CSIT-312 VPP vhost-user - VPP vhost-user driver, virtio in VM

- Add libraries and keywords to control Qemu VM and VMapp

Change-Id: Iaaedfe240afe394f507ccaf0cf7a77c8b863acd3
Signed-off-by: pmikus <pmikus@cisco.com>

1 files changed, 109 insertions, 0 deletions

diff --git a/resources/libraries/python/DpdkUtil.py b/resources/libraries/python/DpdkUtil.py
new file mode 100644
index 0000000000..5eea0d6c26
--- /dev/null
+++ b/resources/libraries/python/DpdkUtil.py
@@ -0,0 +1,109 @@
+# Copyright (c) 2016 Cisco and/or its affiliates.
+# 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.
+
+"""Dpdk Utilities Library."""
+
+from resources.libraries.python.ssh import SSH, exec_cmd_no_error
+
+
+class DpdkUtil(object):
+    """Utilities for DPDK."""
+
+    @staticmethod
+    def dpdk_testpmd_start(node, **args):
+        """Start DPDK testpmd app on VM node.
+
+        :param node: VM Node to start testpmd on.
+        :param args: List of testpmd parameters.
+        :type node: dict
+        :type args: list
+        :return: nothing
+        """
+        # Set the hexadecimal bitmask of the cores to run on.
+        eal_coremask = '-c {} '.format(args['eal_coremask'])\
+            if args.get('eal_coremask', '') else ''
+        # Set the number of memory channels to use.
+        eal_mem_channels = '-n {} '.format(args['eal_mem_channels'])\
+            if args.get('eal_mem_channels', '') else ''
+        # Set the memory to allocate on specific sockets (comma separated).
+        eal_socket_mem = '--socket-mem {} '.format(args['eal_socket_mem'])\
+            if args.get('eal_socket_mem', '') else ''
+        # Load an external driver. Multiple -d options are allowed.
+        eal_driver = '-d /usr/lib/librte_pmd_virtio.so '
+        # Set the forwarding mode: io, mac, mac_retry, mac_swap, flowgen,
+        # rxonly, txonly, csum, icmpecho, ieee1588
+        pmd_fwd_mode = '--forward-mode={} '.format(args['pmd_fwd_mode'])\
+            if args.get('pmd_fwd_mode', '') else ''
+        # Set the number of packets per burst to N.
+        pmd_burst = '--burst=64 '
+        # Set the number of descriptors in the TX rings to N.
+        pmd_txd = '--txd=2048 '
+        # Set the number of descriptors in the RX rings to N.
+        pmd_rxd = '--rxd=2048 '
+        # Set the hexadecimal bitmask of TX queue flags.
+        pmd_txqflags = '--txqflags=0xf00 '
+        # Set the number of mbufs to be allocated in the mbuf pools.
+        pmd_total_num_mbufs = '--total-num-mbufs=65536 '
+        # Set the hexadecimal bitmask of the ports for forwarding.
+        pmd_portmask = '--portmask=0x3 '
+        # Disable hardware VLAN.
+        pmd_disable_hw_vlan = '--disable-hw-vlan '\
+            if args.get('pmd_disable_hw_vlan', '') else ''
+        # Disable RSS (Receive Side Scaling).
+        pmd_disable_rss = '--disable-rss '\
+            if args.get('pmd_disable_rss', '') else ''
+        # Set the hexadecimal bitmask of the cores running forwarding. Master
+        # lcore=0 is reserved, so highest bit is set to 0.
+        pmd_coremask = '--coremask={} '.format(\
+            hex(int(args['eal_coremask'], 0) & 0xFFFE))\
+            if args.get('eal_coremask', '') else ''
+        # Set the number of forwarding cores based on coremask.
+        pmd_nb_cores = '--nb-cores={} '.format(\
+            bin(int(args['eal_coremask'], 0) & 0xFFFE).count('1'))\
+            if args.get('eal_coremask', '') else ''
+        eal_options = '-v '\
+            + eal_coremask\
+            + eal_mem_channels\
+            + eal_socket_mem\
+            + eal_driver
+        pmd_options = '-- '\
+            + pmd_fwd_mode\
+            + pmd_burst\
+            + pmd_txd\
+            + pmd_rxd\
+            + pmd_txqflags\
+            + pmd_total_num_mbufs\
+            + pmd_portmask\
+            + pmd_disable_hw_vlan\
+            + pmd_disable_rss\
+            + pmd_coremask\
+            + pmd_nb_cores
+        ssh = SSH()
+        ssh.connect(node)
+        cmd = "/start-testpmd.sh {0} {1}".format(eal_options, pmd_options)
+        exec_cmd_no_error(node, cmd, sudo=True)
+        ssh.disconnect(node)
+
+    @staticmethod
+    def dpdk_testpmd_stop(node):
+        """Stop DPDK testpmd app on node.
+
+        :param node: Node to stop testpmd on.
+        :type node: dict
+        :return: nothing
+        """
+        ssh = SSH()
+        ssh.connect(node)
+        cmd = "/stop-testpmd.sh"
+        exec_cmd_no_error(node, cmd, sudo=True)
+        ssh.disconnect(node)