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My goal is to use pointer operations as much as possible duing the computation
due to heavy duty data accumulation problem inside the 3D buffer.
I already tried piecewise 2D array buffer to build 3D cube
but somehow I feel true 3D contiguous / memory alligned solution
might be faster and easy to handle.
From time to time though, I need to allocate more than 2 Gbytes of elements before
applying any IPP APIs.
Problem is that IPPMalloc() API accept 'int' type instead of 'long long' type.
Is there a way to solve this limitation when allocating huge contiguous memory?
Thanks in advance,
- Sunkyu Hwang
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Great, but not perfect, for example below program crashes badly
//////////////////////
int numElements = 1024 * 1024 * 1024;
unsigned short* dat = (unsigned short*)_aligned_malloc(numElements * sizeof(unsigned short), 32);
unsigned short* source = dat;
for(int i = 0; i < numElements; i++, source++)
{
(*source) = (i * 13) % 34;
}
_aligned_free(dat);
////////////////////// The below version works fine except we are under 2Gbyte quota /////////////
unsigned short* dat = ippsMalloc_16u(numElements);
unsigned short* source = dat;
for(int i = 0; i < numElements; i++, source++)
{
(*source) = (i * 13) % 34;
}
ippsFree(dat);
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The following API works fine from above problem, (My mistake!! )
unsigned short* dat = (unsigned short*)_aligned_malloc(numElements*sizeof(unsigned short), 32);
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Hi,
Thanks for sharing the code here. It looks it can work now. For ippsMalloc functions, it juse uses system malloc function call, besides that, it may pad a few bytes to make sure it provide 32-byte aligned address.
Thanks,
Chao
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