Manual Pages for UNIX Operating System command usage for man tnf_process_enable

TNF Library Functions                   tnf_process_disable(3TNF)



NAME
     tnf_process_disable, tnf_process_enable, tnf_thread_disable,
     tnf_thread_enable - probe control internal interface

SYNOPSIS
     cc [ flag ... ] file ... -ltnfprobe [ library ... ]
     #include 



     void tnf_process_disable(void);


     void tnf_process_enable(void);


     void tnf_thread_disable(void);


     void tnf_thread_enable(void);


DESCRIPTION
     There are three levels of granularity for controlling  trac-
     ing and probe functions (called probing from here on): prob-
     ing for the entire process, a  particular  thread,  and  the
     probe  itself  can  be  disabled  or enabled.  The first two
     (process and thread) are controlled by this interface.   The
     probe is controlled with the prex(1) utility.


     The tnf_process_disable() function turns off probing for the
     process.  The  default  process  state  is  to  have probing
     enabled. The tnf_process_enable() function turns on  probing
     for the process.


     The tnf_thread_disable() function turns off probing for  the
     currently running thread. Threads are "born" or created with
     this state enabled. The tnf_thread_enable()  function  turns
     on probing for the currently running thread.  If the program
     is a non-threaded program, these two thread interfaces  dis-
     able or enable probing for the process.

ATTRIBUTES
     See attributes(5) for descriptions of the  following  attri-
     butes:








SunOS 5.11           Last change: 5 Feb 2002                    1






TNF Library Functions                   tnf_process_disable(3TNF)



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Availability                | developer/tnf               |
    |_____________________________|_____________________________|
    | Interface Stability         | Uncommitted                 |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|


SEE ALSO
     prex(1),        tnfdump(1),        TNF_DECLARE_RECORD(3TNF),
     TNF_PROBE(3TNF), attributes(5)

NOTES
     A probe is considered enabled only if:

         o    prex(1) has enabled the probe AND

         o    the process  has  probing  enabled,  which  is  the
              default  or  could be set with tnf_process_enable()
              AND

         o    the thread that hits the probe has probing enabled,
              which  is  every  thread's  default or could be set
              with tnf_thread_enable().


     There is a run time cost associated  with  determining  that
     the probe is  disabled.  To reduce the performance effect of
     probes, this cost should be  minimized.   The  quickest  way
     that  a  probe  can  be determined to be disabled is  by the
     enable control that prex(1) uses.  Therefore, to disable all
     the  probes  in a process use the disable command in prex(1)
     rather than tnf_process_disable().


     The tnf_process_disable() and tnf_process_enable() functions
     should only be used to toggle probing based on some internal
     program condition. The tnf_thread_disable() function  should
     be used to turn off probing for threads that are uninterest-
     ing.












SunOS 5.11           Last change: 5 Feb 2002                    2