radix tree test suite: add allocation counts and size to kmem_cache

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/20220906194824.2110408-5-Liam.Howlett@oracle.com
Signed-off-by: Liam R. Howlett <Liam.Howlett@Oracle.com>
Tested-by: Yu Zhao <yuzhao@google.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: David Hildenbrand <david@redhat.com>
Cc: David Howells <dhowells@redhat.com>
Cc: Davidlohr Bueso <dave@stgolabs.net>
Cc: "Matthew Wilcox (Oracle)" <willy@infradead.org>
Cc: SeongJae Park <sj@kernel.org>
Cc: Sven Schnelle <svens@linux.ibm.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Will Deacon <will@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

diff --git a/tools/testing/radix-tree/linux.c b/tools/testing/radix-tree/linux.c
index 277aa8b..f20529a 100644 (file)
--- 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;