uwx_self_init_state_cache(3X)											     uwx_self_init_state_cache(3X)

NAME

       uwx_self_init_state_cache() - create a cache to improve self-unwind performance

SYNOPSIS


DESCRIPTION

       is  part of the Unwind Express Library for Integrity systems; see uwx(3X).  creates a cache for quick retrieval of unwind state information
       when self-unwinding.  This routine can be used to improve the performance of programs that perform frequent self-unwind operations.

       The ideal cache size and associativity will vary for different applications.  Experiment with different values and use performance measure-
       ment tools to determine the best values to use.

       The memory used by the cache is freed when is called.

   Parameters
       info	      A pointer to the callback info structure created by

       rows	      The  number  of rows in the cache.  If this is not a power of two, it will be adjusted to the largest power of two less than
		      the value specified.  If the value specified is less than 1, returns without allocating a cache.

       assoc	      The associativity of the cache.  This determines how many entries with conflicting hash values can be stored in each row	of
		      the cache.  If the value specified is less than 1, returns without allocating a cache.

       entsz	      The  size of a cache entry in bytes.  The size of the unwind state information stored in a cache entry varies between 64 and
		      368 bytes.

		      If a stack frame's unwind state is larger than the value specified for entsz, the state will not be saved in the cache.	An
		      entry  size  of 104 is sufficient for most stack frames.	If the entsz value is not a multiple of 8 bytes it will be rounded
		      up.  If value specified is less than 64 bytes, returns without allocating a cache.

RETURN VALUE

       returns on success.  See uwx(3X) for error codes.

AUTHOR

       The Unwind Express Library was developed by Hewlett-Packard.

SEE ALSO

       uwx(3X),  uwx_add_to_bsp(3X),  uwx_find_source_info(3X),  uwx_find_symbol(3X),  uwx_free(3X),  uwx_get_abi_context_code(3X),  uwx_get_func-
       start(3X),   uwx_get_module_info(3X),   uwx_get_nat(3X),   uwx_get_reg(3X),  uwx_get_source_info(3X),  uwx_get_sym_info(3X),  uwx_init(3X),
       uwx_init_context(3X), uwx_register_alloc_cb(3X), uwx_register_callbacks(3X),  uwx_release_symbol_cache(3X),  uwx_self_do_context_frame(3X),
       uwx_self_free_info(3X),	  uwx_self_init_context(3X),	uwx_self_init_info(3X),    uwx_set_nofr(3X),   uwx_set_remote(3X),   uwx_step(3X),
       uwx_step_inline(3X).

							      Integrity Systems Only				     uwx_self_init_state_cache(3X)