LibTiff Mailing List
TIFF and LibTiff Mailing List Archive
November 2008
Previous Thread
Next Thread
Previous by Thread
Next by Thread
Previous by Date
Next by Date
Contact
The TIFF Mailing List Homepage
This list is run by Frank Warmerdam
Archive maintained by AWare Systems
Thread
2008.11.14 21:37 "Re: Memory leak (TIFFOpen, TIFFReadTile)?", by Craig Bruce
Frank Warmerdam <warmerdam@pobox.com> wrote: > It really sounds like you are mixup up process size with heap memory use. > Many tools that report a processes size will also report all the memory > currently used by pages of a disk file that are paged into memory as part > of the io subsystem. This is not real heap use, and the memory will be > released by the operating system as soon as it is needed for something > else. Till then the disk pages are left in memory in case they are needed > again. This is consistent with the memory use dropping on close. I have found that memory-mapped I/O is completely FUBARed, even on Linux. Even if the kernel is ultimately going to release the memory, the system still thrashes like crazy. It really shouldn't be the default mode for TIFFOpen(). To avoid this problem, I call TIFFOpen() with a mode of "rCm". This makes image reading work as expected. --------------------------+----------------------+-------------------------- Dr. Craig S. Bruce | Ph 819-771-8303 x205 | CubeWerx Inc. Senior Software Developer | Fax 819-771-8388 | Gatineau, Québec, Canada csbruce@cubewerx.com | http://csbruce.com/ | http://www.cubewerx.com/ --------------------------+----------------------+-------------------------- "Given enough time and money, eventually Microsoft will re-invent Unix."