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llvm / scudo / 7594924fc83032cb7c4fec0303c431a4370e898d
commit7594924fc83032cb7c4fec0303c431a4370e898d[log] [tgz]
authorChiaHungDuan <chiahungduan@google.com>Wed Oct 02 13:34:46 2024 -0700
committerCopybara-Service <copybara-worker@google.com>Wed Oct 02 13:43:34 2024 -0700
tree8f0a37170eb73b6914f0c5ab7b9651727b941e9b
parent35ab32eff2cffe87ac92291046a651ca666d65db [diff]
[scudo] Reduce unsuccessful attempts of page releasing (#110583)

We introduce a new strategy to track how many bytes are not released
because of the contraint of release interval. This will change the
`TryReleaseThreshold` adaptively so that we avoid releasing the same
pages multiple times (and wasting time on the case of no pages to
release).

On Android, the number of release attempts decreases 33% (572 to 382)
and the worst case drops from 251 to 33. At the same time, it maintains
almost the same RSS usage (with some improvements as well).

Note that in this CL, this is only applied to non small blocks. We will
bring the strategy to all the size classes later.

GitOrigin-RevId: 36dff0d011cc1cf5a41e7e0b30057206ea9fd6f9
1 file changed
tree: 8f0a37170eb73b6914f0c5ab7b9651727b941e9b
  1. fuzz/
  2. include/
  3. tests/
  4. tools/
  5. allocator_common.h
  6. allocator_config.def
  7. allocator_config.h
  8. allocator_config_wrapper.h
  9. atomic_helpers.h
  10. bytemap.h
  11. checksum.cpp
  12. checksum.h
  13. chunk.h
  14. combined.h
  15. common.cpp
  16. common.h
  17. condition_variable.h
  18. condition_variable_base.h
  19. condition_variable_linux.cpp
  20. condition_variable_linux.h
  21. crc32_hw.cpp
  22. flags.cpp
  23. flags.h
  24. flags.inc
  25. flags_parser.cpp
  26. flags_parser.h
  27. fuchsia.cpp
  28. fuchsia.h
  29. internal_defs.h
  30. LICENSE.TXT
  31. linux.cpp
  32. linux.h
  33. list.h
  34. local_cache.h
  35. mem_map.cpp
  36. mem_map.h
  37. mem_map_base.h
  38. mem_map_fuchsia.cpp
  39. mem_map_fuchsia.h
  40. mem_map_linux.cpp
  41. mem_map_linux.h
  42. memtag.h
  43. mutex.h
  44. options.h
  45. platform.h
  46. primary32.h
  47. primary64.h
  48. quarantine.h
  49. release.cpp
  50. release.h
  51. report.cpp
  52. report.h
  53. report_linux.cpp
  54. report_linux.h
  55. secondary.h
  56. size_class_map.h
  57. stack_depot.h
  58. stats.h
  59. string_utils.cpp
  60. string_utils.h
  61. thread_annotations.h
  62. timing.cpp
  63. timing.h
  64. trusty.cpp
  65. trusty.h
  66. tsd.h
  67. tsd_exclusive.h
  68. tsd_shared.h
  69. vector.h
  70. wrappers_c.cpp
  71. wrappers_c.h
  72. wrappers_c.inc
  73. wrappers_c_bionic.cpp
  74. wrappers_c_checks.h
  75. wrappers_cpp.cpp