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dns_cache: Replace cache timeout mechanism with time wheel algorithm to reduce CPU usage

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This commit is contained in:
Nick Peng
2023-09-23 23:31:19 +08:00
parent b7fb501be9
commit bfacad33ae
10 changed files with 760 additions and 356 deletions
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28
src/dns_cache.h
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@@ -25,6 +25,7 @@
#include "hash.h"
#include "hashtable.h"
#include "list.h"
#include "timer.h"
#include <stdlib.h>
#include <time.h>
@@ -45,12 +46,6 @@ enum CACHE_TYPE {
CACHE_TYPE_PACKET,
};
enum CACHE_RECORD_TYPE {
CACHE_RECORD_TYPE_ACTIVE,
CACHE_RECORD_TYPE_INACTIVE,
CACHE_RECORD_TYPE_END,
};
struct dns_cache_data_head {
enum CACHE_TYPE cache_type;
int is_soa;
@@ -90,7 +85,7 @@ struct dns_cache_info {
int ttl;
int hitnum;
int speed;
int no_inactive;
int timeout;
int hitnum_update_add;
int is_visited;
time_t insert_time;
@@ -99,7 +94,6 @@ struct dns_cache_info {
struct dns_cache_record {
uint32_t magic;
enum CACHE_RECORD_TYPE type;
struct dns_cache_info info;
};
@@ -113,6 +107,8 @@ struct dns_cache {
struct dns_cache_info info;
struct dns_cache_data *cache_data;
struct tw_timer_list timer;
};
struct dns_cache_file {
@@ -138,15 +134,14 @@ void dns_cache_data_free(struct dns_cache_data *data);
struct dns_cache_data *dns_cache_new_data_packet(void *packet, size_t packet_len);
int dns_cache_init(int size, int enable_inactive, int inactive_list_expired);
typedef int (*dns_cache_callback)(struct dns_cache *dns_cache);
int dns_cache_replace(struct dns_cache_key *key, int ttl, int speed, int no_inactive,
int dns_cache_init(int size, dns_cache_callback timeout_callback);
int dns_cache_replace(struct dns_cache_key *key, int ttl, int speed, int tiemout, int update_time,
struct dns_cache_data *cache_data);
int dns_cache_replace_inactive(struct dns_cache_key *key, int ttl, int speed, int no_inactive,
struct dns_cache_data *cache_data);
int dns_cache_insert(struct dns_cache_key *key, int ttl, int speed, int no_inactive, struct dns_cache_data *cache_data);
int dns_cache_insert(struct dns_cache_key *key, int ttl, int speed, int timeout, struct dns_cache_data *cache_data);
struct dns_cache *dns_cache_lookup(struct dns_cache_key *key);
@@ -162,11 +157,6 @@ int dns_cache_is_visited(struct dns_cache *dns_cache);
void dns_cache_update(struct dns_cache *dns_cache);
typedef void dns_cache_callback(struct dns_cache *dns_cache);
void dns_cache_invalidate(dns_cache_callback precallback, int ttl_pre, unsigned int max_callback_num,
dns_cache_callback inactive_precallback, int ttl_inactive_pre);
int dns_cache_get_ttl(struct dns_cache *dns_cache);
int dns_cache_get_cname_ttl(struct dns_cache *dns_cache);