[dpdk-dev] [PATCH] usertools: fix cpu_layout script for multithreads of more than 2

[Gowrishankar]

From: Gowrishankar Muthukrishnan <gowrishankar.m at linux.vnet.ibm.com>

Current usertools/cpu_layout.py is broken to handle multithreads of count more
than 2 as in IBM powerpc P8 servers. Below patch addressed this issue. Also,
added minor exception catch on failing to open unavailable sys file in case of
multithread=off configuration in server.

Patch has been verified not to break existing topology configurations
and also not changing anything in current output.

Signed-off-by: Gowrishankar Muthukrishnan <gowrishankar.m at linux.vnet.ibm.com>
---
 usertools/cpu_layout.py | 12 ++++++++++--
 1 file changed, 10 insertions(+), 2 deletions(-)

diff --git a/usertools/cpu_layout.py b/usertools/cpu_layout.py
index 5735891..99152a2 100755
--- a/usertools/cpu_layout.py
+++ b/usertools/cpu_layout.py
@@ -46,6 +46,8 @@
 for cpu in xrange(max_cpus + 1):
     try:
         fd = open("{}/cpu{}/topology/core_id".format(base_path, cpu))
+    except IOError:
+        continue
     except:
         break
     core = int(fd.read())
@@ -70,7 +72,10 @@
 print("")
 
 max_processor_len = len(str(len(cores) * len(sockets) * 2 - 1))
-max_core_map_len = max_processor_len * 2 + len('[, ]') + len('Socket ')
+max_thread_count = len(core_map.values()[0])
+max_core_map_len = (max_processor_len * max_thread_count)  \
+                      + len(", ") * (max_thread_count - 1) \
+                      + len('[]') + len('Socket ')
 max_core_id_len = len(str(max(cores)))
 
 output = " ".ljust(max_core_id_len + len('Core '))
@@ -87,5 +92,8 @@
 for c in cores:
     output = "Core %s" % str(c).ljust(max_core_id_len)
     for s in sockets:
-        output += " " + str(core_map[(s, c)]).ljust(max_core_map_len)
+        if core_map.has_key((s,c)):
+            output += " " + str(core_map[(s, c)]).ljust(max_core_map_len)
+        else:
+            output += " " * (max_core_map_len + 1)
     print(output)
-- 
1.9.1