pr_set_tsc(2const) - BetterMan

pr_set_tsc(2const)

change whether the timestamp counter can be read by the process

distropkg manpages-dev@6.9.1-1dataset 2026-04-01T06:19:02Z+debian+ec4110e+mandoc:1.14.6-4

Synopsis

#include <linux/prctl.h>
  /* Definition of 
PR_*
 constants */
#include <sys/prctl.h>
int prctl(PR_SET_TSC, long 
flag
);

—

Options · 1

EINVAL

arg2 is not a valid value.

NAME

PR_SET_TSC - change whether the timestamp counter can be read by the process

SYNOPSIS

bash

#include <linux/prctl.h>\n  /* Definition of \nPR_*\n constants */
\n#include <sys/prctl.h>

bash

int prctl(PR_SET_TSC, long \nflag\n);

Set the state of the flag determining whether the timestamp counter can be read by the process. Pass PR_TSC_ENABLE to flag to allow it to be read, or PR_TSC_SIGSEGV to generate a SIGSEGV when the process tries to read the timestamp counter.

RETURN VALUE

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

ERRORS

EINVAL: arg2 is not a valid value.

STANDARDS

Linux. x86 only.

HISTORY

Linux 2.6.26 (x86).