[fio.git] / stat.h

#ifndef FIO_STAT_H
#define FIO_STAT_H

#include "iolog.h"

struct group_run_stats {
	uint64_t max_run[DDIR_RWDIR_CNT], min_run[DDIR_RWDIR_CNT];
	uint64_t max_bw[DDIR_RWDIR_CNT], min_bw[DDIR_RWDIR_CNT];
	uint64_t io_kb[DDIR_RWDIR_CNT];
	uint64_t agg[DDIR_RWDIR_CNT];
	uint32_t kb_base;
	uint32_t groupid;
	uint32_t unified_rw_rep;
};

/*
 * How many depth levels to log
 */
#define FIO_IO_U_MAP_NR	7
#define FIO_IO_U_LAT_U_NR 10
#define FIO_IO_U_LAT_M_NR 12

/*
 * Aggregate clat samples to report percentile(s) of them.
 *
 * EXECUTIVE SUMMARY
 *
 * FIO_IO_U_PLAT_BITS determines the maximum statistical error on the
 * value of resulting percentiles. The error will be approximately
 * 1/2^(FIO_IO_U_PLAT_BITS+1) of the value.
 *
 * FIO_IO_U_PLAT_GROUP_NR and FIO_IO_U_PLAT_BITS determine the maximum
 * range being tracked for latency samples. The maximum value tracked
 * accurately will be 2^(GROUP_NR + PLAT_BITS -1) microseconds.
 *
 * FIO_IO_U_PLAT_GROUP_NR and FIO_IO_U_PLAT_BITS determine the memory
 * requirement of storing those aggregate counts. The memory used will
 * be (FIO_IO_U_PLAT_GROUP_NR * 2^FIO_IO_U_PLAT_BITS) * sizeof(int)
 * bytes.
 *
 * FIO_IO_U_PLAT_NR is the total number of buckets.
 *
 * DETAILS
 *
 * Suppose the clat varies from 0 to 999 (usec), the straightforward
 * method is to keep an array of (999 + 1) buckets, in which a counter
 * keeps the count of samples which fall in the bucket, e.g.,
 * {[0],[1],...,[999]}. However this consumes a huge amount of space,
 * and can be avoided if an approximation is acceptable.
 *
 * One such method is to let the range of the bucket to be greater
 * than one. This method has low accuracy when the value is small. For
 * example, let the buckets be {[0,99],[100,199],...,[900,999]}, and
 * the represented value of each bucket be the mean of the range. Then
 * a value 0 has an round-off error of 49.5. To improve on this, we
 * use buckets with non-uniform ranges, while bounding the error of
 * each bucket within a ratio of the sample value. A simple example
 * would be when error_bound = 0.005, buckets are {
 * {[0],[1],...,[99]}, {[100,101],[102,103],...,[198,199]},..,
 * {[900,909],[910,919]...}  }. The total range is partitioned into
 * groups with different ranges, then buckets with uniform ranges. An
 * upper bound of the error is (range_of_bucket/2)/value_of_bucket
 *
 * For better efficiency, we implement this using base two. We group
 * samples by their Most Significant Bit (MSB), extract the next M bit
 * of them as an index within the group, and discard the rest of the
 * bits.
 *
 * E.g., assume a sample 'x' whose MSB is bit n (starting from bit 0),
 * and use M bit for indexing
 *
 *        | n |    M bits   | bit (n-M-1) ... bit 0 |
 *
 * Because x is at least 2^n, and bit 0 to bit (n-M-1) is at most
 * (2^(n-M) - 1), discarding bit 0 to (n-M-1) makes the round-off
 * error
 *
 *           2^(n-M)-1    2^(n-M)    1
 *      e <= --------- <= ------- = ---
 *             2^n          2^n     2^M
 *
 * Furthermore, we use "mean" of the range to represent the bucket,
 * the error e can be lowered by half to 1 / 2^(M+1). By using M bits
 * as the index, each group must contains 2^M buckets.
 *
 * E.g. Let M (FIO_IO_U_PLAT_BITS) be 6
 *      Error bound is 1/2^(6+1) = 0.0078125 (< 1%)
 *
 *	Group	MSB	#discarded	range of		#buckets
 *			error_bits	value
 *	----------------------------------------------------------------
 *	0*	0~5	0		[0,63]			64
 *	1*	6	0		[64,127]		64
 *	2	7	1		[128,255]		64
 *	3	8	2		[256,511]		64
 *	4	9	3		[512,1023]		64
 *	...	...	...		[...,...]		...
 *	18	23	17		[8838608,+inf]**	64
 *
 *  * Special cases: when n < (M-1) or when n == (M-1), in both cases,
 *    the value cannot be rounded off. Use all bits of the sample as
 *    index.
 *
 *  ** If a sample's MSB is greater than 23, it will be counted as 23.
 */

#define FIO_IO_U_PLAT_BITS 6
#define FIO_IO_U_PLAT_VAL (1 << FIO_IO_U_PLAT_BITS)
#define FIO_IO_U_PLAT_GROUP_NR 19
#define FIO_IO_U_PLAT_NR (FIO_IO_U_PLAT_GROUP_NR * FIO_IO_U_PLAT_VAL)
#define FIO_IO_U_LIST_MAX_LEN 20 /* The size of the default and user-specified
					list of percentiles */

#define MAX_PATTERN_SIZE	512
#define FIO_JOBNAME_SIZE	128
#define FIO_VERROR_SIZE		128

struct thread_stat {
	char name[FIO_JOBNAME_SIZE];
	char verror[FIO_VERROR_SIZE];
	uint32_t error;
	uint32_t thread_number;
	uint32_t groupid;
	uint32_t pid;
	char description[FIO_JOBNAME_SIZE];
	uint32_t members;
	uint32_t unified_rw_rep;

	/*
	 * bandwidth and latency stats
	 */
	struct io_stat clat_stat[DDIR_RWDIR_CNT]; /* completion latency */
	struct io_stat slat_stat[DDIR_RWDIR_CNT]; /* submission latency */
	struct io_stat lat_stat[DDIR_RWDIR_CNT]; /* total latency */
	struct io_stat bw_stat[DDIR_RWDIR_CNT]; /* bandwidth stats */
	struct io_stat iops_stat[DDIR_RWDIR_CNT]; /* IOPS stats */

	/*
	 * fio system usage accounting
	 */
	uint64_t usr_time;
	uint64_t sys_time;
	uint64_t ctx;
	uint64_t minf, majf;

	/*
	 * IO depth and latency stats
	 */
	uint64_t clat_percentiles;
	uint64_t percentile_precision;
	fio_fp64_t percentile_list[FIO_IO_U_LIST_MAX_LEN];

	uint32_t io_u_map[FIO_IO_U_MAP_NR];
	uint32_t io_u_submit[FIO_IO_U_MAP_NR];
	uint32_t io_u_complete[FIO_IO_U_MAP_NR];
	uint32_t io_u_lat_u[FIO_IO_U_LAT_U_NR];
	uint32_t io_u_lat_m[FIO_IO_U_LAT_M_NR];
	uint32_t io_u_plat[DDIR_RWDIR_CNT][FIO_IO_U_PLAT_NR];
	uint64_t total_io_u[3];
	uint64_t short_io_u[3];
	uint64_t total_submit;
	uint64_t total_complete;

	uint64_t io_bytes[DDIR_RWDIR_CNT];
	uint64_t runtime[DDIR_RWDIR_CNT];
	uint64_t total_run_time;

	/*
	 * IO Error related stats
	 */
	uint16_t continue_on_error;
	uint64_t total_err_count;
	uint32_t first_error;

	uint32_t kb_base;
};

struct jobs_eta {
	uint32_t nr_running;
	uint32_t nr_ramp;
	uint32_t nr_pending;
	uint32_t files_open;
	uint32_t m_rate[DDIR_RWDIR_CNT], t_rate[DDIR_RWDIR_CNT];
	uint32_t m_iops[DDIR_RWDIR_CNT], t_iops[DDIR_RWDIR_CNT];
	uint32_t rate[DDIR_RWDIR_CNT];
	uint32_t iops[DDIR_RWDIR_CNT];
	uint64_t elapsed_sec;
	uint64_t eta_sec;
	uint32_t is_pow2;

	/*
	 * Network 'copy' of run_str[]
	 */
	uint32_t nr_threads;
	uint8_t run_str[];
};

extern void show_thread_status(struct thread_stat *ts, struct group_run_stats *rs);
extern void show_group_stats(struct group_run_stats *rs);
extern int calc_thread_status(struct jobs_eta *je, int force);
extern void display_thread_status(struct jobs_eta *je);
extern void show_run_stats(void);
extern void show_running_run_stats(void);
extern void sum_thread_stats(struct thread_stat *dst, struct thread_stat *src, int nr);
extern void sum_group_stats(struct group_run_stats *dst, struct group_run_stats *src);
extern void init_thread_stat(struct thread_stat *ts);
extern void init_group_run_stat(struct group_run_stats *gs);
extern void eta_to_str(char *str, unsigned long eta_sec);
extern int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max, double *mean, double *dev);
extern unsigned int calc_clat_percentiles(unsigned int *io_u_plat, unsigned long nr, fio_fp64_t *plist, unsigned int **output, unsigned int *maxv, unsigned int *minv);
extern void stat_calc_lat_m(struct thread_stat *ts, double *io_u_lat);
extern void stat_calc_lat_u(struct thread_stat *ts, double *io_u_lat);
extern void stat_calc_dist(unsigned int *map, unsigned long total, double *io_u_dist);

static inline int usec_to_msec(unsigned long *min, unsigned long *max,
			       double *mean, double *dev)
{
	if (*min > 1000 && *max > 1000 && *mean > 1000.0 && *dev > 1000.0) {
		*min /= 1000;
		*max /= 1000;
		*mean /= 1000.0;
		*dev /= 1000.0;
		return 0;
	}

	return 1;
}

#endif
Commit	Line	Data
a64e88da JA	1	#ifndef FIO_STAT_H
	2	#define FIO_STAT_H
	3
ec41265e JA	4	#include "iolog.h"
ec41265e JA	5
a64e88da	6	struct group_run_stats {
6eaf09d6 SL	7	uint64_t max_run[DDIR_RWDIR_CNT], min_run[DDIR_RWDIR_CNT];
	8	uint64_t max_bw[DDIR_RWDIR_CNT], min_bw[DDIR_RWDIR_CNT];
	9	uint64_t io_kb[DDIR_RWDIR_CNT];
	10	uint64_t agg[DDIR_RWDIR_CNT];
a64e88da JA	11	uint32_t kb_base;
a64e88da JA	12	uint32_t groupid;
771e58be	13	uint32_t unified_rw_rep;
a64e88da JA	14	};
	15
	16	/*
	17	* How many depth levels to log
	18	*/
	19	#define FIO_IO_U_MAP_NR 7
	20	#define FIO_IO_U_LAT_U_NR 10
	21	#define FIO_IO_U_LAT_M_NR 12
	22
	23	/*
	24	* Aggregate clat samples to report percentile(s) of them.
	25	*
	26	* EXECUTIVE SUMMARY
	27	*
	28	* FIO_IO_U_PLAT_BITS determines the maximum statistical error on the
	29	* value of resulting percentiles. The error will be approximately
	30	* 1/2^(FIO_IO_U_PLAT_BITS+1) of the value.
	31	*
	32	* FIO_IO_U_PLAT_GROUP_NR and FIO_IO_U_PLAT_BITS determine the maximum
	33	* range being tracked for latency samples. The maximum value tracked
	34	* accurately will be 2^(GROUP_NR + PLAT_BITS -1) microseconds.
	35	*
	36	* FIO_IO_U_PLAT_GROUP_NR and FIO_IO_U_PLAT_BITS determine the memory
	37	* requirement of storing those aggregate counts. The memory used will
	38	* be (FIO_IO_U_PLAT_GROUP_NR * 2^FIO_IO_U_PLAT_BITS) * sizeof(int)
	39	* bytes.
	40	*
	41	* FIO_IO_U_PLAT_NR is the total number of buckets.
	42	*
	43	* DETAILS
	44	*
	45	* Suppose the clat varies from 0 to 999 (usec), the straightforward
	46	* method is to keep an array of (999 + 1) buckets, in which a counter
	47	* keeps the count of samples which fall in the bucket, e.g.,
	48	* {[0],[1],...,[999]}. However this consumes a huge amount of space,
	49	* and can be avoided if an approximation is acceptable.
	50	*
	51	* One such method is to let the range of the bucket to be greater
	52	* than one. This method has low accuracy when the value is small. For
	53	* example, let the buckets be {[0,99],[100,199],...,[900,999]}, and
	54	* the represented value of each bucket be the mean of the range. Then
	55	* a value 0 has an round-off error of 49.5. To improve on this, we
	56	* use buckets with non-uniform ranges, while bounding the error of
	57	* each bucket within a ratio of the sample value. A simple example
	58	* would be when error_bound = 0.005, buckets are {
	59	* {[0],[1],...,[99]}, {[100,101],[102,103],...,[198,199]},..,
	60	* {[900,909],[910,919]...} }. The total range is partitioned into
	61	* groups with different ranges, then buckets with uniform ranges. An
	62	* upper bound of the error is (range_of_bucket/2)/value_of_bucket
	63	*
	64	* For better efficiency, we implement this using base two. We group
	65	* samples by their Most Significant Bit (MSB), extract the next M bit
	66	* of them as an index within the group, and discard the rest of the
	67	* bits.
	68	*
	69	* E.g., assume a sample 'x' whose MSB is bit n (starting from bit 0),
	70	* and use M bit for indexing
	71	*
	72	* \| n \| M bits \| bit (n-M-1) ... bit 0 \|
	73	*
	74	* Because x is at least 2^n, and bit 0 to bit (n-M-1) is at most
	75	* (2^(n-M) - 1), discarding bit 0 to (n-M-1) makes the round-off
	76	* error
	77	*
78	* 2^(n-M)-1 2^(n-M) 1
79	* e <= --------- <= ------- = ---
80	* 2^n 2^n 2^M
81	*
82	* Furthermore, we use "mean" of the range to represent the bucket,
83	* the error e can be lowered by half to 1 / 2^(M+1). By using M bits
84	* as the index, each group must contains 2^M buckets.
85	*
86	* E.g. Let M (FIO_IO_U_PLAT_BITS) be 6
87	* Error bound is 1/2^(6+1) = 0.0078125 (< 1%)
88	*
89	* Group MSB #discarded range of #buckets
90	* error_bits value
91	* ----------------------------------------------------------------
92	* 0* 0~5 0 [0,63] 64
93	* 1* 6 0 [64,127] 64
94	* 2 7 1 [128,255] 64
95	* 3 8 2 [256,511] 64
96	* 4 9 3 [512,1023] 64
97	* ... ... ... [...,...] ...
98	* 18 23 17 [8838608,+inf]** 64
99	*
100	* * Special cases: when n < (M-1) or when n == (M-1), in both cases,
101	* the value cannot be rounded off. Use all bits of the sample as
102	* index.
103	*
104	* ** If a sample's MSB is greater than 23, it will be counted as 23.
105	*/
106
107	#define FIO_IO_U_PLAT_BITS 6
108	#define FIO_IO_U_PLAT_VAL (1 << FIO_IO_U_PLAT_BITS)
109	#define FIO_IO_U_PLAT_GROUP_NR 19
110	#define FIO_IO_U_PLAT_NR (FIO_IO_U_PLAT_GROUP_NR * FIO_IO_U_PLAT_VAL)
111	#define FIO_IO_U_LIST_MAX_LEN 20 /* The size of the default and user-specified
112	list of percentiles */
113
114	#define MAX_PATTERN_SIZE 512
115	#define FIO_JOBNAME_SIZE 128
116	#define FIO_VERROR_SIZE 128
117
118	struct thread_stat {
119	char name[FIO_JOBNAME_SIZE];
120	char verror[FIO_VERROR_SIZE];
ddcc0b69	121	uint32_t error;
2f122b13	122	uint32_t thread_number;
ddcc0b69	123	uint32_t groupid;
a64e88da JA	124	uint32_t pid;
	125	char description[FIO_JOBNAME_SIZE];
	126	uint32_t members;
771e58be	127	uint32_t unified_rw_rep;
a64e88da JA	128
	129	/*
	130	* bandwidth and latency stats
	131	*/
6eaf09d6 SL	132	struct io_stat clat_stat[DDIR_RWDIR_CNT]; /* completion latency */
	133	struct io_stat slat_stat[DDIR_RWDIR_CNT]; /* submission latency */
	134	struct io_stat lat_stat[DDIR_RWDIR_CNT]; /* total latency */
	135	struct io_stat bw_stat[DDIR_RWDIR_CNT]; /* bandwidth stats */
	136	struct io_stat iops_stat[DDIR_RWDIR_CNT]; /* IOPS stats */
a64e88da JA	137
	138	/*
	139	* fio system usage accounting
	140	*/
	141	uint64_t usr_time;
	142	uint64_t sys_time;
	143	uint64_t ctx;
	144	uint64_t minf, majf;
	145
	146	/*
	147	* IO depth and latency stats
	148	*/
	149	uint64_t clat_percentiles;
435d195a	150	uint64_t percentile_precision;
802ad4a8	151	fio_fp64_t percentile_list[FIO_IO_U_LIST_MAX_LEN];
a64e88da JA	152
	153	uint32_t io_u_map[FIO_IO_U_MAP_NR];
	154	uint32_t io_u_submit[FIO_IO_U_MAP_NR];
	155	uint32_t io_u_complete[FIO_IO_U_MAP_NR];
	156	uint32_t io_u_lat_u[FIO_IO_U_LAT_U_NR];
	157	uint32_t io_u_lat_m[FIO_IO_U_LAT_M_NR];
6eaf09d6	158	uint32_t io_u_plat[DDIR_RWDIR_CNT][FIO_IO_U_PLAT_NR];
a64e88da JA	159	uint64_t total_io_u[3];
	160	uint64_t short_io_u[3];
	161	uint64_t total_submit;
	162	uint64_t total_complete;
	163
6eaf09d6 SL	164	uint64_t io_bytes[DDIR_RWDIR_CNT];
6eaf09d6 SL	165	uint64_t runtime[DDIR_RWDIR_CNT];
a64e88da JA	166	uint64_t total_run_time;
	167
	168	/*
	169	* IO Error related stats
	170	*/
	171	uint16_t continue_on_error;
	172	uint64_t total_err_count;
ddcc0b69	173	uint32_t first_error;
a64e88da JA	174
	175	uint32_t kb_base;
	176	};
	177
b75a394f JA	178	struct jobs_eta {
	179	uint32_t nr_running;
	180	uint32_t nr_ramp;
	181	uint32_t nr_pending;
	182	uint32_t files_open;
d79db122 JA	183	uint32_t m_rate[DDIR_RWDIR_CNT], t_rate[DDIR_RWDIR_CNT];
d79db122 JA	184	uint32_t m_iops[DDIR_RWDIR_CNT], t_iops[DDIR_RWDIR_CNT];
6eaf09d6 SL	185	uint32_t rate[DDIR_RWDIR_CNT];
6eaf09d6 SL	186	uint32_t iops[DDIR_RWDIR_CNT];
b75a394f JA	187	uint64_t elapsed_sec;
b75a394f JA	188	uint64_t eta_sec;
b7f05eb0	189	uint32_t is_pow2;
1d1f45ae JA	190
	191	/*
	192	* Network 'copy' of run_str[]
	193	*/
	194	uint32_t nr_threads;
372aecb9	195	uint8_t run_str[];
b75a394f JA	196	};
b75a394f JA	197
a64e88da JA	198	extern void show_thread_status(struct thread_stat ts, struct group_run_stats rs);
a64e88da JA	199	extern void show_group_stats(struct group_run_stats *rs);
af9c9fb3	200	extern int calc_thread_status(struct jobs_eta *je, int force);
cf451d1e	201	extern void display_thread_status(struct jobs_eta *je);
5b9babb7	202	extern void show_run_stats(void);
b852e7cf	203	extern void show_running_run_stats(void);
5b9babb7	204	extern void sum_thread_stats(struct thread_stat dst, struct thread_stat src, int nr);
37f0c1ae JA	205	extern void sum_group_stats(struct group_run_stats dst, struct group_run_stats src);
	206	extern void init_thread_stat(struct thread_stat *ts);
	207	extern void init_group_run_stat(struct group_run_stats *gs);
3e47bd25	208	extern void eta_to_str(char *str, unsigned long eta_sec);
b29ad562	209	extern int calc_lat(struct io_stat is, unsigned long min, unsigned long max, double mean, double *dev);
a269790c	210	extern unsigned int calc_clat_percentiles(unsigned int io_u_plat, unsigned long nr, fio_fp64_t plist, unsigned int *output, unsigned int maxv, unsigned int *minv);
e5bd1347 JA	211	extern void stat_calc_lat_m(struct thread_stat ts, double io_u_lat);
e5bd1347 JA	212	extern void stat_calc_lat_u(struct thread_stat ts, double io_u_lat);
2e33101f JA	213	extern void stat_calc_dist(unsigned int map, unsigned long total, double io_u_dist);
2e33101f JA	214
b29ad562 JA	215	static inline int usec_to_msec(unsigned long min, unsigned long max,
	216	double mean, double dev)
	217	{
	218	if (min > 1000 && max > 1000 && mean > 1000.0 && dev > 1000.0) {
	219	*min /= 1000;
	220	*max /= 1000;
	221	*mean /= 1000.0;
	222	*dev /= 1000.0;
	223	return 0;
	224	}
	225
	226	return 1;
	227	}
a64e88da JA	228
a64e88da JA	229	#endif