On 21.09.2010 20:28, Mariano Martinez Peck wrote:
:) Thanks Henry. Now SpaceTally new spaceForInstancesOf: SparseLargeTable withInstanceCount: 2 ->> 18748
So....I guess I should commit the fix for SpaceTally >> spaceForInstancesOf: aClass withInstanceCount: instCount
shouldn't I ?
In addition, I modified SpaceTally >> printSpaceAnalysis: threshold on: aStream
from this:
printSpaceAnalysis: threshold on: aStream "SpaceTally new printSpaceAnalysis: 1 on:(FileStream forceNewFileNamed: 'STspace.text')"
"sd-This method should be rewrote to be more coherent within the rest of the class ie using preAllocate and spaceForInstanceOf:"
"If threshold > 0, then only those classes with more than that number of instances will be shown, and they will be sorted by total instance space. If threshold = 0, then all classes will appear, sorted by name."
| totalCodeSpace totalInstCount totalInstSpace n totalPercent | Smalltalk garbageCollect. totalCodeSpace := totalInstCount := totalInstSpace := n := 0. results := OrderedCollection new: Smalltalk classNames size. 'Taking statistics...' displayProgressAt: Sensor cursorPoint from: 0 to: Smalltalk classNames size during: [:bar | (Smalltalk globals allClasses) do: [:cl | | codeSpace instCount instSpace eltSize | codeSpace := cl spaceUsed. bar value: (n := n+1). Smalltalk garbageCollectMost. instCount := cl instanceCount. instSpace := (cl indexIfCompact > 0 ifTrue: [4] ifFalse: [8])*instCount. "Object headers" cl isVariable ifTrue: [eltSize := cl isBytes ifTrue: [1] ifFalse: [4]. cl allInstancesDo: [:x | instSpace := instSpace + (x basicSize*eltSize)]] ifFalse: [instSpace := instSpace + (cl instSize*instCount*4)]. results add: (SpaceTallyItem analyzedClassName: cl name codeSize: codeSpace instanceCount: instCount spaceForInstances: instSpace). totalCodeSpace := totalCodeSpace + codeSpace. totalInstCount := totalInstCount + instCount. totalInstSpace := totalInstSpace + instSpace]]. totalPercent := 0.0.
"aStream timeStamp." aStream nextPutAll: ('Class' padded: #right to: 30 with: $ ); nextPutAll: ('code space' padded: #left to: 12 with: $ ); nextPutAll: ('# instances' padded: #left to: 12 with: $ ); nextPutAll: ('inst space' padded: #left to: 12 with: $ ); nextPutAll: ('percent' padded: #left to: 8 with: $ ); cr.
threshold > 0 ifTrue: [ "If inst count threshold > 0, then sort by space" results := (results select: [:s | s instanceCount >= threshold or: [s spaceForInstances > (totalInstSpace // 500)]]) asSortedCollection: [:s :s2 | s spaceForInstances > s2 spaceForInstances]].
results do: [:s | | percent | aStream nextPutAll: (s analyzedClassName padded: #right to: 30 with: $ ); nextPutAll: (s codeSize printString padded: #left to: 12 with: $ ); nextPutAll: (s instanceCount printString padded: #left to: 12 with: $ ); nextPutAll: (s spaceForInstances printString padded: #left to: 14 with: $ ). percent := s spaceForInstances*100.0/totalInstSpace roundTo: 0.1. totalPercent := totalPercent + percent. percent >= 0.1 ifTrue: [ aStream nextPutAll: (percent printString padded: #left to: 8 with: $ )]. aStream cr].
aStream cr; nextPutAll: ('Total' padded: #right to: 30 with: $ ); nextPutAll: (totalCodeSpace printString padded: #left to: 12 with: $ ); nextPutAll: (totalInstCount printString padded: #left to: 12 with: $ ); nextPutAll: (totalInstSpace printString padded: #left to: 14 with: $ ); nextPutAll: ((totalPercent roundTo: 0.1) printString padded: #left to: 8 with: $ ).
To this:
printSpaceAnalysis: threshold on: aStream "SpaceTally new printSpaceAnalysis: 1 on:(FileStream forceNewFileNamed: 'STspace.text')"
"sd-This method should be rewrote to be more coherent within the rest of the class ie using preAllocate and spaceForInstanceOf:"
"If threshold > 0, then only those classes with more than that number of instances will be shown, and they will be sorted by total instance space. If threshold = 0, then all classes will appear, sorted by name."
| totalCodeSpace totalInstCount totalInstSpace n totalPercent | Smalltalk garbageCollect. totalCodeSpace := totalInstCount := totalInstSpace := n := 0. results := OrderedCollection new: Smalltalk classNames size. 'Taking statistics...' displayProgressAt: Sensor cursorPoint from: 0 to: Smalltalk classNames size during: [:bar | (Smalltalk globals allClasses) do: [:cl | | codeSpace instCount instSpace eltSize | codeSpace := cl spaceUsed. bar value: (n := n+1). Smalltalk garbageCollectMost. instCount := cl instanceCount. instSpace := self spaceForInstancesOf: cl withInstanceCount: instCount. results add: (SpaceTallyItem analyzedClassName: cl name codeSize: codeSpace instanceCount: instCount spaceForInstances: instSpace). totalCodeSpace := totalCodeSpace + codeSpace. totalInstCount := totalInstCount + instCount. totalInstSpace := totalInstSpace + instSpace]]. totalPercent := 0.0.
"aStream timeStamp." aStream nextPutAll: ('Class' padded: #right to: 30 with: $ ); nextPutAll: ('code space' padded: #left to: 12 with: $ ); nextPutAll: ('# instances' padded: #left to: 12 with: $ ); nextPutAll: ('inst space' padded: #left to: 12 with: $ ); nextPutAll: ('percent' padded: #left to: 8 with: $ ); cr.
threshold > 0 ifTrue: [ "If inst count threshold > 0, then sort by space" results := (results select: [:s | s instanceCount >= threshold or: [s spaceForInstances > (totalInstSpace // 500)]]) asSortedCollection: [:s :s2 | s spaceForInstances > s2 spaceForInstances]].
results do: [:s | | percent | aStream nextPutAll: (s analyzedClassName padded: #right to: 30 with: $ ); nextPutAll: (s codeSize printString padded: #left to: 12 with: $ ); nextPutAll: (s instanceCount printString padded: #left to: 12 with: $ ); nextPutAll: (s spaceForInstances printString padded: #left to: 14 with: $ ). percent := s spaceForInstances*100.0/totalInstSpace roundTo: 0.1. totalPercent := totalPercent + percent. percent >= 0.1 ifTrue: [ aStream nextPutAll: (percent printString padded: #left to: 8 with: $ )]. aStream cr].
aStream cr; nextPutAll: ('Total' padded: #right to: 30 with: $ ); nextPutAll: (totalCodeSpace printString padded: #left to: 12 with: $ ); nextPutAll: (totalInstCount printString padded: #left to: 12 with: $ ); nextPutAll: (totalInstSpace printString padded: #left to: 14 with: $ ); nextPutAll: ((totalPercent roundTo: 0.1) printString padded: #left to: 8 with: $ ).
So....you agree with both changes?
Thanks!
Mariano
Cheers, Henry
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Sound good to me! Personally I'd also like some more refactoring, like rewriting spaceForInstancesOf: withInstanceCount into #spaceForInstancesOfClass: aClass, delegating to: #spaceFor: amount instancesOfClass: aFixedClass (private category?) #spaceForInstancesOfVariableClass: aVariableClass (private category?) That way you also move ugly instance counting out of the loop. Also, while you're at it, what about factoring out contentBytes > 255 ifTrue: [12] ifFalse: [isCompact ifTrue: [4] ifFalse: [8]. into, say, #headerBytesOfClass: aClass ? And really, wtf? An instance of a compact, variable class with more than 255 bytes in it will have a 12-byte header, while those with less will have a 4-byte header? Plus, setting a class with more than 63 instance variables will never have an effect, its instances will always have 12-byte headers? Cheers, Henry