[boost] [quick_allocator] false sharing on SMP

Pavel Vozenilek asked to repost this here, so here it is: http://groups.google.com/group/comp.lang.c++.moderated/msg/2b85fdcd20239a52 I just skimmed through boost/detail/quick_allocator.hpp and noticed that quick_allocator causes false sharing on SMP. It happens when several counters are allocated within the same cache line and those counters are used by different processors, thus thrashing processors' cache lines when the counter is written, even when the counter is used by a single processor only. More information about allocators and false sharing can be found in papers included with Hoard allocator sources. http://hoard.org/ -- Maxim Yegorushkin