PR_SET_TSC(2const)

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

LIBRARY
Standard C library (libc, -lc)

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

int prctl(PR_SET_TSC, long flag);

DESCRIPTION
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
    flag is not a valid value.

STANDARDS
Linux. x86 only.

HISTORY
Linux 2.6.26 (x86).

SEE ALSO
prctl(2), PR_GET_TSC(2const)