Access control method and apparatus

By mapping physical memory to CCL windows with unallocated physical memory in collection communication, the problem of unpredictable dynamic addresses of compute nodes is solved, achieving efficient memory access and communication while avoiding additional overhead.

CN122309438APending Publication Date: 2026-06-30HUAWEI TECH CO LTD
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Patent Information

Application Number
CN202411988234.1
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-30
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

In aggregated communication scenarios, the virtual addresses corresponding to dynamically allocated memory on computing nodes are unpredictable, leading to the need for additional data copying or communication overhead in existing technologies, which affects communication efficiency.

Method used

By mapping physical memory to CCL Windows that have not allocated physical memory and establishing a mapping relationship between I/O virtual addresses and physical addresses, other computing nodes can directly access the target physical memory, avoiding memory copying and communication overhead.

Benefits of technology

It improves the efficiency of collection communication, reduces system overhead, meets the requirement of pre-acquiring IO virtual addresses in collection communication, and avoids additional communication and memory copy overhead.

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Abstract

This application provides an access control method and apparatus. In this method, a computing node maps a target physical memory to a pre-created CCL Window, allowing other computing nodes to access the target physical memory based on the CCL Window's I / O virtual address information. This improves memory access efficiency, avoids additional communication overhead, and increases resource utilization.
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