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pthread_default_rsestacksize_np(3t) [hpux man page]

pthread_default_rsestacksize_np(3T)									       pthread_default_rsestacksize_np(3T)

NAME
pthread_default_rsestacksize_np() - change the default stacksize. SYNOPSIS
PARAMETERS
new_size The new default register stack size. old_size Pointer to where the old default register stack size is returned. DESCRIPTION
The function allows an application to change the default value for the rsestacksize attribute. This function must be called before any threads have been created. The new default stack size is passed in the new_size parameter. If not NULL, the previous default stack size is returned in old_size. If new_size is zero, this function can be used (at any time) to query the current default stack size. On HP-UX, threads with default stack sizes are cached after they terminate. The next time a thread is created with a default stack size, a cached thread (and its stack) are reused. This can result in significant performance improvements for However, if the default register stack size is not appropriate for an application, it cannot take advantage of this performance enhance- ment. By using the function, the threads library will change the default stack size so that it matches the applications needs. This allows the application to utilize the performance benefit of cached threads. If either of the set register stack size APIs is called the register stack portion of the stack space will be that large instead of size determined by the implementation. The memory stack portion will be the remainder. RETURN VALUE
Upon successful completion, returns zero. Otherwise, an error number is returned to indicate the error (the variable is not set). ERRORS
If any of the following occur, the function returns the corresponding error number: The value specified by new_size is less than register stack required for a thread. The calling process has already created threads (this must be called before any threads are created). AUTHOR
was developed by HP. SEE ALSO
pthread_attr_getstacksize(3T), pthread_attr_setstacksize(3T), pthread_default_stacksize_np(3T). STANDARDS CONFORMANCE
Pthread Library pthread_default_rsestacksize_np(3T)

Check Out this Related Man Page

PTHREAD_ATTR_SETSTACKSIZE(3)				     Linux Programmer's Manual				      PTHREAD_ATTR_SETSTACKSIZE(3)

NAME
pthread_attr_setstacksize, pthread_attr_getstacksize - set/get stack size attribute in thread attributes object SYNOPSIS
#include <pthread.h> int pthread_attr_setstacksize(pthread_attr_t *attr, size_t stacksize); int pthread_attr_getstacksize(pthread_attr_t *attr, size_t *stacksize); Compile and link with -pthread. DESCRIPTION
The pthread_attr_setstacksize() function sets the stack size attribute of the thread attributes object referred to by attr to the value specified in stacksize. The stack size attribute determines the minimum size (in bytes) that will be allocated for threads created using the thread attributes object attr. The pthread_attr_getstacksize() function returns the stack size attribute of the thread attributes object referred to by attr in the buffer pointed to by stacksize. RETURN VALUE
On success, these functions return 0; on error, they return a nonzero error number. ERRORS
pthread_attr_setstacksize() can fail with the following error: EINVAL The stack size is less than PTHREAD_STACK_MIN (16384) bytes. On some systems, pthread_attr_setstacksize() can fail with the error EINVAL if stacksize is not a multiple of the system page size. VERSIONS
These functions are provided by glibc since version 2.1. CONFORMING TO
POSIX.1-2001. NOTES
For details on the default stack size of new threads, see pthread_create(3). A thread's stack size is fixed at the time of thread creation. Only the main thread can dynamically grow its stack. The pthread_attr_setstack(3) function allows an application to set both the size and location of a caller-allocated stack that is to be used by a thread. BUGS
As at glibc 2.8, if the specified stacksize is not a multiple of STACK_ALIGN (16 bytes on most architectures), it may be rounded downward, in violation of POSIX.1-2001, which says that the allocated stack will be at least stacksize bytes. EXAMPLE
See pthread_create(3). SEE ALSO
getrlimit(2), pthread_attr_init(3), pthread_attr_setguardsize(3), pthread_attr_setstack(3), pthread_create(3), pthreads(7) COLOPHON
This page is part of release 3.53 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/. Linux 2012-03-15 PTHREAD_ATTR_SETSTACKSIZE(3)
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