---
name: "PAPI_reset"
section: "3"
platform: "linux"
package: "libpapi-dev"
version: "7.1.0-5+b1"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/PAPI_reset"
---

# PAPI\_reset(3)

Reset the hardware event counts in an event set.

## NAME

PAPI\_reset - Reset the hardware event counts in an event set.

## SYNOPSIS

## Detailed Description

**C Prototype:**

\#include \<**papi.h**\> \
\
  int **PAPI\_reset( int EventSet )**;

**Parameters**

*EventSet* an integer handle for a PAPI event set as created by **PAPI\_create\_eventset**

**Return values**

*PAPI\_OK* \
 *PAPI\_ESYS* A system or C library call failed inside PAPI, see the errno variable. \
 *PAPI\_ENOEVST* The EventSet specified does not exist.

**PAPI\_reset()** zeroes the values of the counters contained in EventSet. This call assumes an initialized PAPI library and a properly added event set

**Example:**

```
int EventSet = PAPI_NULL;
int Events[] = {PAPI_TOT_INS, PAPI_FP_OPS};
int ret;
// Create an empty EventSet
ret = PAPI_create_eventset(&EventSet);
if (ret != PAPI_OK) handle_error(ret);
// Add two events to our EventSet
ret = PAPI_add_events(EventSet, Events, 2);
if (ret != PAPI_OK) handle_error(ret);
// Start counting
ret = PAPI_start(EventSet);
if (ret != PAPI_OK) handle_error(ret);
// Stop counting, ignore values
ret = PAPI_stop(EventSet, NULL);
if (ret != PAPI_OK) handle_error(ret);
// reset the counters in this EventSet
ret = PAPI_reset(EventSet);
if (ret != PAPI_OK) handle_error(ret);
```

**See also**

**PAPI\_create\_eventset**

## Author

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