freebsd man page for optisa

optisa(1)							   User Commands							 optisa(1)

NAME

       optisa - determine which variant instruction set is optimal to use

SYNOPSIS

       optisa instruction_set...

DESCRIPTION

       optisa  prints  which  instruction_set out of the ones specified in the command will perform best on  this machine.  In this case, ``best''
       is defined by the order	in which instruction set names are returned by	isalist(1). Possible  values  for  instruction_set  are  given	in
       isalist(5).

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       +-----------------------------+-----------------------------+
       |Availability		     |SUNWcsu			   |
       +-----------------------------+-----------------------------+

EXIT STATUS

       The following exit values are returned:

       0	One of the  instruction_set values you specified is printed by this command.

       1	There is no output; that is, this machine cannot use any  instruction_set that you specified with the optisa command.

SEE ALSO

       isalist(1), uname(1), attributes(5), isalist(5)

NOTES

       optisa is preferable to	uname -p or  uname -m (see uname(1)) in determining which of several binary versions of a given program  should be
       used on the given machine.

SunOS 5.10							    25 Jul 1997 							 optisa(1)