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OpenSolaris 2009.06 - man page for optisa (opensolaris section 1)

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 5.11 25 Jul 1997 optisa(1)