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 arg2 is not a valid value.

STANDARDS

       Linux.  x86 only.

HISTORY

       Linux 2.6.26 (x86).

SEE ALSO

       prctl(2), PR_GET_TSC(2const)