作者: 韩晨旭 10225101440 李畅 10225102463

121 lines
3.9 KiB

Add move constructor to Status. This will result in smaller code generation when Status instances are passed around. Benchmarks don't indicate a significant change either way. CPU: 48 * Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz CPUCache: 30720 KB Keys: 16 bytes each Values: 100 bytes each (50 bytes after compression) Entries: 1000000 RawSize: 110.6 MB (estimated) FileSize: 62.9 MB (estimated) Baseline: fillseq : 3.589 micros/op; 30.8 MB/s fillsync : 4165.299 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.864 micros/op; 18.9 MB/s overwrite : 7.830 micros/op; 14.1 MB/s readrandom : 5.534 micros/op; (1000000 of 1000000 found) readrandom : 4.292 micros/op; (1000000 of 1000000 found) readseq : 0.312 micros/op; 354.1 MB/s readreverse : 0.501 micros/op; 220.8 MB/s compact : 886211.000 micros/op; readrandom : 3.518 micros/op; (1000000 of 1000000 found) readseq : 0.251 micros/op; 441.2 MB/s readreverse : 0.456 micros/op; 242.4 MB/s fill100K : 1329.723 micros/op; 71.7 MB/s (1000 ops) crc32c : 1.976 micros/op; 1976.7 MB/s (4K per op) snappycomp : 4.705 micros/op; 830.2 MB/s (output: 55.1%) snappyuncomp : 0.958 micros/op; 4079.1 MB/s acquireload : 0.727 micros/op; (each op is 1000 loads) New: fillseq : 3.129 micros/op; 35.4 MB/s fillsync : 2748.099 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.394 micros/op; 20.5 MB/s overwrite : 7.253 micros/op; 15.3 MB/s readrandom : 5.655 micros/op; (1000000 of 1000000 found) readrandom : 4.425 micros/op; (1000000 of 1000000 found) readseq : 0.298 micros/op; 371.3 MB/s readreverse : 0.508 micros/op; 217.9 MB/s compact : 885842.000 micros/op; readrandom : 3.545 micros/op; (1000000 of 1000000 found) readseq : 0.252 micros/op; 438.2 MB/s readreverse : 0.425 micros/op; 260.2 MB/s fill100K : 1418.347 micros/op; 67.2 MB/s (1000 ops) crc32c : 1.987 micros/op; 1966.0 MB/s (4K per op) snappycomp : 4.767 micros/op; 819.4 MB/s (output: 55.1%) snappyuncomp : 0.916 micros/op; 4264.9 MB/s acquireload : 0.665 micros/op; (each op is 1000 loads) ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=194002392
6 years ago
Add move constructor to Status. This will result in smaller code generation when Status instances are passed around. Benchmarks don't indicate a significant change either way. CPU: 48 * Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz CPUCache: 30720 KB Keys: 16 bytes each Values: 100 bytes each (50 bytes after compression) Entries: 1000000 RawSize: 110.6 MB (estimated) FileSize: 62.9 MB (estimated) Baseline: fillseq : 3.589 micros/op; 30.8 MB/s fillsync : 4165.299 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.864 micros/op; 18.9 MB/s overwrite : 7.830 micros/op; 14.1 MB/s readrandom : 5.534 micros/op; (1000000 of 1000000 found) readrandom : 4.292 micros/op; (1000000 of 1000000 found) readseq : 0.312 micros/op; 354.1 MB/s readreverse : 0.501 micros/op; 220.8 MB/s compact : 886211.000 micros/op; readrandom : 3.518 micros/op; (1000000 of 1000000 found) readseq : 0.251 micros/op; 441.2 MB/s readreverse : 0.456 micros/op; 242.4 MB/s fill100K : 1329.723 micros/op; 71.7 MB/s (1000 ops) crc32c : 1.976 micros/op; 1976.7 MB/s (4K per op) snappycomp : 4.705 micros/op; 830.2 MB/s (output: 55.1%) snappyuncomp : 0.958 micros/op; 4079.1 MB/s acquireload : 0.727 micros/op; (each op is 1000 loads) New: fillseq : 3.129 micros/op; 35.4 MB/s fillsync : 2748.099 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.394 micros/op; 20.5 MB/s overwrite : 7.253 micros/op; 15.3 MB/s readrandom : 5.655 micros/op; (1000000 of 1000000 found) readrandom : 4.425 micros/op; (1000000 of 1000000 found) readseq : 0.298 micros/op; 371.3 MB/s readreverse : 0.508 micros/op; 217.9 MB/s compact : 885842.000 micros/op; readrandom : 3.545 micros/op; (1000000 of 1000000 found) readseq : 0.252 micros/op; 438.2 MB/s readreverse : 0.425 micros/op; 260.2 MB/s fill100K : 1418.347 micros/op; 67.2 MB/s (1000 ops) crc32c : 1.987 micros/op; 1966.0 MB/s (4K per op) snappycomp : 4.767 micros/op; 819.4 MB/s (output: 55.1%) snappyuncomp : 0.916 micros/op; 4264.9 MB/s acquireload : 0.665 micros/op; (each op is 1000 loads) ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=194002392
6 years ago
Add move constructor to Status. This will result in smaller code generation when Status instances are passed around. Benchmarks don't indicate a significant change either way. CPU: 48 * Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz CPUCache: 30720 KB Keys: 16 bytes each Values: 100 bytes each (50 bytes after compression) Entries: 1000000 RawSize: 110.6 MB (estimated) FileSize: 62.9 MB (estimated) Baseline: fillseq : 3.589 micros/op; 30.8 MB/s fillsync : 4165.299 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.864 micros/op; 18.9 MB/s overwrite : 7.830 micros/op; 14.1 MB/s readrandom : 5.534 micros/op; (1000000 of 1000000 found) readrandom : 4.292 micros/op; (1000000 of 1000000 found) readseq : 0.312 micros/op; 354.1 MB/s readreverse : 0.501 micros/op; 220.8 MB/s compact : 886211.000 micros/op; readrandom : 3.518 micros/op; (1000000 of 1000000 found) readseq : 0.251 micros/op; 441.2 MB/s readreverse : 0.456 micros/op; 242.4 MB/s fill100K : 1329.723 micros/op; 71.7 MB/s (1000 ops) crc32c : 1.976 micros/op; 1976.7 MB/s (4K per op) snappycomp : 4.705 micros/op; 830.2 MB/s (output: 55.1%) snappyuncomp : 0.958 micros/op; 4079.1 MB/s acquireload : 0.727 micros/op; (each op is 1000 loads) New: fillseq : 3.129 micros/op; 35.4 MB/s fillsync : 2748.099 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.394 micros/op; 20.5 MB/s overwrite : 7.253 micros/op; 15.3 MB/s readrandom : 5.655 micros/op; (1000000 of 1000000 found) readrandom : 4.425 micros/op; (1000000 of 1000000 found) readseq : 0.298 micros/op; 371.3 MB/s readreverse : 0.508 micros/op; 217.9 MB/s compact : 885842.000 micros/op; readrandom : 3.545 micros/op; (1000000 of 1000000 found) readseq : 0.252 micros/op; 438.2 MB/s readreverse : 0.425 micros/op; 260.2 MB/s fill100K : 1418.347 micros/op; 67.2 MB/s (1000 ops) crc32c : 1.987 micros/op; 1966.0 MB/s (4K per op) snappycomp : 4.767 micros/op; 819.4 MB/s (output: 55.1%) snappyuncomp : 0.916 micros/op; 4264.9 MB/s acquireload : 0.665 micros/op; (each op is 1000 loads) ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=194002392
6 years ago
Add move constructor to Status. This will result in smaller code generation when Status instances are passed around. Benchmarks don't indicate a significant change either way. CPU: 48 * Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz CPUCache: 30720 KB Keys: 16 bytes each Values: 100 bytes each (50 bytes after compression) Entries: 1000000 RawSize: 110.6 MB (estimated) FileSize: 62.9 MB (estimated) Baseline: fillseq : 3.589 micros/op; 30.8 MB/s fillsync : 4165.299 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.864 micros/op; 18.9 MB/s overwrite : 7.830 micros/op; 14.1 MB/s readrandom : 5.534 micros/op; (1000000 of 1000000 found) readrandom : 4.292 micros/op; (1000000 of 1000000 found) readseq : 0.312 micros/op; 354.1 MB/s readreverse : 0.501 micros/op; 220.8 MB/s compact : 886211.000 micros/op; readrandom : 3.518 micros/op; (1000000 of 1000000 found) readseq : 0.251 micros/op; 441.2 MB/s readreverse : 0.456 micros/op; 242.4 MB/s fill100K : 1329.723 micros/op; 71.7 MB/s (1000 ops) crc32c : 1.976 micros/op; 1976.7 MB/s (4K per op) snappycomp : 4.705 micros/op; 830.2 MB/s (output: 55.1%) snappyuncomp : 0.958 micros/op; 4079.1 MB/s acquireload : 0.727 micros/op; (each op is 1000 loads) New: fillseq : 3.129 micros/op; 35.4 MB/s fillsync : 2748.099 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.394 micros/op; 20.5 MB/s overwrite : 7.253 micros/op; 15.3 MB/s readrandom : 5.655 micros/op; (1000000 of 1000000 found) readrandom : 4.425 micros/op; (1000000 of 1000000 found) readseq : 0.298 micros/op; 371.3 MB/s readreverse : 0.508 micros/op; 217.9 MB/s compact : 885842.000 micros/op; readrandom : 3.545 micros/op; (1000000 of 1000000 found) readseq : 0.252 micros/op; 438.2 MB/s readreverse : 0.425 micros/op; 260.2 MB/s fill100K : 1418.347 micros/op; 67.2 MB/s (1000 ops) crc32c : 1.987 micros/op; 1966.0 MB/s (4K per op) snappycomp : 4.767 micros/op; 819.4 MB/s (output: 55.1%) snappyuncomp : 0.916 micros/op; 4264.9 MB/s acquireload : 0.665 micros/op; (each op is 1000 loads) ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=194002392
6 years ago
Add move constructor to Status. This will result in smaller code generation when Status instances are passed around. Benchmarks don't indicate a significant change either way. CPU: 48 * Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz CPUCache: 30720 KB Keys: 16 bytes each Values: 100 bytes each (50 bytes after compression) Entries: 1000000 RawSize: 110.6 MB (estimated) FileSize: 62.9 MB (estimated) Baseline: fillseq : 3.589 micros/op; 30.8 MB/s fillsync : 4165.299 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.864 micros/op; 18.9 MB/s overwrite : 7.830 micros/op; 14.1 MB/s readrandom : 5.534 micros/op; (1000000 of 1000000 found) readrandom : 4.292 micros/op; (1000000 of 1000000 found) readseq : 0.312 micros/op; 354.1 MB/s readreverse : 0.501 micros/op; 220.8 MB/s compact : 886211.000 micros/op; readrandom : 3.518 micros/op; (1000000 of 1000000 found) readseq : 0.251 micros/op; 441.2 MB/s readreverse : 0.456 micros/op; 242.4 MB/s fill100K : 1329.723 micros/op; 71.7 MB/s (1000 ops) crc32c : 1.976 micros/op; 1976.7 MB/s (4K per op) snappycomp : 4.705 micros/op; 830.2 MB/s (output: 55.1%) snappyuncomp : 0.958 micros/op; 4079.1 MB/s acquireload : 0.727 micros/op; (each op is 1000 loads) New: fillseq : 3.129 micros/op; 35.4 MB/s fillsync : 2748.099 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.394 micros/op; 20.5 MB/s overwrite : 7.253 micros/op; 15.3 MB/s readrandom : 5.655 micros/op; (1000000 of 1000000 found) readrandom : 4.425 micros/op; (1000000 of 1000000 found) readseq : 0.298 micros/op; 371.3 MB/s readreverse : 0.508 micros/op; 217.9 MB/s compact : 885842.000 micros/op; readrandom : 3.545 micros/op; (1000000 of 1000000 found) readseq : 0.252 micros/op; 438.2 MB/s readreverse : 0.425 micros/op; 260.2 MB/s fill100K : 1418.347 micros/op; 67.2 MB/s (1000 ops) crc32c : 1.987 micros/op; 1966.0 MB/s (4K per op) snappycomp : 4.767 micros/op; 819.4 MB/s (output: 55.1%) snappyuncomp : 0.916 micros/op; 4264.9 MB/s acquireload : 0.665 micros/op; (each op is 1000 loads) ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=194002392
6 years ago
Add move constructor to Status. This will result in smaller code generation when Status instances are passed around. Benchmarks don't indicate a significant change either way. CPU: 48 * Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz CPUCache: 30720 KB Keys: 16 bytes each Values: 100 bytes each (50 bytes after compression) Entries: 1000000 RawSize: 110.6 MB (estimated) FileSize: 62.9 MB (estimated) Baseline: fillseq : 3.589 micros/op; 30.8 MB/s fillsync : 4165.299 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.864 micros/op; 18.9 MB/s overwrite : 7.830 micros/op; 14.1 MB/s readrandom : 5.534 micros/op; (1000000 of 1000000 found) readrandom : 4.292 micros/op; (1000000 of 1000000 found) readseq : 0.312 micros/op; 354.1 MB/s readreverse : 0.501 micros/op; 220.8 MB/s compact : 886211.000 micros/op; readrandom : 3.518 micros/op; (1000000 of 1000000 found) readseq : 0.251 micros/op; 441.2 MB/s readreverse : 0.456 micros/op; 242.4 MB/s fill100K : 1329.723 micros/op; 71.7 MB/s (1000 ops) crc32c : 1.976 micros/op; 1976.7 MB/s (4K per op) snappycomp : 4.705 micros/op; 830.2 MB/s (output: 55.1%) snappyuncomp : 0.958 micros/op; 4079.1 MB/s acquireload : 0.727 micros/op; (each op is 1000 loads) New: fillseq : 3.129 micros/op; 35.4 MB/s fillsync : 2748.099 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.394 micros/op; 20.5 MB/s overwrite : 7.253 micros/op; 15.3 MB/s readrandom : 5.655 micros/op; (1000000 of 1000000 found) readrandom : 4.425 micros/op; (1000000 of 1000000 found) readseq : 0.298 micros/op; 371.3 MB/s readreverse : 0.508 micros/op; 217.9 MB/s compact : 885842.000 micros/op; readrandom : 3.545 micros/op; (1000000 of 1000000 found) readseq : 0.252 micros/op; 438.2 MB/s readreverse : 0.425 micros/op; 260.2 MB/s fill100K : 1418.347 micros/op; 67.2 MB/s (1000 ops) crc32c : 1.987 micros/op; 1966.0 MB/s (4K per op) snappycomp : 4.767 micros/op; 819.4 MB/s (output: 55.1%) snappyuncomp : 0.916 micros/op; 4264.9 MB/s acquireload : 0.665 micros/op; (each op is 1000 loads) ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=194002392
6 years ago
Add move constructor to Status. This will result in smaller code generation when Status instances are passed around. Benchmarks don't indicate a significant change either way. CPU: 48 * Intel(R) Xeon(R) CPU E5-2690 v3 @ 2.60GHz CPUCache: 30720 KB Keys: 16 bytes each Values: 100 bytes each (50 bytes after compression) Entries: 1000000 RawSize: 110.6 MB (estimated) FileSize: 62.9 MB (estimated) Baseline: fillseq : 3.589 micros/op; 30.8 MB/s fillsync : 4165.299 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.864 micros/op; 18.9 MB/s overwrite : 7.830 micros/op; 14.1 MB/s readrandom : 5.534 micros/op; (1000000 of 1000000 found) readrandom : 4.292 micros/op; (1000000 of 1000000 found) readseq : 0.312 micros/op; 354.1 MB/s readreverse : 0.501 micros/op; 220.8 MB/s compact : 886211.000 micros/op; readrandom : 3.518 micros/op; (1000000 of 1000000 found) readseq : 0.251 micros/op; 441.2 MB/s readreverse : 0.456 micros/op; 242.4 MB/s fill100K : 1329.723 micros/op; 71.7 MB/s (1000 ops) crc32c : 1.976 micros/op; 1976.7 MB/s (4K per op) snappycomp : 4.705 micros/op; 830.2 MB/s (output: 55.1%) snappyuncomp : 0.958 micros/op; 4079.1 MB/s acquireload : 0.727 micros/op; (each op is 1000 loads) New: fillseq : 3.129 micros/op; 35.4 MB/s fillsync : 2748.099 micros/op; 0.0 MB/s (1000 ops) fillrandom : 5.394 micros/op; 20.5 MB/s overwrite : 7.253 micros/op; 15.3 MB/s readrandom : 5.655 micros/op; (1000000 of 1000000 found) readrandom : 4.425 micros/op; (1000000 of 1000000 found) readseq : 0.298 micros/op; 371.3 MB/s readreverse : 0.508 micros/op; 217.9 MB/s compact : 885842.000 micros/op; readrandom : 3.545 micros/op; (1000000 of 1000000 found) readseq : 0.252 micros/op; 438.2 MB/s readreverse : 0.425 micros/op; 260.2 MB/s fill100K : 1418.347 micros/op; 67.2 MB/s (1000 ops) crc32c : 1.987 micros/op; 1966.0 MB/s (4K per op) snappycomp : 4.767 micros/op; 819.4 MB/s (output: 55.1%) snappyuncomp : 0.916 micros/op; 4264.9 MB/s acquireload : 0.665 micros/op; (each op is 1000 loads) ------------- Created by MOE: https://github.com/google/moe MOE_MIGRATED_REVID=194002392
6 years ago
  1. // Copyright (c) 2011 The LevelDB Authors. All rights reserved.
  2. // Use of this source code is governed by a BSD-style license that can be
  3. // found in the LICENSE file. See the AUTHORS file for names of contributors.
  4. //
  5. // A Status encapsulates the result of an operation. It may indicate success,
  6. // or it may indicate an error with an associated error message.
  7. //
  8. // Multiple threads can invoke const methods on a Status without
  9. // external synchronization, but if any of the threads may call a
  10. // non-const method, all threads accessing the same Status must use
  11. // external synchronization.
  12. #ifndef STORAGE_LEVELDB_INCLUDE_STATUS_H_
  13. #define STORAGE_LEVELDB_INCLUDE_STATUS_H_
  14. #include <algorithm>
  15. #include <string>
  16. #include "leveldb/export.h"
  17. #include "leveldb/slice.h"
  18. namespace leveldb {
  19. class LEVELDB_EXPORT Status {
  20. public:
  21. // Create a success status.
  22. Status() noexcept : state_(nullptr) { }
  23. ~Status() { delete[] state_; }
  24. Status(const Status& rhs);
  25. Status& operator=(const Status& rhs);
  26. Status(Status&& rhs) noexcept : state_(rhs.state_) { rhs.state_ = nullptr; }
  27. Status& operator=(Status&& rhs) noexcept;
  28. // Return a success status.
  29. static Status OK() { return Status(); }
  30. // Return error status of an appropriate type.
  31. static Status NotFound(const Slice& msg, const Slice& msg2 = Slice()) {
  32. return Status(kNotFound, msg, msg2);
  33. }
  34. static Status Corruption(const Slice& msg, const Slice& msg2 = Slice()) {
  35. return Status(kCorruption, msg, msg2);
  36. }
  37. static Status NotSupported(const Slice& msg, const Slice& msg2 = Slice()) {
  38. return Status(kNotSupported, msg, msg2);
  39. }
  40. static Status InvalidArgument(const Slice& msg, const Slice& msg2 = Slice()) {
  41. return Status(kInvalidArgument, msg, msg2);
  42. }
  43. static Status IOError(const Slice& msg, const Slice& msg2 = Slice()) {
  44. return Status(kIOError, msg, msg2);
  45. }
  46. // Returns true iff the status indicates success.
  47. bool ok() const { return (state_ == nullptr); }
  48. // Returns true iff the status indicates a NotFound error.
  49. bool IsNotFound() const { return code() == kNotFound; }
  50. // Returns true iff the status indicates a Corruption error.
  51. bool IsCorruption() const { return code() == kCorruption; }
  52. // Returns true iff the status indicates an IOError.
  53. bool IsIOError() const { return code() == kIOError; }
  54. // Returns true iff the status indicates a NotSupportedError.
  55. bool IsNotSupportedError() const { return code() == kNotSupported; }
  56. // Returns true iff the status indicates an InvalidArgument.
  57. bool IsInvalidArgument() const { return code() == kInvalidArgument; }
  58. // Return a string representation of this status suitable for printing.
  59. // Returns the string "OK" for success.
  60. std::string ToString() const;
  61. private:
  62. // OK status has a null state_. Otherwise, state_ is a new[] array
  63. // of the following form:
  64. // state_[0..3] == length of message
  65. // state_[4] == code
  66. // state_[5..] == message
  67. const char* state_;
  68. enum Code {
  69. kOk = 0,
  70. kNotFound = 1,
  71. kCorruption = 2,
  72. kNotSupported = 3,
  73. kInvalidArgument = 4,
  74. kIOError = 5
  75. };
  76. Code code() const {
  77. return (state_ == nullptr) ? kOk : static_cast<Code>(state_[4]);
  78. }
  79. Status(Code code, const Slice& msg, const Slice& msg2);
  80. static const char* CopyState(const char* s);
  81. };
  82. inline Status::Status(const Status& rhs) {
  83. state_ = (rhs.state_ == nullptr) ? nullptr : CopyState(rhs.state_);
  84. }
  85. inline Status& Status::operator=(const Status& rhs) {
  86. // The following condition catches both aliasing (when this == &rhs),
  87. // and the common case where both rhs and *this are ok.
  88. if (state_ != rhs.state_) {
  89. delete[] state_;
  90. state_ = (rhs.state_ == nullptr) ? nullptr : CopyState(rhs.state_);
  91. }
  92. return *this;
  93. }
  94. inline Status& Status::operator=(Status&& rhs) noexcept {
  95. std::swap(state_, rhs.state_);
  96. return *this;
  97. }
  98. } // namespace leveldb
  99. #endif // STORAGE_LEVELDB_INCLUDE_STATUS_H_