[qemu.git] / include / block / accounting.h

/*
 * QEMU System Emulator block accounting
 *
 * Copyright (c) 2011 Christoph Hellwig
 *
 * 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 "qemu/typedefs.h"

enum BlockAcctType {
    BLOCK_ACCT_READ,
    BLOCK_ACCT_WRITE,
    BLOCK_ACCT_FLUSH,
    BLOCK_MAX_IOTYPE,
};

typedef struct BlockAcctStats {
    uint64_t nr_bytes[BLOCK_MAX_IOTYPE];
    uint64_t nr_ops[BLOCK_MAX_IOTYPE];
    uint64_t total_time_ns[BLOCK_MAX_IOTYPE];
    uint64_t merged[BLOCK_MAX_IOTYPE];
    uint64_t wr_highest_sector;
} BlockAcctStats;

typedef struct BlockAcctCookie {
    int64_t bytes;
    int64_t start_time_ns;
    enum BlockAcctType type;
} BlockAcctCookie;

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_highest_sector(BlockAcctStats *stats, int64_t sector_num,
                               unsigned int nb_sectors);
void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type,
                           int num_requests);

#endif
Commit	Line	Data
5e5a94b6 BC	1	/*
	2	* QEMU System Emulator block accounting
	3	*
	4	* Copyright (c) 2011 Christoph Hellwig
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a copy
	7	* of this software and associated documentation files (the "Software"), to deal
	8	* in the Software without restriction, including without limitation the rights
	9	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	10	* copies of the Software, and to permit persons to whom the Software is
	11	* furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice shall be included in
	14	* all copies or substantial portions of the Software.
	15	*
	16	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	17	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	18	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	19	* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	20	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	21	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
	22	* THE SOFTWARE.
	23	*/
	24	#ifndef BLOCK_ACCOUNTING_H
	25	#define BLOCK_ACCOUNTING_H
	26
	27	#include <stdint.h>
	28
	29	#include "qemu/typedefs.h"
	30
	31	enum BlockAcctType {
28298fd3 BC	32	BLOCK_ACCT_READ,
	33	BLOCK_ACCT_WRITE,
	34	BLOCK_ACCT_FLUSH,
	35	BLOCK_MAX_IOTYPE,
5e5a94b6 BC	36	};
	37
	38	typedef struct BlockAcctStats {
28298fd3 BC	39	uint64_t nr_bytes[BLOCK_MAX_IOTYPE];
	40	uint64_t nr_ops[BLOCK_MAX_IOTYPE];
	41	uint64_t total_time_ns[BLOCK_MAX_IOTYPE];
f4564d53	42	uint64_t merged[BLOCK_MAX_IOTYPE];
5e5a94b6 BC	43	uint64_t wr_highest_sector;
	44	} BlockAcctStats;
	45
	46	typedef struct BlockAcctCookie {
	47	int64_t bytes;
	48	int64_t start_time_ns;
	49	enum BlockAcctType type;
	50	} BlockAcctCookie;
	51
5366d0c8 BC	52	void block_acct_start(BlockAcctStats stats, BlockAcctCookie cookie,
	53	int64_t bytes, enum BlockAcctType type);
	54	void block_acct_done(BlockAcctStats stats, BlockAcctCookie cookie);
	55	void block_acct_highest_sector(BlockAcctStats *stats, int64_t sector_num,
	56	unsigned int nb_sectors);
f4564d53 PL	57	void block_acct_merge_done(BlockAcctStats *stats, enum BlockAcctType type,
f4564d53 PL	58	int num_requests);
5e5a94b6 BC	59
5e5a94b6 BC	60	#endif