[petsc-dev] About PreLoad

Ryan Yan vyan2000 at gmail.com
Thu Jun 30 17:47:15 CDT 2011

Dear All,
I am using a developer version of  PETSc code to test a solver code.

The code loads a matrix, and solves the matrix by method
A first and then method B. In each method of A and B, I setup KSP, solve,
and then destroy KSP. So in this process, I set up KSP twice and destroy
the KSP object twice.

I am using the PreLoadxxx to do the profiling but seems like part of the
profiling information is missing.

PreLoadBegin(PETSC_TRUE, "A"),
PreLoadStage((PETSC_TRUE, "B"),

The missing part is:

Event                Count      Time (sec)
Flops                             --- Global ---  --- Stage ---   Total
                   Max Ratio  Max     Ratio   Max  Ratio  Mess   Avg len
Reduct  %T %F %M %L %R  %T %F %M %L %R Mflop/s

--- Event Stage 0: Main Stage

--- Event Stage 1: A

--- Event Stage 2: B


Is there any way to workaround this?

Many thanks,

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