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sds size classes - memory optimization

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This commit is contained in:
Oran Agra
2015-04-09 10:37:01 +03:00
committed by antirez
parent 0f64080dcb
commit f15df8ba5d
8 changed files with 363 additions and 138 deletions
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9
src/object.c
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@ -58,8 +58,8 @@ robj *createRawStringObject(const char *ptr, size_t len) {
* an object where the sds string is actually an unmodifiable string
* allocated in the same chunk as the object itself. */
robj *createEmbeddedStringObject(const char *ptr, size_t len) {
robj *o = zmalloc(sizeof(robj)+sizeof(struct sdshdr)+len+1);
struct sdshdr *sh = (void*)(o+1);
robj *o = zmalloc(sizeof(robj)+sizeof(struct sdshdr8)+len+1);
struct sdshdr8 *sh = (void*)(o+1);
o->type = REDIS_STRING;
o->encoding = REDIS_ENCODING_EMBSTR;
@ -68,7 +68,8 @@ robj *createEmbeddedStringObject(const char *ptr, size_t len) {
o->lru = LRU_CLOCK();
sh->len = len;
sh->free = 0;
sh->alloc = len;
sh->flags = SDS_TYPE_8;
if (ptr) {
memcpy(sh->buf,ptr,len);
sh->buf[len] = '\0';
@ -84,7 +85,7 @@ robj *createEmbeddedStringObject(const char *ptr, size_t len) {
*
* The current limit of 39 is chosen so that the biggest string object
* we allocate as EMBSTR will still fit into the 64 byte arena of jemalloc. */
#define REDIS_ENCODING_EMBSTR_SIZE_LIMIT 39
#define REDIS_ENCODING_EMBSTR_SIZE_LIMIT 44
robj *createStringObject(const char *ptr, size_t len) {
if (len <= REDIS_ENCODING_EMBSTR_SIZE_LIMIT)
return createEmbeddedStringObject(ptr,len);