7ee12dafe9
This patch adds the block_acct_failed() and block_acct_invalid() functions to allow keeping track of failed and invalid I/O operations. The number of failed and invalid operations is exposed in BlockDeviceStats. We don't keep track of the time spent on invalid operations because they are cancelled immediately when they are started. Signed-off-by: Alberto Garcia <berto@igalia.com> Message-id: a7256ccb883a86356b1c6c46b5a29ed5448546a5.1446044837.git.berto@igalia.com Signed-off-by: Stefan Hajnoczi <stefanha@redhat.com> Signed-off-by: Kevin Wolf <kwolf@redhat.com>
64 lines
2.3 KiB
C
64 lines
2.3 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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*
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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 "qemu/typedefs.h"
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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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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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} 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_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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#endif
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