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-rw-r--r--libglusterfs/src/glusterfs/xlator.h2
-rw-r--r--libglusterfs/src/libglusterfs.sym1
-rw-r--r--libglusterfs/src/mem-pool.c193
-rw-r--r--libglusterfs/src/xlator.c23
4 files changed, 105 insertions, 114 deletions
diff --git a/libglusterfs/src/glusterfs/xlator.h b/libglusterfs/src/glusterfs/xlator.h
index 90396f93431..b7d0249c9c8 100644
--- a/libglusterfs/src/glusterfs/xlator.h
+++ b/libglusterfs/src/glusterfs/xlator.h
@@ -1035,6 +1035,8 @@ gf_boolean_t
loc_is_nameless(loc_t *loc);
int
xlator_mem_acct_init(xlator_t *xl, int num_types);
+void
+xlator_mem_acct_unref(struct mem_acct *mem_acct);
int
is_gf_log_command(xlator_t *trans, const char *name, char *value, size_t size);
int
diff --git a/libglusterfs/src/libglusterfs.sym b/libglusterfs/src/libglusterfs.sym
index 0fdb62c810f..d5413f41c89 100644
--- a/libglusterfs/src/libglusterfs.sym
+++ b/libglusterfs/src/libglusterfs.sym
@@ -1097,6 +1097,7 @@ xlator_foreach
xlator_foreach_depth_first
xlator_init
xlator_mem_acct_init
+xlator_mem_acct_unref
xlator_notify
xlator_option_info_list
xlator_option_init_bool
diff --git a/libglusterfs/src/mem-pool.c b/libglusterfs/src/mem-pool.c
index 92f78ee952b..d717e9ffab9 100644
--- a/libglusterfs/src/mem-pool.c
+++ b/libglusterfs/src/mem-pool.c
@@ -35,61 +35,92 @@ gf_mem_acct_enable_set(void *data)
return;
}
-int
-gf_mem_set_acct_info(xlator_t *xl, char **alloc_ptr, size_t size, uint32_t type,
- const char *typestr)
+static void *
+gf_mem_header_prepare(struct mem_header *header, size_t size)
{
- void *ptr = NULL;
- struct mem_header *header = NULL;
+ void *ptr;
- if (!alloc_ptr)
- return -1;
+ header->size = size;
- ptr = *alloc_ptr;
+ ptr = header + 1;
- GF_ASSERT(xl != NULL);
+ /* data follows in this gap of 'size' bytes */
+ *(uint32_t *)(ptr + size) = GF_MEM_TRAILER_MAGIC;
- GF_ASSERT(xl->mem_acct != NULL);
+ return ptr;
+}
- GF_ASSERT(type <= xl->mem_acct->num_types);
+static void *
+gf_mem_set_acct_info(struct mem_acct *mem_acct, struct mem_header *header,
+ size_t size, uint32_t type, const char *typestr)
+{
+ struct mem_acct_rec *rec = NULL;
+ bool new_ref = false;
- LOCK(&xl->mem_acct->rec[type].lock);
- {
- if (!xl->mem_acct->rec[type].typestr)
- xl->mem_acct->rec[type].typestr = typestr;
- xl->mem_acct->rec[type].size += size;
- xl->mem_acct->rec[type].num_allocs++;
- xl->mem_acct->rec[type].total_allocs++;
- xl->mem_acct->rec[type].max_size = max(xl->mem_acct->rec[type].max_size,
- xl->mem_acct->rec[type].size);
- xl->mem_acct->rec[type].max_num_allocs = max(
- xl->mem_acct->rec[type].max_num_allocs,
- xl->mem_acct->rec[type].num_allocs);
- }
- UNLOCK(&xl->mem_acct->rec[type].lock);
+ if (mem_acct != NULL) {
+ GF_ASSERT(type <= mem_acct->num_types);
- GF_ATOMIC_INC(xl->mem_acct->refcnt);
+ rec = &mem_acct->rec[type];
+ LOCK(&rec->lock);
+ {
+ if (!rec->typestr) {
+ rec->typestr = typestr;
+ }
+ rec->size += size;
+ new_ref = (rec->num_allocs == 0);
+ rec->num_allocs++;
+ rec->total_allocs++;
+ rec->max_size = max(rec->max_size, rec->size);
+ rec->max_num_allocs = max(rec->max_num_allocs, rec->num_allocs);
+
+#ifdef DEBUG
+ list_add(&header->acct_list, &rec->obj_list);
+#endif
+ }
+ UNLOCK(&rec->lock);
+
+ /* We only take a reference for each memory type used, not for each
+ * allocation. This minimizes the use of atomic operations. */
+ if (new_ref) {
+ GF_ATOMIC_INC(mem_acct->refcnt);
+ }
+ }
- header = (struct mem_header *)ptr;
header->type = type;
- header->size = size;
- header->mem_acct = xl->mem_acct;
+ header->mem_acct = mem_acct;
header->magic = GF_MEM_HEADER_MAGIC;
+ return gf_mem_header_prepare(header, size);
+}
+
+static void *
+gf_mem_update_acct_info(struct mem_acct *mem_acct, struct mem_header *header,
+ size_t size)
+{
+ struct mem_acct_rec *rec = NULL;
+
+ if (mem_acct != NULL) {
+ rec = &mem_acct->rec[header->type];
+ LOCK(&rec->lock);
+ {
+ rec->size += size - header->size;
+ rec->total_allocs++;
+ rec->max_size = max(rec->max_size, rec->size);
+
#ifdef DEBUG
- INIT_LIST_HEAD(&header->acct_list);
- LOCK(&xl->mem_acct->rec[type].lock);
- {
- list_add(&header->acct_list, &(xl->mem_acct->rec[type].obj_list));
- }
- UNLOCK(&xl->mem_acct->rec[type].lock);
+ /* The old 'header' already was present in 'obj_list', but
+ * realloc() could have changed its address. We need to remove
+ * the old item from the list and add the new one. This can be
+ * done this way because list_move() doesn't use the pointers
+ * to the old location (which are not valid anymore) already
+ * present in the list, it simply overwrites them. */
+ list_move(&header->acct_list, &rec->obj_list);
#endif
- ptr += sizeof(struct mem_header);
- /* data follows in this gap of 'size' bytes */
- *(uint32_t *)(ptr + size) = GF_MEM_TRAILER_MAGIC;
+ }
+ UNLOCK(&rec->lock);
+ }
- *alloc_ptr = ptr;
- return 0;
+ return gf_mem_header_prepare(header, size);
}
void *
@@ -97,7 +128,7 @@ __gf_calloc(size_t nmemb, size_t size, uint32_t type, const char *typestr)
{
size_t tot_size = 0;
size_t req_size = 0;
- char *ptr = NULL;
+ void *ptr = NULL;
xlator_t *xl = NULL;
if (!THIS->ctx->mem_acct_enable)
@@ -114,16 +145,15 @@ __gf_calloc(size_t nmemb, size_t size, uint32_t type, const char *typestr)
gf_msg_nomem("", GF_LOG_ALERT, tot_size);
return NULL;
}
- gf_mem_set_acct_info(xl, &ptr, req_size, type, typestr);
- return (void *)ptr;
+ return gf_mem_set_acct_info(xl->mem_acct, ptr, req_size, type, typestr);
}
void *
__gf_malloc(size_t size, uint32_t type, const char *typestr)
{
size_t tot_size = 0;
- char *ptr = NULL;
+ void *ptr = NULL;
xlator_t *xl = NULL;
if (!THIS->ctx->mem_acct_enable)
@@ -138,84 +168,32 @@ __gf_malloc(size_t size, uint32_t type, const char *typestr)
gf_msg_nomem("", GF_LOG_ALERT, tot_size);
return NULL;
}
- gf_mem_set_acct_info(xl, &ptr, size, type, typestr);
- return (void *)ptr;
+ return gf_mem_set_acct_info(xl->mem_acct, ptr, size, type, typestr);
}
void *
__gf_realloc(void *ptr, size_t size)
{
size_t tot_size = 0;
- char *new_ptr;
- struct mem_header *old_header = NULL;
- struct mem_header *new_header = NULL;
- struct mem_header tmp_header;
+ struct mem_header *header = NULL;
if (!THIS->ctx->mem_acct_enable)
return REALLOC(ptr, size);
REQUIRE(NULL != ptr);
- old_header = (struct mem_header *)(ptr - GF_MEM_HEADER_SIZE);
- GF_ASSERT(old_header->magic == GF_MEM_HEADER_MAGIC);
- tmp_header = *old_header;
-
-#ifdef DEBUG
- int type = 0;
- size_t copy_size = 0;
-
- /* Making these changes for realloc is not straightforward. So
- * I am simulating realloc using calloc and free
- */
-
- type = tmp_header.type;
- new_ptr = __gf_calloc(1, size, type,
- tmp_header.mem_acct->rec[type].typestr);
- if (new_ptr) {
- copy_size = (size > tmp_header.size) ? tmp_header.size : size;
- memcpy(new_ptr, ptr, copy_size);
- __gf_free(ptr);
- }
-
- /* This is not quite what the man page says should happen */
- return new_ptr;
-#endif
+ header = (struct mem_header *)(ptr - GF_MEM_HEADER_SIZE);
+ GF_ASSERT(header->magic == GF_MEM_HEADER_MAGIC);
tot_size = size + GF_MEM_HEADER_SIZE + GF_MEM_TRAILER_SIZE;
- new_ptr = realloc(old_header, tot_size);
- if (!new_ptr) {
+ header = realloc(header, tot_size);
+ if (!header) {
gf_msg_nomem("", GF_LOG_ALERT, tot_size);
return NULL;
}
- /*
- * We used to pass (char **)&ptr as the second
- * argument after the value of realloc was saved
- * in ptr, but the compiler warnings complained
- * about the casting to and forth from void ** to
- * char **.
- * TBD: it would be nice to adjust the memory accounting info here,
- * but calling gf_mem_set_acct_info here is wrong because it bumps
- * up counts as though this is a new allocation - which it's not.
- * The consequence of doing nothing here is only that the sizes will be
- * wrong, but at least the counts won't be.
- uint32_t type = 0;
- xlator_t *xl = NULL;
- type = header->type;
- xl = (xlator_t *) header->xlator;
- gf_mem_set_acct_info (xl, &new_ptr, size, type, NULL);
- */
-
- new_header = (struct mem_header *)new_ptr;
- *new_header = tmp_header;
- new_header->size = size;
-
- new_ptr += sizeof(struct mem_header);
- /* data follows in this gap of 'size' bytes */
- *(uint32_t *)(new_ptr + size) = GF_MEM_TRAILER_MAGIC;
-
- return (void *)new_ptr;
+ return gf_mem_update_acct_info(header->mem_acct, header, size);
}
int
@@ -321,6 +299,7 @@ __gf_free(void *free_ptr)
void *ptr = NULL;
struct mem_acct *mem_acct;
struct mem_header *header = NULL;
+ bool last_ref = false;
if (!THIS->ctx->mem_acct_enable) {
FREE(free_ptr);
@@ -353,16 +332,18 @@ __gf_free(void *free_ptr)
mem_acct->rec[header->type].num_allocs--;
/* If all the instances are freed up then ensure typestr is set
* to NULL */
- if (!mem_acct->rec[header->type].num_allocs)
+ if (!mem_acct->rec[header->type].num_allocs) {
+ last_ref = true;
mem_acct->rec[header->type].typestr = NULL;
+ }
#ifdef DEBUG
list_del(&header->acct_list);
#endif
}
UNLOCK(&mem_acct->rec[header->type].lock);
- if (GF_ATOMIC_DEC(mem_acct->refcnt) == 0) {
- FREE(mem_acct);
+ if (last_ref) {
+ xlator_mem_acct_unref(mem_acct);
}
free:
diff --git a/libglusterfs/src/xlator.c b/libglusterfs/src/xlator.c
index 6bba99a74ef..292416ae449 100644
--- a/libglusterfs/src/xlator.c
+++ b/libglusterfs/src/xlator.c
@@ -736,6 +736,19 @@ xlator_mem_acct_init(xlator_t *xl, int num_types)
}
void
+xlator_mem_acct_unref(struct mem_acct *mem_acct)
+{
+ uint32_t i;
+
+ if (GF_ATOMIC_DEC(mem_acct->refcnt) == 0) {
+ for (i = 0; i < mem_acct->num_types; i++) {
+ LOCK_DESTROY(&(mem_acct->rec[i].lock));
+ }
+ FREE(mem_acct);
+ }
+}
+
+void
xlator_tree_fini(xlator_t *xl)
{
xlator_t *top = NULL;
@@ -766,7 +779,6 @@ xlator_list_destroy(xlator_list_t *list)
int
xlator_memrec_free(xlator_t *xl)
{
- uint32_t i = 0;
struct mem_acct *mem_acct = NULL;
if (!xl) {
@@ -775,13 +787,8 @@ xlator_memrec_free(xlator_t *xl)
mem_acct = xl->mem_acct;
if (mem_acct) {
- for (i = 0; i < mem_acct->num_types; i++) {
- LOCK_DESTROY(&(mem_acct->rec[i].lock));
- }
- if (GF_ATOMIC_DEC(mem_acct->refcnt) == 0) {
- FREE(mem_acct);
- xl->mem_acct = NULL;
- }
+ xlator_mem_acct_unref(mem_acct);
+ xl->mem_acct = NULL;
}
return 0;
generated by cgit (git 2.34.1) at 2025-11-04 10:31:03 +0000