diff --git a/tests/TestSuite_vm2vm_virtio_net_perf.py b/tests/TestSuite_vm2vm_virtio_net_perf.py
index 486f1acf..8c234c24 100644
--- a/tests/TestSuite_vm2vm_virtio_net_perf.py
+++ b/tests/TestSuite_vm2vm_virtio_net_perf.py
@@ -38,7 +38,6 @@ vm2vm split ring and packed ring vhost-user/virtio-net check the payload of larg
 mergeable and non-mergeable dequeue zero copy.
 please use qemu version greater 4.1.94 which support packed feathur to test this suite.
 """
-import random
 import re
 import string
 import time
@@ -71,12 +70,6 @@ class TestVM2VMVirtioNetPerf(TestCase):
         self.vhost = self.dut.new_session(suite="vhost")
         self.pmd_vhost = PmdOutput(self.dut, self.vhost)
         self.app_testpmd_path = self.dut.apps_name["test-pmd"]
-        # get cbdma device
-        self.cbdma_dev_infos = []
-        self.dmas_info = None
-        self.device_str = None
-        self.checked_vm = False
-        self.dut.restore_interfaces()
 
     def set_up(self):
         """
@@ -86,158 +79,29 @@ class TestVM2VMVirtioNetPerf(TestCase):
         self.vm_dut = []
         self.vm = []
 
-    def get_cbdma_ports_info_and_bind_to_dpdk(
-        self, cbdma_num=2, allow_diff_socket=False
-    ):
-        """
-        get all cbdma ports
-        """
-        out = self.dut.send_expect(
-            "./usertools/dpdk-devbind.py --status-dev dma", "# ", 30
-        )
-        device_info = out.split("\n")
-        for device in device_info:
-            pci_info = re.search("\s*(0000:\S*:\d*.\d*)", device)
-            if pci_info is not None:
-                dev_info = pci_info.group(1)
-                # the numa id of ioat dev, only add the device which on same socket with nic dev
-                bus = int(dev_info[5:7], base=16)
-                if bus >= 128:
-                    cur_socket = 1
-                else:
-                    cur_socket = 0
-                if allow_diff_socket:
-                    self.cbdma_dev_infos.append(pci_info.group(1))
-                else:
-                    if self.ports_socket == cur_socket:
-                        self.cbdma_dev_infos.append(pci_info.group(1))
-        self.verify(
-            len(self.cbdma_dev_infos) >= cbdma_num,
-            "There no enough cbdma device to run this suite",
-        )
-        used_cbdma = self.cbdma_dev_infos[0:cbdma_num]
-        dmas_info = ""
-        for dmas in used_cbdma[0 : int(cbdma_num / 2)]:
-            number = used_cbdma[0 : int(cbdma_num / 2)].index(dmas)
-            dmas = "txq{}@{},".format(number, dmas)
-            dmas_info += dmas
-        for dmas in used_cbdma[int(cbdma_num / 2) :]:
-            number = used_cbdma[int(cbdma_num / 2) :].index(dmas)
-            dmas = "txq{}@{},".format(number, dmas)
-            dmas_info += dmas
-        self.dmas_info = dmas_info[:-1]
-        self.device_str = " ".join(used_cbdma)
-        self.dut.send_expect(
-            "./usertools/dpdk-devbind.py --force --bind=%s %s"
-            % (self.drivername, self.device_str),
-            "# ",
-            60,
-        )
-
-    def bind_cbdma_device_to_kernel(self):
-        if self.device_str is not None:
-            self.dut.send_expect("modprobe ioatdma", "# ")
-            self.dut.send_expect(
-                "./usertools/dpdk-devbind.py -u %s" % self.device_str, "# ", 30
-            )
-            self.dut.send_expect(
-                "./usertools/dpdk-devbind.py --force --bind=ioatdma  %s"
-                % self.device_str,
-                "# ",
-                60,
-            )
-
-    @property
-    def check_2m_env(self):
-        out = self.dut.send_expect(
-            "cat /proc/meminfo |grep Hugepagesize|awk '{print($2)}'", "# "
-        )
-        return True if out == "2048" else False
-
     def start_vhost_testpmd(
         self,
-        cbdma=False,
         no_pci=True,
-        client_mode=False,
-        enable_queues=1,
-        nb_cores=2,
-        rxq_txq=None,
-        exchange_cbdma=False,
-        iova_mode="",
     ):
         """
         launch the testpmd with different parameters
         """
-        if cbdma is True:
-            dmas_info_list = self.dmas_info.split(",")
-            cbdma_arg_0_list = []
-            cbdma_arg_1_list = []
-            for item in dmas_info_list:
-                if dmas_info_list.index(item) < int(len(dmas_info_list) / 2):
-                    cbdma_arg_0_list.append(item)
-                else:
-                    cbdma_arg_1_list.append(item)
-            cbdma_arg_0 = ",dmas=[{}]".format(";".join(cbdma_arg_0_list))
-            cbdma_arg_1 = ",dmas=[{}]".format(";".join(cbdma_arg_1_list))
-        else:
-            cbdma_arg_0 = ""
-            cbdma_arg_1 = ""
         testcmd = self.app_testpmd_path + " "
-        if not client_mode:
-            vdev1 = "--vdev 'net_vhost0,iface=%s/vhost-net0,queues=%d%s' " % (
-                self.base_dir,
-                enable_queues,
-                cbdma_arg_0,
-            )
-            vdev2 = "--vdev 'net_vhost1,iface=%s/vhost-net1,queues=%d%s' " % (
-                self.base_dir,
-                enable_queues,
-                cbdma_arg_1,
-            )
-        else:
-            vdev1 = "--vdev 'net_vhost0,iface=%s/vhost-net0,client=1,queues=%d%s' " % (
-                self.base_dir,
-                enable_queues,
-                cbdma_arg_0,
-            )
-            vdev2 = "--vdev 'net_vhost1,iface=%s/vhost-net1,client=1,queues=%d%s' " % (
-                self.base_dir,
-                enable_queues,
-                cbdma_arg_1,
-            )
-        if exchange_cbdma:
-            vdev1 = "--vdev 'net_vhost0,iface=%s/vhost-net0,client=1,queues=%d%s' " % (
-                self.base_dir,
-                enable_queues,
-                cbdma_arg_1,
-            )
-            vdev2 = "--vdev 'net_vhost1,iface=%s/vhost-net1,client=1,queues=%d%s' " % (
-                self.base_dir,
-                enable_queues,
-                cbdma_arg_0,
-            )
-
+        vdev1 = "--vdev 'net_vhost0,iface=%s/vhost-net0,queues=1' " % (
+            self.base_dir
+        )
+        vdev2 = "--vdev 'net_vhost1,iface=%s/vhost-net1,queues=1' " % (
+            self.base_dir
+        )
         eal_params = self.dut.create_eal_parameters(
             cores=self.cores_list, prefix="vhost", no_pci=no_pci
         )
-        if rxq_txq is None:
-            params = " -- -i --nb-cores=%d --txd=1024 --rxd=1024" % nb_cores
-        else:
-            params = " -- -i --nb-cores=%d --txd=1024 --rxd=1024 --rxq=%d --txq=%d" % (
-                nb_cores,
-                rxq_txq,
-                rxq_txq,
-            )
-        if iova_mode:
-            iova_parm = " --iova=" + iova_mode
-        else:
-            iova_parm = ""
-        self.command_line = testcmd + eal_params + vdev1 + vdev2 + iova_parm + params
+        params = " -- -i --nb-cores=2 --txd=1024 --rxd=1024"
+        self.command_line = testcmd + eal_params + vdev1 + vdev2 + params
         self.pmd_vhost.execute_cmd(self.command_line, timeout=30)
-        self.pmd_vhost.execute_cmd("vhost enable tx all", timeout=30)
         self.pmd_vhost.execute_cmd("start", timeout=30)
 
-    def start_vms(self, server_mode=False, opt_queue=None, vm_config="vhost_sample"):
+    def start_vms(self, vm_config="vhost_sample"):
         """
         start two VM, each VM has one virtio device
         """
@@ -246,12 +110,7 @@ class TestVM2VMVirtioNetPerf(TestCase):
             vm_info = VM(self.dut, "vm%d" % i, vm_config)
             vm_params = {}
             vm_params["driver"] = "vhost-user"
-            if not server_mode:
-                vm_params["opt_path"] = self.base_dir + "/vhost-net%d" % i
-            else:
-                vm_params["opt_path"] = self.base_dir + "/vhost-net%d" % i + ",server"
-            if opt_queue is not None:
-                vm_params["opt_queue"] = opt_queue
+            vm_params["opt_path"] = self.base_dir + "/vhost-net%d" % i
             vm_params["opt_mac"] = "52:54:00:00:00:0%d" % (i + 1)
             vm_params["opt_settings"] = self.vm_args
             vm_info.set_vm_device(**vm_params)
@@ -265,23 +124,15 @@ class TestVM2VMVirtioNetPerf(TestCase):
             self.vm_dut.append(vm_dut)
             self.vm.append(vm_info)
 
-    def config_vm_env(self, combined=False, rxq_txq=1):
+    def config_vm_env(self):
         """
         set virtio device IP and run arp protocal
         """
         vm1_intf = self.vm_dut[0].ports_info[0]["intf"]
         vm2_intf = self.vm_dut[1].ports_info[0]["intf"]
-        if combined:
-            self.vm_dut[0].send_expect(
-                "ethtool -L %s combined %d" % (vm1_intf, rxq_txq), "#", 10
-            )
         self.vm_dut[0].send_expect(
             "ifconfig %s %s" % (vm1_intf, self.virtio_ip1), "#", 10
         )
-        if combined:
-            self.vm_dut[1].send_expect(
-                "ethtool -L %s combined %d" % (vm2_intf, rxq_txq), "#", 10
-            )
         self.vm_dut[1].send_expect(
             "ifconfig %s %s" % (vm2_intf, self.virtio_ip2), "#", 10
         )
@@ -292,87 +143,22 @@ class TestVM2VMVirtioNetPerf(TestCase):
             "arp -s %s %s" % (self.virtio_ip1, self.virtio_mac1), "#", 10
         )
 
-    def prepare_test_env(
-        self,
-        cbdma=False,
-        no_pci=True,
-        client_mode=False,
-        enable_queues=1,
-        nb_cores=2,
-        server_mode=False,
-        opt_queue=None,
-        combined=False,
-        rxq_txq=None,
-        iova_mode="",
-    ):
-        """
-        start vhost testpmd and qemu, and config the vm env
-        """
-        self.start_vhost_testpmd(
-            cbdma=cbdma,
-            no_pci=no_pci,
-            client_mode=client_mode,
-            enable_queues=enable_queues,
-            nb_cores=nb_cores,
-            rxq_txq=rxq_txq,
-            iova_mode=iova_mode,
-        )
-        self.start_vms(server_mode=server_mode, opt_queue=opt_queue)
-        self.config_vm_env(combined=combined, rxq_txq=rxq_txq)
-
     def start_iperf(self, iperf_mode="tso"):
         """
         run perf command between to vms
         """
         # clear the port xstats before iperf
         self.vhost.send_expect("clear port xstats all", "testpmd> ", 10)
-
-        # add -f g param, use Gbits/sec report teste result
         if iperf_mode == "tso":
-            iperf_server = "iperf -s -i 1"
-            iperf_client = "iperf -c 1.1.1.2 -i 1 -t 60"
+            server = "iperf -s -i 1"
+            client = "iperf -c 1.1.1.2 -i 1 -t 60"
         elif iperf_mode == "ufo":
-            iperf_server = "iperf -s -u -i 1"
-            iperf_client = "iperf -c 1.1.1.2 -i 1 -t 30 -P 4 -u -b 1G -l 9000"
-        self.vm_dut[0].send_expect("%s > iperf_server.log &" % iperf_server, "", 10)
-        self.vm_dut[1].send_expect("%s > iperf_client.log &" % iperf_client, "", 60)
+            server = "iperf -s -u -i 1"
+            client = "iperf -c 1.1.1.2 -i 1 -t 60 -P 4 -u -b 1G -l 9000"
+        self.vm_dut[0].send_expect("%s > iperf_server.log &" % server, "", 10)
+        self.vm_dut[1].send_expect("%s > iperf_client.log &" % client, "", 10)
         time.sleep(90)
 
-    def get_perf_result(self):
-        """
-        get the iperf test result
-        """
-        self.table_header = ["Mode", "[M|G]bits/sec"]
-        self.result_table_create(self.table_header)
-        self.vm_dut[0].send_expect("pkill iperf", "# ")
-        self.vm_dut[1].session.copy_file_from("%s/iperf_client.log" % self.dut.base_dir)
-        fp = open("./iperf_client.log")
-        fmsg = fp.read()
-        fp.close()
-        # remove the server report info from msg
-        index = fmsg.find("Server Report")
-        if index != -1:
-            fmsg = fmsg[:index]
-        iperfdata = re.compile("\S*\s*[M|G]bits/sec").findall(fmsg)
-        # the last data of iperf is the ave data from 0-30 sec
-        self.verify(len(iperfdata) != 0, "The iperf data between to vms is 0")
-        self.verify(
-            (iperfdata[-1]).split()[1] == "Gbits/sec",
-            "The iperf data is %s,Can't reach Gbits/sec" % iperfdata[-1],
-        )
-        self.logger.info("The iperf data between vms is %s" % iperfdata[-1])
-
-        # put the result to table
-        results_row = ["vm2vm", iperfdata[-1]]
-        self.result_table_add(results_row)
-
-        # print iperf resut
-        self.result_table_print()
-        # rm the iperf log file in vm
-        self.vm_dut[0].send_expect("rm iperf_server.log", "#", 10)
-        self.vm_dut[1].send_expect("rm iperf_client.log", "#", 10)
-        return float(iperfdata[-1].split()[0])
-
     def verify_xstats_info_on_vhost(self):
         """
         check both 2VMs can receive and send big packets to each other
@@ -390,16 +176,6 @@ class TestVM2VMVirtioNetPerf(TestCase):
             int(tx_info.group(1)) > 0, "Port 0 not forward packet greater than 1522"
         )
 
-    def start_iperf_and_verify_vhost_xstats_info(self, iperf_mode="tso"):
-        """
-        start to send packets and verify vm can received data of iperf
-        and verify the vhost can received big pkts in testpmd
-        """
-        self.start_iperf(iperf_mode)
-        iperfdata = self.get_perf_result()
-        self.verify_xstats_info_on_vhost()
-        return iperfdata
-
     def stop_all_apps(self):
         for i in range(len(self.vm)):
             self.vm[i].stop()
@@ -434,557 +210,76 @@ class TestVM2VMVirtioNetPerf(TestCase):
             "tx-tcp6-segmentation in vm not right",
         )
 
-    def check_scp_file_valid_between_vms(self, file_size=1024):
-        """
-        scp file form VM1 to VM2, check the data is valid
-        """
-        # default file_size=1024K
-        data = ""
-        for char in range(file_size * 1024):
-            data += random.choice(self.random_string)
-        self.vm_dut[0].send_expect('echo "%s" > /tmp/payload' % data, "# ")
-        # scp this file to vm1
-        out = self.vm_dut[1].send_command(
-            "scp root@%s:/tmp/payload /root" % self.virtio_ip1, timeout=5
-        )
-        if "Are you sure you want to continue connecting" in out:
-            self.vm_dut[1].send_command("yes", timeout=3)
-        self.vm_dut[1].send_command(self.vm[0].password, timeout=3)
-        # get the file info in vm1, and check it valid
-        md5_send = self.vm_dut[0].send_expect("md5sum /tmp/payload", "# ")
-        md5_revd = self.vm_dut[1].send_expect("md5sum /root/payload", "# ")
-        md5_send = md5_send[: md5_send.find(" ")]
-        md5_revd = md5_revd[: md5_revd.find(" ")]
-        self.verify(
-            md5_send == md5_revd, "the received file is different with send file"
-        )
-
     def test_vm2vm_split_ring_iperf_with_tso(self):
         """
         TestCase1: VM2VM split ring vhost-user/virtio-net test with tcp traffic
         """
         self.vm_args = "disable-modern=false,mrg_rxbuf=off,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on"
-        self.prepare_test_env(
-            cbdma=False,
-            no_pci=True,
-            client_mode=False,
-            enable_queues=1,
-            nb_cores=2,
-            server_mode=False,
-            opt_queue=1,
-            combined=False,
-            rxq_txq=None,
-        )
-        self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-
-    def test_vm2vm_split_ring_with_tso_and_cbdma_enable(self):
-        """
-        TestCase2: VM2VM split ring vhost-user/virtio-net CBDMA enable test with tcp traffic
-        """
-        self.vm_args = "disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on"
-        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=2)
-        self.prepare_test_env(
-            cbdma=True,
-            no_pci=False,
-            client_mode=False,
-            enable_queues=1,
-            nb_cores=2,
-            server_mode=False,
-            opt_queue=1,
-            combined=False,
-            rxq_txq=None,
-        )
-        cbdma_value = self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-        expect_value = self.get_suite_cfg()["expected_throughput"][
-            "test_vm2vm_split_ring_iperf_with_tso"
-        ]
-        self.verify(
-            cbdma_value > expect_value,
-            "CBDMA enable performance: %s is lower than CBDMA disable: %s."
-            % (cbdma_value, expect_value),
-        )
+        self.start_vhost_testpmd()
+        self.start_vms()
+        self.config_vm_env()
+        self.start_iperf(iperf_mode='tso')
+        self.verify_xstats_info_on_vhost()
 
     def test_vm2vm_split_ring_iperf_with_ufo(self):
         """
-        TestCase3: VM2VM split ring vhost-user/virtio-net test with udp traffic
+        TestCase2: VM2VM split ring vhost-user/virtio-net test with udp traffic
         """
         self.vm_args = "disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on"
-        self.prepare_test_env(
-            cbdma=False,
-            no_pci=True,
-            client_mode=False,
-            enable_queues=1,
-            nb_cores=1,
-            server_mode=False,
-            opt_queue=1,
-            combined=False,
-            rxq_txq=None,
-        )
-        self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="ufo")
+        self.start_vhost_testpmd()
+        self.start_vms()
+        self.config_vm_env()
+        self.start_iperf(iperf_mode='ufo')
+        self.verify_xstats_info_on_vhost()
 
     def test_vm2vm_split_ring_device_capbility(self):
         """
-        TestCase4: Check split ring virtio-net device capability
+        TestCase3: Check split ring virtio-net device capability
         """
         self.vm_args = "disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on"
-        self.start_vhost_testpmd(
-            cbdma=False,
-            no_pci=True,
-            client_mode=False,
-            enable_queues=1,
-            nb_cores=2,
-            rxq_txq=None,
-        )
+        self.start_vhost_testpmd()
         self.start_vms()
         self.offload_capbility_check(self.vm_dut[0])
         self.offload_capbility_check(self.vm_dut[1])
 
-    def test_vm2vm_split_ring_with_mergeable_path_check_large_packet_and_cbdma_enable_8queue(
-        self,
-    ):
-        """
-        TestCase5: VM2VM virtio-net split ring mergeable CBDMA enable test with large packet payload valid check
-        """
-        ipef_result = []
-        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=16, allow_diff_socket=True)
-
-        self.logger.info("Launch vhost with CBDMA and with 8 queue with VA mode")
-        self.vm_args = "disable-modern=false,mrg_rxbuf=on,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on"
-        self.prepare_test_env(
-            cbdma=True,
-            no_pci=False,
-            client_mode=True,
-            enable_queues=8,
-            nb_cores=4,
-            server_mode=True,
-            opt_queue=8,
-            combined=True,
-            rxq_txq=8,
-            iova_mode="va",
-        )
-        self.check_scp_file_valid_between_vms()
-        iperf_data_cbdma_enable_8_queue = self.start_iperf_and_verify_vhost_xstats_info(
-            iperf_mode="tso"
-        )
-        ipef_result.append(
-            [
-                "Enable",
-                "mergeable path with VA mode",
-                8,
-                iperf_data_cbdma_enable_8_queue,
-            ]
-        )
-
-        self.logger.info("Re-launch and exchange CBDMA and with 8 queue with VA mode")
-        self.vhost.send_expect("quit", "# ", 30)
-        self.start_vhost_testpmd(
-            cbdma=True,
-            no_pci=False,
-            client_mode=True,
-            enable_queues=8,
-            nb_cores=4,
-            rxq_txq=8,
-            exchange_cbdma=True,
-            iova_mode="va",
-        )
-        self.check_scp_file_valid_between_vms()
-        iperf_data_cbdma_enable_8_queue_exchange = (
-            self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-        )
-        ipef_result.append(
-            [
-                "Disable",
-                "mergeable path exchange CBDMA with VA mode",
-                8,
-                iperf_data_cbdma_enable_8_queue_exchange,
-            ]
-        )
-
-        # This test step need to test on 1G guest hugepage ENV.
-        if not self.check_2m_env:
-            self.logger.info(
-                "Re-launch and exchange CBDMA and with 8 queue with PA mode"
-            )
-            self.vhost.send_expect("quit", "# ", 30)
-            self.start_vhost_testpmd(
-                cbdma=True,
-                no_pci=False,
-                client_mode=True,
-                enable_queues=8,
-                nb_cores=4,
-                rxq_txq=8,
-                exchange_cbdma=True,
-                iova_mode="pa",
-            )
-            self.check_scp_file_valid_between_vms()
-            iperf_data_cbdma_enable_8_queue_exchange_pa = (
-                self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-            )
-            ipef_result.append(
-                [
-                    "Disable",
-                    "mergeable path exchange CBDMA with PA mode",
-                    8,
-                    iperf_data_cbdma_enable_8_queue_exchange_pa,
-                ]
-            )
-
-        self.logger.info("Re-launch without CBDMA and with 4 queue")
-        self.vhost.send_expect("quit", "# ", 30)
-        self.start_vhost_testpmd(
-            cbdma=False,
-            no_pci=False,
-            client_mode=True,
-            enable_queues=4,
-            nb_cores=4,
-            rxq_txq=4,
-        )
-        self.config_vm_env(combined=True, rxq_txq=4)
-        self.check_scp_file_valid_between_vms()
-        iperf_data_cbdma_disable_4_queue = (
-            self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-        )
-        ipef_result.append(
-            [
-                "Disable",
-                "mergeable path without CBDMA with 4 queue",
-                4,
-                iperf_data_cbdma_disable_4_queue,
-            ]
-        )
-
-        self.logger.info("Re-launch without CBDMA and with 1 queue")
-        self.vhost.send_expect("quit", "# ", 30)
-        self.start_vhost_testpmd(
-            cbdma=False,
-            no_pci=False,
-            client_mode=True,
-            enable_queues=4,
-            nb_cores=4,
-            rxq_txq=1,
-        )
-        self.config_vm_env(combined=True, rxq_txq=1)
-        self.check_scp_file_valid_between_vms()
-        iperf_data_cbdma_disable_1_queue = (
-            self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-        )
-        ipef_result.append(
-            [
-                "Disable",
-                "mergeable path without CBDMA with 1 queue",
-                1,
-                iperf_data_cbdma_disable_1_queue,
-            ]
-        )
-
-        self.table_header = ["CBDMA Enable/Disable", "Mode", "rxq/txq", "Gbits/sec"]
-        self.result_table_create(self.table_header)
-        for table_row in ipef_result:
-            self.result_table_add(table_row)
-        self.result_table_print()
-        self.verify(
-            iperf_data_cbdma_enable_8_queue > iperf_data_cbdma_disable_4_queue,
-            "CMDMA enable: %s is lower than CBDMA disable: %s"
-            % (iperf_data_cbdma_enable_8_queue, iperf_data_cbdma_disable_4_queue),
-        )
-
-    def test_vm2vm_split_ring_with_no_mergeable_path_check_large_packet_and_cbdma_enable_8queue(
-        self,
-    ):
-        """
-        TestCase6: VM2VM virtio-net split ring non-mergeable CBDMA enable test with large packet payload valid check
-        """
-        ipef_result = []
-        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=16, allow_diff_socket=True)
-
-        self.logger.info("Launch vhost-testpmd with CBDMA and used 8 queue")
-        self.vm_args = "disable-modern=false,mrg_rxbuf=off,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on"
-        self.prepare_test_env(
-            cbdma=True,
-            no_pci=False,
-            client_mode=True,
-            enable_queues=8,
-            nb_cores=4,
-            server_mode=True,
-            opt_queue=8,
-            combined=True,
-            rxq_txq=8,
-        )
-        self.check_scp_file_valid_between_vms()
-        iperf_data_cbdma_enable_8_queue = self.start_iperf_and_verify_vhost_xstats_info(
-            iperf_mode="tso"
-        )
-        ipef_result.append(
-            ["Enable", "no-mergeable path", 8, iperf_data_cbdma_enable_8_queue]
-        )
-
-        self.logger.info("Re-launch without CBDMA and used 8 queue")
-        self.vhost.send_expect("quit", "# ", 30)
-        self.start_vhost_testpmd(
-            cbdma=False,
-            no_pci=False,
-            client_mode=True,
-            enable_queues=8,
-            nb_cores=4,
-            rxq_txq=8,
-        )
-        self.check_scp_file_valid_between_vms()
-        iperf_data_cbdma_disable_8_queue = (
-            self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-        )
-        ipef_result.append(
-            ["Disable", "no-mergeable path", 8, iperf_data_cbdma_disable_8_queue]
-        )
-
-        self.logger.info("Re-launch without CBDMA and used 1 queue")
-        self.vhost.send_expect("quit", "# ", 30)
-        self.start_vhost_testpmd(
-            cbdma=False,
-            no_pci=False,
-            client_mode=True,
-            enable_queues=8,
-            nb_cores=4,
-            rxq_txq=1,
-        )
-        self.config_vm_env(combined=True, rxq_txq=1)
-        self.check_scp_file_valid_between_vms()
-        iperf_data_cbdma_disable_1_queue = (
-            self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-        )
-        ipef_result.append(
-            ["Disable", "no-mergeable path", 1, iperf_data_cbdma_disable_1_queue]
-        )
-
-        self.table_header = ["CBDMA Enable/Disable", "Mode", "rxq/txq", "Gbits/sec"]
-        self.result_table_create(self.table_header)
-        for table_row in ipef_result:
-            self.result_table_add(table_row)
-        self.result_table_print()
-        self.verify(
-            iperf_data_cbdma_enable_8_queue > iperf_data_cbdma_disable_8_queue,
-            "CMDMA enable: %s is lower than CBDMA disable: %s"
-            % (iperf_data_cbdma_enable_8_queue, iperf_data_cbdma_disable_8_queue),
-        )
-
     def test_vm2vm_packed_ring_iperf_with_tso(self):
         """
-        TestCase7: VM2VM packed ring vhost-user/virtio-net test with tcp traffic
-        """
-        self.vm_args = "disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on"
-        self.prepare_test_env(
-            cbdma=False,
-            no_pci=True,
-            client_mode=False,
-            enable_queues=1,
-            nb_cores=2,
-            server_mode=False,
-            opt_queue=1,
-            combined=False,
-            rxq_txq=None,
-        )
-        self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-
-    def test_vm2vm_packed_ring_iperf_with_tso_and_cbdma_enable(self):
-        """
-        TestCase8: VM2VM packed ring vhost-user/virtio-net CBDMA enable test with tcp traffic
+        TestCase4: VM2VM packed ring vhost-user/virtio-net test with tcp traffic
         """
-        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=2)
         self.vm_args = "disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on"
-        self.prepare_test_env(
-            cbdma=True,
-            no_pci=False,
-            client_mode=False,
-            enable_queues=1,
-            nb_cores=2,
-            server_mode=False,
-            opt_queue=None,
-            combined=False,
-            rxq_txq=None,
-        )
-        self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
+        self.start_vhost_testpmd()
+        self.start_vms()
+        self.config_vm_env()
+        self.start_iperf(iperf_mode='tso')
+        self.verify_xstats_info_on_vhost()
 
     def test_vm2vm_packed_ring_iperf_with_ufo(self):
         """
-        Test Case 9: VM2VM packed ring vhost-user/virtio-net test with udp trafficc
+        Test Case 5: VM2VM packed ring vhost-user/virtio-net test with udp trafficc
         """
         self.vm_args = "disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on"
-        self.prepare_test_env(
-            cbdma=False,
-            no_pci=True,
-            client_mode=False,
-            enable_queues=1,
-            nb_cores=2,
-            server_mode=False,
-            opt_queue=None,
-            combined=False,
-            rxq_txq=None,
-        )
-        self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="ufo")
+        self.start_vhost_testpmd()
+        self.start_vms()
+        self.config_vm_env()
+        self.start_iperf(iperf_mode='ufo')
+        self.verify_xstats_info_on_vhost()
 
     def test_vm2vm_packed_ring_device_capbility(self):
         """
-        Test Case 10: Check packed ring virtio-net device capability
+        Test Case 6: Check packed ring virtio-net device capability
         """
         self.vm_args = "disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on"
-        self.start_vhost_testpmd(
-            cbdma=False,
-            no_pci=True,
-            client_mode=False,
-            enable_queues=1,
-            nb_cores=2,
-            rxq_txq=None,
-        )
+        self.start_vhost_testpmd()
         self.start_vms()
         self.offload_capbility_check(self.vm_dut[0])
         self.offload_capbility_check(self.vm_dut[1])
 
-    def test_vm2vm_packed_ring_with_mergeable_path_check_large_packet_and_cbdma_enable_8queue(
-        self,
-    ):
-        """
-        Test Case 11: VM2VM virtio-net packed ring mergeable 8 queues CBDMA enable test with large packet payload valid check
-        """
-        ipef_result = []
-        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=16, allow_diff_socket=True)
-
-        self.logger.info("Launch vhost-testpmd with CBDMA and used 8 queue")
-        self.vm_args = "disable-modern=false,mrg_rxbuf=on,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on,packed=on"
-        self.prepare_test_env(
-            cbdma=True,
-            no_pci=False,
-            client_mode=False,
-            enable_queues=8,
-            nb_cores=4,
-            server_mode=False,
-            opt_queue=8,
-            combined=True,
-            rxq_txq=8,
-        )
-        for i in range(0, 5):
-            self.check_scp_file_valid_between_vms()
-            iperf_data_cbdma_enable_8_queue = (
-                self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-            )
-            ipef_result.append(
-                ["Enable_%d" % i, "mergeable path", 8, iperf_data_cbdma_enable_8_queue]
-            )
-            self.table_header = ["CBDMA Enable/Disable", "Mode", "rxq/txq", "Gbits/sec"]
-            self.result_table_create(self.table_header)
-        for table_row in ipef_result:
-            self.result_table_add(table_row)
-        self.result_table_print()
-
-    def test_vm2vm_packed_ring_with_no_mergeable_path_check_large_packet_and_cbdma_enable_8queue(
-        self,
-    ):
-        """
-        Test Case 12: VM2VM virtio-net packed ring non-mergeable 8 queues CBDMA enable test with large packet payload valid check
-        """
-        ipef_result = []
-        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=16, allow_diff_socket=True)
-
-        self.logger.info("Launch vhost-testpmd with CBDMA and used 8 queue")
-        self.vm_args = "disable-modern=false,mrg_rxbuf=off,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on,packed=on"
-        self.prepare_test_env(
-            cbdma=True,
-            no_pci=False,
-            client_mode=False,
-            enable_queues=8,
-            nb_cores=4,
-            server_mode=False,
-            opt_queue=8,
-            combined=True,
-            rxq_txq=8,
-        )
-        for i in range(0, 5):
-            self.check_scp_file_valid_between_vms()
-            iperf_data_cbdma_enable_8_queue = (
-                self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-            )
-            ipef_result.append(
-                ["Enable", "mergeable path", 8, iperf_data_cbdma_enable_8_queue]
-            )
-            self.table_header = ["CBDMA Enable/Disable", "Mode", "rxq/txq", "Gbits/sec"]
-            self.result_table_create(self.table_header)
-        for table_row in ipef_result:
-            self.result_table_add(table_row)
-        self.result_table_print()
-
-    def test_vm2vm_packed_ring_with_tso_and_cbdma_enable_iova_pa(self):
-        """
-        Test Case 13: VM2VM packed ring vhost-user/virtio-net CBDMA enable test with tcp traffic when set iova=pa
-        """
-        # This test case need to test on 1G guest hugepage ENV.
-        self.vm_args = "disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,packed=on"
-        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=2)
-        self.prepare_test_env(
-            cbdma=True,
-            no_pci=False,
-            client_mode=False,
-            enable_queues=1,
-            nb_cores=2,
-            server_mode=False,
-            opt_queue=1,
-            combined=False,
-            rxq_txq=None,
-            iova_mode="pa",
-        )
-        self.check_scp_file_valid_between_vms()
-        cbdma_value = self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-        expect_value = self.get_suite_cfg()["expected_throughput"][
-            "test_vm2vm_split_ring_iperf_with_tso"
-        ]
-        self.verify(
-            cbdma_value > expect_value,
-            "CBDMA enable performance: %s is lower than CBDMA disable: %s."
-            % (cbdma_value, expect_value),
-        )
-
-    def test_vm2vm_packed_ring_with_mergeable_path_check_large_packet_and_cbdma_enable_8queue_iova_pa(
-        self,
-    ):
-        """
-        Test Case 14: VM2VM virtio-net packed ring mergeable 8 queues CBDMA enable and PA mode test with large packet payload valid check
-        """
-        # This test case need to test on 1G guest hugepage ENV.
-        ipef_result = []
-        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=16, allow_diff_socket=True)
-
-        self.logger.info("Launch vhost-testpmd with CBDMA and used 8 queue")
-        self.vm_args = "disable-modern=false,mrg_rxbuf=on,mq=on,vectors=40,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on,guest_ufo=on,host_ufo=on,packed=on"
-        self.prepare_test_env(
-            cbdma=True,
-            no_pci=False,
-            client_mode=False,
-            enable_queues=8,
-            nb_cores=4,
-            server_mode=False,
-            opt_queue=8,
-            combined=True,
-            rxq_txq=8,
-            iova_mode="pa",
-        )
-        for i in range(0, 5):
-            self.check_scp_file_valid_between_vms()
-            iperf_data_cbdma_enable_8_queue = (
-                self.start_iperf_and_verify_vhost_xstats_info(iperf_mode="tso")
-            )
-            ipef_result.append(
-                ["Enable_%d" % i, "mergeable path", 8, iperf_data_cbdma_enable_8_queue]
-            )
-            self.table_header = ["CBDMA Enable/Disable", "Mode", "rxq/txq", "Gbits/sec"]
-            self.result_table_create(self.table_header)
-        for table_row in ipef_result:
-            self.result_table_add(table_row)
-        self.result_table_print()
-
     def tear_down(self):
         """
         run after each test case.
         """
         self.stop_all_apps()
         self.dut.kill_all()
-        self.bind_cbdma_device_to_kernel()
 
     def tear_down_all(self):
         """
