Module mmtk::policy::immix

Re-exports

• pub use immixspace::*;

Modules

• block
• defrag
• immixspace
• line

Macros

• validate 🔒

Constants

• BLOCK_ONLY
  Mark/sweep memory for block-level only
• DEFRAG
  Do we allow Immix to do defragmentation?
• DEFRAG_EVERY_BLOCK
  Mark every allocated block as defragmentation source before GC. (for debugging)
• DEFRAG_HEADROOM_PERCENT
  Percentage of heap size reserved for defragmentation. According to this paper, Immix works well with headroom between 1% to 3% of the heap size.
• MARK_LINE_AT_SCAN_TIME
  Mark lines when scanning objects. Otherwise, do it at mark time.
• MAX_IMMIX_OBJECT_SIZE
  The max object size for immix: half of a block
• NEVER_MOVE_OBJECTS
  In some cases/settings, Immix may never move objects. Currently we only have two cases where we move objects: 1. defrag, 2. nursery copy. If we do neither, we will not move objects. If we have other reasons to move objects, we need to add them here.
• PREFER_COPY_ON_NURSERY_GC
  If Immix is used as a nursery space, do we prefer copy?
• STRESS_DEFRAG
  Make every GC a defragment GC. (for debugging)

Functions

• validate_features 🔒