Manual Pages for UNIX Operating System command usage for man smt_pause

Standard C Library Functions                        smt_pause(3C)



NAME
     smt_pause - busy wait idle function

SYNOPSIS
     #include 

     void smt_pause(void);


DESCRIPTION
     The smt_pause() function delays for a short  implementation-
     dependent  period  before returning to the caller, consuming
     as few processor resources as possible.  This  primitive  is
     recommended  for use in busy wait loops to lessen the impact
     the loop has on the rest of the system. For example, on  CMT
     systems  it  enables other hardware strands sharing the core
     to go faster during the busy wait.

USAGE
     Typical usage is as follows:

       volatile int *wait;
       while (*wait == 1)
             smt_pause();


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



     ____________________________________________________________
    |       ATTRIBUTE TYPE        |       ATTRIBUTE VALUE       |
    |_____________________________|_____________________________|
    | Interface Stability         | Committed                   |
    |_____________________________|_____________________________|
    | MT-Level                    | MT-Safe                     |
    |_____________________________|_____________________________|


SEE ALSO
     attributes(5)












SunOS 5.11          Last change: 20 Jul 2010                    1