add ping benchmark type

This simple benchmark can be used to measure network latency.

Change-Id: I41f5b9f32544b2e668d39220fcfb87ed493f4baa
JIRA: -
Signed-off-by: Hans Feldt <hans.feldt@ericsson.com>

diff --git a/yardstick/benchmark/scenarios/networking/__init__.py b/yardstick/benchmark/scenarios/networking/__init__.py
new file mode 100644 (file)
index 0000000..e69de29

diff --git a/yardstick/benchmark/scenarios/networking/ping.py b/yardstick/benchmark/scenarios/networking/ping.py
new file mode 100644 (file)
index 0000000..cd4054f
--- /dev/null
+++ b/yardstick/benchmark/scenarios/networking/ping.py
@@ -0,0 +1,78 @@
+##############################################################################
+# Copyright (c) 2015 Ericsson AB 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
+##############################################################################
+
+# ping scenario
+
+import pkg_resources
+import logging
+
+import yardstick.ssh as ssh
+from yardstick.benchmark.scenarios import base
+
+LOG = logging.getLogger(__name__)
+
+
+class Ping(base.Scenario):
+    """Executes a ping benchmark between two hosts"""
+    __scenario_type__ = "Ping"
+
+    TARGET_SCRIPT = 'ping_benchmark.bash'
+
+    def __init__(self, context):
+        self.context = context
+        self.target_script = pkg_resources.resource_filename(
+            'yardstick.benchmark.scenarios.networking', Ping.TARGET_SCRIPT)
+        user = self.context.get('user', 'ubuntu')
+        host = self.context.get('host', None)
+        key_filename = self.context.get('key_filename', '~/.ssh/id_rsa')
+
+        LOG.debug("user:%s, host:%s", user, host)
+
+        self.connection = ssh.SSH(user, host, key_filename=key_filename)
+        self.connection.wait()
+
+    def run(self, args):
+        """execute the benchmark"""
+
+        self.options = "-s %s" % args['options'].get("packetsize", '56')
+        self.ipaddr = args.get("ipaddr", '127.0.0.1')
+
+        LOG.debug("ping %s %s", self.options, self.ipaddr)
+
+        exit_status, stdout, stderr = self.connection.execute(
+            "/bin/sh -s {0} {1}".format(self.ipaddr, self.options),
+            stdin=open(self.target_script, "r"))
+
+        if exit_status != 0:
+            raise RuntimeError(stderr)
+
+        rtt = float(stdout)
+
+        if "sla" in args:
+            sla_max_rtt = int(args["sla"]["max_rtt"])
+            assert rtt <= sla_max_rtt, "rtt %f > sla_max_rtt" % rtt
+
+        return rtt
+
+
+def _test():
+    '''internal test function'''
+    key_filename = pkg_resources.resource_filename('yardstick.resources',
+                                                   'files/yardstick_key')
+    ctx = {'host': '172.16.0.137',
+           'user': 'cirros',
+           'key_filename': key_filename}
+    p = Ping(ctx)
+    args = {'options': '-c 2 -s 200',
+            'ipaddr': '172.16.0.138'}
+    result = p.run(args)
+    print result
+
+if __name__ == '__main__':
+    _test()

diff --git a/yardstick/benchmark/scenarios/networking/ping_benchmark.bash b/yardstick/benchmark/scenarios/networking/ping_benchmark.bash
new file mode 100644 (file)
index 0000000..6916b77
--- /dev/null
+++ b/yardstick/benchmark/scenarios/networking/ping_benchmark.bash
@@ -0,0 +1,22 @@
+#!/bin/bash
+
+##############################################################################
+# Copyright (c) 2015 Ericsson AB 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
+##############################################################################
+
+# Run a single ping command towards a destination and outputs the round trip
+# time in milliseconds on stdout. The count (-c) option is deliberately not
+# supported since it is supposed to be handled by the runner.
+
+set -e
+
+destination=$1
+shift
+options="$@"
+
+ping -c 1 $options $destination | grep ttl | awk -F [=\ ] '{printf $10}'