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##############################################################################
# Copyright (c) 2016 Huawei Technologies Co.,Ltd and others.
#
# All rights reserved. This program and the accompanying materials
# are made available under the terms of the Apache License, Version 2.0
# which accompanies this distribution, and is available at
# http://www.apache.org/licenses/LICENSE-2.0
##############################################################################
"""Memory load and statistics."""
from __future__ import absolute_import
import logging
import yardstick.ssh as ssh
from yardstick.benchmark.scenarios import base
from six.moves import zip
LOG = logging.getLogger(__name__)
class MEMLoad(base.Scenario):
"""Collect memory statistics and system load.
This scenario reads memory usage statistics on a Linux host.
memory usage statistics are read using the utility 'free'.
Parameters
interval - Time interval to measure memory usage.
Continuously display the result delay interval seconds apart.
type: [int]
unit: seconds
default: 1
count - specifies a # of measurments for each test
type: [int]
unit: N/A
default: 1
"""
__scenario_type__ = "MEMORYload"
def __init__(self, scenario_cfg, context_cfg):
"""Scenario construction."""
self.scenario_cfg = scenario_cfg
self.context_cfg = context_cfg
self.setup_done = False
def setup(self):
"""Scenario setup."""
host = self.context_cfg['host']
user = host.get('user', 'ubuntu')
ssh_port = host.get("ssh_port", ssh.DEFAULT_PORT)
ip = host.get('ip', None)
key_filename = host.get('key_filename', '~/.ssh/id_rsa')
LOG.info("user:%s, host:%s", user, ip)
self.client = ssh.SSH(user, ip, key_filename=key_filename,
port=ssh_port)
self.client.wait(timeout=600)
self.setup_done = True
def _execute_command(self, cmd):
"""Execute a command on server."""
LOG.info("Executing: %s", cmd)
status, stdout, stderr = self.client.execute(cmd)
if status:
raise RuntimeError("Failed executing command: ",
cmd, stderr)
return stdout
def _filtrate_result(self, result):
fields = []
free = {}
ite = 0
average = {'total': 0, 'used': 0, 'free': 0, 'buff/cache': 0,
'shared': 0}
maximum = {'total': 0, 'used': 0, 'free': 0, 'buff/cache': 0,
'shared': 0}
for row in result.split('\n'):
line = row.split()
if line and line[0] == 'total':
# header fields
fields = line[:]
elif line and line[0] == 'Mem:':
memory = 'memory' + str(ite)
ite += 1
values = line[1:]
if values and len(values) == len(fields):
free[memory] = dict(list(zip(fields, values)))
for entry in free:
for item in average:
average[item] += int(free[entry][item])
for item in maximum:
if int(free[entry][item]) > maximum[item]:
maximum[item] = int(free[entry][item])
for item in average:
average[item] = average[item] / len(free)
return {'free': free, 'average': average, 'max': maximum}
def _get_mem_usage(self):
"""Get memory usage using free."""
options = self.scenario_cfg['options']
interval = options.get("interval", 1)
count = options.get("count", 1)
cmd = "free -c '%s' -s '%s'" % (count, interval)
result = self._execute_command(cmd)
filtrated_result = self._filtrate_result(result)
return filtrated_result
def run(self, result):
"""Read processor statistics."""
if not self.setup_done:
self.setup()
result.update(self._get_mem_usage())
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