[PATCH-next v2 19/20] Recipes.ENRT.OvS_DPDK_PvP: stability improvements

From: Ondrej Lichtner <olichtne(a)redhat.com&gt;

Adding the same changes that were made on the master branch to the
original ovs_dpdk_pvp.xml recipe to significantly improve the stability
of measured results. This includes:
* fixing use of hugepages by the guest
    * setting hugepages as memory backing
    * increasing the number of hugepages on host2 to enable full memory
      backing of the guest RAM
* configuring pmd coremask of testpmd in the guest - this tells which
  cpus should the testpmd process use for pmd threads that handle NICs

Signed-off-by: Ondrej Lichtner <olichtne(a)redhat.com&gt;
---
 lnst/Recipes/ENRT/OvS_DPDK_PvP.py | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/lnst/Recipes/ENRT/OvS_DPDK_PvP.py b/lnst/Recipes/ENRT/OvS_DPDK_PvP.py
index 1f963f6..860f060 100644
--- a/lnst/Recipes/ENRT/OvS_DPDK_PvP.py
+++ b/lnst/Recipes/ENRT/OvS_DPDK_PvP.py
@@ -60,12 +60,13 @@ class OvSDPDKPvPRecipe(PingTestAndEvaluate, PerfTestAndEvaluate):
     guest_cpus = StrParam(mandatory=True)
     guest_emulatorpin_cpu = StrParam(mandatory=True)
     guest_dpdk_cores = StrParam(mandatory=True)
+    guest_testpmd_cores = StrParam(mandatory=True)
     guest_mem_size = IntParam(default=16777216)
 
     host1_dpdk_cores = StrParam(mandatory=True)
     host2_pmd_cores = StrParam(mandatory=True)
     host2_l_cores = StrParam(mandatory=True)
-    nr_hugepages = IntParam(default=2048)
+    nr_hugepages = IntParam(default=13000)
     socket_mem = IntParam(default=2048)
 
     dev_intr_cpu = IntParam(default=0)
@@ -164,7 +165,8 @@ class OvSDPDKPvPRecipe(PingTestAndEvaluate, PerfTestAndEvaluate):
 
         config.guest.testpmd = guest.run(
                 TestPMD(
-                    coremask=self.params.guest_dpdk_cores,
+                    coremask=self.params.guest_testpmd_cores,
+                    pmd_coremask=self.params.guest_dpdk_cores,
                     nics=[nic.bus_info for nic in config.guest.nics],
                     peer_macs=[nic.hwaddr for nic in config.generator.nics]),
                 bg=True)
@@ -318,6 +320,10 @@ class OvSDPDKPvPRecipe(PingTestAndEvaluate, PerfTestAndEvaluate):
                       "emulatorpin",
                       cpuset=str(self.params.guest_emulatorpin_cpu))
 
+        memoryBacking = ET.SubElement(guest_xml, "memoryBacking")
+        hugepages = ET.SubElement(memoryBacking, "hugepages")
+        ET.SubElement(hugepages, "page", size="2",
unit="M", nodeset="0")
+
         return guest_xml
 
     def ovs_dpdk_bridge_vm_configuration(self, host_conf, guest_conf):
-- 
2.19.1