本文主要介绍运行NCCL代码时输出的xml文件该如何转成更加容易观看的图格式

如下是举例，服务器上的PCIE相关的topo xml 文件

<system version="1"><cpu numaid="1" affinity="ffffff00,0000ffff,ff000000" arch="x86_64" vendor="GenuineIntel" familyid="6" modelid="106"><pci busid="0000:98:00.0" class="0x060400" vendor="0x1bd4" device="0x3004" subsystem_vendor="0x0000" subsystem_device="0x0000" link_speed="16.0 GT/s PCIe" link_width="16"><pci busid="0000:a6:00.0" class="0x030200" vendor="0x10de" device="0x2235" subsystem_vendor="0x10de" subsystem_device="0x145a" link_speed="16.0 GT/s PCIe" link_width="16"><gpu dev="0" sm="86" rank="0" gdr="1"/></pci><pci busid="0000:a5:00.0" class="0x020000" vendor="0x15b3" device="0x1021" subsystem_vendor="0x15b3" subsystem_device="0x0023" link_speed="16.0 GT/s PCIe" link_width="16"><nic><net name="mlx5_0" dev="0" speed="200000" port="1" latency="0.000000" guid="0xbe8cb30003ae6d94" maxconn="131072" gdr="1"/></nic></pci></pci></cpu>
</system>

将该文件转换成图格式

import os
import sys
import logging
import argparse
import xml.etree.ElementTree as ET
from graphviz import Graphdef build_topology(graph, parent_element, parent_node=None):dev = parent_element.tagres = Noneif dev == 'cpu':res = parent_element.get('numaid').replace(':', '_')elif dev == 'pci':res = parent_element.get('busid').replace(':', '_')elif dev == 'gpu':res = parent_element.get('dev').replace(':', '_')elif dev == 'nvlink':res = parent_element.get('target').replace(':', '_')elif dev == 'net':res = parent_element.get('name').replace(':', '_')node = devif res is not None:node = dev + '_' + resall_attributes = {attr: parent_element.get(attr) for attr in parent_element.attrib}str_attr = node + '\n\n' + str(all_attributes).replace(',', '\n')graph.node(node, shape='box', label=str_attr)if parent_node is not None:graph.edge(parent_node, node)for child_element in parent_element:build_topology(graph, child_element, node)if __name__ == "__main__":parser = argparse.ArgumentParser(description='Parse xml file to pdf or png.')parser.add_argument('-i', '--input', required=True, help='Input file path')parser.add_argument('-o', '--output', default='xml', help='Output file name')args = parser.parse_args()input_file_path = args.inputoutput_file_name = args.output# 解析XML数据tree = ET.parse(input_file_path)# 获取 XML 文档对象的根结点 Elementroot_element = tree.getroot()graph = Graph()build_topology(graph, root_element)# 绘制拓扑图graph.render(output_file_name, format='png')# graph.view()print('Finished')

得出结果为