3 files changed, 171 insertions, 3 deletions
diff --git a/tools/load_gen/stress_ng/stress_ng.py b/tools/load_gen/stress_ng/stress_ng.py
index c2592dd1..41bfe990 100644
--- a/tools/load_gen/stress_ng/stress_ng.py
+++ b/tools/load_gen/stress_ng/stress_ng.py
@@ -30,6 +30,3 @@ class StressNg(Stress):
         'name': 'stress-ng'
     }
     _logger = logging.getLogger(__name__)
-
-    def __init__(self, stress_config):
-        super(StressNg, self).__init__(stress_config)
diff --git a/tools/load_gen/stressorvm/__init__.py b/tools/load_gen/stressorvm/__init__.py
new file mode 100644
index 00000000..6a22d81c
--- /dev/null
+++ b/tools/load_gen/stressorvm/__init__.py
@@ -0,0 +1,16 @@
+# Copyright 2017-2018 Spirent Communications
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""Package with wrapper for Stressor-VMs
+"""
diff --git a/tools/load_gen/stressorvm/stressor_vm.py b/tools/load_gen/stressorvm/stressor_vm.py
new file mode 100644
index 00000000..82329d2b
--- /dev/null
+++ b/tools/load_gen/stressorvm/stressor_vm.py
@@ -0,0 +1,155 @@
+# Copyright 2017-2018 Spirent Communications.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+"""
+Wrapper file to create and manage Stressor-VM as loadgen
+"""
+
+import locale
+import logging
+import os
+import re
+import subprocess
+import time
+from tools import tasks
+from tools.load_gen.load_gen import ILoadGenerator
+from conf import settings as S
+
+
+class QemuVM(tasks.Process):
+    """
+    Class for controling an instance of QEMU
+    """
+    def __init__(self, index):
+        self._running = False
+        self._logger = logging.getLogger(__name__)
+        self._number = index
+        pnumber = int(S.getValue('NN_BASE_VNC_PORT')) + self._number
+        cpumask = ",".join(S.getValue('NN_CORE_BINDING')[self._number])
+        self._monitor = '%s/vm%dmonitor' % ('/tmp', pnumber)
+        self._logfile = (os.path.join(S.getValue('LOG_DIR'),
+                                      S.getValue('NN_LOG_FILE')) +
+                         str(self._number))
+        self._log_prefix = 'vnf_%d_cmd : ' % pnumber
+        name = 'NN%d' % index
+        vnc = ':%d' % pnumber
+        self._shared_dir = '%s/qemu%d_share' % ('/tmp', pnumber)
+        if not os.path.exists(self._shared_dir):
+            try:
+                os.makedirs(self._shared_dir)
+            except OSError as exp:
+                raise OSError("Failed to create shared directory %s: %s" %
+                              self._shared_dir, exp)
+
+        self.nics_nr = S.getValue('NN_NICS_NR')[self._number]
+        self.image = S.getValue('NN_IMAGE')[self._number]
+        self._cmd = ['sudo', '-E', 'taskset', '-c', cpumask,
+                     S.getValue('TOOLS')['qemu-system'],
+                     '-m', S.getValue('NN_MEMORY')[self._number],
+                     '-smp', S.getValue('NN_SMP')[self._number],
+                     '-cpu', 'host,migratable=off',
+                     '-drive', 'if={},file='.format(
+                         S.getValue('NN_BOOT_DRIVE_TYPE')[self._number]) +
+                     self.image, '-boot',
+                     'c', '--enable-kvm',
+                     '-monitor', 'unix:%s,server,nowait' % self._monitor,
+                     '-nographic', '-vnc', str(vnc), '-name', name,
+                     '-snapshot', '-net none', '-no-reboot',
+                     '-drive',
+                     'if=%s,format=raw,file=fat:rw:%s,snapshot=off' %
+                     (S.getValue('NN_SHARED_DRIVE_TYPE')[self._number],
+                      self._shared_dir)
+                    ]
+
+    def start(self):
+        """
+        Start QEMU instance
+        """
+        super(QemuVM, self).start()
+        self._running = True
+
+    def stop(self, sig, slp):
+        """
+        Stops VNF instance.
+        """
+        if self._running:
+            self._logger.info('Killing VNF...')
+            # force termination of VNF and wait to terminate; It will avoid
+            # sporadic reboot of host.
+            super(QemuVM, self).kill(signal=sig, sleep=slp)
+        # remove shared dir if it exists to avoid issues with file consistency
+        if os.path.exists(self._shared_dir):
+            tasks.run_task(['rm', '-f', '-r', self._shared_dir], self._logger,
+                           'Removing content of shared directory...', True)
+        self._running = False
+
+    def affinitize_nn(self):
+        """
+        Affinitize the SMP cores of a NN instance.
+        This function is same as the one in vnfs/qemu/qemu.py
+
+        :returns: None
+        """
+        thread_id = (r'.* CPU #%d: .* thread_id=(\d+)')
+        cur_locale = locale.getdefaultlocale()[1]
+        proc = subprocess.Popen(
+            ('echo', 'info cpus'), stdout=subprocess.PIPE)
+        while not os.path.exists(self._monitor):
+            time.sleep(1)
+        output = subprocess.check_output(
+            ('sudo', 'socat', '-', 'UNIX-CONNECT:%s' % self._monitor),
+            stdin=proc.stdout)
+        proc.wait()
+
+        # calculate the number of CPUs specified by NN_SMP
+        cpu_nr = int(S.getValue('NN_SMP')[self._number])
+        # pin each NN's core to host core based on configured BINDING
+        for cpu in range(0, cpu_nr):
+            match = None
+            guest_thread_binding = S.getValue('NN_CORE_BINDING')[self._number]
+            for line in output.decode(cur_locale).split('\n'):
+                match = re.search(thread_id % cpu, line)
+                if match:
+                    self._affinitize_pid(guest_thread_binding[cpu],
+                                         match.group(1))
+                    break
+            if not match:
+                self._logger.error('Failed to affinitize guest core #%d. Could'
+                                   ' not parse tid.', cpu)
+
+
+# pylint: disable=super-init-not-called,unused-argument
+class StressorVM(ILoadGenerator):
+    """
+    Wrapper Class for Load-Generation through stressor-vm
+    """
+    def __init__(self, _config):
+        self.qvm_list = []
+        for vmindex in range(int(S.getValue('NN_COUNT'))):
+            qvm = QemuVM(vmindex)
+            self.qvm_list.append(qvm)
+
+    def start(self):
+        """Start stressor VMs
+        """
+        for nvm in self.qvm_list:
+            nvm.start()
+            nvm.affinitize_nn()
+
+    def kill(self, signal='-9', sleep=2):
+        """
+        Stop Stressor VMs
+        """
+        for nvm in self.qvm_list:
+            nvm.stop(signal, sleep)