# PetscGetCPUTime

Returns the CPU time in seconds used by the process.

### Synopsis

    #include "petsc.h"
    PetscErrorCode PETSC_DLLEXPORT PetscGetCPUTime(PetscLogDouble *t)

Not Collective

### Output Parameter

t -Time in seconds charged to the process.

### Example

        #include "petsc.h"
        ...
        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);

### Notes

One should use PetscGetTime() or the -log_summary 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.

Level:intermediate
Location:src/sys/time/cputime.c
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