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/*
Copyright (c) 2008-2012 Red Hat, Inc. <http://www.redhat.com>
This file is part of GlusterFS.
This file is licensed to you under your choice of the GNU Lesser
General Public License, version 3 or any later version (LGPLv3 or
later), or the GNU General Public License, version 2 (GPLv2), in all
cases as published by the Free Software Foundation.
*/
#ifndef __IOT_H
#define __IOT_H
#include "compat-errno.h"
#include "glusterfs.h"
#include "logging.h"
#include "dict.h"
#include "xlator.h"
#include "common-utils.h"
#include "list.h"
#include <stdlib.h>
#include "locking.h"
#include "iot-mem-types.h"
#include <semaphore.h>
#include "statedump.h"
struct iot_conf;
#define MAX_IDLE_SKEW 4 /* In secs */
#define skew_sec_idle_time(sec) ((sec) + (random () % MAX_IDLE_SKEW))
#define IOT_DEFAULT_IDLE 120 /* In secs. */
#define IOT_MIN_THREADS 1
#define IOT_DEFAULT_THREADS 16
#define IOT_MAX_THREADS 64
#define IOT_THREAD_STACK_SIZE ((size_t)(1024*1024))
typedef enum {
IOT_PRI_HI = 0, /* low latency */
IOT_PRI_NORMAL, /* normal */
IOT_PRI_LO, /* bulk */
IOT_PRI_LEAST, /* least */
IOT_PRI_MAX,
} iot_pri_t;
#define IOT_LEAST_THROTTLE_DELAY 1 /* sample interval in seconds */
struct iot_least_throttle {
struct timeval sample_time; /* timestamp of current sample */
uint32_t sample_cnt; /* sample count for active interval */
uint32_t cached_rate; /* the most recently measured rate */
int32_t rate_limit; /* user-specified rate limit */
pthread_mutex_t lock;
};
struct iot_conf {
pthread_mutex_t mutex;
pthread_cond_t cond;
int32_t max_count; /* configured maximum */
int32_t curr_count; /* actual number of threads running */
int32_t sleep_count;
int32_t idle_time; /* in seconds */
struct list_head reqs[IOT_PRI_MAX];
int32_t ac_iot_limit[IOT_PRI_MAX];
int32_t ac_iot_count[IOT_PRI_MAX];
int queue_sizes[IOT_PRI_MAX];
int queue_size;
pthread_attr_t w_attr;
gf_boolean_t least_priority; /*Enable/Disable least-priority */
xlator_t *this;
size_t stack_size;
struct iot_least_throttle throttle;
};
typedef struct iot_conf iot_conf_t;
#endif /* __IOT_H */
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