On Sun, 28 Feb 2010 13:45:05 +0100 casper....@sun.com wrote: > > >Hi, I've read some reports that calling mmap() on SMP systems can be > >slow. Solaris has quite a few memory allocators, which makes a bit > >hard to figure out the best memory allocation technique on SMP > >hardware. > > > >I have single threaded application, which allocates large chunks of > >memory (256K at a time) for caching data. This allocated memory can > >grow to several gigabytes in size. What do you think will give better > >performance on large SMP systems, calling mmap() or one of Solaris' > >general memory allocators? > > If you want to free the data, then mmap() is probably the only way to > do it; if you use a standard memory allocater, returning data will be > difficult.
OK thanks, I think this is a good argument for using mmap(). If the user wants to dynamically decrease upper limit of cache memory, I can call munmap() on cache pages and then rebuild hash table, without restarting the server process. _______________________________________________ opensolaris-code mailing list opensolaris-code@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/opensolaris-code
