"

 COPYRIGHT (c) 1991 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

StandardSystemView subclass:#MemoryMonitor

	instanceVariableNames:'updateInterval updateBlock myProcess oldData newData freeData

		updateIndex org maxTotal minTotal dX newColor freeColor oldColor

		prevTotal prevFree prevFree2 prevOld scale'

	classVariableNames:''

	poolDictionaries:''

	category:'Interface-Tools'

!

!MemoryMonitor class methodsFor:'documentation'!

copyright

"

 COPYRIGHT (c) 1991 by Claus Gittinger

	      All Rights Reserved

 This software is furnished under a license and may be used

 only in accordance with the terms of that license and with the

 inclusion of the above copyright notice.   This software may not

 be provided or otherwise made available to, or used by, any

 other person.  No title to or ownership of the software is

 hereby transferred.

"

!

documentation

"

    Shows memory usage (oldspace + newspace). Simple, but useful.

    The numbers shown are:

	tot     total memory usage (i.e. allocated oldSpace + allocated newSpace)

		(does not include the second semispace and other help-areas,

		 such as the remembered set etc.)

	all     current oldSpace in use + newSpace in use

	new     current newSpace in use

	frl     free space in (fragmented) free lists

	fre     compact free area above the used oldSpace

	old     current oldSpace in use

	max,    extreme values of 'tot' since the monitor started

	min     (can be reset by typing 'r' in the view)

	t       tenure threshold

	I       incremental GC state

	weak    number of weak objects

	rem     size of rememberedSet

	minsc:  percent of newspace remaining after scavenge (worst case)

		(i.e. the minimum %% of scavenged objects)

	count   number of scavenges since system started

	%       percentage of live objects in newSpace after last scavenge

		(i.e. this is the garbage vs. living objects ratio of

		 newSpace objects after the last scavenge)

    the graphic shows:

	yellow  newSpace used

	green   free memory in freeLists

	white   oldSpace used

    the popupMenu offers GC functions; keyboard options are:

	'f' -> faster; 's' -> slower; 'r' -> reset min/max

"

! !

!MemoryMonitor class methodsFor:'defaults'!

defaultExtent

    ^ (200 @ 280)

!

defaultIcon

    |i|

    i := Image fromFile:'MemMonitor.xbm'.

    i notNil ifTrue:[^ i].

    ^ super defaultIcon

!

defaultLabel

    ^ 'Memory Monitor'

! !

!MemoryMonitor methodsFor:'destroying'!

destroy

    updateBlock notNil ifTrue:[

	Processor removeTimedBlock:updateBlock.

    ] ifFalse:[

	myProcess terminate.

	myProcess := nil

    ].

    oldData := newData := freeData := nil.

    super destroy

! !

!MemoryMonitor methodsFor:'drawing'!

redraw

    "redraw all"

    self clear.

    self redrawX:0 y:0 width:width height:height

!

redrawX:x y:y width:w height:h

    "redraw data"

    |total oldSpaceUsed newSpaceUsed freeMem lx startIdx endIdx

     right|

    shown ifFalse:[^ self].

    right := x + w - 1.

    right >= org ifTrue:[

	lx := x.

	lx < org ifTrue:[

	    lx := org

	].

	total := ObjectMemory symSpaceSize 

		 + ObjectMemory oldSpaceSize 

		 + ObjectMemory newSpaceSize.

	startIdx := (lx-org+1).

	startIdx < 1 ifTrue:[

	    startIdx := 1

	].

	endIdx := right-org+1.

	endIdx >= updateIndex ifTrue:[

	    endIdx := updateIndex-1.

	].

	dX := 0.

	startIdx to:endIdx do:[:i |

	    newSpaceUsed := newData at:i.

	    newSpaceUsed notNil ifTrue:[

		oldSpaceUsed := oldData at:i.

		freeMem := freeData at:i.

		self updateLineX:lx - dX

		       total:total 

		       old:oldSpaceUsed 

		       new:newSpaceUsed 

		       free:freeMem.

	    ].

	    lx := lx + 1

	]

    ].

    x < org ifTrue:[

	prevFree := prevFree2 := prevOld := prevTotal := nil.

	self updateNumbers.

    ]

!

updateDisplay

    "update picture; trigger next update"

    |total oldSpaceUsed newSpaceUsed freeMem oldSpaceSize

     gWidth shift scaleChange margin mustWait|

    shown ifTrue:[

        oldSpaceUsed := ObjectMemory oldSpaceUsed + ObjectMemory symSpaceUsed.

        newSpaceUsed := ObjectMemory newSpaceUsed.

        freeMem := ObjectMemory freeListSpace + (ObjectMemory oldSpaceSize - ObjectMemory oldSpaceUsed).

        oldSpaceSize := ObjectMemory oldSpaceSize + ObjectMemory symSpaceSize.

        total := oldSpaceSize + ObjectMemory newSpaceSize.

        scaleChange := false.

        ((total - freeMem) < minTotal) ifTrue:[

            minTotal := total - freeMem.

            scaleChange := true

        ].

        (total > maxTotal) ifTrue:[

            maxTotal := total.

            scaleChange := true

        ].

        oldData at:updateIndex put:oldSpaceSize. "/ oldSpaceUsed.

        newData at:updateIndex put:newSpaceUsed.

        freeData at:updateIndex put:freeMem.

        updateIndex := updateIndex + 1.

        scaleChange ifTrue:[

            scale := height asFloat / (maxTotal + 100000).

            self redraw

        ].

        gWidth := width - org.

        margin := 1.

        mustWait := false.

        ((updateIndex-1) >= (gWidth - margin)) ifTrue:[

"on slow displays, use:"

"/            shift := gWidth // 4.

"for smooth display, use:"

            shift := 1.

            oldData replaceFrom:1 with:oldData startingAt:shift+1.

            newData replaceFrom:1 with:newData startingAt:shift+1.

            freeData replaceFrom:1 with:freeData startingAt:shift+1.

            updateIndex := updateIndex - shift.

            dX := dX + shift.

            self catchExpose.

            self copyFrom:self 

                        x:(org + shift) y:0

                      toX:org y:0

                    width:(gWidth - shift - margin)

                   height:height.

            self clearRectangleX:(width - margin - shift) y:0 

                           width:shift height:height.

            mustWait := true.

        ].

        self updateLineX:(updateIndex - 1 + org - 1)

                   total:total 

                   old:oldSpaceSize "/ oldSpaceUsed

                   new:newSpaceUsed 

                   free:freeMem.

        self updateNumbers.

        self flush.

        mustWait ifTrue:[

            self waitForExpose.

        ]

    ].

    updateBlock notNil ifTrue:[

        Processor addTimedBlock:updateBlock afterSeconds:updateInterval

    ].

    "Modified: 18.12.1995 / 15:21:10 / cg"

!

updateLineX:x total:total old:oldSpaceSize new:newSpaceUsed free:freeMem

    |hNew hOld hFree y1 y2 y3|

    hNew := (newSpaceUsed * scale) asInteger.

    hOld := (oldSpaceSize * scale) // 2.

    hFree := (freeMem * scale) // 2.

    y1 := height - 1.

    y2 := y1 - hOld.

    self paint:oldColor.

    self displayLineFromX:x y:y1 toX:x y:y2.

    y3 := y1 - hFree.

    self paint:freeColor.

    self displayLineFromX:x y:y1 toX:x y:y3.

    y1 := y2 - hNew.

    self paint:newColor.

    self displayLineFromX:x y:y1 toX:x y:y2.

!

updateNumbers

    "redraw numbers.

     The values shown are:

	max:    maximum memory used since monitor started

	min:    minimum memory used since monitor started

	tot:    total memory used (overall oldSpace + overall newSpace)

	all:    current memory in use (oldSpace + newSpace)

	new:    current newSpace in use

	free:   current size of freelist in oldSpace

	old:    current oldSpace in use

	t:      current tenure age

	I:      IGC state

	weak:   number of weak arrays in the system

	rem     remembered set size

	lrem    lifo remembered set size

	minsc:  percent of newspace remaining after scavenge (worst case)

	irq:    max. interrupt delay

	count of scavenges / last scavenge survivor rate

    "

    |oldSpaceSize newSpaceSize memUsed oldMemUsed newMemUsed freeMem free2 

     y half s fontHeight total n|

    oldMemUsed := ObjectMemory oldSpaceUsed + ObjectMemory symSpaceUsed.

    newMemUsed := ObjectMemory newSpaceUsed.

    freeMem := ObjectMemory freeListSpace.

    oldSpaceSize := ObjectMemory oldSpaceSize + ObjectMemory symSpaceSize.

    newSpaceSize := ObjectMemory newSpaceSize.

    memUsed := oldMemUsed + newMemUsed "- freeMem".

    total := oldSpaceSize + newSpaceSize.

    free2 := ObjectMemory freeSpace.

    self paint:White on:Black.

    fontHeight := font height + font descent.

    half := height // 2 + font descent.

    y := half - (fontHeight * 5).

    total ~~ prevTotal ifTrue:[

	((total - freeMem) < minTotal) ifTrue:[

	    minTotal := total - freeMem.

	].

	(total > maxTotal) ifTrue:[

	    maxTotal := total.

	].

	s := 'max ' , ((maxTotal // 1024) printStringLeftPaddedTo:5) , 'k '.

	self displayOpaqueString:s x:0 y:font ascent.

	s := 'min ' , ((minTotal // 1024) printStringLeftPaddedTo:5) , 'k '.

	self displayOpaqueString:s x:0 y:(height - font descent).

	s := 'tot ' , ((total  // 1024) printStringLeftPaddedTo:5) , 'k '.

	self displayOpaqueString:s x:0 y:y.

	prevTotal := total.

    ].

    y := y + fontHeight.

    s := 'all ' , ((memUsed // 1024) printStringLeftPaddedTo:5) , 'k '.

    self displayOpaqueString:s x:0 y:y.

    y := y + fontHeight.

    self paint:newColor.

    s := 'new ' , ((newMemUsed // 1024) printStringLeftPaddedTo:5) , 'k '.

    self displayOpaqueString:s x:0 y:y.

    y := y + fontHeight.

    freeMem ~~ prevFree ifTrue:[

	self paint:freeColor.

	s := 'frl ' , ((freeMem // 1024) printStringLeftPaddedTo:5) , 'k '.

	self displayOpaqueString:s x:0 y:y.

	prevFree := freeMem.

    ].

    y := y + fontHeight.

    free2 ~~ prevFree2 ifTrue:[

	self paint:freeColor.

	s := 'fre ' , ((free2 // 1024) printStringLeftPaddedTo:5) , 'k '.

	self displayOpaqueString:s x:0 y:y.

	prevFree2 := free2.

    ].

    y := y + fontHeight.

    (oldMemUsed - freeMem) ~~ prevOld ifTrue:[

	self paint:oldColor.

	s := 'old ' , (((oldMemUsed - freeMem) // 1024) printStringLeftPaddedTo:5) , 'k '.

	self displayOpaqueString:s x:0 y:y.

	prevOld := (oldMemUsed - freeMem).

    ].

    "

     the following is internal - normally only interesting when debugging the VM

    "

    y := y + fontHeight.

    self paint:oldColor.

    s := 't:' , (ObjectMemory tenureAge printStringLeftPaddedTo:2) , ' '.

    s := s , ' I:' , (ObjectMemory incrementalGCPhase printStringLeftPaddedTo:2) , ' '.

    self displayOpaqueString:s x:0 y:y.

    y := y + fontHeight.

    s := 'weak: ' , (ObjectMemory numberOfWeakObjects printStringLeftPaddedTo:4).

    self displayOpaqueString:s x:0 y:y.

    y := y + fontHeight.

    s := 'rem: ' , (ObjectMemory rememberedSetSize printStringLeftPaddedTo:5).

    self displayOpaqueString:s x:0 y:y.

    y := y + fontHeight.

    s := 'lrem: ' , (ObjectMemory lifoRememberedSetSize printStringLeftPaddedTo:4 ifLarger:['****']).

    self displayOpaqueString:s x:0 y:y.

"/ does no longer make sense to show ....

"/    y := y + fontHeight.

"/    ObjectMemory runsSingleOldSpace ifTrue:[

"/        self displayOpaqueString:'single' x:0 y:(half + (fontHeight*4)).

"/    ].

    y := y + fontHeight.

    n := ObjectMemory minScavengeReclamation / ObjectMemory newSpaceSize * 100.0.

    n := 100 - n asInteger.

    s := 'minSc ', (n printStringLeftPaddedTo:3) , '%'.

    self displayOpaqueString:s x:0 y:y.

    y := y + fontHeight.

    n := ObjectMemory maxInterruptLatency.

    n notNil ifTrue:[

	s := 'irq ', (n printStringLeftPaddedTo:3) , ' ms'.

    ] ifFalse:[

	s := ''

    ].

    self displayOpaqueString:s x:0 y:y.

    y := y + fontHeight.

    n := ObjectMemory lastScavengeReclamation / ObjectMemory newSpaceSize * 100.0.

    n := 100 - n asInteger.

    s := (ObjectMemory scavengeCount printStringLeftPaddedTo:6)

	 , (n printStringLeftPaddedTo:3) , '%'.

    self displayOpaqueString:s x:0 y:y.

    "Created: 7.11.1995 / 14:48:16 / cg"

! !

!MemoryMonitor methodsFor:'events'!

keyPress:key x:x y:y

    key == $f ifTrue:[

	"faster"

	updateInterval := updateInterval / 2

    ].

    key == $s ifTrue:[

	"slower"

	updateInterval := updateInterval * 2

    ].

    key == $r ifTrue:[

	"reset max"

	maxTotal := prevTotal.

	scale := height asFloat / (maxTotal + 100000).

	self resetStatisticValues.

	self redraw.

    ]

    "Modified: 7.11.1995 / 17:45:13 / cg"

!

sizeChanged:how

    |nn no nf delta oldSize newSize|

    super sizeChanged:how.

    oldSize := oldData size.

    newSize := width-org+1.

    (newSize ~~ oldSize) ifTrue:[

	nn := Array new:newSize.

	no := Array new:newSize.

	nf := Array new:newSize.

	(newSize > oldSize) ifTrue:[

	    nn replaceFrom:1 to:oldSize with:newData.

	    no replaceFrom:1 to:oldSize with:oldData.

	    nf replaceFrom:1 to:oldSize with:freeData

	] ifFalse:[

	    delta := (oldSize - newSize).

	    nn replaceFrom:1 with:newData startingAt:delta+1.

	    no replaceFrom:1 with:oldData startingAt:delta+1.

	    nf replaceFrom:1 with:freeData startingAt:delta+1.

	    updateIndex > newSize ifTrue:[

		updateIndex := updateIndex - delta.

	    ]

	].

	newData := nn.

	oldData := no.

	freeData := nf.

	scale := height asFloat / (maxTotal + 100000).

    ].

    self clear.

    self redraw.

! !