

  • Call stacks from parallel threads attempt to use the same variable (for example, 'read' or 'write')
  • Optional: Call stack to variable allocation location helps to locate the name of the variable participating in the data race
  • Optional: Call stack to recommended synchronization primitive can be used to fix this problem

To root cause the problem, start with analysis of call stacks access and see why your application uses the problematic variable without synchronization. Look at the variable call stack to identify the exact variable involved into the data race condition. Sometimes it is useful to look at other instances of the problem to understand circumstances leading to that error.

To solve the data race problem from the example above, enforce threads ordering by uncommenting the #pragma omp atomic line . This is not an optimal solution for performance (use OpenMP reduction instead) but it will fix the data race.

See Also

Data Race

Parent topic: Analyze Offloaded Code
Level Two Title