site_archiver@lists.apple.com Delivered-To: pro-apps-dev@lists.apple.com Thread-topic: Question about growing memory problem with our plug-in User-agent: Microsoft-MacOutlook/14.7.7.170905 I'm having one heck of a time with my analysis pass plug-in that we're creating. If I get an FxImage, copy the image to my own memory, dealloc the FxImage, then process, then get another FxImage, copy, deallocate, then process, in the same thread… then all goes fine. Well our analysis works about as fast as a CPU memory fetch of an FxImage, so I figured I would get images on the main thread, and process on another thread. So now I get an FxImage then copy, then "throw" over to another thread for processing, then concurrently (on the main thread) get another FxImage. Repeat. Goes about 2x as fast, as you might expect. EXCEPT All goes fine for about 500 frames. Then all of a sudden kernel_task starts to grow memory by leaps and bounds. Before 500 frames, kernel_task is at 3Gb of memory usage, FCP is at about 1.2Gb. Both remain approximately constant Then memory continues to grow for kernel_task, while FCP stays constant (at about 1.2Gb). Over the course of 80 frames or so, kernel_task grows from 3Gb of usage to over 35Gb. Then I get a system error message (not a crash in my plug-in or FCP), that "System has run out of Application Memory". Oy. I read this is related to virtual memory become scarce. Crap. I KNOW I don't have a memory leak in my code (it's code we've used for YEARS and have analyzed it's memory usage quite rigorously). And the code works if the frame retrieval and processing is in the same thread. Of course we allocate and release memory in our plug-in using malloc, but the memory allocations and deallocations are all balanced. I thought maybe there's some issue with concurrent memory allocations by FCP and our plug-in, but malloc and other memory routines are supposed to be thread safe. So perhaps some memory fragmentation? But wouldn't that probably happen even if our processing is happening in line (and in the same thread) as the frame retrieval? Anyone have any ideas? Bueller? Pete _______________________________________________ Do not post admin requests to the list. They will be ignored. Pro-apps-dev mailing list (Pro-apps-dev@lists.apple.com) Help/Unsubscribe/Update your Subscription: https://lists.apple.com/mailman/options/pro-apps-dev/site_archiver%40lists.a... This email sent to site_archiver@lists.apple.com