ippsmalloc failing with NULL return

[ipp_dev_bri]

Hello,

We are trying to allocate memory using the ippsmalloc_32fc() method.  We have found one case where the allocation is failing and the return value is NULL.  It is failing with the following size:

ippsMalloc_32fc(1024 * 50176);

Can someone please tell me why the above call is failing?

Thanks for your help!

[Ruqiu_C_Intel]

Just checked in my end(oneAPI 2025.0, Windows 10), looks everything is fine. 

Please share us your IPP version, compiler, OS, CPU, etc.  

[ipp_dev_bri]

Actually, the more accurate method call is as follows:

ippsMalloc_32fc(sizeof(Ipp32fc) * 1024 * 50176);

The IPP version being used is 2020.4.311.  The Windows OS version is Windows 10.  The compiler being used is Visual Studio 2017.  The build memory format is x64.  The CPU version is Intel I9-10980XE.

[Ruqiu_C_Intel]

Thank you for the information!

This function allocates memory block aligned to 64-byte boundary for elements of different data types in IPP document here:https://www.intel.com/content/www/us/en/docs/ipp/developer-guide-reference/2022-0/malloc-002.html

[Wobo · Accepted solution]

Hi,

in my understanding it is quite simple...most of such IPP functions are limited to 2GiB...with ippsMalloc_32fc(sizeof(Ipp32fc) * 1024 * 50176); you try to alloc 8 * 411041792 => 3.288.334.336 bytes...that is far beyond the 2GiB limit and cannot succeed.

Kind Regards