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

[Thomas Monjalon]

Andriy, please would you like to review this patch?

28/04/2017 12:34, 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)
>