Returns the CPU time in seconds used by the process.
PetscErrorCode PetscGetCPUTime(PetscLogDouble *t)
t -Time in seconds charged to the process.
PetscLogDouble t1, t2;
ierr = PetscGetCPUTime(&t1);CHKERRQ(ierr);
... code to time ...
ierr = PetscGetCPUTime(&t2);CHKERRQ(ierr);
printf("Code took %f CPU seconds\n", t2-t1);
One should use PetscTime() or the -log_view option of
PETSc for profiling. The CPU time is NOT a realistic number to
use since it does not include the time for message passing etc.
Also on many systems the accuracy is only on the order of microseconds.
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