90a6aca48e
Summary: This diff allows the I/O stats about Flush and Compaction to be reported in a more accurate way. Instead of measuring the size of a file, it measure I/O cost in per read / write basis. Test Plan: make all check Reviewers: sdong, igor, ljin Reviewed By: ljin Subscribers: leveldb Differential Revision: https://reviews.facebook.net/D19383
35 lines
940 B
C++
35 lines
940 B
C++
// Copyright (c) 2014, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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#ifndef INCLUDE_ROCKSDB_IOSTATS_CONTEXT_H_
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#define INCLUDE_ROCKSDB_IOSTATS_CONTEXT_H_
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#include <stdint.h>
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#include <string>
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// A thread local context for gathering io-stats efficiently and transparently.
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namespace rocksdb {
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struct IOStatsContext {
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// reset all io-stats counter to zero
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void Reset();
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std::string ToString() const;
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// the thread pool id
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uint64_t thread_pool_id;
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// number of bytes that has been written.
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uint64_t bytes_written;
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// number of bytes that has been read.
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uint64_t bytes_read;
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};
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extern __thread IOStatsContext iostats_context;
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} // namespace rocksdb
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#endif // INCLUDE_ROCKSDB_IOSTATS_CONTEXT_H_
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