From: "Liam R. Howlett" <Liam.Howlett@xxxxxxxxxx> Add functions to get the number of allocations, and total allocations from a kmem_cache. Also add a function to get the allocated size and a way to zero the total allocations. Link: https://lkml.kernel.org/r/20220504010716.661115-6-Liam.Howlett@xxxxxxxxxx Signed-off-by: Liam R. Howlett <Liam.Howlett@xxxxxxxxxx> Cc: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: David Howells <dhowells@xxxxxxxxxx> Cc: "Matthew Wilcox (Oracle)" <willy@xxxxxxxxxxxxx> Cc: SeongJae Park <sj@xxxxxxxxxx> Cc: Vlastimil Babka <vbabka@xxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Cc: Davidlohr Bueso <dave@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- tools/testing/radix-tree/linux.c | 28 +++++++++++++++++++++++++++- 1 file changed, 27 insertions(+), 1 deletion(-) diff --git a/tools/testing/radix-tree/linux.c b/tools/testing/radix-tree/linux.c index 277aa8b70abc..f20529ae4dbe 100644 --- a/tools/testing/radix-tree/linux.c +++ b/tools/testing/radix-tree/linux.c @@ -24,6 +24,8 @@ struct kmem_cache { void *objs; void (*ctor)(void *); unsigned int non_kernel; + unsigned long nr_allocated; + unsigned long nr_tallocated; }; void kmem_cache_set_non_kernel(struct kmem_cache *cachep, unsigned int val) @@ -31,9 +33,28 @@ void kmem_cache_set_non_kernel(struct kmem_cache *cachep, unsigned int val) cachep->non_kernel = val; } +unsigned long kmem_cache_get_alloc(struct kmem_cache *cachep) +{ + return cachep->size * cachep->nr_allocated; +} + +unsigned long kmem_cache_nr_allocated(struct kmem_cache *cachep) +{ + return cachep->nr_allocated; +} + +unsigned long kmem_cache_nr_tallocated(struct kmem_cache *cachep) +{ + return cachep->nr_tallocated; +} + +void kmem_cache_zero_nr_tallocated(struct kmem_cache *cachep) +{ + cachep->nr_tallocated = 0; +} + void *kmem_cache_alloc_lru(struct kmem_cache *cachep, struct list_lru *lru, int gfp) - { void *p; @@ -64,7 +85,9 @@ void *kmem_cache_alloc_lru(struct kmem_cache *cachep, struct list_lru *lru, memset(p, 0, cachep->size); } + uatomic_inc(&cachep->nr_allocated); uatomic_inc(&nr_allocated); + uatomic_inc(&cachep->nr_tallocated); if (kmalloc_verbose) printf("Allocating %p from slab\n", p); return p; @@ -74,6 +97,7 @@ void kmem_cache_free(struct kmem_cache *cachep, void *objp) { assert(objp); uatomic_dec(&nr_allocated); + uatomic_dec(&cachep->nr_allocated); if (kmalloc_verbose) printf("Freeing %p to slab\n", objp); pthread_mutex_lock(&cachep->lock); @@ -99,6 +123,8 @@ kmem_cache_create(const char *name, unsigned int size, unsigned int align, ret->size = size; ret->align = align; ret->nr_objs = 0; + ret->nr_allocated = 0; + ret->nr_tallocated = 0; ret->objs = NULL; ret->ctor = ctor; ret->non_kernel = 0; -- 2.35.1
