[Vm-dev] [Pharo-dev] shallowCopy problem on 64 bit Pharo ?

[Bert Freudenberg]

I would try logging the number of incremental and full GCs along with the
failures. Just a hunch (the prim might fail for OOM).

- Bert -

On Tue, Feb 7, 2017 at 2:21 PM, Ciprian Teodorov <ciprian.teodorov at gmail.com
> wrote:

>
> interesting I have a similar behavior with your experiment
> with distance variations globally between 16 and 25
>
> cheers,
> cip
>
> On Tue, Feb 7, 2017 at 6:51 AM, Ben Coman <btc at openinworld.com> wrote:
>
>>
>>
>> Try the following experiment.
>> Copy Object>>shallowCopy to Object>>monitorShallowCopy
>> and after the pragma add...
>>      Smalltalk at: #Monitor put: #Failed.
>>
>>
>> Then in Playground...
>>     lastfail := 0.
>>     1 to: 100000 do: [ :n |
>> |src copy|
>> src := Array new: n.
>> Smalltalk at: #Monitor put: #Succeeded.
>> copy := src monitorShallowCopy.
>> (Smalltalk at: #Monitor) == #Failed ifTrue: [
>> Transcript crShow: n; tab; show: n - lastfail.
>> lastfail := n.
>> ].
>> ].
>>
>> Produces the following interesting result....
>>
>> RUN1...
>>
>> 65559 65559
>> 67670 2111
>> 67685 15
>> 67700 15
>> 67715 15
>> 67730 15
>> ...
>>
>
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