Add Pktgen traffic generator for vCMTS

[yardstick.git] / yardstick / common / utils.py

diff --git a/yardstick/common/utils.py b/yardstick/common/utils.py
index 31885c0..9eba896 100644 (file)
--- a/yardstick/common/utils.py
+++ b/yardstick/common/utils.py
@@ -30,6 +30,7 @@ import subprocess
 import sys
 import time
 import threading
+import math
 
 import six
 from flask import jsonify
@@ -292,6 +293,17 @@ def make_ipv4_address(ip_addr):
     return ipaddress.IPv4Address(six.text_type(ip_addr))
 
 
+def get_ip_range_count(iprange):
+    start_range, end_range = iprange.split("-")
+    start = int(make_ipv4_address(start_range))
+    end = int(make_ipv4_address(end_range))
+    return end - start
+
+
+def get_ip_range_start(iprange):
+    return str(make_ipv4_address(iprange.split("-")[0]))
+
+
 def safe_ip_address(ip_addr):
     """ get ip address version v6 or v4 """
     try:
@@ -499,6 +511,23 @@ def read_meminfo(ssh_client):
     return output
 
 
+def setup_hugepages(ssh_client, size_kb):
+    """Setup needed number of hugepages for the size specified"""
+
+    NR_HUGEPAGES_PATH = '/proc/sys/vm/nr_hugepages'
+    meminfo = read_meminfo(ssh_client)
+    hp_size_kb = int(meminfo['Hugepagesize'])
+    hp_number = int(math.ceil(size_kb / float(hp_size_kb)))
+    ssh_client.execute(
+        'echo %s | sudo tee %s' % (hp_number, NR_HUGEPAGES_PATH))
+    hp = six.BytesIO()
+    ssh_client.get_file_obj(NR_HUGEPAGES_PATH, hp)
+    hp_number_set = int(hp.getvalue().decode('utf-8').splitlines()[0])
+    logger.info('Hugepages size (kB): %s, number claimed: %s, number set: %s',
+                hp_size_kb, hp_number, hp_number_set)
+    return hp_size_kb, hp_number, hp_number_set
+
+
 def find_relative_file(path, task_path):
     """
     Find file in one of places: in abs of path or relative to a directory path,