Hans-Peter Diettrich schrieb: > Thaddy schrieb: >> Hans-Peter Diettrich wrote: >>> >>> Memory management can not normally be parallelized. >>> >> What's this then: http://topsoftwaresite.nl/ You are talking cows dung. >> It is actually in production at one of the largest stockbrokers in >> Europe. >> You should have written : "It is hard to do parallization" > > My point is: when multiple threads try to acquire an new memory block at > the same time, and they happen to find the same gap, then only one of > these can win. The other threads must continue or - in the worst case - > restart their search for the next matching gap. > > So IMO only a low *chance* for such concurrent tries can result in > *typically* better performance of such a memory management model. With > increasing memory fragmentation the collision chance increases as well.
Just look at the FPC memory manager: to avoid this some structures like the freelist are thread specific. _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
