---
name: "PR_GET_TSC"
section: "2const"
platform: "linux"
package: "man-pages"
version: "6.19-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/PR_GET_TSC"
---

# PR\_GET\_TSC(2const)

get wether the timestamp counter can be read

## NAME

PR\_GET\_TSC - get wether the timestamp counter can be read

## LIBRARY

Standard C library (*libc*, *-lc*)

## SYNOPSIS

```
#include <linux/prctl.h>  /* Definition of PR_* constants */
#include <sys/prctl.h>
```

**int prctl(PR\_GET\_TSC, int \****flag***);**

## DESCRIPTION

Return the state of the flag determining whether the timestamp counter can be read, in the location pointed to by *flag*.

## RETURN VALUE

On success, 0 is returned. On error, -1 is returned, and *errno* is set to indicate the error.

## ERRORS

- **EFAULT**

  *flag* is an invalid address.

## STANDARDS

Linux. x86 only.

## HISTORY

Linux 2.6.26 (x86).

## SEE ALSO

[**prctl**(2)](/prctl/2.md), [**PR\_SET\_TSC**(2const)](/PR_SET_TSC/2const.md)