SMP Primer for Android 1.In this document Theory Memory consistency models Processor consistency CPU cache behavior Observability ARM’s weak ordering Data memory barriers Store/store and load/load Load/store and store/load Barrier instructions Addres…
先引入cppreference中的描述: Atomic operations tagged memory_order_seq_cst not only order memory the same way as release/acquire ordering (everything that happened-before a store in one thread becomes a visible side effect in the thread that did a load), but…
Linux has supported a large number of SMP systems based on a variety of CPUs since the 2.0 kernel. Linux has done an excellent job of abstracting away differences among these CPUs, even in kernel code. One important difference is how CPUs allow memor…
概念: 摘录自:http://preshing.com/20120913/acquire-and-release-semantics/ Acquire semantics is a property which can only apply to operations which read from shared memory, whether they are read-modify-write operations or plain loads. The operation is then…
The JSR-133 Cookbook for Compiler Writers by Doug Lea, with help from members of the JMM mailing list. dl@cs.oswego.edu. Preface: Over the 10+ years since this was initially written, many processor and language memory model specifications and issues…
A data processor supports the use of multiple memory models by computer programs. At a device external to a data processor, such as a memory controller, memory transactions requests are received from the data processor. Each memory transaction reques…
