aece5edc96
Signed-off-by: Alberto Garcia <berto@igalia.com> Message-id: 80a2278e3ec2dafd5daab20a7cb2d6a9b83371e4.1446044838.git.berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
86 lines
3.2 KiB
C
86 lines
3.2 KiB
C
/*
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* QEMU System Emulator block accounting
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*
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* Copyright (c) 2011 Christoph Hellwig
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* Copyright (c) 2015 Igalia, S.L.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#ifndef BLOCK_ACCOUNTING_H
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#define BLOCK_ACCOUNTING_H
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#include <stdint.h>
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#include <stdbool.h>
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#include "qemu/typedefs.h"
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#include "qemu/timed-average.h"
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typedef struct BlockAcctTimedStats BlockAcctTimedStats;
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enum BlockAcctType {
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BLOCK_ACCT_READ,
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BLOCK_ACCT_WRITE,
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BLOCK_ACCT_FLUSH,
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BLOCK_MAX_IOTYPE,
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};
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struct BlockAcctTimedStats {
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TimedAverage latency[BLOCK_MAX_IOTYPE];
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unsigned interval_length; /* in seconds */
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QSLIST_ENTRY(BlockAcctTimedStats) entries;
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};
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typedef struct BlockAcctStats {
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uint64_t nr_bytes[BLOCK_MAX_IOTYPE];
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uint64_t nr_ops[BLOCK_MAX_IOTYPE];
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uint64_t invalid_ops[BLOCK_MAX_IOTYPE];
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uint64_t failed_ops[BLOCK_MAX_IOTYPE];
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uint64_t total_time_ns[BLOCK_MAX_IOTYPE];
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uint64_t merged[BLOCK_MAX_IOTYPE];
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int64_t last_access_time_ns;
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QSLIST_HEAD(, BlockAcctTimedStats) intervals;
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bool account_invalid;
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bool account_failed;
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} BlockAcctStats;
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typedef struct BlockAcctCookie {
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int64_t bytes;
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int64_t start_time_ns;
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enum BlockAcctType type;
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} BlockAcctCookie;
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void block_acct_init(BlockAcctStats *stats, bool account_invalid,
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bool account_failed);
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void block_acct_cleanup(BlockAcctStats *stats);
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void block_acct_add_interval(BlockAcctStats *stats, unsigned interval_length);
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BlockAcctTimedStats *block_acct_interval_next(BlockAcctStats *stats,
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BlockAcctTimedStats *s);
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void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie,
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int64_t bytes, enum BlockAcctType type);
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void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie);
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void block_acct_failed(BlockAcctStats *stats, BlockAcctCookie *cookie);
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void block_acct_invalid(BlockAcctStats *stats, enum BlockAcctType type);
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void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type,
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int num_requests);
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int64_t block_acct_idle_time_ns(BlockAcctStats *stats);
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double block_acct_queue_depth(BlockAcctTimedStats *stats,
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enum BlockAcctType type);
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#endif
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