diff options
Diffstat (limited to 'qemu/block/accounting.c')
| -rw-r--r-- | qemu/block/accounting.c | 173 |
1 files changed, 0 insertions, 173 deletions
diff --git a/qemu/block/accounting.c b/qemu/block/accounting.c deleted file mode 100644 index 3f457c4e7..000000000 --- a/qemu/block/accounting.c +++ /dev/null @@ -1,173 +0,0 @@ -/* - * QEMU System Emulator block accounting - * - * Copyright (c) 2011 Christoph Hellwig - * Copyright (c) 2015 Igalia, S.L. - * - * Permission is hereby granted, free of charge, to any person obtaining a copy - * of this software and associated documentation files (the "Software"), to deal - * in the Software without restriction, including without limitation the rights - * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell - * copies of the Software, and to permit persons to whom the Software is - * furnished to do so, subject to the following conditions: - * - * The above copyright notice and this permission notice shall be included in - * all copies or substantial portions of the Software. - * - * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR - * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, - * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL - * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER - * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, - * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN - * THE SOFTWARE. - */ - -#include "qemu/osdep.h" -#include "block/accounting.h" -#include "block/block_int.h" -#include "qemu/timer.h" -#include "sysemu/qtest.h" - -static QEMUClockType clock_type = QEMU_CLOCK_REALTIME; -static const int qtest_latency_ns = NANOSECONDS_PER_SECOND / 1000; - -void block_acct_init(BlockAcctStats *stats, bool account_invalid, - bool account_failed) -{ - stats->account_invalid = account_invalid; - stats->account_failed = account_failed; - - if (qtest_enabled()) { - clock_type = QEMU_CLOCK_VIRTUAL; - } -} - -void block_acct_cleanup(BlockAcctStats *stats) -{ - BlockAcctTimedStats *s, *next; - QSLIST_FOREACH_SAFE(s, &stats->intervals, entries, next) { - g_free(s); - } -} - -void block_acct_add_interval(BlockAcctStats *stats, unsigned interval_length) -{ - BlockAcctTimedStats *s; - unsigned i; - - s = g_new0(BlockAcctTimedStats, 1); - s->interval_length = interval_length; - QSLIST_INSERT_HEAD(&stats->intervals, s, entries); - - for (i = 0; i < BLOCK_MAX_IOTYPE; i++) { - timed_average_init(&s->latency[i], clock_type, - (uint64_t) interval_length * NANOSECONDS_PER_SECOND); - } -} - -BlockAcctTimedStats *block_acct_interval_next(BlockAcctStats *stats, - BlockAcctTimedStats *s) -{ - if (s == NULL) { - return QSLIST_FIRST(&stats->intervals); - } else { - return QSLIST_NEXT(s, entries); - } -} - -void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie, - int64_t bytes, enum BlockAcctType type) -{ - assert(type < BLOCK_MAX_IOTYPE); - - cookie->bytes = bytes; - cookie->start_time_ns = qemu_clock_get_ns(clock_type); - cookie->type = type; -} - -void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie) -{ - BlockAcctTimedStats *s; - int64_t time_ns = qemu_clock_get_ns(clock_type); - int64_t latency_ns = time_ns - cookie->start_time_ns; - - if (qtest_enabled()) { - latency_ns = qtest_latency_ns; - } - - assert(cookie->type < BLOCK_MAX_IOTYPE); - - stats->nr_bytes[cookie->type] += cookie->bytes; - stats->nr_ops[cookie->type]++; - stats->total_time_ns[cookie->type] += latency_ns; - stats->last_access_time_ns = time_ns; - - QSLIST_FOREACH(s, &stats->intervals, entries) { - timed_average_account(&s->latency[cookie->type], latency_ns); - } -} - -void block_acct_failed(BlockAcctStats *stats, BlockAcctCookie *cookie) -{ - assert(cookie->type < BLOCK_MAX_IOTYPE); - - stats->failed_ops[cookie->type]++; - - if (stats->account_failed) { - BlockAcctTimedStats *s; - int64_t time_ns = qemu_clock_get_ns(clock_type); - int64_t latency_ns = time_ns - cookie->start_time_ns; - - if (qtest_enabled()) { - latency_ns = qtest_latency_ns; - } - - stats->total_time_ns[cookie->type] += latency_ns; - stats->last_access_time_ns = time_ns; - - QSLIST_FOREACH(s, &stats->intervals, entries) { - timed_average_account(&s->latency[cookie->type], latency_ns); - } - } -} - -void block_acct_invalid(BlockAcctStats *stats, enum BlockAcctType type) -{ - assert(type < BLOCK_MAX_IOTYPE); - - /* block_acct_done() and block_acct_failed() update - * total_time_ns[], but this one does not. The reason is that - * invalid requests are accounted during their submission, - * therefore there's no actual I/O involved. */ - - stats->invalid_ops[type]++; - - if (stats->account_invalid) { - stats->last_access_time_ns = qemu_clock_get_ns(clock_type); - } -} - -void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type, - int num_requests) -{ - assert(type < BLOCK_MAX_IOTYPE); - stats->merged[type] += num_requests; -} - -int64_t block_acct_idle_time_ns(BlockAcctStats *stats) -{ - return qemu_clock_get_ns(clock_type) - stats->last_access_time_ns; -} - -double block_acct_queue_depth(BlockAcctTimedStats *stats, - enum BlockAcctType type) -{ - uint64_t sum, elapsed; - - assert(type < BLOCK_MAX_IOTYPE); - - sum = timed_average_sum(&stats->latency[type], &elapsed); - - return (double) sum / elapsed; -} |