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topkeys.h
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topkeys.h
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/*
* arcus-memcached - Arcus memory cache server
* Copyright 2010-2014 NAVER Corp.
* Copyright 2015 JaM2in Co., Ltd.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#ifndef TOPKEYS_H
#define TOPKEYS_H 1
#include <memcached/engine.h>
#include <memcached/genhash.h>
/* A list of operations for which we have int stats */
#define TK_OPS(C) C(get_hits) C(get_misses) C(cmd_set) C(incr_hits) \
C(incr_misses) C(decr_hits) C(decr_misses) \
C(delete_hits) C(delete_misses) C(evictions)
/* top keys - collection stats */
#define TK_LOPS(C) C(lop_create_oks) C(lop_insert_hits) C(lop_insert_misses) \
C(lop_delete_elem_hits) C(lop_delete_none_hits) C(lop_delete_misses) \
C(lop_get_elem_hits) C(lop_get_none_hits) C(lop_get_misses)
#define TK_SOPS(C) C(sop_create_oks) C(sop_insert_hits) C(sop_insert_misses) \
C(sop_delete_elem_hits) C(sop_delete_none_hits) C(sop_delete_misses) \
C(sop_get_elem_hits) C(sop_get_none_hits) C(sop_get_misses) \
C(sop_exist_hits) C(sop_exist_misses)
#define TK_MOPS(C) C(mop_create_oks) C(mop_insert_hits) C(mop_insert_misses) \
C(mop_update_elem_hits) C(mop_update_none_hits) C(mop_update_misses) \
C(mop_delete_elem_hits) C(mop_delete_none_hits) C(mop_delete_misses) \
C(mop_get_elem_hits) C(mop_get_none_hits) C(mop_get_misses)
#define TK_BOPS(C) C(bop_create_oks) C(bop_insert_hits) C(bop_insert_misses) \
C(bop_update_elem_hits) C(bop_update_none_hits) C(bop_update_misses) \
C(bop_delete_elem_hits) C(bop_delete_none_hits) C(bop_delete_misses) \
C(bop_get_elem_hits) C(bop_get_none_hits) C(bop_get_misses) \
C(bop_count_hits) C(bop_count_misses) \
C(bop_position_elem_hits) C(bop_position_none_hits) C(bop_position_misses) \
C(bop_pwg_elem_hits) C(bop_pwg_none_hits) C(bop_pwg_misses) \
C(bop_gbp_elem_hits) C(bop_gbp_none_hits) C(bop_gbp_misses)
#ifdef SUPPORT_BOP_MGET
#define TK_BMGET(C) C(bop_mget_oks)
#endif
#ifdef SUPPORT_BOP_SMGET
#define TK_SMGET(C) C(bop_smget_oks)
#endif
#define TK_BINCR(C) C(bop_incr_elem_hits) C(bop_incr_none_hits) C(bop_incr_misses)
#define TK_BDECR(C) C(bop_decr_elem_hits) C(bop_decr_none_hits) C(bop_decr_misses)
#define TK_AOPS(C) C(getattr_hits) C(getattr_misses) C(setattr_hits) C(setattr_misses)
#define TK_MAX_VAL_LEN 250
/* Update the correct stat for a given operation */
#define TK(tk, op, key, nkey, ctime) { \
if (tk) { \
assert(key); \
assert(nkey > 0); \
pthread_mutex_lock(&tk->mutex); \
topkey_item_t *tmp = topkeys_item_get_or_create( \
(tk), (key), (nkey), (ctime)); \
tmp->op++; \
pthread_mutex_unlock(&tk->mutex); \
} \
}
typedef struct dlist {
struct dlist *next;
struct dlist *prev;
} dlist_t;
typedef struct topkey_item {
dlist_t list; /* Must be at the beginning because we downcast! */
int nkey;
rel_time_t ctime, atime; /* Time this item was created/last accessed */
#define TK_CUR(name) int name;
TK_OPS(TK_CUR)
TK_LOPS(TK_CUR)
TK_SOPS(TK_CUR)
TK_MOPS(TK_CUR)
TK_BOPS(TK_CUR)
#ifdef SUPPORT_BOP_MGET
TK_BMGET(TK_CUR)
#endif
#ifdef SUPPORT_BOP_SMGET
TK_SMGET(TK_CUR)
#endif
TK_BINCR(TK_CUR)
TK_BDECR(TK_CUR)
TK_AOPS(TK_CUR)
#undef TK_CUR
char key[]; /* A variable length array in the struct itself */
} topkey_item_t;
typedef struct topkeys {
dlist_t list;
pthread_mutex_t mutex;
genhash_t *hash;
int nkeys;
int max_keys;
} topkeys_t;
topkeys_t *topkeys_init(int max_keys);
void topkeys_free(topkeys_t *topkeys);
topkey_item_t *topkeys_item_get_or_create(topkeys_t *tk, const void *key, size_t nkey, const rel_time_t ctime);
ENGINE_ERROR_CODE topkeys_stats(topkeys_t *tk, const void *cookie, const rel_time_t current_time, ADD_STAT add_stat);
#endif