Re: [BLACKBOX] Illegal Memory Access with Windows 7 - Update

From: [at]} <Wojtek>
Date: Fri, 16 Aug 2013 10:50:14 -0400

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> Because the test asks for 1000 random allocations of average size 250
> MByte, no chance!

Why no chance? If "no chance", then the allocation should never succeed.
But it does succeed from time to time. Most of the time it does not.

I should rephrase my question. Fundamentally, the computer is
deterministic. You ask for 800 MB and you should either always get it or
never get it. But it looks like you you are getting it with certain
probability. So I am asking, what are the hidden variables that govern the
"yes/no" result?

If you could answer this question then you could perhaps determine what
"hidden variable" is biting you on your particular Windows-7 system.

W.



>
>
> The test was designed to test the robustness of the garbage collector, and
> the
> response of the system
> to excessive memory requests.
>
> I modified the test to report how much maximum memory was being allocated.
>
> BlackBox used to crash very severely on Windows 7 (only!). The patches
> (contributed by Oms, louwy, and probably others) seem to
> have reliably fixed that aspect of the problem.
>
>
> I modified the test to report how much maximum memory was being allocated.
> This
> reveals my remaining problem of only having access to half the memory
> on Windows 7 that I expect.
>
> Regards
>
> Robert
>
>
> On 16/08/2013 15:05, Wojtek Skulski wrote:
>>> Good allocations 4907
>>> Failed allocations 97493
>> It means that memory allocation succeeds in 5% of the cases. Anybody
>> knows
>> why it fails in the remaining 95%? What conditions are causing the
>> allocation to either fail or succeed?
>>
>> W.
>>
>>
>
>
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Received on Fri Aug 16 2013 - 16:50:14 UTC