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#!/usr/bin/env python
# coding=utf-8
import os
import re
import subprocess
import logging
log = logging.getLogger(__name__)
def run_cmd(cmd, shell=True):
try:
ret = subprocess.check_output(cmd, shell=shell)
except subprocess.CalledProcessError as e:
raise e
return ret
class Resource(object):
def __init__(self):
super(Resource, self).__init__()
self.sysfs = "/sys/devices/system/node"
self.mapping = {}
for node in self._init_numa():
self.mapping[node] = {}
process_mapping = self._get_process_mapping(node)
for process_index in xrange(0, len(bin(process_mapping)) - 2):
if process_mapping & 1 << process_index != 0:
core = self._get_core_id(node, process_index)
if not self.mapping[node].has_key(core):
self.mapping[node][core] = []
self.mapping[node][core].append(process_index)
def _get_process_mapping(self, numa_node):
ret = run_cmd("cat " + self.sysfs + '/' + numa_node + '/cpumap').replace(',', '').lstrip('0')
return int(ret, 16)
def _get_core_id(self, numa_node, process_index):
cmd = "cat " + self.sysfs + '/' + numa_node + '/cpu' + str(process_index) + '/topology/core_id'
return run_cmd(cmd).strip('\n')
def _init_numa(self):
"""the node name is node0, node1......"""
try:
node_list = os.listdir(self.sysfs)
except Exception as e:
raise e
ret = []
partten = re.compile("^node[0-9]{,}$")
for node in node_list:
if partten.match(node) is None:
continue
ret.append(node)
return ret
class Equalizer(Resource):
def __init__(self):
super(Equalizer, self).__init__()
def topology(self):
print self.mapping
e = Equalizer()
e.topology()
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