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PR_SET_TSC(2const) — Linux manual page

NAME | LIBRARY | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | STANDARDS | HISTORY | SEE ALSO | COLOPHON 

PR_SET_TSC(2const)                                    PR_SET_TSC(2const)

NAME         top

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

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

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

       int prctl(PR_SET_TSC, long flag);

DESCRIPTION         top

       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         top

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

ERRORS         top

       EINVAL arg2 is not a valid value.

STANDARDS         top

       Linux.  x86 only.

HISTORY         top

       Linux 2.6.26 (x86).

SEE ALSO         top

       prctl(2), PR_GET_TSC(2const)

COLOPHON         top

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Linux man-pages 6.9.1          2024-06-02             PR_SET_TSC(2const)

Pages that refer to this page: prctl(2),  PR_GET_TSC(2const)

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