[Vm-dev] VM Maker: VMMaker.oscog-eem.407.mcz

[commits at source.squeak.org]

Eliot Miranda uploaded a new version of VMMaker to project VM Maker:
http://source.squeak.org/VMMaker/VMMaker.oscog-eem.407.mcz

==================== Summary ====================

Name: VMMaker.oscog-eem.407
Author: eem
Time: 24 September 2013, 1:26:38.972 pm
UUID: dc40b325-054d-4337-8d8b-a6402f3845ad
Ancestors: VMMaker.oscog-eem.406

Comment SpurGenerationScavenger

=============== Diff against VMMaker.oscog-eem.406 ===============

Item was changed:
  CogClass subclass: #SpurGenerationScavenger
  	instanceVariableNames: 'coInterpreter manager eden futureSpace pastSpace futureSurvivorStart rememberedSet rememberedSetSize tenuringThreshold tenuringProportion'
  	classVariableNames: 'RememberedSetLimit RememberedSetRedZone'
  	poolDictionaries: ''
  	category: 'VMMaker-SpurMemoryManager'!
+ 
+ !SpurGenerationScavenger commentStamp: 'eem 9/24/2013 13:04' prior: 0!
+ SpurGenerationScavenger is an implementation of David Ungar's Generation Scavenging garbage collection algorithm.  See
+ 	Generation Scavenging, A Non-disruptive, High-Performance Storage Reclamation Algorithm
+ 	David Ungar
+ 	Proceeding
+ 	SDE 1 Proceedings of the first ACM SIGSOFT/SIGPLAN software engineering symposium on Practical software development environments
+ 	Pages 157 - 167 
+ 	ACM New York, NY, USA ©1984 
+ 	ISBN:0-89791-131-8
+ 
+ Also relevant are
+ 	An adaptive tenuring policy for generation scavengers
+ 	David Ungar & Frank Jackson
+ 	ACM Transactions on Programming Languages and Systems (TOPLAS) TOPLAS Homepage archive
+ 	Volume 14 Issue 1, Jan. 1992 
+ 	Pages 1 - 27 
+ 	ACM New York, NY, USA
+ 
+ Instance Variables
+ 	coInterpreter:			<StackInterpreterSimulator|CogVMSimulator>
+ 	eden:					<SpurNewSpaceSpace>
+ 	futureSpace:			<SpurNewSpaceSpace>
+ 	futureSurvivorStart:		<Integer address>
+ 	manager:				<SpurMemoryManager|Spur32BitMMLESimulator et al>
+ 	pastSpace:				<SpurNewSpaceSpace>
+ 	rememberedSet:		<CArrayAccessor on: Array>
+ 	rememberedSetSize:	<Integer>
+ 	tenuringProportion:		<Float>
+ 	tenuringThreshold:		<Integer address>
+ 
+ coInterpreter
+ 	- the interpreter/vm, in this context, the mutator
+ 
+ eden
+ 	- the space containing newly created objects
+ 
+ futureSpace
+ 	- the space to which surviving objects are copied during a scavenge
+ 
+ futureSurvivorStart
+ 	- the allocation pointer into futureSpace
+ 
+ manager
+ 	- the Spur memory manager
+ 
+ pastSpace
+ 	- the space surviving objects live in until the next scavenge
+ 
+ rememberedSet
+ 	- the root old space objects that refer to objects in new space; a scavenge starts form these roots and the interpreter's stack
+ 
+ rememberedSetSize
+ 	- the size of the remembered set, also the first unused index in the rememberedSet
+ 
+ tenuringProportion
+ 	- the amount of pastSpace below which the system will not tenure unless futureSpace fills up, and above which it will eagerly tenure
+ 
+ tenuringThreshold
+ 	- the pointer into pastSpace below which objects will be tenured
+ !

Item was added:
+ ----- Method: SpurMemoryManager>>endOfMemory (in category 'accessing') -----
+ endOfMemory
+ 	^endOfMemory!