[Vm-dev] #becomeUncompact not longer works in Cog/Stack VMs

[Igor Stasenko]

On 6 May 2011 21:51, Eliot Miranda <eliot.miranda at gmail.com> wrote:
>
>
>
> On Fri, May 6, 2011 at 12:47 PM, Igor Stasenko <siguctua at gmail.com> wrote:
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>> On 6 May 2011 20:04, Eliot Miranda <eliot.miranda at gmail.com> wrote:
>> >
>> > and your point would be?
>> >
>> it needs to be fixed.
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> No.  It does /not/ need to be fixed.  As I said earlier it is *absurd* to throw away performance for the ability to change certain classes to become uncompact.

No. its nothing to do with performance. It is about getting rid of
them as a concept.

>>
>> Because if we can't do:
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>> Smalltalk compactClassesArray do: [:each | each ifNotNil: [each
>> becomeUncompact]].
>>
>> then we cant:
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>> VM getRidOfCompactClassesNotion
>>
>> :)
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>
> That will be done by producing a new GC and a new image format, not by tinkering with compact classes in the current GC.  Right?
>

yes.. but small steps at a time.

Дорогу одолеет идущий.

(its hard to me to translate this but if translate it literally, it means):
'road' 'overcome' 'walking one'

>>
>> > On Fri, May 6, 2011 at 9:38 AM, Igor Stasenko <siguctua at gmail.com> wrote:
>> >>
>> >> Hi, i tried to do a simple:
>> >>
>> >> Smalltalk compactClassesArray do: [:each | each ifNotNil: [each
>> >> becomeUncompact]]
>> >>
>> >> and it crashing the image.
>> >> I tried to do this for individual classes.
>> >>
>> >>
>> >> CompiledMethod, ByteString, BlockClosure, BlockContext ,
>> >>  seems working ok.
>> >>
>> >> MethodContext, LargePositiveInteger, LargeNegativeInteger, Float
>> >> crashes the image.
>> >>
>> >> i also tried following:
>> >>
>> >> [Smalltalk compactClassesArray do: [:each | each ifNotNil: [each
>> >> becomeUncompact]]
>> >> ] forkAt: Processor highestPriority
>> >>
>> >> but it didn't helped much.
>> >>
>> >> Also, i saved image after couple successfull #becomeUncompact steps..
>> >> and now VM cannot open image, most probably
>> >> because it fails on 'assumptions check' defined in #checkAssumedCompactClasses
>> >>
>> >> --
>> >> Best regards,
>> >> Igor Stasenko AKA sig.
>> >
>> >
>> >
>>
>>
>>
>> --
>> Best regards,
>> Igor Stasenko AKA sig.
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>
>



-- 
Best regards,
Igor Stasenko AKA sig.