/* * 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. */ #ifndef BLOCK_ACCOUNTING_H #define BLOCK_ACCOUNTING_H #include <stdint.h> #include <stdbool.h> #include "qemu/typedefs.h" #include "qemu/timed-average.h" typedef struct BlockAcctTimedStats BlockAcctTimedStats; enum BlockAcctType { BLOCK_ACCT_READ, BLOCK_ACCT_WRITE, BLOCK_ACCT_FLUSH, BLOCK_MAX_IOTYPE, }; struct BlockAcctTimedStats { TimedAverage latency[BLOCK_MAX_IOTYPE]; unsigned interval_length; /* in seconds */ QSLIST_ENTRY(BlockAcctTimedStats) entries; }; typedef struct BlockAcctStats { uint64_t nr_bytes[BLOCK_MAX_IOTYPE]; uint64_t nr_ops[BLOCK_MAX_IOTYPE]; uint64_t invalid_ops[BLOCK_MAX_IOTYPE]; uint64_t failed_ops[BLOCK_MAX_IOTYPE]; uint64_t total_time_ns[BLOCK_MAX_IOTYPE]; uint64_t merged[BLOCK_MAX_IOTYPE]; int64_t last_access_time_ns; QSLIST_HEAD(, BlockAcctTimedStats) intervals; bool account_invalid; bool account_failed; } BlockAcctStats; typedef struct BlockAcctCookie { int64_t bytes; int64_t start_time_ns; enum BlockAcctType type; } BlockAcctCookie; void block_acct_init(BlockAcctStats *stats, bool account_invalid, bool account_failed); void block_acct_cleanup(BlockAcctStats *stats); void block_acct_add_interval(BlockAcctStats *stats, unsigned interval_length); BlockAcctTimedStats *block_acct_interval_next(BlockAcctStats *stats, BlockAcctTimedStats *s); void block_acct_start(BlockAcctStats *stats, BlockAcctCookie *cookie, int64_t bytes, enum BlockAcctType type); void block_acct_done(BlockAcctStats *stats, BlockAcctCookie *cookie); void block_acct_failed(BlockAcctStats *stats, BlockAcctCookie *cookie); void block_acct_invalid(BlockAcctStats *stats, enum BlockAcctType type); void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type, int num_requests); int64_t block_acct_idle_time_ns(BlockAcctStats *stats); double block_acct_queue_depth(BlockAcctTimedStats *stats, enum BlockAcctType type); #endif