[dts] [PATCH] framework: enable RFC2544 support

[Ding Heng]

Enable RFC2544 support for dts framework, add "delay" parameter for some of the
functions in file etgen.py and tester.py to make sure that test cases could
control the time to run.

Signed-off-by: Ding Heng <hengx.ding at intel.com>

diff --git a/framework/etgen.py b/framework/etgen.py
index 508439b..37c4ff3 100644
--- a/framework/etgen.py
+++ b/framework/etgen.py
@@ -476,18 +476,18 @@ class IxiaPacketGenerator(SSHConnection):
 
         return {'card': int(m.group(1)), 'port': int(m.group(2))}
 
-    def loss(self, portList, ratePercent):
+    def loss(self, portList, ratePercent, delay=5):
         """
         Run loss performance test and return loss rate.
         """
         rxPortlist, txPortlist = self._configure_everything(portList, ratePercent)
-        return self.get_loss_packet_rate(rxPortlist, txPortlist)
+        return self.get_loss_packet_rate(rxPortlist, txPortlist, delay)
 
-    def get_loss_packet_rate(self, rxPortlist, txPortlist):
+    def get_loss_packet_rate(self, rxPortlist, txPortlist, delay=5):
         """
         Get RX/TX packet statistics and calculate loss rate.
         """
-        time.sleep(3)
+        time.sleep(delay)
 
         self.send_expect("ixStopTransmit portList", "%", 10)
         time.sleep(2)
@@ -507,7 +507,7 @@ class IxiaPacketGenerator(SSHConnection):
             revNumber += self.get_frames_received()
         self.logger.info("rev  :%f" % revNumber)
 
-        return float(sendNumber - revNumber) / sendNumber
+        return float(sendNumber - revNumber) / sendNumber, sendNumber, revNumber
 
     def latency(self, portList, ratePercent, delay=5):
         """
@@ -801,7 +801,10 @@ class IxiaPacketGenerator(SSHConnection):
         Returns the number of packets captured by IXIA on a previously set
         port. Call self.stat_get_stat_all_stats(port) before.
         """
-        return self._stat_cget_value('framesReceived')
+        if self._stat_cget_value('framesReceived') !=0:
+            return self._stat_cget_value('framesReceived')
+        else:
+            return self._stat_cget_value('oversize')
 
     def get_flow_control_frames(self):
         """
diff --git a/framework/tester.py b/framework/tester.py
index b102065..9446854 100644
--- a/framework/tester.py
+++ b/framework/tester.py
@@ -413,8 +413,33 @@ class Tester(Crb):
             self.logger.warning("exception by mixed port types")
             return None
         return self.packet_gen.throughput(portList, rate_percent)
+    def run_rfc2544(self, portlist, delay=120):
+        """
+        zero_rate: dpdk will not lost packet in this line rate.
+        loss_rate: dpdk will loss packet in this line rate.
+        test_rate: the line rate we are going to test.
+        """
+        zero_rate = 0.0
+        loss_rate = 100.0
+        test_rate = 100.0
+
+        while (loss_rate - zero_rate) > 0.002:
+                self.logger.info("test rate: %f " % test_rate)
+                if test_rate == 100:
+                        lost, tx_num, rx_num = self.traffic_generator_loss(portlist, test_rate, delay)
+                else:
+                        lost, _, _ = self.traffic_generator_loss(portlist, test_rate, delay)
+                if lost != 0:
+                        loss_rate = test_rate
+                        test_rate = (test_rate + zero_rate)/2
+                else:
+                        zero_rate = test_rate
+                        test_rate = (test_rate + loss_rate)/2
+
+        self.logger.info("zero loss rate is %s" % test_rate)
+        return test_rate, tx_num, rx_num
 
-    def traffic_generator_loss(self, portList, ratePercent):
+    def traffic_generator_loss(self, portList, ratePercent, delay=60):
         """
         Run loss performance test on specified ports.
         """
@@ -423,7 +448,7 @@ class Tester(Crb):
         elif not self.check_port_list(portList):
             self.logger.warning("exception by mixed port types")
             return None
-        return self.packet_gen.loss(portList, ratePercent)
+        return self.packet_gen.loss(portList, ratePercenti, delay)
 
     def traffic_generator_latency(self, portList, ratePercent=100, delay=5):
         """
-- 
1.9.3