[dts] support dpdk2.0 code

[huilongx xu <huilongx.xu@intel.com>]

From: huilong xu <huilongx.xu@intel.com>

changed list:
1. when start testpmd by pmd_output model, if testpmd parameter not include
   "--txqflags=0", add it. because in dpdk2.0 testpmd must used txqflags for
   open hardware features, egg: checsum offload, vlan
2. dut add a function set_default_corelist, if the server cores number more then   4, the default cores is 4. In test case you can used self.dut.default_cores
   to start app.

Signed-off-by: huilong xu <huilongx.xu@intel.com>
---
 framework/dut.py        |   11 +++++++++++
 framework/pmd_output.py |    3 +++
 2 files changed, 14 insertions(+), 0 deletions(-)

diff --git a/framework/dut.py b/framework/dut.py
index 5b7aba2..656fc78 100644
--- a/framework/dut.py
+++ b/framework/dut.py
@@ -140,6 +140,16 @@ class Dut(Crb):
         """
         return self.crb['pass']
 
+    def set_default_corelist(self):
+        """
+        set default cors list
+        """
+        core_num = len(self.cores)
+        if core_num <= 4:
+            self.default_cores = "1S/%dC/1T" % core_num
+        else:
+            self.default_cores = "1S/4C/1T"
+
     def dut_prerequisites(self):
         """
         Prerequest function should be called before execute any test case.
@@ -155,6 +165,7 @@ class Dut(Crb):
             self.send_expect('alias sed=gsed', '# ')
 
         self.init_core_list()
+        self.set_default_corelist()
         self.pci_devices_information()
         # scan ports before restore interface
         self.scan_ports()
diff --git a/framework/pmd_output.py b/framework/pmd_output.py
index 97274a5..78b4e4f 100644
--- a/framework/pmd_output.py
+++ b/framework/pmd_output.py
@@ -87,6 +87,9 @@ class PmdOutput():
         return self.command
 
     def start_testpmd(self, cores, param='', eal_param='', socket=0):
+        if "--txqflags" not in param:
+            param += "  --txqflags=0"
+
         core_list = self.dut.get_core_list(cores, socket)
         self.coremask = dts.create_mask(core_list)
         command = "./%s/app/testpmd -c %s -n %d %s -- -i %s" \
-- 
1.7.4.4