eal: rework cpu information discovery

[dpdk.git] / tools / cpu_layout.py

diff --git a/tools/cpu_layout.py b/tools/cpu_layout.py
new file mode 100755 (executable)
index 0000000..ea19214
--- /dev/null
+++ b/tools/cpu_layout.py
@@ -0,0 +1,90 @@
+#! /usr/bin/python
+#
+#   BSD LICENSE
+# 
+#   Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
+#   All rights reserved.
+# 
+#   Redistribution and use in source and binary forms, with or without 
+#   modification, are permitted provided that the following conditions 
+#   are met:
+# 
+#     * Redistributions of source code must retain the above copyright 
+#       notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above copyright 
+#       notice, this list of conditions and the following disclaimer in 
+#       the documentation and/or other materials provided with the 
+#       distribution.
+#     * Neither the name of Intel Corporation nor the names of its 
+#       contributors may be used to endorse or promote products derived 
+#       from this software without specific prior written permission.
+# 
+#   THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 
+#   "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 
+#   LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 
+#   A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 
+#   OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 
+#   SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
+#   LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
+#   DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
+#   THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+#   (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+#   OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+# 
+#
+
+import sys
+
+sockets = []
+cores = []
+core_map = {}
+
+fd=open("/proc/cpuinfo")
+lines = fd.readlines()
+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"])
+       if key not in core_map:
+               core_map[key] = []
+       core_map[key].append(core["processor"])
+
+print "============================================================"
+print "Core and Socket Information (as reported by '/proc/cpuinfo')"
+print "============================================================\n"
+print "cores = ",cores
+print "sockets = ", sockets
+print ""
+
+for s in sockets:
+       print "\tSocket %s" % s,
+print ""
+for s in sockets:
+       print "\t---------",
+print ""
+
+for c in cores:
+       print "Core %s" % c,
+       for s in sockets:
+               print "\t", core_map[(s,c)],
+       print "\n"