[Vm-dev] VM Maker: Cog-eem.98.mcz

[commits at source.squeak.org]

Eliot Miranda uploaded a new version of Cog to project VM Maker:
http://source.squeak.org/VMMaker/Cog-eem.98.mcz

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

Name: Cog-eem.98
Author: eem
Time: 21 September 2013, 7:41:44.069 am
UUID: 8027e935-f7b0-417a-be44-954c5765582d
Ancestors: Cog-eem.97

fix a couple of comments

=============== Diff against Cog-eem.97 ===============

Item was changed:
  ----- Method: SpurBootstrap class>>SmalltalkImagePROTOTYPEsetGCParameters (in category 'method prototypes') -----
  SmalltalkImagePROTOTYPEsetGCParameters
  	"Adjust the VM's default GC parameters to avoid too much tenuring.
  	 Maybe this should be left to the VM?"
  
  	| proportion edenSize survivorSize averageObjectSize numObjects |
  	proportion := 0.9. "tenure when 90% of pastSpace is full"
  	edenSize := SmalltalkImage current vmParameterAt: 44.
+ 	survivorSize := edenSize / 5.0. "David's paper uses 140Kb eden + 2 x 28kb survivor spaces; Spur uses the same ratios :-)"
- 	survivorSize := edenSize / 5.0. "David's paper uses 140Kb eden + 2 x 28kb survivor spaces; Spur does the same :-)"
  	averageObjectSize := 8 * self wordSize. "a good approximation"
  	numObjects := (proportion * survivorSize / averageObjectSize) rounded.
  	SmalltalkImage current vmParameterAt: 6 put: numObjects  "tenure when more than this many objects survive the GC"!

Item was changed:
  ----- Method: SpurBootstrap class>>SystemDictionaryPROTOTYPEsetGCParameters (in category 'method prototypes') -----
  SystemDictionaryPROTOTYPEsetGCParameters
  	"Adjust the VM's default GC parameters to avoid too much tenuring.
  	 Maybe this should be left to the VM?"
  
  	| proportion edenSize survivorSize averageObjectSize numObjects |
  	proportion := 0.9. "tenure when 90% of pastSpace is full"
  	edenSize := SmalltalkImage current vmParameterAt: 44.
+ 	survivorSize := edenSize / 5.0. "David's paper uses 140Kb eden + 2 x 28kb survivor spaces; Spur uses the same ratios :-)"
- 	survivorSize := edenSize / 5.0. "David's paper uses 140Kb eden + 2 x 28kb survivor spaces; Spur does the same :-)"
  	averageObjectSize := 8 * self wordSize. "a good approximation"
  	numObjects := (proportion * survivorSize / averageObjectSize) rounded.
  	SmalltalkImage current vmParameterAt: 6 put: numObjects  "tenure when more than this many objects survive the GC"!