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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_READ,
37 BLOCK_ACCT_WRITE,
38 BLOCK_ACCT_FLUSH,
39 BLOCK_MAX_IOTYPE,
40};
41
42struct BlockAcctTimedStats {
43 BlockAcctStats *stats;
44 TimedAverage latency[BLOCK_MAX_IOTYPE];
45 unsigned interval_length;
46 QSLIST_ENTRY(BlockAcctTimedStats) entries;
47};
48
49typedef struct BlockLatencyHistogram {
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73 int nbins;
74 uint64_t *boundaries;
75
76 uint64_t *bins;
77} BlockLatencyHistogram;
78
79struct BlockAcctStats {
80 QemuMutex lock;
81 uint64_t nr_bytes[BLOCK_MAX_IOTYPE];
82 uint64_t nr_ops[BLOCK_MAX_IOTYPE];
83 uint64_t invalid_ops[BLOCK_MAX_IOTYPE];
84 uint64_t failed_ops[BLOCK_MAX_IOTYPE];
85 uint64_t total_time_ns[BLOCK_MAX_IOTYPE];
86 uint64_t merged[BLOCK_MAX_IOTYPE];
87 int64_t last_access_time_ns;
88 QSLIST_HEAD(, BlockAcctTimedStats) intervals;
89 bool account_invalid;
90 bool account_failed;
91 BlockLatencyHistogram latency_histogram[BLOCK_MAX_IOTYPE];
92};
93
94typedef struct BlockAcctCookie {
95 int64_t bytes;
96 int64_t start_time_ns;
97 enum BlockAcctType type;
98} BlockAcctCookie;
99
100void block_acct_init(BlockAcctStats *stats);
101void block_acct_setup(BlockAcctStats *stats, bool account_invalid,
102 bool account_failed);
103void block_acct_cleanup(BlockAcctStats *stats);
104void block_acct_add_interval(BlockAcctStats *stats, unsigned interval_length);
105BlockAcctTimedStats *block_acct_interval_next(BlockAcctStats *stats,
106 BlockAcctTimedStats *s);
107void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie,
108 int64_t bytes, enum BlockAcctType type);
109void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie);
110void block_acct_failed(BlockAcctStats *stats, BlockAcctCookie *cookie);
111void block_acct_invalid(BlockAcctStats *stats, enum BlockAcctType type);
112void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type,
113 int num_requests);
114int64_t block_acct_idle_time_ns(BlockAcctStats *stats);
115double block_acct_queue_depth(BlockAcctTimedStats *stats,
116 enum BlockAcctType type);
117int block_latency_histogram_set(BlockAcctStats *stats, enum BlockAcctType type,
118 uint64List *boundaries);
119void block_latency_histograms_clear(BlockAcctStats *stats);
120
121#endif
122