Adem schrieb: >> The FastMM4 uses a LOCKed asm instruction for every memory allocation > or dis-allocation. This LOCK ensure that a memory is modified by only a > thread at a time. This is the same LOCKed asm function which is used > internally by Windows with its Critical Sections. Windows itself is told > not to be very multi-core friendly, because it does use a lot of > critical sections in its internal... Linux is much more advanced, and > scales pretty well on massive multi-core architectures. >> >> On a multi-core CPU, all cores just freeze in order to make this > LOCKed asm function threadsafe. If you have a lot of threads with more > than one CPU, the context of every CPU core has to be frozen, cleared, > all cores wait for the LOCKed asm instruction to complete, then the > context is to be retrieved, and execution continue.
This is not true since at least Pentium Pro times. A lock prefix causes no bus lock anymore but only a cache lock. _______________________________________________ fpc-devel maillist - fpc-devel@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-devel
