In order to use memory classes in C programs, you must include
the header file /usr/include/spp_prog_model.h.
Memory classes are described in the Parallel Programming
Guide for HP-UX Systems.
In C, the general form for assigning memory is:
#include <spp_prog_model.h>
.
. .
[storage_class_specfier]
memory_class_name type_specifier
namelist
where:
- storage_class_specifier
specifies a non-automatic storage class
- memory_class_name
is thread_private
or node_private
- type_specifier
is a data type (for example, int
or float)
- namelist
is a comma-seperated list of variables and/or
arrays of type type_specifier
Data objects that are assigned a memory class must have a
static storage duration. If the object is declared within a function,
it must have the storage class extern
or static. Data objects declared
at file scope and assigned a memory class need not specify a storage
class.
A hypernode is a set of processors and physical memory organized
as a symmetric multiprocessor (SMP) running a single image of the
operating system microkernel.
node_private |
 |
This storage class specifier causes the variables and arrays
specified in namelist to be replicated
in the physical memory of each hypernode on which the process is
executing. While each data object has a single image in virtual
memory, it maps to a different physical location on each hypernode.
The threads of a process within a hypernode all share access to
the copy on their hypernode and cannot access the copies on other
hypernodes.
thread_private |
|
This storage class specifier causes the variables and arrays
to be treated as thread_private.
These data objects map to unique node_private
addresses for each thread of a process. Refer to the Parallel
Programming Guide for HP-UX Systems for more information.
