Commit 5c5e17f0 authored by Adrian Warecki's avatar Adrian Warecki Committed by Chris Friedt
Browse files

kernel: dynamic: Optimize stack pool usage 



Add the flags parameter to the z_thread_stack_alloc_pool function.
Determine the maximum possible stack size based on the size of the reserved
memory for stack and the thread type (flags).

The stack size that can be used by a thread depend on its type
(kerner/user). For the same stack size, the macros K_KERNEL_STACK_DECLARE
and K_THREAD_STACK_DEFINE may reserve different amount of memory.

Signed-off-by: default avatarAdrian Warecki <adrian.warecki@intel.com>
parent 18497c57

kernel/dynamic.c

+7 −6
Original line number Diff line number Diff line
@@ -31,15 +31,16 @@ static K_THREAD_STACK_ARRAY_DEFINE(dynamic_stack, CONFIG_DYNAMIC_THREAD_POOL_SIZ 
				   CONFIG_DYNAMIC_THREAD_STACK_SIZE);

SYS_BITARRAY_DEFINE_STATIC(dynamic_ba, BA_SIZE);



static k_thread_stack_t *z_thread_stack_alloc_pool(size_t size)

static k_thread_stack_t *z_thread_stack_alloc_pool(size_t size, int flags)

{

	int rv;

	size_t offset;

	k_thread_stack_t *stack;

	const size_t max_size = ((flags & K_USER) != 0) ? K_THREAD_STACK_SIZEOF(dynamic_stack[0]) :

							  K_KERNEL_STACK_SIZEOF(dynamic_stack[0]);



	if (size > CONFIG_DYNAMIC_THREAD_STACK_SIZE) {

		LOG_DBG("stack size %zu is > pool stack size %d", size,

			CONFIG_DYNAMIC_THREAD_STACK_SIZE);

	if (size > max_size) {

		LOG_DBG("stack size %zu is > pool stack size %zu", size, max_size);

		return NULL;

	}
@@ -79,11 +80,11 @@ k_thread_stack_t *z_impl_k_thread_stack_alloc(size_t size, int flags) 
	if (IS_ENABLED(CONFIG_DYNAMIC_THREAD_PREFER_ALLOC)) {

		stack = z_thread_stack_alloc_dyn(size, flags);

		if (stack == NULL && CONFIG_DYNAMIC_THREAD_POOL_SIZE > 0) {

			stack = z_thread_stack_alloc_pool(size);

			stack = z_thread_stack_alloc_pool(size, flags);

		}

	} else if (IS_ENABLED(CONFIG_DYNAMIC_THREAD_PREFER_POOL)) {

		if (CONFIG_DYNAMIC_THREAD_POOL_SIZE > 0) {

			stack = z_thread_stack_alloc_pool(size);

			stack = z_thread_stack_alloc_pool(size, flags);

		}



		if ((stack == NULL) && IS_ENABLED(CONFIG_DYNAMIC_THREAD_ALLOC)) {

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