sriov: Support of SRIOV and Qemu PCI passthrough

Generic support of SRIOV has been added. Virtual interfaces can be
used in multiplei scenarios instead of physical NICs. Virtual
functions can be directly accessed from VM by PCI passthrough method.
Another option is to use VFs with vSwtich to evaluate impact
on performance.
Additonal modifications:
* Automatic detection of NIC details has been added to simplify
configuration.
* Obsoleted configuration options have been removed.
* Logging usage within vsperf script was fixed.
* Vsperf main was refactored and final cleanup function added.
* Configurable forwarding mode of TestPMD executed inside VM.

JIRA: VSPERF-198
Change-Id: I4a0d5d262b245d433b12419de79399fb5825a623
Signed-off-by: Martin Klozik <martinx.klozik@intel.com>
Reviewed-by: Maryam Tahhan <maryam.tahhan@intel.com>
Reviewed-by: Al Morton <acmorton@att.com>
Reviewed-by: Christian Trautman <ctrautma@redhat.com>
Reviewed-by: Brian Castelli <brian.castelli@spirent.com>

3 files changed, 11 insertions, 7 deletions

diff --git a/core/component_factory.py b/core/component_factory.py
index 9c58fc5c..a91872e2 100644
--- a/core/component_factory.py
+++ b/core/component_factory.py
@@ -118,13 +118,14 @@ def create_loadgen(loadgen_type, loadgen_cfg):
     elif loadgen_type.find("stress") >= 0:
         return Stress(loadgen_cfg)
 
-def create_pktfwd(pktfwd_class):
+def create_pktfwd(deployment, pktfwd_class):
     """Return a new packet forwarder controller
 
     The returned controller is configured with the given
     packet forwarder class.
 
     :param pktfwd_class: Reference to packet forwarder class to be used.
+    :param deployment: The deployment scenario name
     :return: packet forwarder controller
     """
-    return PktFwdController(pktfwd_class)
+    return PktFwdController(deployment, pktfwd_class)
diff --git a/core/loader/loader_servant.py b/core/loader/loader_servant.py
index dc6353ff..226b0931 100644
--- a/core/loader/loader_servant.py
+++ b/core/loader/loader_servant.py
@@ -90,8 +90,8 @@ class LoaderServant(object):
             desc = (mod.__doc__ or 'No description').strip().split('\n')[0]
             results.append((name, desc))
 
-        output = [
-            'Classes derived from: ' + self._interface.__name__ + '\n======\n']
+        header = 'Classes derived from: ' + self._interface.__name__
+        output = [header + '\n' + '=' * len(header) + '\n']
 
         for (name, desc) in results:
             output.append('* %-18s%s' % ('%s:' % name, desc))
diff --git a/core/pktfwd_controller.py b/core/pktfwd_controller.py
index 40565504..b1e37f2e 100644
--- a/core/pktfwd_controller.py
+++ b/core/pktfwd_controller.py
@@ -24,11 +24,12 @@ class PktFwdController(object):
         _pktfwd_class: The packet forwarder class to be used.
         _pktfwd: The packet forwarder object controlled by this controller
     """
-    def __init__(self, pktfwd_class):
+    def __init__(self, deployment, pktfwd_class):
         """Initializes up the prerequisites for the P2P deployment scenario.
 
         :vswitch_class: the vSwitch class to be used.
         """
+        self._deployment = deployment
         self._logger = logging.getLogger(__name__)
         self._pktfwd_class = pktfwd_class
         self._pktfwd = pktfwd_class()
@@ -52,10 +53,12 @@ class PktFwdController(object):
         self._pktfwd.stop()
 
     def __enter__(self):
-        self.setup()
+        if self._deployment.find("p2p") == 0:
+            self.setup()
 
     def __exit__(self, type_, value, traceback):
-        self.stop()
+        if self._deployment.find("p2p") == 0:
+            self.stop()
 
     def get_pktfwd(self):
         """Get the controlled packet forwarder