fio.h - platform/external/fio - Gitiles

 #ifndef FIO_H
 #define FIO_H

 #include <sched.h>
 #include <limits.h>
 #include <pthread.h>
 #include <sys/time.h>
 #include <sys/resource.h>
 #include <errno.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <unistd.h>
 #include <string.h>
 #include <inttypes.h>
 #include <assert.h>

 #include "compiler/compiler.h"
 #include "thread_options.h"
 #include "flist.h"
 #include "fifo.h"
 #include "arch/arch.h"
 #include "os/os.h"
 #include "mutex.h"
 #include "log.h"
 #include "debug.h"
 #include "file.h"
 #include "io_ddir.h"
 #include "ioengine.h"
 #include "iolog.h"
 #include "helpers.h"
 #include "options.h"
 #include "profile.h"
 #include "time.h"
 #include "gettime.h"
 #include "lib/getopt.h"
 #include "lib/rand.h"
 #include "lib/rbtree.h"
 #include "client.h"
 #include "server.h"
 #include "stat.h"
 #include "flow.h"
 #include "io_u_queue.h"

 #ifdef CONFIG_SOLARISAIO
 #include <sys/asynch.h>
 #endif

 #ifdef CONFIG_LIBNUMA
 #include <linux/mempolicy.h>
 #include <numa.h>

 /*
  * "local" is pseudo-policy
  */
 #define MPOL_LOCAL MPOL_MAX
 #endif

 /*
  * offset generator types
  */
 enum {
 	RW_SEQ_SEQ	= 0,
 	RW_SEQ_IDENT,
 };

 enum {
 	TD_F_VER_BACKLOG	= 1,
 	TD_F_TRIM_BACKLOG	= 2,
 	TD_F_READ_IOLOG		= 4,
 	TD_F_REFILL_BUFFERS	= 8,
 	TD_F_SCRAMBLE_BUFFERS	= 16,
 	TD_F_VER_NONE		= 32,
 	TD_F_PROFILE_OPS	= 64,
 };

 enum {
 	FIO_RAND_BS_OFF		= 0,
 	FIO_RAND_VER_OFF,
 	FIO_RAND_MIX_OFF,
 	FIO_RAND_FILE_OFF,
 	FIO_RAND_BLOCK_OFF,
 	FIO_RAND_FILE_SIZE_OFF,
 	FIO_RAND_TRIM_OFF,
 	FIO_RAND_BUF_OFF,
 	FIO_RAND_SEQ_RAND_OFF,
 	FIO_RAND_NR_OFFS,
 };

 /*
  * This describes a single thread/process executing a fio job.
  */
 struct thread_data {
 	struct thread_options o;
 	unsigned long flags;
 	void *eo;
 	char verror[FIO_VERROR_SIZE];
 	pthread_t thread;
 	unsigned int thread_number;
 	unsigned int groupid;
 	struct thread_stat ts;

 	int client_type;

 	struct io_log *slat_log;
 	struct io_log *clat_log;
 	struct io_log *lat_log;
 	struct io_log *bw_log;
 	struct io_log *iops_log;

 	uint64_t stat_io_bytes[DDIR_RWDIR_CNT];
 	struct timeval bw_sample_time;

 	uint64_t stat_io_blocks[DDIR_RWDIR_CNT];
 	struct timeval iops_sample_time;

 	volatile int update_rusage;
 	struct fio_mutex *rusage_sem;
 	struct rusage ru_start;
 	struct rusage ru_end;

 	struct fio_file **files;
 	unsigned char *file_locks;
 	unsigned int files_size;
 	unsigned int files_index;
 	unsigned int nr_open_files;
 	unsigned int nr_done_files;
 	unsigned int nr_normal_files;
 	union {
 		unsigned int next_file;
 		os_random_state_t next_file_state;
 		struct frand_state __next_file_state;
 	};
 	int error;
 	int sig;
 	int done;
 	pid_t pid;
 	char *orig_buffer;
 	size_t orig_buffer_size;
 	volatile int terminate;
 	volatile int runstate;
 	unsigned int last_was_sync;
 	enum fio_ddir last_ddir;

 	int mmapfd;

 	void *iolog_buf;
 	FILE *iolog_f;

 	char *sysfs_root;

 	unsigned long rand_seeds[FIO_RAND_NR_OFFS];

 	union {
 		os_random_state_t bsrange_state;
 		struct frand_state __bsrange_state;
 	};
 	union {
 		os_random_state_t verify_state;
 		struct frand_state __verify_state;
 	};
 	union {
 		os_random_state_t trim_state;
 		struct frand_state __trim_state;
 	};

 	struct frand_state buf_state;

 	unsigned int verify_batch;
 	unsigned int trim_batch;

 	int shm_id;

 	/*
 	 * IO engine hooks, contains everything needed to submit an io_u
 	 * to any of the available IO engines.
 	 */
 	struct ioengine_ops *io_ops;

 	/*
 	 * Queue depth of io_u's that fio MIGHT do
 	 */
 	unsigned int cur_depth;

 	/*
 	 * io_u's about to be committed
 	 */
 	unsigned int io_u_queued;

 	/*
 	 * io_u's submitted but not completed yet
 	 */
 	unsigned int io_u_in_flight;

 	/*
 	 * List of free and busy io_u's
 	 */
 	struct io_u_ring io_u_requeues;
 	struct io_u_queue io_u_freelist;
 	struct io_u_queue io_u_all;
 	pthread_mutex_t io_u_lock;
 	pthread_cond_t free_cond;

 	/*
 	 * async verify offload
 	 */
 	struct flist_head verify_list;
 	pthread_t *verify_threads;
 	unsigned int nr_verify_threads;
 	pthread_cond_t verify_cond;
 	int verify_thread_exit;

 	/*
 	 * Rate state
 	 */
 	uint64_t rate_bps[DDIR_RWDIR_CNT];
 	long rate_pending_usleep[DDIR_RWDIR_CNT];
 	unsigned long rate_bytes[DDIR_RWDIR_CNT];
 	unsigned long rate_blocks[DDIR_RWDIR_CNT];
 	struct timeval lastrate[DDIR_RWDIR_CNT];

 	uint64_t total_io_size;
 	uint64_t fill_device_size;

 	unsigned long io_issues[DDIR_RWDIR_CNT];
 	uint64_t io_blocks[DDIR_RWDIR_CNT];
 	uint64_t this_io_blocks[DDIR_RWDIR_CNT];
 	uint64_t io_bytes[DDIR_RWDIR_CNT];
 	uint64_t io_skip_bytes;
 	uint64_t this_io_bytes[DDIR_RWDIR_CNT];
 	uint64_t zone_bytes;
 	struct fio_mutex *mutex;

 	/*
 	 * State for random io, a bitmap of blocks done vs not done
 	 */
 	union {
 		os_random_state_t random_state;
 		struct frand_state __random_state;
 	};

 	struct timeval start;	/* start of this loop */
 	struct timeval epoch;	/* time job was started */
 	struct timeval last_issue;
 	struct timeval tv_cache;
 	unsigned int tv_cache_nr;
 	unsigned int tv_cache_mask;
 	unsigned int ramp_time_over;

 	/*
 	 * read/write mixed workload state
 	 */
 	union {
 		os_random_state_t rwmix_state;
 		struct frand_state __rwmix_state;
 	};
 	unsigned long rwmix_issues;
 	enum fio_ddir rwmix_ddir;
 	unsigned int ddir_seq_nr;

 	/*
 	 * rand/seq mixed workload state
 	 */
 	union {
 		os_random_state_t seq_rand_state;
 		struct frand_state __seq_rand_state;
 	};

 	/*
 	 * IO history logs for verification. We use a tree for sorting,
 	 * if we are overwriting. Otherwise just use a fifo.
 	 */
 	struct rb_root io_hist_tree;
 	struct flist_head io_hist_list;
 	unsigned long io_hist_len;

 	/*
 	 * For IO replaying
 	 */
 	struct flist_head io_log_list;

 	/*
 	 * For tracking/handling discards
 	 */
 	struct flist_head trim_list;
 	unsigned long trim_entries;

 	struct flist_head next_rand_list;

 	/*
 	 * for fileservice, how often to switch to a new file
 	 */
 	unsigned int file_service_nr;
 	unsigned int file_service_left;
 	struct fio_file *file_service_file;

 	unsigned int sync_file_range_nr;

 	/*
 	 * For generating file sizes
 	 */
 	union {
 		os_random_state_t file_size_state;
 		struct frand_state __file_size_state;
 	};

 	/*
 	 * Error counts
 	 */
 	unsigned int total_err_count;
 	int first_error;

 	struct fio_flow *flow;

 	/*
 	 * Can be overloaded by profiles
 	 */
 	struct prof_io_ops prof_io_ops;
 	void *prof_data;

 	void *pinned_mem;
 };

 /*
  * when should interactive ETA output be generated
  */
 enum {
 	FIO_ETA_AUTO,
 	FIO_ETA_ALWAYS,
 	FIO_ETA_NEVER,
 };

 #define __td_verror(td, err, msg, func)					\
 	do {								\
 		int e = (err);						\
 		if ((td)->error)					\
 			break;						\
 		(td)->error = e;					\
 		if (!(td)->first_error)					\
 			snprintf(td->verror, sizeof(td->verror), "file:%s:%d, func=%s, error=%s", __FILE__, __LINE__, (func), (msg));		\
 	} while (0)


 #define td_clear_error(td)		\
 	(td)->error = 0;
 #define td_verror(td, err, func)	\
 	__td_verror((td), (err), strerror((err)), (func))
 #define td_vmsg(td, err, msg, func)	\
 	__td_verror((td), (err), (msg), (func))

 #define __fio_stringify_1(x)	#x
 #define __fio_stringify(x)	__fio_stringify_1(x)

 extern int exitall_on_terminate;
 extern unsigned int thread_number;
 extern unsigned int stat_number;
 extern int shm_id;
 extern int groupid;
 extern int output_format;
 extern int temp_stall_ts;
 extern uintptr_t page_mask, page_size;
 extern int read_only;
 extern int eta_print;
 extern int eta_new_line;
 extern unsigned long done_secs;
 extern char *job_section;
 extern int fio_gtod_offload;
 extern int fio_gtod_cpu;
 extern enum fio_cs fio_clock_source;
 extern int fio_clock_source_set;
 extern int warnings_fatal;
 extern int terse_version;
 extern int is_backend;
 extern int nr_clients;
 extern int log_syslog;
 extern int status_interval;
 extern const char fio_version_string[];

 extern struct thread_data *threads;

 static inline void fio_ro_check(struct thread_data *td, struct io_u *io_u)
 {
 	assert(!(io_u->ddir == DDIR_WRITE && !td_write(td)));
 }

 #define REAL_MAX_JOBS		2048

 static inline int should_fsync(struct thread_data *td)
 {
 	if (td->last_was_sync)
 		return 0;
 	if (td_write(td) || td_rw(td) || td->o.override_sync)
 		return 1;

 	return 0;
 }

 /*
  * Init/option functions
  */
 extern int __must_check fio_init_options(void);
 extern int __must_check parse_options(int, char **);
 extern int parse_jobs_ini(char *, int, int, int);
 extern int parse_cmd_line(int, char **, int);
 extern int fio_backend(void);
 extern void reset_fio_state(void);
 extern void clear_io_state(struct thread_data *);
 extern int fio_options_parse(struct thread_data *, char **, int);
 extern void fio_keywords_init(void);
 extern int fio_cmd_option_parse(struct thread_data *, const char *, char *);
 extern int fio_cmd_ioengine_option_parse(struct thread_data *, const char *, char *);
 extern void fio_fill_default_options(struct thread_data *);
 extern int fio_show_option_help(const char *);
 extern void fio_options_set_ioengine_opts(struct option *long_options, struct thread_data *td);
 extern void fio_options_dup_and_init(struct option *);
 extern void fio_options_mem_dupe(struct thread_data *);
 extern void options_mem_dupe(void *data, struct fio_option *options);
 extern void td_fill_rand_seeds(struct thread_data *);
 extern void add_job_opts(const char **, int);
 extern char *num2str(unsigned long, int, int, int, int);
 extern int ioengine_load(struct thread_data *);

 extern uintptr_t page_mask;
 extern uintptr_t page_size;
 extern int initialize_fio(char *envp[]);

 #define FIO_GETOPT_JOB		0x89000000
 #define FIO_GETOPT_IOENGINE	0x98000000
 #define FIO_NR_OPTIONS		(FIO_MAX_OPTS + 128)

 /*
  * ETA/status stuff
  */
 extern void print_thread_status(void);
 extern void print_status_init(int);
 extern char *fio_uint_to_kmg(unsigned int val);

 /*
  * Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
  * will never back again. It may cycle between running/verififying/fsyncing.
  * Once the thread reaches TD_EXITED, it is just waiting for the core to
  * reap it.
  */
 enum {
 	TD_NOT_CREATED = 0,
 	TD_CREATED,
 	TD_INITIALIZED,
 	TD_RAMP,
 	TD_SETTING_UP,
 	TD_RUNNING,
 	TD_PRE_READING,
 	TD_VERIFYING,
 	TD_FSYNCING,
 	TD_EXITED,
 	TD_REAPED,
 };

 extern void td_set_runstate(struct thread_data *, int);
 #define TERMINATE_ALL		(-1)
 extern void fio_terminate_threads(int);

 /*
  * Memory helpers
  */
 extern int __must_check fio_pin_memory(struct thread_data *);
 extern void fio_unpin_memory(struct thread_data *);
 extern int __must_check allocate_io_mem(struct thread_data *);
 extern void free_io_mem(struct thread_data *);
 extern void free_threads_shm(void);

 /*
  * Reset stats after ramp time completes
  */
 extern void reset_all_stats(struct thread_data *);

 /*
  * blktrace support
  */
 #ifdef FIO_HAVE_BLKTRACE
 extern int is_blktrace(const char *);
 extern int load_blktrace(struct thread_data *, const char *);
 #endif

 #define for_each_td(td, i)	\
 	for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
 #define for_each_file(td, f, i)	\
 	if ((td)->files_index)						\
 		for ((i) = 0, (f) = (td)->files[0];			\
 	    	 (i) < (td)->o.nr_files && ((f) = (td)->files[i]) != NULL; \
 		 (i)++)

 #define fio_assert(td, cond)	do {	\
 	if (!(cond)) {			\
 		int *__foo = NULL;	\
 		fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond);	\
 		td_set_runstate((td), TD_EXITED);	\
 		(td)->error = EFAULT;		\
 		*__foo = 0;			\
 	}	\
 } while (0)

 static inline int fio_fill_issue_time(struct thread_data *td)
 {
 	if (td->o.read_iolog_file ||
 	    !td->o.disable_clat || !td->o.disable_slat || !td->o.disable_bw)
 		return 1;

 	return 0;
 }

 static inline int __should_check_rate(struct thread_data *td,
 				      enum fio_ddir ddir)
 {
 	struct thread_options *o = &td->o;

 	/*
 	 * If some rate setting was given, we need to check it
 	 */
 	if (o->rate[ddir] || o->ratemin[ddir] || o->rate_iops[ddir] ||
 	    o->rate_iops_min[ddir])
 		return 1;

 	return 0;
 }

 static inline int should_check_rate(struct thread_data *td,
 				    uint64_t *bytes_done)
 {
 	int ret = 0;

 	if (bytes_done[DDIR_READ])
 		ret |= __should_check_rate(td, DDIR_READ);
 	if (bytes_done[DDIR_WRITE])
 		ret |= __should_check_rate(td, DDIR_WRITE);
 	if (bytes_done[DDIR_TRIM])
 		ret |= __should_check_rate(td, DDIR_TRIM);

 	return ret;
 }

 static inline unsigned int td_max_bs(struct thread_data *td)
 {
 	unsigned int max_bs;

 	max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
 	return max(td->o.max_bs[DDIR_TRIM], max_bs);
 }

 static inline unsigned int td_min_bs(struct thread_data *td)
 {
 	unsigned int min_bs;

 	min_bs = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
 	return min(td->o.min_bs[DDIR_TRIM], min_bs);
 }

 static inline int is_power_of_2(unsigned int val)
 {
 	return (val != 0 && ((val & (val - 1)) == 0));
 }

 /*
  * We currently only need to do locking if we have verifier threads
  * accessing our internal structures too
  */
 static inline void td_io_u_lock(struct thread_data *td)
 {
 	if (td->o.verify_async)
 		pthread_mutex_lock(&td->io_u_lock);
 }

 static inline void td_io_u_unlock(struct thread_data *td)
 {
 	if (td->o.verify_async)
 		pthread_mutex_unlock(&td->io_u_lock);
 }

 static inline void td_io_u_free_notify(struct thread_data *td)
 {
 	if (td->o.verify_async)
 		pthread_cond_signal(&td->free_cond);
 }

 extern const char *fio_get_arch_string(int);
 extern const char *fio_get_os_string(int);

 #define ARRAY_SIZE(x) (sizeof((x)) / (sizeof((x)[0])))

 enum {
 	FIO_OUTPUT_TERSE	= 0,
 	FIO_OUTPUT_JSON,
 	FIO_OUTPUT_NORMAL,
 };

 enum {
 	FIO_RAND_DIST_RANDOM	= 0,
 	FIO_RAND_DIST_ZIPF,
 	FIO_RAND_DIST_PARETO,
 };

 enum {
 	FIO_RAND_GEN_TAUSWORTHE = 0,
 	FIO_RAND_GEN_LFSR,
 };

 #endif
	#ifndef FIO_H
	#define FIO_H

	#include <sched.h>
	#include <limits.h>
	#include <pthread.h>
	#include <sys/time.h>
	#include <sys/resource.h>
	#include <errno.h>
	#include <stdlib.h>
	#include <stdio.h>
	#include <unistd.h>
	#include <string.h>
	#include <inttypes.h>
	#include <assert.h>

	#include "compiler/compiler.h"
	#include "thread_options.h"
	#include "flist.h"
	#include "fifo.h"
	#include "arch/arch.h"
	#include "os/os.h"
	#include "mutex.h"
	#include "log.h"
	#include "debug.h"
	#include "file.h"
	#include "io_ddir.h"
	#include "ioengine.h"
	#include "iolog.h"
	#include "helpers.h"
	#include "options.h"
	#include "profile.h"
	#include "time.h"
	#include "gettime.h"
	#include "lib/getopt.h"
	#include "lib/rand.h"
	#include "lib/rbtree.h"
	#include "client.h"
	#include "server.h"
	#include "stat.h"
	#include "flow.h"
	#include "io_u_queue.h"

	#ifdef CONFIG_SOLARISAIO
	#include <sys/asynch.h>
	#endif

	#ifdef CONFIG_LIBNUMA
	#include <linux/mempolicy.h>
	#include <numa.h>

	/*
	* "local" is pseudo-policy
	*/
	#define MPOL_LOCAL MPOL_MAX
	#endif

	/*
	* offset generator types
	*/
	enum {
	RW_SEQ_SEQ = 0,
	RW_SEQ_IDENT,
	};

	enum {
	TD_F_VER_BACKLOG = 1,
	TD_F_TRIM_BACKLOG = 2,
	TD_F_READ_IOLOG = 4,
	TD_F_REFILL_BUFFERS = 8,
	TD_F_SCRAMBLE_BUFFERS = 16,
	TD_F_VER_NONE = 32,
	TD_F_PROFILE_OPS = 64,
	};

	enum {
	FIO_RAND_BS_OFF = 0,
	FIO_RAND_VER_OFF,
	FIO_RAND_MIX_OFF,
	FIO_RAND_FILE_OFF,
	FIO_RAND_BLOCK_OFF,
	FIO_RAND_FILE_SIZE_OFF,
	FIO_RAND_TRIM_OFF,
	FIO_RAND_BUF_OFF,
	FIO_RAND_SEQ_RAND_OFF,
	FIO_RAND_NR_OFFS,
	};

	/*
	* This describes a single thread/process executing a fio job.
	*/
	struct thread_data {
	struct thread_options o;
	unsigned long flags;
	void *eo;
	char verror[FIO_VERROR_SIZE];
	pthread_t thread;
	unsigned int thread_number;
	unsigned int groupid;
	struct thread_stat ts;

	int client_type;

	struct io_log *slat_log;
	struct io_log *clat_log;
	struct io_log *lat_log;
	struct io_log *bw_log;
	struct io_log *iops_log;

	uint64_t stat_io_bytes[DDIR_RWDIR_CNT];
	struct timeval bw_sample_time;

	uint64_t stat_io_blocks[DDIR_RWDIR_CNT];
	struct timeval iops_sample_time;

	volatile int update_rusage;
	struct fio_mutex *rusage_sem;
	struct rusage ru_start;
	struct rusage ru_end;

	struct fio_file **files;
	unsigned char *file_locks;
	unsigned int files_size;
	unsigned int files_index;
	unsigned int nr_open_files;
	unsigned int nr_done_files;
	unsigned int nr_normal_files;
	union {
	unsigned int next_file;
	os_random_state_t next_file_state;
	struct frand_state __next_file_state;
	};
	int error;
	int sig;
	int done;
	pid_t pid;
	char *orig_buffer;
	size_t orig_buffer_size;
	volatile int terminate;
	volatile int runstate;
	unsigned int last_was_sync;
	enum fio_ddir last_ddir;

	int mmapfd;

	void *iolog_buf;
	FILE *iolog_f;

	char *sysfs_root;

	unsigned long rand_seeds[FIO_RAND_NR_OFFS];

	union {
	os_random_state_t bsrange_state;
	struct frand_state __bsrange_state;
	};
	union {
	os_random_state_t verify_state;
	struct frand_state __verify_state;
	};
	union {
	os_random_state_t trim_state;
	struct frand_state __trim_state;
	};

	struct frand_state buf_state;

	unsigned int verify_batch;
	unsigned int trim_batch;

	int shm_id;

	/*
	* IO engine hooks, contains everything needed to submit an io_u
	* to any of the available IO engines.
	*/
	struct ioengine_ops *io_ops;

	/*
	* Queue depth of io_u's that fio MIGHT do
	*/
	unsigned int cur_depth;

	/*
	* io_u's about to be committed
	*/
	unsigned int io_u_queued;

	/*
	* io_u's submitted but not completed yet
	*/
	unsigned int io_u_in_flight;

	/*
	* List of free and busy io_u's
	*/
	struct io_u_ring io_u_requeues;
	struct io_u_queue io_u_freelist;
	struct io_u_queue io_u_all;
	pthread_mutex_t io_u_lock;
	pthread_cond_t free_cond;

	/*
	* async verify offload
	*/
	struct flist_head verify_list;
	pthread_t *verify_threads;
	unsigned int nr_verify_threads;
	pthread_cond_t verify_cond;
	int verify_thread_exit;

	/*
	* Rate state
	*/
	uint64_t rate_bps[DDIR_RWDIR_CNT];
	long rate_pending_usleep[DDIR_RWDIR_CNT];
	unsigned long rate_bytes[DDIR_RWDIR_CNT];
	unsigned long rate_blocks[DDIR_RWDIR_CNT];
	struct timeval lastrate[DDIR_RWDIR_CNT];

	uint64_t total_io_size;
	uint64_t fill_device_size;

	unsigned long io_issues[DDIR_RWDIR_CNT];
	uint64_t io_blocks[DDIR_RWDIR_CNT];
	uint64_t this_io_blocks[DDIR_RWDIR_CNT];
	uint64_t io_bytes[DDIR_RWDIR_CNT];
	uint64_t io_skip_bytes;
	uint64_t this_io_bytes[DDIR_RWDIR_CNT];
	uint64_t zone_bytes;
	struct fio_mutex *mutex;

	/*
	* State for random io, a bitmap of blocks done vs not done
	*/
	union {
	os_random_state_t random_state;
	struct frand_state __random_state;
	};

	struct timeval start; /* start of this loop */
	struct timeval epoch; /* time job was started */
	struct timeval last_issue;
	struct timeval tv_cache;
	unsigned int tv_cache_nr;
	unsigned int tv_cache_mask;
	unsigned int ramp_time_over;

	/*
	* read/write mixed workload state
	*/
	union {
	os_random_state_t rwmix_state;
	struct frand_state __rwmix_state;
	};
	unsigned long rwmix_issues;
	enum fio_ddir rwmix_ddir;
	unsigned int ddir_seq_nr;

	/*
	* rand/seq mixed workload state
	*/
	union {
	os_random_state_t seq_rand_state;
	struct frand_state __seq_rand_state;
	};

	/*
	* IO history logs for verification. We use a tree for sorting,
	* if we are overwriting. Otherwise just use a fifo.
	*/
	struct rb_root io_hist_tree;
	struct flist_head io_hist_list;
	unsigned long io_hist_len;

	/*
	* For IO replaying
	*/
	struct flist_head io_log_list;

	/*
	* For tracking/handling discards
	*/
	struct flist_head trim_list;
	unsigned long trim_entries;

	struct flist_head next_rand_list;

	/*
	* for fileservice, how often to switch to a new file
	*/
	unsigned int file_service_nr;
	unsigned int file_service_left;
	struct fio_file *file_service_file;

	unsigned int sync_file_range_nr;

	/*
	* For generating file sizes
	*/
	union {
	os_random_state_t file_size_state;
	struct frand_state __file_size_state;
	};

	/*
	* Error counts
	*/
	unsigned int total_err_count;
	int first_error;

	struct fio_flow *flow;

	/*
	* Can be overloaded by profiles
	*/
	struct prof_io_ops prof_io_ops;
	void *prof_data;

	void *pinned_mem;
	};

	/*
	* when should interactive ETA output be generated
	*/
	enum {
	FIO_ETA_AUTO,
	FIO_ETA_ALWAYS,
	FIO_ETA_NEVER,
	};

	#define __td_verror(td, err, msg, func) \
	do { \
	int e = (err); \
	if ((td)->error) \
	break; \
	(td)->error = e; \
	if (!(td)->first_error) \
	snprintf(td->verror, sizeof(td->verror), "file:%s:%d, func=%s, error=%s", __FILE__, __LINE__, (func), (msg)); \
	} while (0)


	#define td_clear_error(td) \
	(td)->error = 0;
	#define td_verror(td, err, func) \
	__td_verror((td), (err), strerror((err)), (func))
	#define td_vmsg(td, err, msg, func) \
	__td_verror((td), (err), (msg), (func))

	#define __fio_stringify_1(x) #x
	#define __fio_stringify(x) __fio_stringify_1(x)

	extern int exitall_on_terminate;
	extern unsigned int thread_number;
	extern unsigned int stat_number;
	extern int shm_id;
	extern int groupid;
	extern int output_format;
	extern int temp_stall_ts;
	extern uintptr_t page_mask, page_size;
	extern int read_only;
	extern int eta_print;
	extern int eta_new_line;
	extern unsigned long done_secs;
	extern char *job_section;
	extern int fio_gtod_offload;
	extern int fio_gtod_cpu;
	extern enum fio_cs fio_clock_source;
	extern int fio_clock_source_set;
	extern int warnings_fatal;
	extern int terse_version;
	extern int is_backend;
	extern int nr_clients;
	extern int log_syslog;
	extern int status_interval;
	extern const char fio_version_string[];

	extern struct thread_data *threads;

	static inline void fio_ro_check(struct thread_data td, struct io_u io_u)
	{
	assert(!(io_u->ddir == DDIR_WRITE && !td_write(td)));
	}

	#define REAL_MAX_JOBS 2048

	static inline int should_fsync(struct thread_data *td)
	{
	if (td->last_was_sync)
	return 0;
	if (td_write(td) \|\| td_rw(td) \|\| td->o.override_sync)
	return 1;

	return 0;
	}

	/*
	* Init/option functions
	*/
	extern int __must_check fio_init_options(void);
	extern int __must_check parse_options(int, char **);
	extern int parse_jobs_ini(char *, int, int, int);
	extern int parse_cmd_line(int, char **, int);
	extern int fio_backend(void);
	extern void reset_fio_state(void);
	extern void clear_io_state(struct thread_data *);
	extern int fio_options_parse(struct thread_data , char *, int);
	extern void fio_keywords_init(void);
	extern int fio_cmd_option_parse(struct thread_data , const char , char *);
	extern int fio_cmd_ioengine_option_parse(struct thread_data , const char , char *);
	extern void fio_fill_default_options(struct thread_data *);
	extern int fio_show_option_help(const char *);
	extern void fio_options_set_ioengine_opts(struct option long_options, struct thread_data td);
	extern void fio_options_dup_and_init(struct option *);
	extern void fio_options_mem_dupe(struct thread_data *);
	extern void options_mem_dupe(void data, struct fio_option options);
	extern void td_fill_rand_seeds(struct thread_data *);
	extern void add_job_opts(const char **, int);
	extern char *num2str(unsigned long, int, int, int, int);
	extern int ioengine_load(struct thread_data *);

	extern uintptr_t page_mask;
	extern uintptr_t page_size;
	extern int initialize_fio(char *envp[]);

	#define FIO_GETOPT_JOB 0x89000000
	#define FIO_GETOPT_IOENGINE 0x98000000
	#define FIO_NR_OPTIONS (FIO_MAX_OPTS + 128)

	/*
	* ETA/status stuff
	*/
	extern void print_thread_status(void);
	extern void print_status_init(int);
	extern char *fio_uint_to_kmg(unsigned int val);

	/*
	* Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
	* will never back again. It may cycle between running/verififying/fsyncing.
	* Once the thread reaches TD_EXITED, it is just waiting for the core to
	* reap it.
	*/
	enum {
	TD_NOT_CREATED = 0,
	TD_CREATED,
	TD_INITIALIZED,
	TD_RAMP,
	TD_SETTING_UP,
	TD_RUNNING,
	TD_PRE_READING,
	TD_VERIFYING,
	TD_FSYNCING,
	TD_EXITED,
	TD_REAPED,
	};

	extern void td_set_runstate(struct thread_data *, int);
	#define TERMINATE_ALL (-1)
	extern void fio_terminate_threads(int);

	/*
	* Memory helpers
	*/
	extern int __must_check fio_pin_memory(struct thread_data *);
	extern void fio_unpin_memory(struct thread_data *);
	extern int __must_check allocate_io_mem(struct thread_data *);
	extern void free_io_mem(struct thread_data *);
	extern void free_threads_shm(void);

	/*
	* Reset stats after ramp time completes
	*/
	extern void reset_all_stats(struct thread_data *);

	/*
	* blktrace support
	*/
	#ifdef FIO_HAVE_BLKTRACE
	extern int is_blktrace(const char *);
	extern int load_blktrace(struct thread_data , const char );
	#endif

	#define for_each_td(td, i) \
	for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
	#define for_each_file(td, f, i) \
	if ((td)->files_index) \
	for ((i) = 0, (f) = (td)->files[0]; \
	(i) < (td)->o.nr_files && ((f) = (td)->files[i]) != NULL; \
	(i)++)

	#define fio_assert(td, cond) do { \
	if (!(cond)) { \
	int *__foo = NULL; \
	fprintf(stderr, "file:%s:%d, assert %s failed\n", __FILE__, __LINE__, #cond); \
	td_set_runstate((td), TD_EXITED); \
	(td)->error = EFAULT; \
	*__foo = 0; \
	} \
	} while (0)

	static inline int fio_fill_issue_time(struct thread_data *td)
	{
	if (td->o.read_iolog_file \|\|
	!td->o.disable_clat \|\| !td->o.disable_slat \|\| !td->o.disable_bw)
	return 1;

	return 0;
	}

	static inline int __should_check_rate(struct thread_data *td,
	enum fio_ddir ddir)
	{
	struct thread_options *o = &td->o;

	/*
	* If some rate setting was given, we need to check it
	*/
	if (o->rate[ddir] \|\| o->ratemin[ddir] \|\| o->rate_iops[ddir] \|\|
	o->rate_iops_min[ddir])
	return 1;

	return 0;
	}

	static inline int should_check_rate(struct thread_data *td,
	uint64_t *bytes_done)
	{
	int ret = 0;

	if (bytes_done[DDIR_READ])
	ret \|= __should_check_rate(td, DDIR_READ);
	if (bytes_done[DDIR_WRITE])
	ret \|= __should_check_rate(td, DDIR_WRITE);
	if (bytes_done[DDIR_TRIM])
	ret \|= __should_check_rate(td, DDIR_TRIM);

	return ret;
	}

	static inline unsigned int td_max_bs(struct thread_data *td)
	{
	unsigned int max_bs;

	max_bs = max(td->o.max_bs[DDIR_READ], td->o.max_bs[DDIR_WRITE]);
	return max(td->o.max_bs[DDIR_TRIM], max_bs);
	}

	static inline unsigned int td_min_bs(struct thread_data *td)
	{
	unsigned int min_bs;

	min_bs = min(td->o.min_bs[DDIR_READ], td->o.min_bs[DDIR_WRITE]);
	return min(td->o.min_bs[DDIR_TRIM], min_bs);
	}

	static inline int is_power_of_2(unsigned int val)
	{
	return (val != 0 && ((val & (val - 1)) == 0));
	}

	/*
	* We currently only need to do locking if we have verifier threads
	* accessing our internal structures too
	*/
	static inline void td_io_u_lock(struct thread_data *td)
	{
	if (td->o.verify_async)
	pthread_mutex_lock(&td->io_u_lock);
	}

	static inline void td_io_u_unlock(struct thread_data *td)
	{
	if (td->o.verify_async)
	pthread_mutex_unlock(&td->io_u_lock);
	}

	static inline void td_io_u_free_notify(struct thread_data *td)
	{
	if (td->o.verify_async)
	pthread_cond_signal(&td->free_cond);
	}

	extern const char *fio_get_arch_string(int);
	extern const char *fio_get_os_string(int);

	#define ARRAY_SIZE(x) (sizeof((x)) / (sizeof((x)[0])))

	enum {
	FIO_OUTPUT_TERSE = 0,
	FIO_OUTPUT_JSON,
	FIO_OUTPUT_NORMAL,
	};

	enum {
	FIO_RAND_DIST_RANDOM = 0,
	FIO_RAND_DIST_ZIPF,
	FIO_RAND_DIST_PARETO,
	};

	enum {
	FIO_RAND_GEN_TAUSWORTHE = 0,
	FIO_RAND_GEN_LFSR,
	};

	#endif