264 lines
8.3 KiB
C
264 lines
8.3 KiB
C
#ifndef FIO_STAT_H
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#define FIO_STAT_H
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#include "iolog.h"
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struct group_run_stats {
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uint64_t max_run[DDIR_RWDIR_CNT], min_run[DDIR_RWDIR_CNT];
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uint64_t max_bw[DDIR_RWDIR_CNT], min_bw[DDIR_RWDIR_CNT];
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uint64_t io_kb[DDIR_RWDIR_CNT];
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uint64_t agg[DDIR_RWDIR_CNT];
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uint32_t kb_base;
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uint32_t unit_base;
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uint32_t groupid;
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uint32_t unified_rw_rep;
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} __attribute__((packed));
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/*
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* How many depth levels to log
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*/
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#define FIO_IO_U_MAP_NR 7
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#define FIO_IO_U_LAT_U_NR 10
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#define FIO_IO_U_LAT_M_NR 12
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/*
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* Aggregate clat samples to report percentile(s) of them.
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*
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* EXECUTIVE SUMMARY
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*
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* FIO_IO_U_PLAT_BITS determines the maximum statistical error on the
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* value of resulting percentiles. The error will be approximately
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* 1/2^(FIO_IO_U_PLAT_BITS+1) of the value.
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*
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* FIO_IO_U_PLAT_GROUP_NR and FIO_IO_U_PLAT_BITS determine the maximum
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* range being tracked for latency samples. The maximum value tracked
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* accurately will be 2^(GROUP_NR + PLAT_BITS -1) microseconds.
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*
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* FIO_IO_U_PLAT_GROUP_NR and FIO_IO_U_PLAT_BITS determine the memory
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* requirement of storing those aggregate counts. The memory used will
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* be (FIO_IO_U_PLAT_GROUP_NR * 2^FIO_IO_U_PLAT_BITS) * sizeof(int)
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* bytes.
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*
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* FIO_IO_U_PLAT_NR is the total number of buckets.
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*
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* DETAILS
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*
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* Suppose the clat varies from 0 to 999 (usec), the straightforward
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* method is to keep an array of (999 + 1) buckets, in which a counter
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* keeps the count of samples which fall in the bucket, e.g.,
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* {[0],[1],...,[999]}. However this consumes a huge amount of space,
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* and can be avoided if an approximation is acceptable.
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*
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* One such method is to let the range of the bucket to be greater
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* than one. This method has low accuracy when the value is small. For
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* example, let the buckets be {[0,99],[100,199],...,[900,999]}, and
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* the represented value of each bucket be the mean of the range. Then
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* a value 0 has an round-off error of 49.5. To improve on this, we
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* use buckets with non-uniform ranges, while bounding the error of
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* each bucket within a ratio of the sample value. A simple example
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* would be when error_bound = 0.005, buckets are {
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* {[0],[1],...,[99]}, {[100,101],[102,103],...,[198,199]},..,
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* {[900,909],[910,919]...} }. The total range is partitioned into
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* groups with different ranges, then buckets with uniform ranges. An
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* upper bound of the error is (range_of_bucket/2)/value_of_bucket
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*
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* For better efficiency, we implement this using base two. We group
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* samples by their Most Significant Bit (MSB), extract the next M bit
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* of them as an index within the group, and discard the rest of the
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* bits.
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*
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* E.g., assume a sample 'x' whose MSB is bit n (starting from bit 0),
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* and use M bit for indexing
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*
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* | n | M bits | bit (n-M-1) ... bit 0 |
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*
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* Because x is at least 2^n, and bit 0 to bit (n-M-1) is at most
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* (2^(n-M) - 1), discarding bit 0 to (n-M-1) makes the round-off
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* error
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*
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* 2^(n-M)-1 2^(n-M) 1
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* e <= --------- <= ------- = ---
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* 2^n 2^n 2^M
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*
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* Furthermore, we use "mean" of the range to represent the bucket,
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* the error e can be lowered by half to 1 / 2^(M+1). By using M bits
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* as the index, each group must contains 2^M buckets.
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*
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* E.g. Let M (FIO_IO_U_PLAT_BITS) be 6
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* Error bound is 1/2^(6+1) = 0.0078125 (< 1%)
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*
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* Group MSB #discarded range of #buckets
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* error_bits value
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* ----------------------------------------------------------------
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* 0* 0~5 0 [0,63] 64
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* 1* 6 0 [64,127] 64
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* 2 7 1 [128,255] 64
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* 3 8 2 [256,511] 64
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* 4 9 3 [512,1023] 64
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* ... ... ... [...,...] ...
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* 18 23 17 [8838608,+inf]** 64
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*
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* * Special cases: when n < (M-1) or when n == (M-1), in both cases,
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* the value cannot be rounded off. Use all bits of the sample as
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* index.
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*
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* ** If a sample's MSB is greater than 23, it will be counted as 23.
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*/
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#define FIO_IO_U_PLAT_BITS 6
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#define FIO_IO_U_PLAT_VAL (1 << FIO_IO_U_PLAT_BITS)
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#define FIO_IO_U_PLAT_GROUP_NR 19
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#define FIO_IO_U_PLAT_NR (FIO_IO_U_PLAT_GROUP_NR * FIO_IO_U_PLAT_VAL)
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#define FIO_IO_U_LIST_MAX_LEN 20 /* The size of the default and user-specified
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list of percentiles */
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#define MAX_PATTERN_SIZE 512
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#define FIO_JOBNAME_SIZE 128
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#define FIO_JOBDESC_SIZE 256
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#define FIO_VERROR_SIZE 128
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struct thread_stat {
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char name[FIO_JOBNAME_SIZE];
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char verror[FIO_VERROR_SIZE];
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uint32_t error;
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uint32_t thread_number;
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uint32_t groupid;
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uint32_t pid;
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char description[FIO_JOBDESC_SIZE];
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uint32_t members;
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uint32_t unified_rw_rep;
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/*
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* bandwidth and latency stats
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*/
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struct io_stat clat_stat[DDIR_RWDIR_CNT]; /* completion latency */
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struct io_stat slat_stat[DDIR_RWDIR_CNT]; /* submission latency */
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struct io_stat lat_stat[DDIR_RWDIR_CNT]; /* total latency */
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struct io_stat bw_stat[DDIR_RWDIR_CNT]; /* bandwidth stats */
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struct io_stat iops_stat[DDIR_RWDIR_CNT]; /* IOPS stats */
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/*
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* fio system usage accounting
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*/
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uint64_t usr_time;
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uint64_t sys_time;
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uint64_t ctx;
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uint64_t minf, majf;
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/*
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* IO depth and latency stats
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*/
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uint64_t clat_percentiles;
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uint64_t percentile_precision;
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fio_fp64_t percentile_list[FIO_IO_U_LIST_MAX_LEN];
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uint32_t io_u_map[FIO_IO_U_MAP_NR];
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uint32_t io_u_submit[FIO_IO_U_MAP_NR];
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uint32_t io_u_complete[FIO_IO_U_MAP_NR];
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uint32_t io_u_lat_u[FIO_IO_U_LAT_U_NR];
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uint32_t io_u_lat_m[FIO_IO_U_LAT_M_NR];
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uint32_t io_u_plat[DDIR_RWDIR_CNT][FIO_IO_U_PLAT_NR];
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uint32_t pad;
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uint64_t total_io_u[3];
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uint64_t short_io_u[3];
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uint64_t drop_io_u[3];
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uint64_t total_submit;
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uint64_t total_complete;
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uint64_t io_bytes[DDIR_RWDIR_CNT];
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uint64_t runtime[DDIR_RWDIR_CNT];
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uint64_t total_run_time;
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/*
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* IO Error related stats
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*/
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union {
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uint16_t continue_on_error;
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uint64_t pad2;
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};
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uint64_t total_err_count;
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uint32_t first_error;
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uint32_t kb_base;
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uint32_t unit_base;
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uint32_t latency_depth;
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uint64_t latency_target;
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fio_fp64_t latency_percentile;
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uint64_t latency_window;
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} __attribute__((packed));
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struct jobs_eta {
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uint32_t nr_running;
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uint32_t nr_ramp;
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uint32_t nr_pending;
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uint32_t nr_setting_up;
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uint32_t files_open;
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uint32_t m_rate[DDIR_RWDIR_CNT], t_rate[DDIR_RWDIR_CNT];
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uint32_t m_iops[DDIR_RWDIR_CNT], t_iops[DDIR_RWDIR_CNT];
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uint32_t rate[DDIR_RWDIR_CNT];
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uint32_t iops[DDIR_RWDIR_CNT];
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uint64_t elapsed_sec;
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uint64_t eta_sec;
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uint32_t is_pow2;
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uint32_t unit_base;
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/*
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* Network 'copy' of run_str[]
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*/
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uint32_t nr_threads;
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uint8_t run_str[];
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} __attribute__((packed));
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extern struct fio_mutex *stat_mutex;
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extern struct jobs_eta *get_jobs_eta(int force, size_t *size);
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extern void stat_init(void);
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extern void stat_exit(void);
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extern struct json_object * show_thread_status(struct thread_stat *ts, struct group_run_stats *rs);
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extern void show_group_stats(struct group_run_stats *rs);
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extern int calc_thread_status(struct jobs_eta *je, int force);
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extern void display_thread_status(struct jobs_eta *je);
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extern void show_run_stats(void);
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extern void __show_run_stats(void);
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extern void __show_running_run_stats(void);
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extern void show_running_run_stats(void);
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extern void check_for_running_stats(void);
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extern void sum_thread_stats(struct thread_stat *dst, struct thread_stat *src, int nr);
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extern void sum_group_stats(struct group_run_stats *dst, struct group_run_stats *src);
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extern void init_thread_stat(struct thread_stat *ts);
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extern void init_group_run_stat(struct group_run_stats *gs);
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extern void eta_to_str(char *str, unsigned long eta_sec);
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extern int calc_lat(struct io_stat *is, unsigned long *min, unsigned long *max, double *mean, double *dev);
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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);
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extern void stat_calc_lat_m(struct thread_stat *ts, double *io_u_lat);
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extern void stat_calc_lat_u(struct thread_stat *ts, double *io_u_lat);
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extern void stat_calc_dist(unsigned int *map, unsigned long total, double *io_u_dist);
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extern void reset_io_stats(struct thread_data *);
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static inline int usec_to_msec(unsigned long *min, unsigned long *max,
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double *mean, double *dev)
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{
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if (*min > 1000 && *max > 1000 && *mean > 1000.0 && *dev > 1000.0) {
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*min /= 1000;
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*max /= 1000;
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*mean /= 1000.0;
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*dev /= 1000.0;
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return 0;
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}
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return 1;
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}
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/*
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* Worst level condensing would be 1:5, so allow enough room for that
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*/
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#define __THREAD_RUNSTR_SZ(nr) ((nr) * 5)
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#define THREAD_RUNSTR_SZ __THREAD_RUNSTR_SZ(thread_number)
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#endif
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