huge vector

[Simon Adler]

Hello,

I've got some Problems with a Programm.
I use a Grid with Nodes. The Grid will be 64 * 64 Nodes huge.
Each Node is a float. Some Algorithms ha've to copy the whole
Grid, sometimes twice. If this happens, the code crashes. I've
to choose a smaller Grid Spacing from 32 * 32 Grid Nodes, or less.

Who can I use more Memory?
I use vector, just because I read that indexed access is fast.
An Ordinary float * is possible, but the Program crashes earlier.
I've no Memory Leaks, I guess!

Thanks for any Help!

Simon

 

[Attila Feher]

Hello,

I've got some Problems with a Programm.
I use a Grid with Nodes. The Grid will be 64 * 64 Nodes huge.
Each Node is a float. Some Algorithms ha've to copy the whole
Grid, sometimes twice. If this happens, the code crashes. I've
to choose a smaller Grid Spacing from 32 * 32 Grid Nodes, or less.

Who can I use more Memory?
I use vector, just because I read that indexed access is fast.
An Ordinary float * is possible, but the Program crashes earlier.
I've no Memory Leaks, I guess!

In short: Please post code!

Medium: Talk is cheap, show me the code!

Politically Correct: Please post the smallest compilable code experiencing
the error.

Sacred cows make great hamburgers.

I did not know they can cook.

 

[Peter van Merkerk]

Hello,

I've got some Problems with a Programm.
I use a Grid with Nodes. The Grid will be 64 * 64 Nodes huge.
Each Node is a float. Some Algorithms ha've to copy the whole
Grid, sometimes twice. If this happens, the code crashes. I've
to choose a smaller Grid Spacing from 32 * 32 Grid Nodes, or less.

Who can I use more Memory?
I use vector, just because I read that indexed access is fast.
An Ordinary float * is possible, but the Program crashes earlier.
I've no Memory Leaks, I guess!

Thanks for any Help!

How do you expect us to help you if you don't show any code that causes
the crash? Please post the smallest, complete and compilable program
that exhibits your problem.

See also:
http://www.slack.net/~shiva/welcome.txt


BTW: 64 * 64 floats doesn't occupy that much memory so probably the
problem has nothing to do with using too much memory.

 

[John Harrison]

Hello,

I've got some Problems with a Programm.
I use a Grid with Nodes. The Grid will be 64 * 64 Nodes huge.
Each Node is a float. Some Algorithms ha've to copy the whole
Grid, sometimes twice. If this happens, the code crashes. I've
to choose a smaller Grid Spacing from 32 * 32 Grid Nodes, or less.

I think you have a bug in your program.

Who can I use more Memory?

64*64*sizeof(float) is not a lot of memory, I don't think that is your
problem.

I use vector, just because I read that indexed access is fast.
An Ordinary float * is possible, but the Program crashes earlier.

Right, you have a bug somewhere, probably nothing to do with the size of the
vector.

I've no Memory Leaks, I guess!

Guessing isn't good enough. But this doesn't sound like a memory leak, it
sounds like a plain old bug.

Thanks for any Help!

Post some code, if it's not too much.

john

 

[Niels Dybdahl]

I've got some Problems with a Programm.

I use a Grid with Nodes. The Grid will be 64 * 64 Nodes huge.
Each Node is a float. Some Algorithms ha've to copy the whole
Grid, sometimes twice. If this happens, the code crashes. I've
to choose a smaller Grid Spacing from 32 * 32 Grid Nodes, or less.

Who can I use more Memory?
I use vector, just because I read that indexed access is fast.
An Ordinary float * is possible, but the Program crashes earlier.
I've no Memory Leaks, I guess!

64x64xfloat is not very much (32 KB). So there is clearly a bug in your
code.
You have to post some code to get specific help.
Otherwise try to use a debugger and/or a boundschecker.

Niels Dybdahl

 

[JKop]

Simon Adler posted:

Hello,

I've got some Problems with a Programm.
I use a Grid with Nodes. The Grid will be 64 * 64 Nodes huge.
Each Node is a float. Some Algorithms ha've to copy the whole
Grid, sometimes twice. If this happens, the code crashes. I've
to choose a smaller Grid Spacing from 32 * 32 Grid Nodes, or less.

Who can I use more Memory?
I use vector, just because I read that indexed access is fast.
An Ordinary float * is possible, but the Program crashes earlier.
I've no Memory Leaks, I guess!

Thanks for any Help!

Simon

Line 15, you misspelled "vector".


-JKop