Intel® Inspector User Guide for Linux* OS

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ID 767796
Date 5/15/2022
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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
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 Possible Correction Strategies 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

Invalid Kernel Argument Size

Occurs when the size of kernel argument exceeds the amount of registers available for argument storage.

ID

Code Location

Description

1

Allocation site

Represents source location of passing arguments from host to a kernel.

By default, kernel arguments are promoted to registers if possible. On each device, the amount of registers available for kernel arguments may vary (usually 25-50%). The arguments outside this limit are cut off, which results in logical errors in the kernel.

In OpenCL™, arguments are specified directly using the clSetKernelArg function. In this case, the problem is more obvious and may appear if a large amount of arguments or wide structures is used.

In Data Parallel (DPC++), arguments may be specified implicitly using lambda capture list. If the list is specified as [=] or as [&], all used arguments are captured. In this case, a large amount of arguments, wide structures or classes may be passed to a kernel accidentally.

In this diagnostic, Intel® Inspector displays the total size kernel arguments (in bytes) vs the device limit.

DPC++ Example

const int N = 1000; 

struct Data 

{ 

   double numbers[N]; 

}; 

Data data; 

queue.submit([&](cl::sycl::handler &cgh) 

{ 

   cgh.parallel_for<class my_task>(cl::sycl::range<1> { N }, [=](cl::sycl::id<1> idx) 

   { 

       deviceData[0] += data.numbers[idx];  // Implicit usage of Data structure from host 

   }); 

}); 

queue.wait(); 

// The structure contains 1000 doubles x 8 bytes = 8000 bytes of data > available kernel arguments limit.

Possible Correction Strategies

To avoid the problem, use the following hints:

  • Reduce the number of arguments used if possible.
  • Avoid passing complex structures to a kernel. Consider passing separate fields instead of a complete data structure.
  • Narrow the type of data. Consider using float instead of double, int instead of long, etc.
  • In a DPC++ program, specify lambda capture list explicitly instead of using a default capture list specified by [=] or [&].

CAUTION:

Sample Code Caveats

Parent topic: Problem Type Reference
Level Two Title