#include <stdlib.h>
#include <string.h>
#include <pthread.h>
-
#include "config.h"
+#include "zmalloc.h"
+#ifdef HAVE_MALLOC_SIZE
+#define PREFIX_SIZE (0)
+#else
#if defined(__sun)
-#define PREFIX_SIZE sizeof(long long)
+#define PREFIX_SIZE (sizeof(long long))
#else
-#define PREFIX_SIZE sizeof(size_t)
+#define PREFIX_SIZE (sizeof(size_t))
+#endif
#endif
-#define increment_used_memory(__n) do { \
+/* Explicitly override malloc/free etc when using tcmalloc. */
+#if defined(USE_TCMALLOC)
+#define malloc(size) tc_malloc(size)
+#define calloc(count,size) tc_calloc(count,size)
+#define realloc(ptr,size) tc_realloc(ptr,size)
+#define free(ptr) tc_free(ptr)
+#endif
+
+#define update_zmalloc_stat_alloc(__n,__size) do { \
size_t _n = (__n); \
+ size_t _stat_slot = (__size < ZMALLOC_MAX_ALLOC_STAT) ? __size : ZMALLOC_MAX_ALLOC_STAT; \
if (_n&(sizeof(long)-1)) _n += sizeof(long)-(_n&(sizeof(long)-1)); \
if (zmalloc_thread_safe) { \
pthread_mutex_lock(&used_memory_mutex); \
used_memory += _n; \
+ zmalloc_allocations[_stat_slot]++; \
pthread_mutex_unlock(&used_memory_mutex); \
} else { \
used_memory += _n; \
+ zmalloc_allocations[_stat_slot]++; \
} \
} while(0)
-#define decrement_used_memory(__n) do { \
+#define update_zmalloc_stat_free(__n) do { \
size_t _n = (__n); \
if (_n&(sizeof(long)-1)) _n += sizeof(long)-(_n&(sizeof(long)-1)); \
if (zmalloc_thread_safe) { \
static size_t used_memory = 0;
static int zmalloc_thread_safe = 0;
pthread_mutex_t used_memory_mutex = PTHREAD_MUTEX_INITIALIZER;
+/* Note that malloc_allocations elements are initialized to zero by C */
+size_t zmalloc_allocations[ZMALLOC_MAX_ALLOC_STAT+1];
static void zmalloc_oom(size_t size) {
fprintf(stderr, "zmalloc: Out of memory trying to allocate %zu bytes\n",
if (!ptr) zmalloc_oom(size);
#ifdef HAVE_MALLOC_SIZE
- increment_used_memory(redis_malloc_size(ptr));
+ update_zmalloc_stat_alloc(redis_malloc_size(ptr),size);
return ptr;
#else
*((size_t*)ptr) = size;
- increment_used_memory(size+PREFIX_SIZE);
+ update_zmalloc_stat_alloc(size+PREFIX_SIZE,size);
return (char*)ptr+PREFIX_SIZE;
#endif
}
if (!ptr) zmalloc_oom(size);
#ifdef HAVE_MALLOC_SIZE
- increment_used_memory(redis_malloc_size(ptr));
+ update_zmalloc_stat_alloc(redis_malloc_size(ptr),size);
return ptr;
#else
*((size_t*)ptr) = size;
- increment_used_memory(size+PREFIX_SIZE);
+ update_zmalloc_stat_alloc(size+PREFIX_SIZE,size);
return (char*)ptr+PREFIX_SIZE;
#endif
}
newptr = realloc(ptr,size);
if (!newptr) zmalloc_oom(size);
- decrement_used_memory(oldsize);
- increment_used_memory(redis_malloc_size(newptr));
+ update_zmalloc_stat_free(oldsize);
+ update_zmalloc_stat_alloc(redis_malloc_size(newptr),size);
return newptr;
#else
realptr = (char*)ptr-PREFIX_SIZE;
if (!newptr) zmalloc_oom(size);
*((size_t*)newptr) = size;
- decrement_used_memory(oldsize);
- increment_used_memory(size);
+ update_zmalloc_stat_free(oldsize);
+ update_zmalloc_stat_alloc(size,size);
return (char*)newptr+PREFIX_SIZE;
#endif
}
if (ptr == NULL) return;
#ifdef HAVE_MALLOC_SIZE
- decrement_used_memory(redis_malloc_size(ptr));
+ update_zmalloc_stat_free(redis_malloc_size(ptr));
free(ptr);
#else
realptr = (char*)ptr-PREFIX_SIZE;
oldsize = *((size_t*)realptr);
- decrement_used_memory(oldsize+PREFIX_SIZE);
+ update_zmalloc_stat_free(oldsize+PREFIX_SIZE);
free(realptr);
#endif
}
return um;
}
+size_t zmalloc_allocations_for_size(size_t size) {
+ if (size > ZMALLOC_MAX_ALLOC_STAT) return 0;
+ return zmalloc_allocations[size];
+}
+
void zmalloc_enable_thread_safeness(void) {
zmalloc_thread_safe = 1;
}
-/* Fragmentation = RSS / allocated-bytes */
+/* Get the RSS information in an OS-specific way.
+ *
+ * WARNING: the function zmalloc_get_rss() is not designed to be fast
+ * and may not be called in the busy loops where Redis tries to release
+ * memory expiring or swapping out objects.
+ *
+ * For this kind of "fast RSS reporting" usages use instead the
+ * function RedisEstimateRSS() that is a much faster (and less precise)
+ * version of the funciton. */
#if defined(HAVE_PROCFS)
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>
-float zmalloc_get_fragmentation_ratio(void) {
- size_t allocated = zmalloc_used_memory();
+size_t zmalloc_get_rss(void) {
int page = sysconf(_SC_PAGESIZE);
size_t rss;
char buf[4096];
rss = strtoll(p,NULL,10);
rss *= page;
- return (float)rss/allocated;
+ return rss;
}
#elif defined(HAVE_TASKINFO)
#include <unistd.h>
#include <mach/task.h>
#include <mach/mach_init.h>
-float zmalloc_get_fragmentation_ratio(void) {
+size_t zmalloc_get_rss(void) {
task_t task = MACH_PORT_NULL;
struct task_basic_info t_info;
mach_msg_type_number_t t_info_count = TASK_BASIC_INFO_COUNT;
return 0;
task_info(task, TASK_BASIC_INFO, (task_info_t)&t_info, &t_info_count);
- return (float)t_info.resident_size/zmalloc_used_memory();
+ return t_info.resident_size;
}
#else
-float zmalloc_get_fragmentation_ratio(void) {
- return 0;
+size_t zmalloc_get_rss(void) {
+ /* If we can't get the RSS in an OS-specific way for this system just
+ * return the memory usage we estimated in zmalloc()..
+ *
+ * Fragmentation will appear to be always 1 (no fragmentation)
+ * of course... */
+ return zmalloc_used_memory();
}
#endif
+
+/* Fragmentation = RSS / allocated-bytes */
+float zmalloc_get_fragmentation_ratio(void) {
+ return (float)zmalloc_get_rss()/zmalloc_used_memory();
+}
projects / redis.git / blobdiff