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external-cannbot-ops-npu-arch

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Ascend NPU 架构知识查询技能。通过芯片型号映射、架构代际划分和 archXX 特性说明，帮助判断目标平台能力、特性支持与条件编译策略。当需要确认芯片型号、NpuArch/SocVersion、架构差异、特性支持或编译分支条件时使用。

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Ascend NPU 架构知识

架构代际概述

概念说明
NpuArch芯片架构号，定义指令集和微架构，运行时通过 GetCurNpuArch() 获取
SocVersion片上系统版本，软件命名标识，运行时通过 GetSocVersion() 获取
NPU_ARCHDevice 侧编译宏，四位数值，用于条件编译
archXX算子仓目录简写，取 DAV 编号前两位（如 DAV_3510 → arch35）
DAV_C310构建系统内部宏，等价于 NpuArch::DAV_3510 / arch35 / __NPU_ARCH__=3510，不可按数值推断

完整映射表

完整产品系列 / SocVersion / NpuArch / 芯片型号映射见 npu-hardware-params.md §0 产品映射表。

获取当前架构

#include "utils/tiling/platform/platform_ascendc.h"

auto ascendcPlatform = platform_ascendc::PlatformAscendC(context->GetPlatformInfo());
NpuArch npuArch = ascendcPlatform.GetCurNpuArch();         // DAV_2201 / DAV_3510 / ...
platform_ascendc::SocVersion socVer = ascendcPlatform.GetSocVersion();

GetCurNpuArch() 失败返回 NpuArch::DAV_RESV，GetSocVersion() 失败返回 SocVersion::RESERVED_VERSION。

DAV_3510 相对 DAV_2201 的关键变化

详细硬件参数真值见 references/npu-hardware-params.md。运行时必须以 PlatformAscendC 接口获取实际值，禁止硬编码。

Buffer（同架构内通常一致）

BufferDAV_2201DAV_3510
L0C128 KB256 KB
UB192 KB248 KB
BT1 KB4 KB

频率/核数/L2/Memory（因子型号/形态而异）

参数Ascend910B2 (DAV_2201)Ascend950PR PCIEAscend950PR Server
Cube 核数242832
频率1.8 GHz1.65 GHz1.65 GHz
L2192 MB112 MB128 MB
Memory64 GB112 GB128 GB

详见 典型SKU示例。

指令集与微架构

类别变化
数据格式新增 FP8 / MXFP8 / MXFP4 / HiF8 Cube MMAD
CV 直通通路新增 L0C→UB、UB→L1、SSBuffer 消息
同步机制BufferID 替代 set/wait 强配对
编程模型新增 SIMT、SIMD-Regbase、NDDMA、CCU 通算融合

Memory 带宽基于公开资料与经验值，详见 npu-hardware-params.md §4。

详细文档索引

references/ 按需加载：

  • npu-hardware-params.md — 硬件参数参考：各架构子型号一致参数、典型SKU示例、基于公开资料与经验值的规格
  • npu-arch-guide.md：
    • 典型硬件参数与获取方式：核数 / Buffer 容量典型值，GetCoreNumA* / GetCoreMemSize / aclrtGetDeviceInfo 接口用法（含硬编码反例）
    • DAV_3510 微架构：AI Core Buffer 层级、MTE 引擎、CV 数据通路改动、BufferID 同步
    • SIMT vs SIMD：硬件能力差异与适用场景
    • SIMD-Regbase：寄存器组、核心优势、代码形态变化
    • 数据格式扩展：完整数据类型表、C++ 类型名映射、MXFP Tiling 约束
    • NDDMA / CCU：高维 DMA 用法、CCU 三种通信范式、KFC 调度模型
    • 架构兼容性检查清单 / 参考信息来源

范围边界：本技能聚焦架构判断与硬件能力识别。算子目录结构、CMake 配置、文件命名约定等工程模板内容不在本技能范围内。