Application Performance Snapshot User Guide for Linux* OS

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ID 772048
Date 3/31/2023
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Document Table of Contents
Document Table of Contents x
Application Performance Snapshot User's Guide for Linux* OS
Application Performance Snapshot User's Guide for Linux* OS x
Introducing Application Performance Snapshot Analyzing Applications Detailed Analyses Metrics Reference Known Issues and Limitations Notices and Disclaimers
Analyzing Applications x
Controlling Amount of Collected Data
Detailed Analyses x
Common Analyses MPI Analyses Outlier Detection
MPI Analyses x
Analysis Charts Filtering Capabilities Region Control with MPI_Pcontrol Creating Configuration File for Intel® Trace Collector
Analysis Charts x
Function Summary for All Ranks MPI Time per Rank Message Sizes Summary for All Ranks Data Transfers per Rank-to-Rank Communication Data Transfers per Rank Data Transfers per Function Node-to-Node Data Transfers Communicator List Detailed Information for Specific Ranks
Filtering Capabilities x
Filtering by Key Metric Filtering by Number of Lines Using Filter Combinations
Application Performance Snapshot User's Guide for Linux* OS

Known Issues and Limitations

Below is a list of known issues and limitations related to Application Performance Snapshot:

  • The HTML summary report may be rendered incorrectly with older browser versions. For correct rendering, please update to the latest version of your browser.
  • If you view the HTML report on Windows* OS from a shared drive, use any web browser other than Internet Explorer*.
  • If you use an unsupported compiler or compiler version, the OpenMP* related metrics will be unavailable.
  • Limitations related to collection of disk usage statistics:
    • To collect the statistics, Application Performance Snapshot uses data provided by the OS. Wait time or idle time caused by waiting data from the I/O subsystem is measured with relatively low precision. This is why for short tasks I/O wait time may equal zero, even in case the I/O subsystem is actively used.
    • During a process run, if the system reassigns it to a different CPU core, the data read/written and I/O wait time will equal zero.
  • Limitations related to MPI support:
    • The MPI_THREAD_MULTIPLE mode is not supported.
    • Application Performance Snapshot is incompatible with the Intel® Trace Collector. Avoid analyzing MPI applications with both tools simultaneously.
    • Application Performance Snapshot does not fully support neighborhood collective communications. It registers only their execution times, without information about data transmitted and its direction.
    • Disk Usage and Memory Footprint metrics are not available for MPI_Pcontrol region statistics.
Parent topic: Application Performance Snapshot User's Guide for Linux* OS
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