User Guide

  • 2020 Update 2
  • 07/28/2020
  • Public Content

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.

Product and Performance Information

1

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