Fcalva/cyclone
1
0
Fork 0
mirror of https://github.com/justinethier/cyclone.git synced 2025-07-15 00:37:35 +02:00
Code Issues Projects Releases Packages Wiki Activity Actions

WIP

Browse source
This commit is contained in:
Justin Ethier 2016-01-21 22:49:41 -05:00
parent 3edcf419a9
commit af8c49d96a
1 changed files with 6 additions and 6 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

12
docs/Garbage-Collector.md
View file

@ -158,27 +158,27 @@ The collector will update its status variable and then wait for all of the colle
During a GC cycle the collector thread transitions through the following states: During a GC cycle the collector thread transitions through the following states:
### Clear ### Clear
The collector swaps the values of the clear color (white) and the mark color (black). This is more efficient than modifying the color on each object in the heap. The collector then transitions to sync 1. The collector swaps the values of the clear color (white) and the mark color (black). This is more efficient than modifying the color on each object in the heap. The collector then transitions to sync 1. At this point no heap objects are marked, as demonstrated below:
<img src="images/gc-graph-clear.png" alt="Initial object graph"> <img src="images/gc-graph-clear.png" alt="Initial object graph">
### Mark ### Mark
The collector transitions to sync 2 and then async. At this point it marks the global variables and waits for the mutators to also transition to async. The collector transitions to sync 2 and then async. At this point it marks the global variables and waits for the mutators to also transition to async:
<img src="images/gc-graph-mark.png" alt="Initial object graph"> <img src="images/gc-graph-mark.png" alt="Initial object graph">
### Trace ### Trace
The collector finds all live objects using a breadth-first search and marks them black. The collector finds all live objects using a breadth-first search and marks them black:
<img src="images/gc-graph-trace.png" alt="Initial object graph"> <img src="images/gc-graph-trace.png" alt="Initial object graph">
### Sweep ### Sweep
The collector scans the heap and frees memory used by all white objects. If the heap is still low on memory at this point the heap will be increased in size. The collector scans the heap and frees memory used by all white objects:
Also, to ensure a complete collection data for any terminated threads is not freed until now.
<img src="images/gc-graph-sweep.png" alt="Initial object graph"> <img src="images/gc-graph-sweep.png" alt="Initial object graph">
If the heap is still low on memory at this point the heap will be increased in size. Also, to ensure a complete collection data for any terminated threads is not freed until now.
### Resting ### Resting
The collector cycle is complete and it rests until it is triggered again. The collector cycle is complete and it rests until it is triggered again.