• 9.1
  • 07/08/2015
  • Public Content

Detect Serialization in Function Profile and Message Profile


 Analyze your application with several charts opened at the same time.
In the Function Profile chart, open the
Load Balance
tab.
Go to the
Charts
menu to open a Message Profile.
Many Charts
In the Load Balance tab, expand
MPI_Sendrecv
and
MPI_Allreduce
. The Load Balancing indicates that the time spent in
MPI_Sendrecv
increases with the process number, while the time for
MPI_Allreduce
decreases.
Examine the Message Profile Chart down to the lower right corner. The color coding of the blocks indicates that messages travelling from a higher rank to a lower rank need proportionally more time while the messages travelling from a lower rank to a higher rank reveal a weak even-odd kind of pattern.
Key Terms

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