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kernel: memslab: Add maximum mem_slab utilization trace

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Add new function to mem_slab API that enables user
to get maximum number of slabs used so far.

Signed-off-by: Kamil Lazowski <Kamil.Lazowski@nordicsemi.no>
This commit is contained in:
Kamil Lazowski 2020-09-11 14:27:55 +02:00 • committed by Anas Nashif
commit 104f100749
4 changed files with 40 additions and 1 deletions
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10
kernel/mem_slab.c
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@ -88,6 +88,11 @@ int k_mem_slab_init(struct k_mem_slab *slab, void *buffer,
slab->block_size = block_size;
slab->buffer = buffer;
slab->num_used = 0U;
#ifdef CONFIG_MEM_SLAB_TRACE_MAX_UTILIZATION
slab->max_used = 0U;
#endif
rc = create_free_list(slab);
if (rc < 0) {
goto out;
@ -111,6 +116,11 @@ int k_mem_slab_alloc(struct k_mem_slab *slab, void **mem, k_timeout_t timeout)
*mem = slab->free_list;
slab->free_list = *(char **)(slab->free_list);
slab->num_used++;
#ifdef CONFIG_MEM_SLAB_TRACE_MAX_UTILIZATION
slab->max_used = MAX(slab->num_used, slab->max_used);
#endif
result = 0;
} else if (K_TIMEOUT_EQ(timeout, K_NO_WAIT)) {
/* don't wait for a free block to become available */