[fio.git] / fio.h

#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 "list.h"
#include "md5.h"
#include "crc32.h"
#include "arch.h"
#include "os.h"

enum fio_ddir {
	DDIR_READ = 0,
	DDIR_WRITE,
	DDIR_SYNC,
};

struct io_stat {
	unsigned long val;
	unsigned long val_sq;
	unsigned long max_val;
	unsigned long min_val;
	unsigned long samples;
};

struct io_sample {
	unsigned long time;
	unsigned long val;
	enum fio_ddir ddir;
};

struct io_log {
	unsigned long nr_samples;
	unsigned long max_samples;
	struct io_sample *log;
};

struct io_piece {
	struct list_head list;
	struct fio_file *file;
	unsigned long long offset;
	unsigned int len;
	enum fio_ddir ddir;
};

/*
 * The io unit
 */
struct io_u {
	union {
#ifdef FIO_HAVE_LIBAIO
		struct iocb iocb;
#endif
#ifdef FIO_HAVE_POSIXAIO
		struct aiocb aiocb;
#endif
#ifdef FIO_HAVE_SGIO
		struct sg_io_hdr hdr;
#endif
	};
	struct timeval start_time;
	struct timeval issue_time;

	void *buf;
	unsigned int buflen;
	unsigned long long offset;

	unsigned int resid;
	unsigned int error;

	enum fio_ddir ddir;

	/*
	 * io engine private data
	 */
	union {
		unsigned int index;
		unsigned int seen;
	};

	struct fio_file *file;

	struct list_head list;
};

#define FIO_HDR_MAGIC	0xf00baaef

enum {
	VERIFY_NONE = 0,
	VERIFY_MD5,
	VERIFY_CRC32,
};

struct verify_header {
	unsigned int fio_magic;
	unsigned int len;
	unsigned int verify_type;
	union {
		char md5_digest[MD5_HASH_WORDS * 4];
		unsigned long crc32;
	};
};

struct group_run_stats {
	unsigned long long max_run[2], min_run[2];
	unsigned long long max_bw[2], min_bw[2];
	unsigned long long io_kb[2];
	unsigned long long agg[2];
};

/*
 * What type of allocation to use for io buffers
 */
enum fio_memtype {
	MEM_MALLOC = 0,	/* ordinary malloc */
	MEM_SHM,	/* use shared memory segments */
	MEM_SHMHUGE,	/* use shared memory segments with huge pages */
	MEM_MMAP,	/* use anonynomous mmap */
};

/*
 * The type of object we are working on
 */
enum fio_filetype {
	FIO_TYPE_FILE = 1,
	FIO_TYPE_BD,
	FIO_TYPE_CHAR,
};

enum fio_ioengine_flags {
	FIO_SYNCIO	= 1 << 0,
	FIO_CPUIO	= 1 << 1,
	FIO_MMAPIO	= 1 << 2,
	FIO_RAWIO	= 1 << 3,
};

struct fio_file {
	/*
	 * A file may not be a file descriptor, let the io engine decide
	 */
	union {
		unsigned long file_data;
		int fd;
	};
	char *file_name;
	void *mmap;
	unsigned long long file_size;
	unsigned long long real_file_size;
	unsigned long long file_offset;
	unsigned long long last_pos;
	unsigned long long last_completed_pos;

	unsigned long *file_map;
	unsigned int num_maps;

	unsigned int unlink;
};

/*
 * This describes a single thread/process executing a fio job.
 */
struct thread_data {
	char *name;
	char *directory;
	char *filename;
	char verror[80];
	pthread_t thread;
	int thread_number;
	int groupid;
	enum fio_filetype filetype;
	struct fio_file *files;
	unsigned int nr_files;
	unsigned int nr_uniq_files;
	unsigned int next_file;
	int error;
	pid_t pid;
	char *orig_buffer;
	size_t orig_buffer_size;
	volatile int terminate;
	volatile int runstate;
	enum fio_ddir ddir;
	unsigned int iomix;
	unsigned int ioprio;
	unsigned int last_was_sync;

	unsigned int sequential;
	unsigned int odirect;
	unsigned int invalidate_cache;
	unsigned int create_serialize;
	unsigned int create_fsync;
	unsigned int end_fsync;
	unsigned int sync_io;
	unsigned int verify;
	unsigned int use_thread;
	unsigned int unlink;
	unsigned int do_disk_util;
	unsigned int override_sync;
	unsigned int rand_repeatable;
	unsigned int write_lat_log;
	unsigned int write_bw_log;
	unsigned int norandommap;
	unsigned int bs_unaligned;

	unsigned int bs[2];
	unsigned int min_bs[2];
	unsigned int max_bs[2];
	unsigned int rw_min_bs;
	unsigned int thinktime;
	unsigned int fsync_blocks;
	unsigned int start_delay;
	unsigned long timeout;
	unsigned int overwrite;
	unsigned int bw_avg_time;
	unsigned int loops;
	unsigned long long zone_size;
	unsigned long long zone_skip;
	enum fio_memtype mem_type;
	unsigned int stonewall;
	unsigned int numjobs;
	unsigned int iodepth;
	os_cpu_mask_t cpumask;
	unsigned int iolog;
	unsigned int read_iolog;
	unsigned int rwmixcycle;
	unsigned int rwmixread;
	unsigned int rwmixwrite;
	unsigned int nice;

	char *read_iolog_file;
	char *write_iolog_file;
	void *iolog_buf;
	FILE *iolog_f;

	char *sysfs_root;
	char *ioscheduler;

	os_random_state_t bsrange_state;
	os_random_state_t verify_state;

	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;

	/*
	 * Current IO depth and list of free and busy io_u's.
	 */
	unsigned int cur_depth;
	struct list_head io_u_freelist;
	struct list_head io_u_busylist;

	/*
	 * Rate state
	 */
	unsigned int rate;
	unsigned int ratemin;
	unsigned int ratecycle;
	unsigned long rate_usec_cycle;
	long rate_pending_usleep;
	unsigned long rate_bytes;
	struct timeval lastrate;

	unsigned long runtime[2];		/* msec */
	unsigned long long io_size;
	unsigned long long total_file_size;
	unsigned long long start_offset;
	unsigned long long total_io_size;

	unsigned long long io_blocks[2];
	unsigned long long io_bytes[2];
	unsigned long long zone_bytes;
	unsigned long long this_io_bytes[2];
	volatile int mutex;

	/*
	 * State for random io, a bitmap of blocks done vs not done
	 */
	os_random_state_t random_state;

	/*
	 * CPU "io" cycle burner
	 */
	unsigned int cpuload;
	unsigned int cpucycle;

	/*
	 * bandwidth and latency stats
	 */
	struct io_stat clat_stat[2];		/* completion latency */
	struct io_stat slat_stat[2];		/* submission latency */
	struct io_stat bw_stat[2];		/* bandwidth stats */

	unsigned long long stat_io_bytes[2];
	struct timeval stat_sample_time[2];

	struct io_log *slat_log;
	struct io_log *clat_log;
	struct io_log *bw_log;

	struct timeval start;	/* start of this loop */
	struct timeval epoch;	/* time job was started */
	struct timeval end_time;/* time job ended */

	/*
	 * fio system usage accounting
	 */
	struct rusage ru_start;
	struct rusage ru_end;
	unsigned long usr_time;
	unsigned long sys_time;
	unsigned long ctx;

	/*
	 * read/write mixed workload state
	 */
	os_random_state_t rwmix_state;
	struct timeval rwmix_switch;
	enum fio_ddir rwmix_ddir;

	/*
	 * Pre-run and post-run shell
	 */
	char *exec_prerun;
	char *exec_postrun;

	/*
	 * IO historic logs
	 */
	struct list_head io_hist_list;
	struct list_head io_log_list;
};

#define __td_verror(td, err, msg)					\
	do {								\
		int e = (err);						\
		(td)->error = e;					\
		snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, error=%s", __FILE__, __LINE__, (msg));	\
	} while (0)


#define td_verror(td, err)	__td_verror((td), (err), strerror((err)))
#define td_vmsg(td, err, msg)	__td_verror((td), (err), (msg))

extern int exitall_on_terminate;
extern int thread_number;
extern int shm_id;
extern int groupid;
extern int terse_output;
extern FILE *f_out;
extern FILE *f_err;
extern int temp_stall_ts;
extern unsigned long long mlock_size;

extern struct thread_data *threads;

#define td_read(td)		((td)->ddir == DDIR_READ)
#define td_write(td)		((td)->ddir == DDIR_WRITE)
#define td_rw(td)		((td)->iomix != 0)

#define BLOCKS_PER_MAP		(8 * sizeof(long))
#define TO_MAP_BLOCK(td, f, b)	((b) - ((f)->file_offset / (td)->rw_min_bs))
#define RAND_MAP_IDX(td, f, b)	(TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
#define RAND_MAP_BIT(td, f, b)	(TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))

#define MAX_JOBS	(1024)

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

	return 0;
}

struct disk_util_stat {
	unsigned ios[2];
	unsigned merges[2];
	unsigned long long sectors[2];
	unsigned ticks[2];
	unsigned io_ticks;
	unsigned time_in_queue;
};

struct disk_util {
	struct list_head list;

	char *name;
	char path[256];
	dev_t dev;

	struct disk_util_stat dus;
	struct disk_util_stat last_dus;

	unsigned long msec;
	struct timeval time;
};

struct io_completion_data {
	int nr;				/* input */

	int error;			/* output */
	unsigned long bytes_done[2];	/* output */
	struct timeval time;		/* output */
};

#define DISK_UTIL_MSEC	(250)

#ifndef min
#define min(a, b)	((a) < (b) ? (a) : (b))
#endif
#ifndef max
#define max(a, b)	((a) > (b) ? (a) : (b))
#endif

/*
 * Log exports
 */
extern int read_iolog_get(struct thread_data *, struct io_u *);
extern void write_iolog_put(struct thread_data *, struct io_u *);
extern int init_iolog(struct thread_data *td);
extern void log_io_piece(struct thread_data *, struct io_u *);
extern void prune_io_piece_log(struct thread_data *);
extern void write_iolog_close(struct thread_data *);

/*
 * Logging
 */
extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
extern void add_bw_sample(struct thread_data *, enum fio_ddir, struct timeval *);
extern void show_run_stats(void);
extern void init_disk_util(struct thread_data *);
extern void update_rusage_stat(struct thread_data *);
extern void update_io_ticks(void);
extern void disk_util_timer_arm(void);
extern void setup_log(struct io_log **);
extern void finish_log(struct thread_data *, struct io_log *, const char *);
extern int setup_rate(struct thread_data *);

/*
 * Time functions
 */
extern unsigned long utime_since(struct timeval *, struct timeval *);
extern unsigned long utime_since_now(struct timeval *);
extern unsigned long mtime_since(struct timeval *, struct timeval *);
extern unsigned long mtime_since_now(struct timeval *);
extern unsigned long time_since_now(struct timeval *);
extern unsigned long mtime_since_genesis(void);
extern void __usec_sleep(unsigned int);
extern void usec_sleep(struct thread_data *, unsigned long);
extern void rate_throttle(struct thread_data *, unsigned long, unsigned int, int);
extern void fill_start_time(struct timeval *);
extern void fio_gettime(struct timeval *, void *);

/*
 * Init functions
 */
extern int parse_options(int, char **);
extern int init_random_state(struct thread_data *);

/*
 * File setup/shutdown
 */
extern void close_files(struct thread_data *);
extern int setup_files(struct thread_data *);
extern int open_files(struct thread_data *);
extern int file_invalidate_cache(struct thread_data *, struct fio_file *);

/*
 * ETA/status stuff
 */
extern void print_thread_status(void);
extern void print_status_init(int);

/*
 * 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_RUNNING,
	TD_VERIFYING,
	TD_FSYNCING,
	TD_EXITED,
	TD_REAPED,
};

/*
 * Verify helpers
 */
extern void populate_verify_io_u(struct thread_data *, struct io_u *);
extern int get_next_verify(struct thread_data *td, struct io_u *);
extern int do_io_u_verify(struct thread_data *, struct io_u **);

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

/*
 * io unit handling
 */
#define queue_full(td)	list_empty(&(td)->io_u_freelist)
extern struct io_u *__get_io_u(struct thread_data *);
extern struct io_u *get_io_u(struct thread_data *, struct fio_file *);
extern void put_io_u(struct thread_data *, struct io_u *);
extern void ios_completed(struct thread_data *, struct io_completion_data *);
extern void io_completed(struct thread_data *, struct io_u *, struct io_completion_data *);

/*
 * io engine entry points
 */
extern int td_io_init(struct thread_data *);
extern int td_io_prep(struct thread_data *, struct io_u *);
extern int td_io_queue(struct thread_data *, struct io_u *);
extern int td_io_sync(struct thread_data *, struct fio_file *);
extern int td_io_getevents(struct thread_data *, int, int, struct timespec *);

/*
 * This is a pretty crappy semaphore implementation, but with the use that fio
 * has (just signalling start/go conditions), it doesn't have to be better.
 * Naturally this would not work for any type of contended semaphore or
 * for real locking.
 */
static inline void fio_sem_init(volatile int *sem, int val)
{
	*sem = val;
}

static inline void fio_sem_down(volatile int *sem)
{
	while (*sem == 0)
		usleep(10000);

	(*sem)--;
}

static inline void fio_sem_up(volatile int *sem)
{
	(*sem)++;
}

/*
 * If logging output to a file, stderr should go to both stderr and f_err
 */
#define log_err(args...)	do {		\
	fprintf(f_err, ##args);			\
	if (f_err != stderr)			\
		fprintf(stderr, ##args);	\
	} while (0)

struct ioengine_ops {
	struct list_head list;
	char name[16];
	int version;
	int flags;
	int (*setup)(struct thread_data *);
	int (*init)(struct thread_data *);
	int (*prep)(struct thread_data *, struct io_u *);
	int (*queue)(struct thread_data *, struct io_u *);
	int (*getevents)(struct thread_data *, int, int, struct timespec *);
	struct io_u *(*event)(struct thread_data *, int);
	int (*cancel)(struct thread_data *, struct io_u *);
	void (*cleanup)(struct thread_data *);
	void *data;
	void *dlhandle;
};

#define FIO_IOOPS_VERSION	3

extern struct ioengine_ops *load_ioengine(struct thread_data *, const char *);
extern int register_ioengine(struct ioengine_ops *);
extern void unregister_ioengine(struct ioengine_ops *);
extern void close_ioengine(struct thread_data *);

/*
 * Mark unused variables passed to ops functions as unused, to silence gcc
 */
#define fio_unused	__attribute((__unused__))
#define fio_init	__attribute__((constructor))
#define fio_exit	__attribute__((destructor))

#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)	\
	for ((i) = 0, (f) = &(td)->files[0]; (i) < (int) (td)->nr_files; (i)++, (f)++)

#endif
Commit	Line	Data
ebac4655 JA	1	#ifndef FIO_H
	2	#define FIO_H
	3
	4	#include <sched.h>
	5	#include <limits.h>
	6	#include <pthread.h>
	7	#include <sys/time.h>
	8	#include <sys/resource.h>
3c39a379 JA	9	#include <errno.h>
	10	#include <stdlib.h>
	11	#include <stdio.h>
6d6f031f	12	#include <unistd.h>
34cfcdaf	13	#include <string.h>
ebac4655 JA	14
	15	#include "list.h"
	16	#include "md5.h"
	17	#include "crc32.h"
	18	#include "arch.h"
	19	#include "os.h"
	20
1e97cce9 JA	21	enum fio_ddir {
	22	DDIR_READ = 0,
	23	DDIR_WRITE,
	24	DDIR_SYNC,
	25	};
	26
ebac4655 JA	27	struct io_stat {
	28	unsigned long val;
	29	unsigned long val_sq;
	30	unsigned long max_val;
	31	unsigned long min_val;
	32	unsigned long samples;
	33	};
	34
	35	struct io_sample {
	36	unsigned long time;
	37	unsigned long val;
1e97cce9	38	enum fio_ddir ddir;
ebac4655 JA	39	};
	40
	41	struct io_log {
	42	unsigned long nr_samples;
	43	unsigned long max_samples;
	44	struct io_sample *log;
	45	};
	46
	47	struct io_piece {
	48	struct list_head list;
53cdc686	49	struct fio_file *file;
ebac4655 JA	50	unsigned long long offset;
ebac4655 JA	51	unsigned int len;
1e97cce9	52	enum fio_ddir ddir;
ebac4655 JA	53	};
	54
	55	/*
	56	* The io unit
	57	*/
	58	struct io_u {
	59	union {
	60	#ifdef FIO_HAVE_LIBAIO
	61	struct iocb iocb;
	62	#endif
	63	#ifdef FIO_HAVE_POSIXAIO
	64	struct aiocb aiocb;
	65	#endif
	66	#ifdef FIO_HAVE_SGIO
	67	struct sg_io_hdr hdr;
	68	#endif
	69	};
	70	struct timeval start_time;
	71	struct timeval issue_time;
	72
6b9cea23	73	void *buf;
ebac4655 JA	74	unsigned int buflen;
	75	unsigned long long offset;
	76
	77	unsigned int resid;
	78	unsigned int error;
	79
1e97cce9	80	enum fio_ddir ddir;
ebac4655	81
dfd7bc2c JA	82	/*
	83	* io engine private data
	84	*/
	85	union {
	86	unsigned int index;
	87	unsigned int seen;
	88	};
	89
53cdc686 JA	90	struct fio_file *file;
53cdc686 JA	91
ebac4655 JA	92	struct list_head list;
	93	};
	94
	95	#define FIO_HDR_MAGIC 0xf00baaef
	96
	97	enum {
	98	VERIFY_NONE = 0,
	99	VERIFY_MD5,
	100	VERIFY_CRC32,
	101	};
	102
	103	struct verify_header {
	104	unsigned int fio_magic;
	105	unsigned int len;
	106	unsigned int verify_type;
	107	union {
	108	char md5_digest[MD5_HASH_WORDS * 4];
	109	unsigned long crc32;
	110	};
	111	};
	112
	113	struct group_run_stats {
9104f874 JA	114	unsigned long long max_run[2], min_run[2];
9104f874 JA	115	unsigned long long max_bw[2], min_bw[2];
e9b2a3fa	116	unsigned long long io_kb[2];
9104f874	117	unsigned long long agg[2];
ebac4655 JA	118	};
ebac4655 JA	119
e9c047a0 JA	120	/*
	121	* What type of allocation to use for io buffers
	122	*/
	123	enum fio_memtype {
	124	MEM_MALLOC = 0, /* ordinary malloc */
	125	MEM_SHM, /* use shared memory segments */
74b025b0	126	MEM_SHMHUGE, /* use shared memory segments with huge pages */
e9c047a0 JA	127	MEM_MMAP, /* use anonynomous mmap */
	128	};
	129
	130	/*
	131	* The type of object we are working on
	132	*/
	133	enum fio_filetype {
	134	FIO_TYPE_FILE = 1,
	135	FIO_TYPE_BD,
	136	FIO_TYPE_CHAR,
	137	};
	138
2866c82d	139	enum fio_ioengine_flags {
e9c047a0	140	FIO_SYNCIO = 1 << 0,
2866c82d JA	141	FIO_CPUIO = 1 << 1,
2866c82d JA	142	FIO_MMAPIO = 1 << 2,
b2a15192	143	FIO_RAWIO = 1 << 3,
e9c047a0 JA	144	};
e9c047a0 JA	145
53cdc686 JA	146	struct fio_file {
	147	/*
	148	* A file may not be a file descriptor, let the io engine decide
	149	*/
	150	union {
	151	unsigned long file_data;
	152	int fd;
	153	};
	154	char *file_name;
	155	void *mmap;
	156	unsigned long long file_size;
	157	unsigned long long real_file_size;
	158	unsigned long long file_offset;
	159	unsigned long long last_pos;
02bcaa8c	160	unsigned long long last_completed_pos;
53cdc686 JA	161
	162	unsigned long *file_map;
	163	unsigned int num_maps;
9b031dc8 JA	164
9b031dc8 JA	165	unsigned int unlink;
53cdc686 JA	166	};
53cdc686 JA	167
e9c047a0 JA	168	/*
	169	* This describes a single thread/process executing a fio job.
	170	*/
ebac4655	171	struct thread_data {
b4692828	172	char *name;
ef899b63	173	char *directory;
13f8e2d2	174	char *filename;
ebac4655 JA	175	char verror[80];
	176	pthread_t thread;
	177	int thread_number;
	178	int groupid;
e9c047a0	179	enum fio_filetype filetype;
53cdc686 JA	180	struct fio_file *files;
53cdc686 JA	181	unsigned int nr_files;
13f8e2d2	182	unsigned int nr_uniq_files;
53cdc686	183	unsigned int next_file;
ebac4655	184	int error;
ebac4655 JA	185	pid_t pid;
	186	char *orig_buffer;
	187	size_t orig_buffer_size;
	188	volatile int terminate;
	189	volatile int runstate;
e9c047a0	190	enum fio_ddir ddir;
3d60d1ed	191	unsigned int iomix;
ebac4655	192	unsigned int ioprio;
87dc1ab1	193	unsigned int last_was_sync;
e9c047a0	194
9158d2f7 JA	195	unsigned int sequential;
	196	unsigned int odirect;
	197	unsigned int invalidate_cache;
	198	unsigned int create_serialize;
	199	unsigned int create_fsync;
	200	unsigned int end_fsync;
	201	unsigned int sync_io;
	202	unsigned int verify;
	203	unsigned int use_thread;
	204	unsigned int unlink;
	205	unsigned int do_disk_util;
	206	unsigned int override_sync;
	207	unsigned int rand_repeatable;
	208	unsigned int write_lat_log;
	209	unsigned int write_bw_log;
bb8895e0	210	unsigned int norandommap;
690adba3	211	unsigned int bs_unaligned;
e9c047a0	212
a00735e6 JA	213	unsigned int bs[2];
	214	unsigned int min_bs[2];
	215	unsigned int max_bs[2];
	216	unsigned int rw_min_bs;
ebac4655 JA	217	unsigned int thinktime;
	218	unsigned int fsync_blocks;
	219	unsigned int start_delay;
906c8d75	220	unsigned long timeout;
ebac4655	221	unsigned int overwrite;
ebac4655	222	unsigned int bw_avg_time;
ebac4655	223	unsigned int loops;
20dc95c4 JA	224	unsigned long long zone_size;
20dc95c4 JA	225	unsigned long long zone_skip;
e9c047a0	226	enum fio_memtype mem_type;
ebac4655 JA	227	unsigned int stonewall;
ebac4655 JA	228	unsigned int numjobs;
ebac4655 JA	229	unsigned int iodepth;
ebac4655 JA	230	os_cpu_mask_t cpumask;
aea47d44	231	unsigned int iolog;
843a7413	232	unsigned int read_iolog;
a6ccc7be JA	233	unsigned int rwmixcycle;
a6ccc7be JA	234	unsigned int rwmixread;
e1f36503	235	unsigned int rwmixwrite;
b6f4d880	236	unsigned int nice;
aea47d44	237
076efc7c JA	238	char *read_iolog_file;
076efc7c JA	239	char *write_iolog_file;
843a7413 JA	240	void *iolog_buf;
843a7413 JA	241	FILE *iolog_f;
ebac4655	242
da86774e	243	char *sysfs_root;
da86774e JA	244	char *ioscheduler;
da86774e JA	245
6dfd46b9 JA	246	os_random_state_t bsrange_state;
6dfd46b9 JA	247	os_random_state_t verify_state;
ebac4655 JA	248
	249	int shm_id;
	250
e9c047a0 JA	251	/*
	252	* IO engine hooks, contains everything needed to submit an io_u
	253	* to any of the available IO engines.
	254	*/
2866c82d	255	struct ioengine_ops *io_ops;
ebac4655	256
e9c047a0 JA	257	/*
	258	* Current IO depth and list of free and busy io_u's.
	259	*/
ebac4655 JA	260	unsigned int cur_depth;
	261	struct list_head io_u_freelist;
	262	struct list_head io_u_busylist;
	263
e9c047a0 JA	264	/*
	265	* Rate state
	266	*/
ebac4655 JA	267	unsigned int rate;
	268	unsigned int ratemin;
	269	unsigned int ratecycle;
	270	unsigned long rate_usec_cycle;
	271	long rate_pending_usleep;
	272	unsigned long rate_bytes;
	273	struct timeval lastrate;
	274
	275	unsigned long runtime[2]; /* msec */
	276	unsigned long long io_size;
53cdc686 JA	277	unsigned long long total_file_size;
53cdc686 JA	278	unsigned long long start_offset;
ebac4655 JA	279	unsigned long long total_io_size;
ebac4655 JA	280
9104f874 JA	281	unsigned long long io_blocks[2];
	282	unsigned long long io_bytes[2];
	283	unsigned long long zone_bytes;
	284	unsigned long long this_io_bytes[2];
bbfd6b00	285	volatile int mutex;
ebac4655	286
e9c047a0 JA	287	/*
	288	* State for random io, a bitmap of blocks done vs not done
	289	*/
6dfd46b9	290	os_random_state_t random_state;
ebac4655	291
b990b5c0 JA	292	/*
	293	* CPU "io" cycle burner
	294	*/
	295	unsigned int cpuload;
	296	unsigned int cpucycle;
	297
ebac4655 JA	298	/*
	299	* bandwidth and latency stats
	300	*/
	301	struct io_stat clat_stat[2]; /* completion latency */
	302	struct io_stat slat_stat[2]; /* submission latency */
	303	struct io_stat bw_stat[2]; /* bandwidth stats */
	304
9104f874	305	unsigned long long stat_io_bytes[2];
ebac4655 JA	306	struct timeval stat_sample_time[2];
	307
	308	struct io_log *slat_log;
	309	struct io_log *clat_log;
	310	struct io_log *bw_log;
	311
	312	struct timeval start; /* start of this loop */
	313	struct timeval epoch; /* time job was started */
69008999	314	struct timeval end_time;/* time job ended */
ebac4655	315
e9c047a0 JA	316	/*
	317	* fio system usage accounting
	318	*/
ebac4655 JA	319	struct rusage ru_start;
	320	struct rusage ru_end;
	321	unsigned long usr_time;
	322	unsigned long sys_time;
	323	unsigned long ctx;
	324
e9c047a0 JA	325	/*
	326	* read/write mixed workload state
	327	*/
6dfd46b9	328	os_random_state_t rwmix_state;
a6ccc7be	329	struct timeval rwmix_switch;
e9c047a0	330	enum fio_ddir rwmix_ddir;
a6ccc7be	331
4e0ba8af JA	332	/*
	333	* Pre-run and post-run shell
	334	*/
	335	char *exec_prerun;
	336	char *exec_postrun;
	337
e9c047a0 JA	338	/*
	339	* IO historic logs
	340	*/
ebac4655	341	struct list_head io_hist_list;
aea47d44	342	struct list_head io_log_list;
ebac4655 JA	343	};
ebac4655 JA	344
b990b5c0	345	#define __td_verror(td, err, msg) \
ebac4655 JA	346	do { \
	347	int e = (err); \
	348	(td)->error = e; \
b990b5c0	349	snprintf(td->verror, sizeof(td->verror) - 1, "file:%s:%d, error=%s", __FILE__, __LINE__, (msg)); \
ebac4655 JA	350	} while (0)
ebac4655 JA	351
b990b5c0 JA	352
	353	#define td_verror(td, err) __td_verror((td), (err), strerror((err)))
	354	#define td_vmsg(td, err, msg) __td_verror((td), (err), (msg))
	355
ebac4655 JA	356	extern int exitall_on_terminate;
	357	extern int thread_number;
	358	extern int shm_id;
	359	extern int groupid;
c6ae0a5b	360	extern int terse_output;
eb8bbf48 JA	361	extern FILE *f_out;
eb8bbf48 JA	362	extern FILE *f_err;
53cdc686	363	extern int temp_stall_ts;
1e97cce9	364	extern unsigned long long mlock_size;
ebac4655 JA	365
	366	extern struct thread_data *threads;
	367
ebac4655 JA	368	#define td_read(td) ((td)->ddir == DDIR_READ)
ebac4655 JA	369	#define td_write(td) ((td)->ddir == DDIR_WRITE)
3d60d1ed	370	#define td_rw(td) ((td)->iomix != 0)
ebac4655 JA	371
ebac4655 JA	372	#define BLOCKS_PER_MAP (8 * sizeof(long))
a00735e6	373	#define TO_MAP_BLOCK(td, f, b) ((b) - ((f)->file_offset / (td)->rw_min_bs))
53cdc686 JA	374	#define RAND_MAP_IDX(td, f, b) (TO_MAP_BLOCK(td, f, b) / BLOCKS_PER_MAP)
53cdc686 JA	375	#define RAND_MAP_BIT(td, f, b) (TO_MAP_BLOCK(td, f, b) & (BLOCKS_PER_MAP - 1))
ebac4655 JA	376
	377	#define MAX_JOBS (1024)
	378
87dc1ab1 JA	379	static inline int should_fsync(struct thread_data *td)
	380	{
	381	if (td->last_was_sync)
	382	return 0;
	383	if (td->odirect)
	384	return 0;
	385	if (td_write(td) \|\| td_rw(td) \|\| td->override_sync)
	386	return 1;
	387
	388	return 0;
	389	}
	390
ebac4655 JA	391	struct disk_util_stat {
	392	unsigned ios[2];
	393	unsigned merges[2];
	394	unsigned long long sectors[2];
	395	unsigned ticks[2];
	396	unsigned io_ticks;
	397	unsigned time_in_queue;
	398	};
	399
	400	struct disk_util {
	401	struct list_head list;
	402
	403	char *name;
	404	char path[256];
	405	dev_t dev;
	406
	407	struct disk_util_stat dus;
	408	struct disk_util_stat last_dus;
	409
	410	unsigned long msec;
	411	struct timeval time;
	412	};
	413
	414	struct io_completion_data {
	415	int nr; /* input */
	416
	417	int error; /* output */
	418	unsigned long bytes_done[2]; /* output */
02bcaa8c	419	struct timeval time; /* output */
ebac4655 JA	420	};
	421
	422	#define DISK_UTIL_MSEC (250)
	423
6a0106a0 JA	424	#ifndef min
	425	#define min(a, b) ((a) < (b) ? (a) : (b))
	426	#endif
a00735e6 JA	427	#ifndef max
	428	#define max(a, b) ((a) > (b) ? (a) : (b))
	429	#endif
6a0106a0	430
6796209a JA	431	/*
	432	* Log exports
	433	*/
	434	extern int read_iolog_get(struct thread_data , struct io_u );
	435	extern void write_iolog_put(struct thread_data , struct io_u );
	436	extern int init_iolog(struct thread_data *td);
	437	extern void log_io_piece(struct thread_data , struct io_u );
	438	extern void prune_io_piece_log(struct thread_data *);
	439	extern void write_iolog_close(struct thread_data *);
	440
	441	/*
	442	* Logging
	443	*/
1e97cce9 JA	444	extern void add_clat_sample(struct thread_data *, enum fio_ddir, unsigned long);
	445	extern void add_slat_sample(struct thread_data *, enum fio_ddir, unsigned long);
	446	extern void add_bw_sample(struct thread_data , enum fio_ddir, struct timeval );
6796209a JA	447	extern void show_run_stats(void);
	448	extern void init_disk_util(struct thread_data *);
	449	extern void update_rusage_stat(struct thread_data *);
	450	extern void update_io_ticks(void);
	451	extern void disk_util_timer_arm(void);
8914a9d8 JA	452	extern void setup_log(struct io_log **);
	453	extern void finish_log(struct thread_data , struct io_log , const char *);
	454	extern int setup_rate(struct thread_data *);
6796209a JA	455
	456	/*
	457	* Time functions
	458	*/
	459	extern unsigned long utime_since(struct timeval , struct timeval );
69008999	460	extern unsigned long utime_since_now(struct timeval *);
6796209a JA	461	extern unsigned long mtime_since(struct timeval , struct timeval );
	462	extern unsigned long mtime_since_now(struct timeval *);
	463	extern unsigned long time_since_now(struct timeval *);
263e529f	464	extern unsigned long mtime_since_genesis(void);
b990b5c0	465	extern void __usec_sleep(unsigned int);
6796209a	466	extern void usec_sleep(struct thread_data *, unsigned long);
a00735e6	467	extern void rate_throttle(struct thread_data *, unsigned long, unsigned int, int);
6043c579	468	extern void fill_start_time(struct timeval *);
02bcaa8c	469	extern void fio_gettime(struct timeval , void );
6796209a	470
8914a9d8 JA	471	/*
	472	* Init functions
	473	*/
	474	extern int parse_options(int, char **);
	475	extern int init_random_state(struct thread_data *);
	476
53cdc686 JA	477	/*
	478	* File setup/shutdown
	479	*/
	480	extern void close_files(struct thread_data *);
	481	extern int setup_files(struct thread_data *);
21972cde	482	extern int open_files(struct thread_data *);
e5b401d4	483	extern int file_invalidate_cache(struct thread_data , struct fio_file );
53cdc686	484
263e529f JA	485	/*
	486	* ETA/status stuff
	487	*/
	488	extern void print_thread_status(void);
	489	extern void print_status_init(int);
	490
	491	/*
	492	* Thread life cycle. Once a thread has a runstate beyond TD_INITIALIZED, it
	493	* will never back again. It may cycle between running/verififying/fsyncing.
	494	* Once the thread reaches TD_EXITED, it is just waiting for the core to
	495	* reap it.
	496	*/
	497	enum {
	498	TD_NOT_CREATED = 0,
	499	TD_CREATED,
	500	TD_INITIALIZED,
	501	TD_RUNNING,
	502	TD_VERIFYING,
	503	TD_FSYNCING,
	504	TD_EXITED,
	505	TD_REAPED,
	506	};
	507
e29d1b70 JA	508	/*
	509	* Verify helpers
	510	*/
	511	extern void populate_verify_io_u(struct thread_data , struct io_u );
	512	extern int get_next_verify(struct thread_data td, struct io_u );
a9619d44	513	extern int do_io_u_verify(struct thread_data , struct io_u *);
e29d1b70	514
2f9ade3c JA	515	/*
	516	* Memory helpers
	517	*/
	518	extern int fio_pin_memory(void);
	519	extern void fio_unpin_memory(void);
	520	extern int allocate_io_mem(struct thread_data *);
	521	extern void free_io_mem(struct thread_data *);
	522
10ba535a JA	523	/*
	524	* io unit handling
	525	*/
	526	#define queue_full(td) list_empty(&(td)->io_u_freelist)
	527	extern struct io_u __get_io_u(struct thread_data );
	528	extern struct io_u get_io_u(struct thread_data , struct fio_file *);
	529	extern void put_io_u(struct thread_data , struct io_u );
	530	extern void ios_completed(struct thread_data , struct io_completion_data );
	531	extern void io_completed(struct thread_data , struct io_u , struct io_completion_data *);
	532
	533	/*
	534	* io engine entry points
	535	*/
8c16d840	536	extern int td_io_init(struct thread_data *);
10ba535a JA	537	extern int td_io_prep(struct thread_data , struct io_u );
	538	extern int td_io_queue(struct thread_data , struct io_u );
	539	extern int td_io_sync(struct thread_data , struct fio_file );
	540	extern int td_io_getevents(struct thread_data , int, int, struct timespec );
	541
bbfd6b00 JA	542	/*
	543	* This is a pretty crappy semaphore implementation, but with the use that fio
	544	* has (just signalling start/go conditions), it doesn't have to be better.
	545	* Naturally this would not work for any type of contended semaphore or
	546	* for real locking.
	547	*/
1056eaad	548	static inline void fio_sem_init(volatile int *sem, int val)
bbfd6b00 JA	549	{
	550	*sem = val;
	551	}
	552
1056eaad	553	static inline void fio_sem_down(volatile int *sem)
bbfd6b00 JA	554	{
	555	while (*sem == 0)
	556	usleep(10000);
	557
	558	(*sem)--;
	559	}
	560
1056eaad	561	static inline void fio_sem_up(volatile int *sem)
bbfd6b00 JA	562	{
	563	(*sem)++;
	564	}
	565
3b70d7e5 JA	566	/*
	567	* If logging output to a file, stderr should go to both stderr and f_err
	568	*/
	569	#define log_err(args...) do { \
	570	fprintf(f_err, ##args); \
	571	if (f_err != stderr) \
	572	fprintf(stderr, ##args); \
	573	} while (0)
	574
2866c82d	575	struct ioengine_ops {
5f350952	576	struct list_head list;
2866c82d JA	577	char name[16];
	578	int version;
	579	int flags;
ea2877a4	580	int (setup)(struct thread_data );
2866c82d JA	581	int (init)(struct thread_data );
	582	int (prep)(struct thread_data , struct io_u *);
	583	int (queue)(struct thread_data , struct io_u *);
	584	int (getevents)(struct thread_data , int, int, struct timespec *);
	585	struct io_u (event)(struct thread_data *, int);
	586	int (cancel)(struct thread_data , struct io_u *);
	587	void (cleanup)(struct thread_data );
2866c82d JA	588	void *data;
	589	void *dlhandle;
	590	};
	591
87dc1ab1	592	#define FIO_IOOPS_VERSION 3
2866c82d	593
b4692828	594	extern struct ioengine_ops load_ioengine(struct thread_data , const char *);
5f350952 JA	595	extern int register_ioengine(struct ioengine_ops *);
5f350952 JA	596	extern void unregister_ioengine(struct ioengine_ops *);
2866c82d JA	597	extern void close_ioengine(struct thread_data *);
	598
	599	/*
	600	* Mark unused variables passed to ops functions as unused, to silence gcc
	601	*/
	602	#define fio_unused __attribute((__unused__))
5f350952 JA	603	#define fio_init __attribute__((constructor))
5f350952 JA	604	#define fio_exit __attribute__((destructor))
2866c82d	605
34572e28 JA	606	#define for_each_td(td, i) \
34572e28 JA	607	for ((i) = 0, (td) = &threads[0]; (i) < (int) thread_number; (i)++, (td)++)
53cdc686	608	#define for_each_file(td, f, i) \
34572e28	609	for ((i) = 0, (f) = &(td)->files[0]; (i) < (int) (td)->nr_files; (i)++, (f)++)
53cdc686	610
ebac4655	611	#endif