[dts] [Patch V1] framework/etgen.py : add this function to support ixia send fixed number of packets during a certain period, this is not for common use, only will be used for test_suite nic_single_core_perf

[wang fei]

Signed-off-by: wang fei <feix.y.wang at intel.com>
---
 framework/etgen.py | 34 ++++++++++++++++++++++++++++++++++
 1 file changed, 34 insertions(+)

diff --git a/framework/etgen.py b/framework/etgen.py
index b3a5931..7ef2598 100644
--- a/framework/etgen.py
+++ b/framework/etgen.py
@@ -868,3 +868,37 @@ class IxiaPacketGenerator(SSHConnection):
         retrieved capture buffer. Call packetGroupStats get before.
         """
         return self._packetgroup_cget_value('averageLatency')
+
+    def send_packets(self,portList,ratePercent,packetNum,delay=5,runTime=60):
+        """
+        configure ixia to send fixed number of packets for each tx port
+        and returns the throughput for rx ports
+        note that this funcion is only set for test_suite nic_single_core_perf,
+        not for common use
+        """
+        rxPortlist, txPortlist = self._configure_everything(portList, ratePercent)
+        time.sleep(delay)
+        self.send_expect("ixStopTransmit portList","%",5)
+
+        self.send_expect("stream config -numFrames %s" % packetNum,"%",5)
+        self.send_expect("stream config -dma stopStream","%",5)
+        for txPort in txPortlist:
+            port = self.pci_to_port(self.tester.get_pci(txPort))
+            self.send_expect("stream set %d %d %d 1" % (self.chasId, port['card'], port['port']),"%",5)
+
+        self.send_expect("ixWritePortsToHardware portList","%",5)
+        self.send_expect("ixClearStats portList","%",5)
+        self.send_expect("ixStartTransmit portList","%",5)
+        time.sleep(runTime)
+        time.sleep(3)
+
+        txPackets = 0
+        rxPackets = 0
+        for port in txPortlist:
+            self.stat_get_stat_all_stats(port)
+            txPackets += self.get_frames_sent()
+            rxPackets += self.get_frames_received()
+        self.logger.info("Transmitted packets :%s" % txPackets)
+        self.logger.info("Received packets :%s" % rxPackets)
+
+        return txPackets,rxPackets
\ No newline at end of file
-- 
2.7.4