linux-kernel - [PATCH v3 03/66] radix tree test suite: Add allocation counts and size to kmem

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Date:   Tue, 5 Oct 2021 01:30:26 +0000
From:   Liam Howlett <liam.howlett@...cle.com>
To:     "maple-tree@...ts.infradead.org" <maple-tree@...ts.infradead.org>,
        "linux-mm@...ck.org" <linux-mm@...ck.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        David Hildenbrand <david@...hat.com>,
        Douglas Gilbert <dgilbert@...erlog.com>
CC:     Song Liu <songliubraving@...com>,
        Davidlohr Bueso <dave@...olabs.net>,
        "Paul E . McKenney" <paulmck@...nel.org>,
        Matthew Wilcox <willy@...radead.org>,
        David Rientjes <rientjes@...gle.com>,
        Axel Rasmussen <axelrasmussen@...gle.com>,
        Suren Baghdasaryan <surenb@...gle.com>,
        Vlastimil Babka <vbabka@...e.cz>,
        Rik van Riel <riel@...riel.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: [PATCH v3 03/66] radix tree test suite: Add allocation counts and
 size to kmem_cache

From: "Liam R. Howlett" <Liam.Howlett@...cle.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@...cle.com>
---
 tools/testing/radix-tree/linux.c | 27 +++++++++++++++++++++++++++
 1 file changed, 27 insertions(+)

diff --git a/tools/testing/radix-tree/linux.c b/tools/testing/radix-tree/linux.c
index 00ee01a14652..f95e71d65f00 100644
--- a/tools/testing/radix-tree/linux.c
+++ b/tools/testing/radix-tree/linux.c
@@ -25,6 +25,8 @@ 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)
@@ -32,6 +34,26 @@ 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(struct kmem_cache *cachep, int gfp)
 {
 	void *p;
@@ -63,7 +85,9 @@ void *kmem_cache_alloc(struct kmem_cache *cachep, int gfp)
 			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;
@@ -73,6 +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);
@@ -124,6 +149,8 @@ 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;
-- 
2.30.2