我通过分享记忆,分享多个进程的一些数据;我利用不同进程之间的相互经验实现同步。
My question is the following: is it possible to use lock-free data structures AND/OR atomic operations to achieve faster synchronization without using mutexes between 2 processes?
如果没有,你会知道这样做的主要原因是什么?
它们只用于同步推进同一进程。 这些概念是否也能够适应进程? 如果是没有数据,你知道在各种过程之间分享/同步数据的任何更快的方法?
这些概念是否也能够适应进程?
Yes, atomic operations are universal both for threads and processes, IIF the memory atomically used is shared.
Atomic operation is specific instruction of processor itself and in knows nothing about threads or processes, it is just All-or-nothing (indivisible) complex of actions (read; compare; store) with low-level hardware implementation.
因此,你可以在不同进程之间树立共同的记忆,把原子的东西放在其中。
无锁定
Yes, if 无锁定is implemented only with atomic. (It should)
数据结构
你们应当核实,共享记忆在两个过程(在数据结构中)的同一地址。
如果记忆被绘制成不同的地址,则点数将在另一个过程中打破。 在这种情况下,你需要使用相对地址,并做简单的记忆翻译。
1. 相互程序
我要说的是,glibc>2.4(NPTL)使用futex和原子操作作为非连续锁(用于程序共享面值=过程间歇)。 因此,你已经在共同记忆中利用原子行动。
On x86 with NPTL, most of the synchronization primitives have as their fast path just a single interlocked operation with a full memory barrier. Since x86 platforms don t really have anything lighter than that, they are already about the best you can do. Unless the existing atomic operations do exactly what you need to do, there will be no performance boost to pay back the costs of using the semantically lighter primitive.
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