User Guide

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

Data Transfers per Function

Key:
-u [--transfers_per_function]
This chart provides information about data transferred by each MPI function (for all ranks). This information can be useful for identifying functions most used for data transfers.

Example

| Function summary for all ranks |----------------------------------------------------------------------- |           Function       Volume(MB)        Volume(%)        Transfers |-----------------------------------------------------------------------               Reduce          1385.98          66.6665            65128                Csend          692.997          33.3335            78073            Allreduce      0.000839233      4.03675e-05              132               Gather      0.000335693       1.6147e-05               44                Bcast      0.000312805      1.50461e-05               50                 Send       3.8147e-06      1.83489e-07                1              Barrier                0                0              314 |======================================================================= | TOTAL                       2078.98              100           143742

Chart Entries

Columns
Rows
Function
Function name
Volume(MB)
Amount of data sent and received by the function (in megabytes)
Volume(%)
Percentage of amount of data sent and received by the function
Transfers
Number of function calls
TOTAL
Total values for all columns

Product and Performance Information

1

Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804