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:
-
All MPICH-based MPI implementations are supported, including Intel®
MPI Library. MPI imbalance information is available only with the
Intel MPI Library. OpenMPI* is not supported.
-
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.