io: add QIOChannelTLS class
[qemu/ar7.git] / block / accounting.c
blob185025ec1e98d72519d4fb0ccde123fa4afeca5e
1 /*
2 * QEMU System Emulator block accounting
4 * Copyright (c) 2011 Christoph Hellwig
5 * Copyright (c) 2015 Igalia, S.L.
7 * Permission is hereby granted, free of charge, to any person obtaining a copy
8 * of this software and associated documentation files (the "Software"), to deal
9 * in the Software without restriction, including without limitation the rights
10 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
11 * copies of the Software, and to permit persons to whom the Software is
12 * furnished to do so, subject to the following conditions:
14 * The above copyright notice and this permission notice shall be included in
15 * all copies or substantial portions of the Software.
17 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
18 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
19 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
20 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
21 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
22 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
23 * THE SOFTWARE.
26 #include "block/accounting.h"
27 #include "block/block_int.h"
28 #include "qemu/timer.h"
29 #include "sysemu/qtest.h"
31 static QEMUClockType clock_type = QEMU_CLOCK_REALTIME;
32 static const int qtest_latency_ns = NANOSECONDS_PER_SECOND / 1000;
34 void block_acct_init(BlockAcctStats *stats, bool account_invalid,
35 bool account_failed)
37 stats->account_invalid = account_invalid;
38 stats->account_failed = account_failed;
40 if (qtest_enabled()) {
41 clock_type = QEMU_CLOCK_VIRTUAL;
45 void block_acct_cleanup(BlockAcctStats *stats)
47 BlockAcctTimedStats *s, *next;
48 QSLIST_FOREACH_SAFE(s, &stats->intervals, entries, next) {
49 g_free(s);
53 void block_acct_add_interval(BlockAcctStats *stats, unsigned interval_length)
55 BlockAcctTimedStats *s;
56 unsigned i;
58 s = g_new0(BlockAcctTimedStats, 1);
59 s->interval_length = interval_length;
60 QSLIST_INSERT_HEAD(&stats->intervals, s, entries);
62 for (i = 0; i < BLOCK_MAX_IOTYPE; i++) {
63 timed_average_init(&s->latency[i], clock_type,
64 (uint64_t) interval_length * NANOSECONDS_PER_SECOND);
68 BlockAcctTimedStats *block_acct_interval_next(BlockAcctStats *stats,
69 BlockAcctTimedStats *s)
71 if (s == NULL) {
72 return QSLIST_FIRST(&stats->intervals);
73 } else {
74 return QSLIST_NEXT(s, entries);
78 void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie,
79 int64_t bytes, enum BlockAcctType type)
81 assert(type < BLOCK_MAX_IOTYPE);
83 cookie->bytes = bytes;
84 cookie->start_time_ns = qemu_clock_get_ns(clock_type);
85 cookie->type = type;
88 void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie)
90 BlockAcctTimedStats *s;
91 int64_t time_ns = qemu_clock_get_ns(clock_type);
92 int64_t latency_ns = time_ns - cookie->start_time_ns;
94 if (qtest_enabled()) {
95 latency_ns = qtest_latency_ns;
98 assert(cookie->type < BLOCK_MAX_IOTYPE);
100 stats->nr_bytes[cookie->type] += cookie->bytes;
101 stats->nr_ops[cookie->type]++;
102 stats->total_time_ns[cookie->type] += latency_ns;
103 stats->last_access_time_ns = time_ns;
105 QSLIST_FOREACH(s, &stats->intervals, entries) {
106 timed_average_account(&s->latency[cookie->type], latency_ns);
110 void block_acct_failed(BlockAcctStats *stats, BlockAcctCookie *cookie)
112 assert(cookie->type < BLOCK_MAX_IOTYPE);
114 stats->failed_ops[cookie->type]++;
116 if (stats->account_failed) {
117 BlockAcctTimedStats *s;
118 int64_t time_ns = qemu_clock_get_ns(clock_type);
119 int64_t latency_ns = time_ns - cookie->start_time_ns;
121 if (qtest_enabled()) {
122 latency_ns = qtest_latency_ns;
125 stats->total_time_ns[cookie->type] += latency_ns;
126 stats->last_access_time_ns = time_ns;
128 QSLIST_FOREACH(s, &stats->intervals, entries) {
129 timed_average_account(&s->latency[cookie->type], latency_ns);
134 void block_acct_invalid(BlockAcctStats *stats, enum BlockAcctType type)
136 assert(type < BLOCK_MAX_IOTYPE);
138 /* block_acct_done() and block_acct_failed() update
139 * total_time_ns[], but this one does not. The reason is that
140 * invalid requests are accounted during their submission,
141 * therefore there's no actual I/O involved. */
143 stats->invalid_ops[type]++;
145 if (stats->account_invalid) {
146 stats->last_access_time_ns = qemu_clock_get_ns(clock_type);
150 void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type,
151 int num_requests)
153 assert(type < BLOCK_MAX_IOTYPE);
154 stats->merged[type] += num_requests;
157 int64_t block_acct_idle_time_ns(BlockAcctStats *stats)
159 return qemu_clock_get_ns(clock_type) - stats->last_access_time_ns;
162 double block_acct_queue_depth(BlockAcctTimedStats *stats,
163 enum BlockAcctType type)
165 uint64_t sum, elapsed;
167 assert(type < BLOCK_MAX_IOTYPE);
169 sum = timed_average_sum(&stats->latency[type], &elapsed);
171 return (double) sum / elapsed;