Ton Roosendaal
fe036a0538
In Orange we've been fighting the past weeks with memory usage a lot... at the moment incredible huge scenes are being rendered, with multiple layers and all compositing, stressing limits of memory a lot. I had hoped that less frequently used blocks would be swapped away nicely, so fragmented memory could survive. Unfortunately (in OSX) the malloc range is limited to 2 GB only (upped half of address space). Other OS's have a limit too, but typically larger afaik. Now here's mmap to the rescue! It has a very nice feature to map to a virtual (non existing) file, allowing to allocate disk-mapped memory on the fly. For as long there's real memory it works nearly as fast as a regular malloc, and when you go to the swap boundary, it knows nicely what to swap first. The upcoming commit will use mmap for all large memory blocks, like the composit stack, render layers, lamp buffers and images. Tested here on my 1 GB system, and compositing huge images with a total of 2.5 gig still works acceptable here. :) http://www.blender.org/bf/memory.jpg This is a silly composit test, using 64 MB images with a load of nodes. Check the header print... the (2323.33M) is the mmap disk-cache in use. BTW: note that is still limited to the virtual address space of 4 GB. The new call is: MEM_mapalloc() Per definition, mmap() returns zero'ed memory, so a calloc isn't required. For Windows there's no mmap() available, but I'm pretty sure there's an equivalent. Windows gurus here are invited to insert that here in code! At the moment it's nicely ifdeffed, so for Windows the mmap defaults to a regular alloc.
Welcome to the fun world of open source. For instructions on building and installing Blender, please see the file named INSTALL. ---------------------.Blanguages and the .blender directory--------------------- The .blender directory holds various data files for Blender. In the 2.28a release those are the .Blanguages file containing a list of translations, the translations themselves and a default ttf font. Blender checks for the presence of this directory in several locations: - the current directory - your home directory - On OSX, the blender bundle is also checked - On Windows, the installation dir is checked. If you get a 'File ".Blanguages" not found' warning, try to copy the .blender dir to one of these locations (your home directory being recommended). -------------------------------------Links-------------------------------------- Getting Involved: http://www.blender.org/docs/get_involved.html Community: http://www.blender3d.org/Community/ Main blender development site: http://www.blender.org/ The Blender project homepage: http://projects.blender.org/projects/bf-blender/ Documentation: http://www.blender.org/modules.php?op=modload&name=documentation&file=index Bug tracker: http://projects.blender.org/tracker/?atid=125&group_id=9&func=browse Feature request tracker: http://projects.blender.org/tracker/?atid=128&group_id=9&func=browse