# PreLoadBegin

Begin a segment of code that may be preloaded (run twice) to get accurate timings

### Input Parameter

| flag | - PETSC_TRUE to run twice, PETSC_FALSE to run once, may be overridden with command line option -preload true or -preload false
| name | - name of first stage (lines of code timed seperately with -log_summary) to be preloaded

### Synopsis

    void PreLoadBegin(PetscTruth flag,char *name);

### Usage

         PreLoadBegin(PETSC_TRUE,"first stage);
           lines of code
           PreLoadStage("second stage");
           lines of code
         PreLoadEnd();

### See Also

PetscLogEventRegister(), PetscLogEventBegin(), PetscLogEventEnd(), PreLoadEnd(), PreLoadStage()

Level:intermediate
Location: src/sys/src/plog/plog.c
Index of all Profiling routines
Table of Contents for all manual pages
Index of all manual pages

### Examples

src/mat/examples/tutorials/ex1.c.html
src/ksp/examples/tutorials/ex10.c.html
src/ksp/examples/tutorials/ex27.c.html
src/snes/examples/tutorials/ex18.c.html
src/snes/examples/tutorials/ex19.c.html
src/snes/examples/tutorials/ex20.c.html
src/snes/examples/tutorials/ex25.c.html
src/snes/examples/tutorials/ex27.c.html
src/snes/examples/tutorials/ex29.c.html
src/snes/examples/tutorials/ex30.c.html