• 9.1
  • 08/07/2015
  • Public Content

Remove Serialization


You can improve the performance of the
poisson
sample program by replacing the blocking
MPI_Sendrecv
with non-blocking communications via
MPI_Isend
. The modified source file
pardat.f90_icomm
is available in the source folder. The trace file of the modified program is also available:
<install-dir>/examples/traces/poisson_icomm.single.stf
.
Once corrected, the single iteration of the revised program will look similar to this:
Since
poisson_sendrecv.single.stf
is a striking example of serialization, almost all of the Intel® Trace Analyzer charts show this interesting pattern. But in the real-world cases, it may be necessary to formulate a hypothesis regarding how the program should behave and to check this hypothesis using the most suitable chart.
Key Terms

Product and Performance Information

1

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