[PATCH v13 04/70] radix tree test suite: add allocation counts and size to kmem_cache

Liam Howlett
2022-08-22T15:03:18Z

From: "Liam R. Howlett" <Liam.Howlett@Oracle.com>

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.

Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
---
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