https://community.intel.com/t5/Intel-Integrated-Performance/Mixing-memory-allocation-with-IPP-and-standard-C-malloc/m-p/892225#M11648 Great, you are welcome :) Fri, 29 Dec 2006 22:26:56 GMT Vladimir_Dudnik 2006-12-29T22:26:56Z https://community.intel.com/t5/Intel-Integrated-Performance/Mixing-memory-allocation-with-IPP-and-standard-C-malloc/m-p/892222#M11645 Hello everyone,<BR /><BR />I don't know much about the difference among memory allocation with ipp function, standard function or with c++ "new". Maybe a primitive question:<BR /><BR />I use IPP function (ippsMalloc_8u in this case) to allocate memories for a signal signal structure. On other places of the programm the standard C malloc is used again and STL objects like stack, queue are also used. I must say quite chaotic<IMG src="https://community.intel.com/ISN/Community/en-US/emoticons/emotion-4.gif" alt="Smiley with tongue out [:-P]" /><BR /><BR />Then the error will occur after the programm runs for a while and allocation and free memory with the hybrid methods are executed for many times. The programm will stop at the line of allocating memory with ippsMalloc_8u or sometimes at "new". It seems rather random as to where and when it happens. I am sure that I free properly all the memories I allocated. <BR />So I doubt it's maybe not allowed to mix memory allocation modes massively. Is there any such cautions as to Ipp allocation?<BR /><BR />The version I used is Ipp4.0. Does anyone has a similar question and can help out?<BR />Thanks<BR /> Fri, 29 Dec 2006 20:56:47 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Mixing-memory-allocation-with-IPP-and-standard-C-malloc/m-p/892222#M11645 binjian 2006-12-29T20:56:47Z https://community.intel.com/t5/Intel-Integrated-Performance/Mixing-memory-allocation-with-IPP-and-standard-C-malloc/m-p/892223#M11646 <P>Hello,</P> <P>the rule is simple:</P> <P>always use appropriate pair of funtion for allocating/delete memeory blocks. If some block was allocated with ippMalloc - you need to use ippFree to delete block, if block was allocated with CRT malloc/new call you need to use CRT free/delete functions. Never mix allocation/deleting API and you will have no problem (if you have no dynamic memory overruns in code).</P> <P>BTW, why did not you upgrade to IPP 5.1 (or IPP 5.2 beta, which is the latest availbale version)?</P> <P>Regards,<BR /> Vladimir</P> Fri, 29 Dec 2006 21:12:31 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Mixing-memory-allocation-with-IPP-and-standard-C-malloc/m-p/892223#M11646 Vladimir_Dudnik 2006-12-29T21:12:31Z https://community.intel.com/t5/Intel-Integrated-Performance/Mixing-memory-allocation-with-IPP-and-standard-C-malloc/m-p/892224#M11647 Hello Vladimir,<BR /><BR />thank you very much for your quick reply. It's all I want to know that there's no special rule for IPP allocation. <BR /><BR />We bought IPP 4.0 two years ago. Since then we've been satisfied with our version as to the part we needed. Anyway I'll take a look at the IPP 5.2.<BR /><BR />Regards,<BR />Binjian<BR /> Fri, 29 Dec 2006 21:36:40 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Mixing-memory-allocation-with-IPP-and-standard-C-malloc/m-p/892224#M11647 binjian 2006-12-29T21:36:40Z https://community.intel.com/t5/Intel-Integrated-Performance/Mixing-memory-allocation-with-IPP-and-standard-C-malloc/m-p/892225#M11648 Great, you are welcome :) Fri, 29 Dec 2006 22:26:56 GMT https://community.intel.com/t5/Intel-Integrated-Performance/Mixing-memory-allocation-with-IPP-and-standard-C-malloc/m-p/892225#M11648 Vladimir_Dudnik 2006-12-29T22:26:56Z