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25#ifndef BLOCK_ACCOUNTING_H
26#define BLOCK_ACCOUNTING_H
27
28#include "qemu/timed-average.h"
29#include "qemu/thread.h"
30#include "qapi/qapi-builtin-types.h"
31
32typedef struct BlockAcctTimedStats BlockAcctTimedStats;
33typedef struct BlockAcctStats BlockAcctStats;
34
35enum BlockAcctType {
36 BLOCK_ACCT_NONE = 0,
37 BLOCK_ACCT_READ,
38 BLOCK_ACCT_WRITE,
39 BLOCK_ACCT_FLUSH,
40 BLOCK_ACCT_UNMAP,
41 BLOCK_MAX_IOTYPE,
42};
43
44struct BlockAcctTimedStats {
45 BlockAcctStats *stats;
46 TimedAverage latency[BLOCK_MAX_IOTYPE];
47 unsigned interval_length;
48 QSLIST_ENTRY(BlockAcctTimedStats) entries;
49};
50
51typedef struct BlockLatencyHistogram {
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75 int nbins;
76 uint64_t *boundaries;
77
78 uint64_t *bins;
79} BlockLatencyHistogram;
80
81struct BlockAcctStats {
82 QemuMutex lock;
83 uint64_t nr_bytes[BLOCK_MAX_IOTYPE];
84 uint64_t nr_ops[BLOCK_MAX_IOTYPE];
85 uint64_t invalid_ops[BLOCK_MAX_IOTYPE];
86 uint64_t failed_ops[BLOCK_MAX_IOTYPE];
87 uint64_t total_time_ns[BLOCK_MAX_IOTYPE];
88 uint64_t merged[BLOCK_MAX_IOTYPE];
89 int64_t last_access_time_ns;
90 QSLIST_HEAD(, BlockAcctTimedStats) intervals;
91 bool account_invalid;
92 bool account_failed;
93 BlockLatencyHistogram latency_histogram[BLOCK_MAX_IOTYPE];
94};
95
96typedef struct BlockAcctCookie {
97 int64_t bytes;
98 int64_t start_time_ns;
99 enum BlockAcctType type;
100} BlockAcctCookie;
101
102void block_acct_init(BlockAcctStats *stats);
103void block_acct_setup(BlockAcctStats *stats, bool account_invalid,
104 bool account_failed);
105void block_acct_cleanup(BlockAcctStats *stats);
106void block_acct_add_interval(BlockAcctStats *stats, unsigned interval_length);
107BlockAcctTimedStats *block_acct_interval_next(BlockAcctStats *stats,
108 BlockAcctTimedStats *s);
109void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie,
110 int64_t bytes, enum BlockAcctType type);
111void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie);
112void block_acct_failed(BlockAcctStats *stats, BlockAcctCookie *cookie);
113void block_acct_invalid(BlockAcctStats *stats, enum BlockAcctType type);
114void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type,
115 int num_requests);
116int64_t block_acct_idle_time_ns(BlockAcctStats *stats);
117double block_acct_queue_depth(BlockAcctTimedStats *stats,
118 enum BlockAcctType type);
119int block_latency_histogram_set(BlockAcctStats *stats, enum BlockAcctType type,
120 uint64List *boundaries);
121void block_latency_histograms_clear(BlockAcctStats *stats);
122
123#endif
124