d/numam-dpdk
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

usertools: use sysfs for CPU layout

Browse Source 
Some platforms do not have core/socket info in /proc/cpuinfo.
Use /sys/devices/system/cpu instead.

Signed-off-by: Andriy Berestovskyy <andriy.berestovskyy@caviumnetworks.com>
This commit is contained in:
Andriy Berestovskyy 2017-03-31 14:21:00 +02:00 committed by Thomas Monjalon
parent 45fc6f429b
commit deb87e6777
1 changed files with 23 additions and 30 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

53
usertools/cpu_layout.py
View File

@ -4,6 +4,7 @@
# BSD LICENSE
#
# Copyright(c) 2010-2014 Intel Corporation. All rights reserved.
# Copyright(c) 2017 Cavium Networks Ltd. All rights reserved.
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
@ -38,40 +39,32 @@
sockets = []
cores = []
core_map = {}
fd = open("/proc/cpuinfo")
lines = fd.readlines()
base_path = "/sys/devices/system/cpu"
fd = open("{}/kernel_max".format(base_path))
max_cpus = int(fd.read())
fd.close()
core_details = []
core_lines = {}
for line in lines:
if len(line.strip()) != 0:
name, value = line.split(":", 1)
core_lines[name.strip()] = value.strip()
else:
core_details.append(core_lines)
core_lines = {}
for core in core_details:
for field in ["processor", "core id", "physical id"]:
if field not in core:
print("Error getting '%s' value from /proc/cpuinfo" % field)
sys.exit(1)
core[field] = int(core[field])
if core["core id"] not in cores:
cores.append(core["core id"])
if core["physical id"] not in sockets:
sockets.append(core["physical id"])
key = (core["physical id"], core["core id"])
for cpu in xrange(max_cpus + 1):
try:
fd = open("{}/cpu{}/topology/core_id".format(base_path, cpu))
except:
break
core = int(fd.read())
fd.close()
fd = open("{}/cpu{}/topology/physical_package_id".format(base_path, cpu))
socket = int(fd.read())
fd.close()
if core not in cores:
cores.append(core)
if socket not in sockets:
sockets.append(socket)
key = (socket, core)
if key not in core_map:
core_map[key] = []
core_map[key].append(core["processor"])
core_map[key].append(cpu)
print("============================================================")
print("Core and Socket Information (as reported by '/proc/cpuinfo')")
print("============================================================\n")
print(format("=" * (47 + len(base_path))))
print("Core and Socket Information (as reported by '{}')".format(base_path))
print("{}\n".format("=" * (47 + len(base_path))))
print("cores = ", cores)
print("sockets = ", sockets)
print("")