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Dunno, never tried that. Afraid you just cannot address within the range as in x86 architecture the whole process address space is 4G only. :)
PS. Is it possible to have such a need?
To answer your question, then no, there'll probably be no reason for that much memory (yet). And I agree that a 32-bit process cannot address that much space. I'm thinking about future porting to x64 though.Quote:
Originally Posted by Igor Vartanov
I'm also always perplexed when a Windows API returns the result as a 64-bit LONGLONG variable and I have to cast it to a 32-bit LONG. Example is a file size. So, I thought, to save myself a hassle of dealing with this bottle neck in the future and start using 64-bit memory management now.
(You know, back in a day when all they had were 16-bit CPUs no one thought that a gigabyte of memory was even possible.)
Considering the moment of appearance of 486 CPU and contemporary RAM sizes afraid you should wait at least 3-4 years until you could afford such an allocation without any noticeable impact on OS. Hope that time will be enough to get some certain solution to your current perplexing.
I don't think so, Igor. For instance, the main Adobe After Effects CS5 process running in x64 address space can easily allocate 75% of my 8GB RAM. And Windows 7 runs fine at that.Quote:
Originally Posted by Igor Vartanov
Then once your mind is already set, just write a couple of code lines, build that for x64 and see if it works. I believe this is not your first time you get an answer of the sort, as this very common in the community. Nobody can know everything. ;)
On this reason I accustomed always do this step before asking. And you know, I never had a reason to ask anybody after. :)
Igor, I understand that. Unfortunately most times I don't have enough hours in a day to try it out ... and yes, I might be abusing this community by hoping that someone has already done that and may post it here and save me time. Because that is what I do when I browse through this forum and if I see something that someone is asking and I know how to help them, I do respond and issue my advice. On the other hand, I do not comment if I don't know the answer...Quote:
Originally Posted by Igor Vartanov
Why do you need to have so much memory in 1 malloc ?
Not on 32-bit platforms. But it can on 64-bit, yes.Quote:
Originally Posted by ahmd
Yep, this is very common. People tend to survive this their own ways. :)Quote:
most times I don't have enough hours in a day to try it out
You get it wrong way, I believe. It never was about abusing or something. It's just about obvious difference between "hoping somebody knows, possibly without any clue whether I should trust that knowing" and "knowing by experiment of my own". :)Quote:
I might be abusing this community by hoping
:) Might be good for you. Or might be not. As I already said, you get this forum mostly like "answering machine". While I do not. I comment when I feel like that. Hope this seems not very abusing... and you excuse my imperfection. ;)Quote:
On the other hand, I do not comment if I don't know the answer...
IMO, if there is more than 4GB attached (memory extensions) then it can be allocated even on 32 bit system. I think the limit is 2^36, if allocated with help of memory mapped files then this works, server datacenter edition is needed to have this I guess.
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Originally Posted by Skizmo
Quote:
Originally Posted by ahmd
I did an experiment with memory allocation and it seems like there's a limit in x86 address space. For some reason on my Windows 7 x64 system with 8GB of RAM I was able to allocate 0x5FFFFFFF bytes but for 0x6FFFFFFF bytes it failed. I also tried calling HeadAlloc and VirtualAlloc with the same negative result. So I guess it pays to code in x64 environment after all.Quote:
Originally Posted by cilu
Yes, I'm with you on that one. What I'm hoping for is to learn something that I don't already know. And, speaking of some flaky code off the web, I never take it at a face value and copy it one-to-one into my project. In most code samples just the idea is what matters.Quote:
Originally Posted by Igor Vartanov
Hah, this is one of those cases that I've never heard of. What are you talking about? It would be nice if it worked.Quote:
Originally Posted by Krishnaa