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Dynamic HZ: separate hz from the configured hz.

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This way we can remember what the user configured HZ is, but change the
actual HZ dynamically if needed in the dynamic HZ feature
implementation.
This commit is contained in:
antirez 2018-07-23 14:13:58 +02:00
parent 4ff47a0b9b
commit e6ea603ad3
3 changed files with 15 additions and 9 deletions
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16
src/config.c
View File

@ -441,9 +441,9 @@ void loadServerConfigFromString(char *config) {
err = "argument must be 'yes' or 'no'"; goto loaderr;
}
} else if (!strcasecmp(argv[0],"hz") && argc == 2) {
server.hz = atoi(argv[1]);
if (server.hz < CONFIG_MIN_HZ) server.hz = CONFIG_MIN_HZ;
if (server.hz > CONFIG_MAX_HZ) server.hz = CONFIG_MAX_HZ;
server.config_hz = atoi(argv[1]);
if (server.config_hz < CONFIG_MIN_HZ) server.config_hz = CONFIG_MIN_HZ;
if (server.config_hz > CONFIG_MAX_HZ) server.config_hz = CONFIG_MAX_HZ;
} else if (!strcasecmp(argv[0],"appendonly") && argc == 2) {
int yes;
@ -1158,11 +1158,11 @@ void configSetCommand(client *c) {
} config_set_numerical_field(
"cluster-slave-validity-factor",server.cluster_slave_validity_factor,0,INT_MAX) {
} config_set_numerical_field(
"hz",server.hz,0,INT_MAX) {
"hz",server.config_hz,0,INT_MAX) {
/* Hz is more an hint from the user, so we accept values out of range
* but cap them to reasonable values. */
if (server.hz < CONFIG_MIN_HZ) server.hz = CONFIG_MIN_HZ;
if (server.hz > CONFIG_MAX_HZ) server.hz = CONFIG_MAX_HZ;
if (server.config_hz < CONFIG_MIN_HZ) server.config_hz = CONFIG_MIN_HZ;
if (server.config_hz > CONFIG_MAX_HZ) server.config_hz = CONFIG_MAX_HZ;
} config_set_numerical_field(
"watchdog-period",ll,0,INT_MAX) {
if (ll)
@ -1329,7 +1329,7 @@ void configGetCommand(client *c) {
config_get_numerical_field("slave-announce-port",server.slave_announce_port);
config_get_numerical_field("min-slaves-to-write",server.repl_min_slaves_to_write);
config_get_numerical_field("min-slaves-max-lag",server.repl_min_slaves_max_lag);
config_get_numerical_field("hz",server.hz);
config_get_numerical_field("hz",server.config_hz);
config_get_numerical_field("cluster-node-timeout",server.cluster_node_timeout);
config_get_numerical_field("cluster-migration-barrier",server.cluster_migration_barrier);
config_get_numerical_field("cluster-slave-validity-factor",server.cluster_slave_validity_factor);
@ -2098,7 +2098,7 @@ int rewriteConfig(char *path) {
rewriteConfigYesNoOption(state,"activedefrag",server.active_defrag_enabled,CONFIG_DEFAULT_ACTIVE_DEFRAG);
rewriteConfigYesNoOption(state,"protected-mode",server.protected_mode,CONFIG_DEFAULT_PROTECTED_MODE);
rewriteConfigClientoutputbufferlimitOption(state);
rewriteConfigNumericalOption(state,"hz",server.hz,CONFIG_DEFAULT_HZ);
rewriteConfigNumericalOption(state,"hz",server.config_hz,CONFIG_DEFAULT_HZ);
rewriteConfigYesNoOption(state,"aof-rewrite-incremental-fsync",server.aof_rewrite_incremental_fsync,CONFIG_DEFAULT_AOF_REWRITE_INCREMENTAL_FSYNC);
rewriteConfigYesNoOption(state,"rdb-save-incremental-fsync",server.rdb_save_incremental_fsync,CONFIG_DEFAULT_RDB_SAVE_INCREMENTAL_FSYNC);
rewriteConfigYesNoOption(state,"aof-load-truncated",server.aof_load_truncated,CONFIG_DEFAULT_AOF_LOAD_TRUNCATED);

5
src/server.c
View File

@ -1512,7 +1512,7 @@ void initServerConfig(void) {
server.timezone = timezone; /* Initialized by tzset(). */
server.configfile = NULL;
server.executable = NULL;
server.hz = CONFIG_DEFAULT_HZ;
server.config_hz = CONFIG_DEFAULT_HZ;
server.arch_bits = (sizeof(long) == 8) ? 64 : 32;
server.port = CONFIG_DEFAULT_SERVER_PORT;
server.tcp_backlog = CONFIG_DEFAULT_TCP_BACKLOG;
@ -1991,6 +1991,7 @@ void initServer(void) {
server.syslog_facility);
}
server.hz = server.config_hz;
server.pid = getpid();
server.current_client = NULL;
server.clients = listCreate();
@ -3074,6 +3075,7 @@ sds genRedisInfoString(char *section) {
"uptime_in_seconds:%jd\r\n"
"uptime_in_days:%jd\r\n"
"hz:%d\r\n"
"configured_hz:%d\r\n"
"lru_clock:%ld\r\n"
"executable:%s\r\n"
"config_file:%s\r\n",
@ -3097,6 +3099,7 @@ sds genRedisInfoString(char *section) {
(intmax_t)uptime,
(intmax_t)(uptime/(3600*24)),
server.hz,
server.config_hz,
(unsigned long) lruclock,
server.executable ? server.executable : "",
server.configfile ? server.configfile : "");

3
src/server.h
View File

@ -923,6 +923,9 @@ struct redisServer {
char *configfile; /* Absolute config file path, or NULL */
char *executable; /* Absolute executable file path. */
char **exec_argv; /* Executable argv vector (copy). */
int config_hz; /* Configured HZ value. May be different than
the actual 'hz' field value if dynamic-hz
is enabled. */
int hz; /* serverCron() calls frequency in hertz */
redisDb *db;
dict *commands; /* Command table */