NUMA感知的Linux共享存储 [英] NUMA-aware named shared memory for Linux
问题描述
Windows API提供了CreateFileMappingNuma函数(
The Windows API offers the CreateFileMappingNuma function (http://msdn.microsoft.com/en-us/library/windows/desktop/aa366539(v=vs.85).aspx) to create a named shared memory space on a specific NUMA node.
到目前为止，我还没有找到Linux的等效功能.
So far, I have not found an equivalent function for Linux.
我当前的方法如下:
- 分配命名共享内存(使用shm_open(...))
- 确定当前的NUMA节点(使用numa_move_pages(...))
- 将页面移动到目标节点(再次使用numa_move_pages(...))
有人知道更好的方法吗?
Does anyone know a better approach?
记录:我建议的实现确实按预期工作！
For the record: My proposed implementation does work as expected!
推荐答案
听起来不错.请注意，在您调用shm_open()/fruncate()时没有分配页面(不要忘记ftruncate()来设置大小！).内核仅创建了vma，并等待将来的代码访问以将页面故障转移到物理内存中.因此，在这种状态下调用numa_move_pages()大概会产生在相关NUMA节点中创建和填充新页面的作用.
That sounds right. Note that there are no pages allocated at the point where you call shm_open()/fruncate() (don't forget ftruncate() to set the size!). The kernel simply creates the vma and waits for future code accesses to fault the pages into physical memory. So calling numa_move_pages() in this state will presumably have the effect of creating and populating new pages in the relevant NUMA nodes.
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