d0c5f28a5c
Summary: Add GetThreadList API, which allows developer to track the status of each process. Currently, calling GetThreadList will only get the list of background threads in RocksDB with their thread-id and thread-type (priority) set. Will add more support on this in the later diffs. ThreadStatus currently has the following properties: // An unique ID for the thread. const uint64_t thread_id; // The type of the thread, it could be ROCKSDB_HIGH_PRIORITY, // ROCKSDB_LOW_PRIORITY, and USER_THREAD const ThreadType thread_type; // The name of the DB instance where the thread is currently // involved with. It would be set to empty string if the thread // does not involve in any DB operation. const std::string db_name; // The name of the column family where the thread is currently // It would be set to empty string if the thread does not involve // in any column family. const std::string cf_name; // The event that the current thread is involved. // It would be set to empty string if the information about event // is not currently available. Test Plan: ./thread_list_test export ROCKSDB_TESTS=GetThreadList ./db_test Reviewers: rven, igor, sdong, ljin Reviewed By: ljin Subscribers: dhruba, leveldb Differential Revision: https://reviews.facebook.net/D25047
67 lines
2.0 KiB
C++
67 lines
2.0 KiB
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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#pragma once
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#include <cstddef>
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#include <string>
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#ifndef ROCKSDB_USING_THREAD_STATUS
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#define ROCKSDB_USING_THREAD_STATUS \
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!defined(ROCKSDB_LITE) && \
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!defined(NROCKSDB_THREAD_STATUS) && \
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!defined(OS_MACOSX)
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#endif
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namespace rocksdb {
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// A structure that describes the current status of a thread.
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// The status of active threads can be fetched using
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// rocksdb::GetThreadList().
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struct ThreadStatus {
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enum ThreadType {
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ROCKSDB_HIGH_PRIORITY = 0x0,
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ROCKSDB_LOW_PRIORITY = 0x1,
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USER_THREAD = 0x2,
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TOTAL = 0x3
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};
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#if ROCKSDB_USING_THREAD_STATUS
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ThreadStatus(const uint64_t _id,
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const ThreadType _thread_type,
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const std::string& _db_name,
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const std::string& _cf_name,
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const std::string& _event) :
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thread_id(_id), thread_type(_thread_type),
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db_name(_db_name),
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cf_name(_cf_name),
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event(_event) {}
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// An unique ID for the thread.
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const uint64_t thread_id;
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// The type of the thread, it could be ROCKSDB_HIGH_PRIORITY,
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// ROCKSDB_LOW_PRIORITY, and USER_THREAD
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const ThreadType thread_type;
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// The name of the DB instance where the thread is currently
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// involved with. It would be set to empty string if the thread
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// does not involve in any DB operation.
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const std::string db_name;
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// The name of the column family where the thread is currently
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// It would be set to empty string if the thread does not involve
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// in any column family.
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const std::string cf_name;
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// The event that the current thread is involved.
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// It would be set to empty string if the information about event
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// is not currently available.
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const std::string event;
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#endif // ROCKSDB_USING_THREAD_STATUS
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};
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} // namespace rocksdb
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