# PetscLogEventActivate
Indicates that a particular event should be logged. 
## Synopsis
```
#include "petscsys.h"   
PetscErrorCode PetscLogEventActivate(PetscLogEvent event)
```
Not Collective


## Input Parameter

- ***event -*** The event id



## Usage
```none
      PetscLogEventDeactivate(VEC_SetValues);
        [code where you do not want to log VecSetValues()]
      PetscLogEventActivate(VEC_SetValues);
        [code where you do want to log VecSetValues()]
```





## Note
The event may be either a pre-defined PETSc event (found in include/petsclog.h)
or an event number obtained with `PetscLogEventRegister()`.


## See Also
 [](ch_profiling), `PlogEventDeactivate()`, `PlogEventDeactivatePush()`, `PetscLogEventDeactivatePop()`

## Level
advanced

## Location
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/logging/plog.c.html#PetscLogEventActivate">src/sys/logging/plog.c</A>

## Examples
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/tutorials/ex3.c.html">src/sys/tutorials/ex3.c.html</A><BR>
<A HREF="PETSC_DOC_OUT_ROOT_PLACEHOLDER/src/sys/tutorials/ex3f.F90.html">src/sys/tutorials/ex3f.F90.html</A><BR>


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[Edit on GitLab](https://gitlab.com/petsc/petsc/-/edit/release/src/sys/logging/plog.c)


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