Improve SampleVNF hugepages setup

The goal of this function is to:
- Read the default hugepage size.
- Set 16GB of hugepages.
- Check if the status of the last action.

According to [1], the default hugepage size could be read in
"/proc/meminfo", always in kB. Then "/proc/sys/vm/nr_hugepages"
could be used to set the number of default hugepages.

[1] https://www.kernel.org/doc/Documentation/vm/hugetlbpage.txt

JIRA: YARDSTICK-997

Change-Id: I762d1b16294ba1c1c2feee56610819ac358c7410
Signed-off-by: Rodolfo Alonso Hernandez <rodolfo.alonso.hernandez@intel.com>

1 files changed, 15 insertions, 0 deletions

diff --git a/yardstick/common/utils.py b/yardstick/common/utils.py
index 8604e900f..495290122 100644
--- a/yardstick/common/utils.py
+++ b/yardstick/common/utils.py
@@ -22,6 +22,7 @@ import ipaddress
 import logging
 import os
 import random
+import re
 import socket
 import subprocess
 import sys
@@ -395,3 +396,17 @@ class Timer(object):
 
     def __getattr__(self, item):
         return getattr(self.delta, item)
+
+
+def read_meminfo(ssh_client):
+    """Read "/proc/meminfo" file and parse all keys and values"""
+
+    cpuinfo = six.BytesIO()
+    ssh_client.get_file_obj('/proc/meminfo', cpuinfo)
+    lines = cpuinfo.getvalue().decode('utf-8')
+    matches = re.findall(r"([\w\(\)]+):\s+(\d+)( kB)*", lines)
+    output = {}
+    for match in matches:
+        output[match[0]] = match[1]
+
+    return output