diff --git a/tests/TestSuite_vm2vm_virtio_net_perf_cbdma.py b/tests/TestSuite_vm2vm_virtio_net_perf_cbdma.py
new file mode 100644
index 00000000..a5994005
--- /dev/null
+++ b/tests/TestSuite_vm2vm_virtio_net_perf_cbdma.py
@@ -0,0 +1,744 @@
+# BSD LICENSE
+#
+# Copyright(c) <2022> Intel Corporation.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions
+# are met:
+#
+#   * Redistributions of source code must retain the above copyright
+#     notice, this list of conditions and the following disclaimer.
+#   * Redistributions in binary form must reproduce the above copyright
+#     notice, this list of conditions and the following disclaimer in
+#     the documentation and/or other materials provided with the
+#     distribution.
+#   * Neither the name of Intel Corporation nor the names of its
+#     contributors may be used to endorse or promote products derived
+#     from this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+"""
+DPDK Test suite.
+
+vm2vm split ring and packed ring with tx offload (TSO and UFO) with non-mergeable path.
+vm2vm split ring and packed ring with UFO about virtio-net device capability with non-mergeable path.
+vm2vm split ring and packed ring vhost-user/virtio-net check the payload of large packet is valid with
+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
+
+import framework.utils as utils
+from framework.pmd_output import PmdOutput
+from framework.test_case import TestCase
+from framework.virt_common import VM
+
+
+class TestVM2VMVirtioNetPerfCbdma(TestCase):
+    def set_up_all(self):
+        self.dut_ports = self.dut.get_ports()
+        self.ports_socket = self.dut.get_numa_id(self.dut_ports[0])
+        self.cores_list = self.dut.get_core_list(config="all", socket=self.ports_socket)
+        self.vhost_core_list = self.cores_list[0:9]
+        self.vm_num = 2
+        self.virtio_ip1 = "1.1.1.1"
+        self.virtio_ip2 = "1.1.1.2"
+        self.virtio_mac1 = "52:54:00:00:00:01"
+        self.virtio_mac2 = "52:54:00:00:00:02"
+        self.base_dir = self.dut.base_dir.replace('~', '/root')
+        self.random_string = string.ascii_letters + string.digits
+        socket_num = len(set([int(core['socket']) for core in self.dut.cores]))
+        self.socket_mem = ','.join(['2048']*socket_num)
+        self.vhost = self.dut.new_session(suite="vhost")
+        self.pmdout_vhost_user = PmdOutput(self.dut, self.vhost)
+        self.app_testpmd_path = self.dut.apps_name['test-pmd']
+
+    def set_up(self):
+        """
+        run before each test case.
+        """
+        self.dut.send_expect("rm -rf %s/vhost-net*" % self.base_dir, "#")
+        self.vm_dut = []
+        self.vm = []
+
+    def get_cbdma_ports_info_and_bind_to_dpdk(self, cbdma_num, allow_diff_socket=False):
+        """
+        get and bind cbdma ports into DPDK driver
+        """
+        self.all_cbdma_list = []
+        self.cbdma_list = []
+        self.cbdma_str = ""
+        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.all_cbdma_list.append(pci_info.group(1))
+                else:
+                    if self.ports_socket == cur_socket:
+                        self.all_cbdma_list.append(pci_info.group(1))
+        self.verify(len(self.all_cbdma_list) >= cbdma_num, 'There no enough cbdma device')
+        self.cbdma_list = self.all_cbdma_list[0:cbdma_num]
+        self.cbdma_str = ' '.join(self.cbdma_list)
+        self.dut.send_expect('./usertools/dpdk-devbind.py --force --bind=%s %s' % (self.drivername, self.cbdma_str), '# ', 60)
+
+    @staticmethod
+    def generate_dms_param(queues):
+        das_list = []
+        for i in range(queues):
+            das_list.append("txq{}".format(i))
+        das_param = "[{}]".format(";".join(das_list))
+        return das_param
+
+    @staticmethod
+    def generate_lcore_dma_param(cbdma_list, core_list):
+        group_num = int(len(cbdma_list) / len(core_list))
+        lcore_dma_list = []
+        if len(cbdma_list) == 1:
+            for core in core_list:
+                lcore_dma_list.append("lcore{}@{}".format(core, cbdma_list[0]))
+        elif len(core_list) == 1:
+            for cbdma in cbdma_list:
+                lcore_dma_list.append("lcore{}@{}".format(core_list[0], cbdma))
+        else:
+            for cbdma in cbdma_list:
+                core_list_index = int(cbdma_list.index(cbdma) / group_num)
+                lcore_dma_list.append("lcore{}@{}".format(core_list[core_list_index], cbdma))
+        lcore_dma_param = "[{}]".format(",".join(lcore_dma_list))
+        return lcore_dma_param
+
+    def bind_cbdma_device_to_kernel(self):
+        self.dut.send_expect('modprobe ioatdma', '# ')
+        self.dut.send_expect('./usertools/dpdk-devbind.py -u %s' % self.cbdma_str, '# ', 30)
+        self.dut.send_expect('./usertools/dpdk-devbind.py --force --bind=ioatdma  %s' % self.cbdma_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, cores, param="", eal_param="", ports = "", iova_mode=''):
+        if iova_mode:
+            eal_param += " --iova=" + iova_mode
+        self.pmdout_vhost_user.start_testpmd(cores=cores, param=param, eal_param=eal_param, ports=ports, prefix="vhost")
+        self.pmdout_vhost_user.execute_cmd('start')
+
+    def start_vms(self, server_mode=False, vm_queue=1, vm_config='vhost_sample'):
+        """
+        start two VM, each VM has one virtio device
+        """
+        for i in range(self.vm_num):
+            vm_dut = None
+            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'
+            vm_params['opt_queue'] = vm_queue
+            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)
+            try:
+                vm_dut = vm_info.start(set_target=False)
+                if vm_dut is None:
+                    raise Exception("Set up VM ENV failed")
+            except Exception as e:
+                print(utils.RED("Failure for %s" % str(e)))
+            self.verify(vm_dut is not None, "start vm failed")
+            self.vm_dut.append(vm_dut)
+            self.vm.append(vm_info)
+
+    def config_vm_ip(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']
+        self.vm_dut[0].send_expect("ifconfig %s %s" % (vm1_intf, self.virtio_ip1), "#", 10)
+        self.vm_dut[1].send_expect("ifconfig %s %s" % (vm2_intf, self.virtio_ip2), "#", 10)
+        self.vm_dut[0].send_expect("arp -s %s %s" % (self.virtio_ip2, self.virtio_mac2), "#", 10)
+        self.vm_dut[1].send_expect("arp -s %s %s" % (self.virtio_ip1, self.virtio_mac1), "#", 10)
+
+    def config_vm_combined(self, combined=1):
+        """
+        set virtio device combined
+        """
+        vm1_intf = self.vm_dut[0].ports_info[0]['intf']
+        vm2_intf = self.vm_dut[1].ports_info[0]['intf']
+        self.vm_dut[0].send_expect("ethtool -L %s combined %d" % (vm1_intf, combined), "#", 10)
+        self.vm_dut[1].send_expect("ethtool -L %s combined %d" % (vm2_intf, combined), "#", 10)
+
+    def check_ping_between_vms(self):
+        ping_out = self.vm_dut[0].send_expect("ping {} -c 4".format(self.virtio_ip2), "#" , 20)
+        self.logger.info(ping_out)
+
+    def start_iperf(self):
+        """
+        run perf command between to vms
+        """
+        self.vhost.send_expect("clear port xstats all", "testpmd> ", 10)
+
+        server = "iperf -s -i 1"
+        client = "iperf -c {} -i 1 -t 60".format(self.virtio_ip1)
+        self.vm_dut[0].send_expect("{} > iperf_server.log &".format(server), "", 10)
+        self.vm_dut[1].send_expect("{} > iperf_client.log &".format(client), "", 10)
+        time.sleep(60)
+
+    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.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)
+
+    def verify_xstats_info_on_vhost(self):
+        """
+        check both 2VMs can receive and send big packets to each other
+        """
+        self.vhost.send_expect("show port stats all", "testpmd> ", 20)
+        out_tx = self.vhost.send_expect("show port xstats 0", "testpmd> ", 20)
+        out_rx = self.vhost.send_expect("show port xstats 1", "testpmd> ", 20)
+
+        tx_info = re.search("tx_size_1523_to_max_packets:\s*(\d*)", out_tx)
+        rx_info = re.search("rx_size_1523_to_max_packets:\s*(\d*)", out_rx)
+
+        self.verify(int(rx_info.group(1)) > 0,
+                    "Port 1 not receive packet greater than 1522")
+        self.verify(int(tx_info.group(1)) > 0,
+                    "Port 0 not forward packet greater than 1522")
+
+    def offload_capbility_check(self, vm_client):
+        """
+        check UFO and TSO offload status on for the Virtio-net driver in VM
+        """
+        vm_intf = vm_client.ports_info[0]['intf']
+        vm_client.send_expect('ethtool -k %s > offload.log' % vm_intf, '#', 10)
+        fmsg = vm_client.send_expect("cat ./offload.log", "#")
+        udp_info = re.search("udp-fragmentation-offload:\s*(\S*)", fmsg)
+        tcp_info = re.search("tx-tcp-segmentation:\s*(\S*)", fmsg)
+        tcp_enc_info = re.search("tx-tcp-ecn-segmentation:\s*(\S*)", fmsg)
+        tcp6_info = re.search("tx-tcp6-segmentation:\s*(\S*)", fmsg)
+
+        self.verify(udp_info is not None and udp_info.group(1) == "on",
+                    "the udp-fragmentation-offload in vm not right")
+        self.verify(tcp_info is not None and tcp_info.group(1) == "on",
+                    "tx-tcp-segmentation in vm not right")
+        self.verify(tcp_enc_info is not None and tcp_enc_info.group(1) == "on",
+                    "tx-tcp-ecn-segmentation in vm not right")
+        self.verify(tcp6_info is not None and tcp6_info.group(1) == "on",
+                    "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_and_cbdma_enable(self):
+        """
+        Test Case 1: VM2VM split ring vhost-user/virtio-net CBDMA enable test with tcp traffic
+        """
+        self.get_cbdma_ports_info_and_bind_to_dpdk(2)
+        dmas = self.generate_dms_param(1)
+        lcore_dma = self.generate_lcore_dma_param(cbdma_list=self.cbdma_list, core_list=self.vhost_core_list[1:3])
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,queues=1,dmas={},dma_ring_size=2048'".format(dmas) + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,queues=1,dmas={},dma_ring_size=2048'".format(dmas)
+        param = " --nb-cores=2 --txd=1024 --rxd=1024 --txq=1 --rxq=1" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param, iova_mode='va')
+        self.vm_args = "disable-modern=false,mrg_rxbuf=on,csum=on,guest_csum=on,host_tso4=on,guest_tso4=on,guest_ecn=on"
+        self.start_vms(server_mode=False, vm_queue=1)
+        self.config_vm_ip()
+        self.check_ping_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+        self.verify_xstats_info_on_vhost()
+
+    def test_vm2vm_split_ring_with_mergeable_path_8queue_check_large_packet_and_cbdma_enable(self):
+        """
+        Test Case 2: VM2VM split ring vhost-user/virtio-net mergeable 8 queues CBDMA enable test with large packet payload valid check
+        """
+        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=16, allow_diff_socket=True)
+        dmas = self.generate_dms_param(8)
+        core1 = self.vhost_core_list[1]
+        core2 = self.vhost_core_list[2]
+        core3 = self.vhost_core_list[3]
+        core4 = self.vhost_core_list[4]
+        cbdma1 = self.cbdma_list[0]
+        cbdma2 = self.cbdma_list[1]
+        cbdma3 = self.cbdma_list[2]
+        cbdma4 = self.cbdma_list[3]
+        cbdma5 = self.cbdma_list[4]
+        cbdma6 = self.cbdma_list[5]
+        cbdma7 = self.cbdma_list[6]
+        cbdma8 = self.cbdma_list[7]
+        cbdma9 = self.cbdma_list[8]
+        cbdma10 = self.cbdma_list[9]
+        cbdma11 = self.cbdma_list[10]
+        cbdma12 = self.cbdma_list[11]
+        cbdma13 = self.cbdma_list[12]
+        cbdma14 = self.cbdma_list[13]
+        cbdma15 = self.cbdma_list[14]
+        cbdma16 = self.cbdma_list[15]
+        lcore_dma = f"[lcore{core1}@{cbdma1},lcore{core1}@{cbdma2},lcore{core1}@{cbdma3}," \
+            f"lcore{core1}@{cbdma4},lcore{core1}@{cbdma5},lcore{core1}@{cbdma6}," \
+            f"lcore{core2}@{cbdma7},lcore{core2}@{cbdma8}," \
+            f"lcore{core3}@{cbdma9},lcore{core3}@{cbdma10},lcore{core3}@{cbdma11},lcore{core3}@{cbdma12}," \
+            f"lcore{core3}@{cbdma13},lcore{core3}@{cbdma14},lcore{core3}@{cbdma15}," \
+            f"lcore{core4}@{cbdma16}]"
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8,dmas={}'".format(dmas) + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas={}'".format(dmas)
+        param = " --nb-cores=4 --txd=1024 --rxd=1024 --txq=8 --rxq=8" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param, iova_mode='va')
+        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.start_vms(server_mode=True, vm_queue=8)
+        self.config_vm_ip()
+        self.config_vm_combined(combined=8)
+        self.check_ping_between_vms()
+        self.check_scp_file_valid_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+
+        self.logger.info("Quit and relaunch vhost w/ diff CBDMA channels")
+        self.pmdout_vhost_user.execute_cmd("quit", "#")
+        lcore_dma = f"[lcore{core1}@{cbdma1},lcore{core1}@{cbdma2}," \
+            f"lcore{core1}@{cbdma3},lcore{core1}@{cbdma4}," \
+            f"lcore{core2}@{cbdma1},lcore{core2}@{cbdma3},lcore{core2}@{cbdma5}," \
+            f"lcore{core2}@{cbdma6},lcore{core2}@{cbdma7},lcore{core2}@{cbdma8}," \
+            f"lcore{core3}@{cbdma2},lcore{core3}@{cbdma4},lcore{core3}@{cbdma9}," \
+            f"lcore{core3}@{cbdma10},lcore{core3}@{cbdma11},lcore{core3}@{cbdma12}," \
+            f"lcore{core3}@{cbdma13},lcore{core3}@{cbdma14},lcore{core3}@{cbdma15}," \
+            f"lcore{core4}@{cbdma16}]"
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6]'" + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq1;txq2;txq3;txq4;txq5;txq6;txq7]'"
+        param = " --nb-cores=4 --txd=1024 --rxd=1024 --txq=8 --rxq=8" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param, iova_mode='va')
+        self.check_ping_between_vms()
+        self.check_scp_file_valid_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+
+        if not self.check_2M_env:
+            self.logger.info("Quit and relaunch vhost w/ iova=pa")
+            eal_param = "--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6]'" + \
+                        " --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6]'"
+            param = " --nb-cores=4 --txd=1024 --rxd=1024 --txq=8 --rxq=8" + " --lcore-dma={}".format(lcore_dma)
+            self.pmdout_vhost_user.execute_cmd("quit", "#")
+            self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param, iova_mode="pa")
+            self.check_ping_between_vms()
+            self.check_scp_file_valid_between_vms()
+            self.start_iperf()
+            self.get_perf_result()
+
+        self.logger.info("Quit and relaunch vhost w/o CBDMA channels")
+        self.pmdout_vhost_user.execute_cmd("quit", "#")
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=4'" + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=4'"
+        param = " --nb-cores=4 --txd=1024 --rxd=1024 --txq=4 --rxq=4"
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param)
+        self.config_vm_combined(combined=4)
+        self.check_ping_between_vms()
+        self.check_scp_file_valid_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+
+        self.logger.info("Quit and relaunch vhost w/o CBDMA channels with 1 queue")
+        self.pmdout_vhost_user.execute_cmd("quit", "#")
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=4'" + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=4'"
+        param = " --nb-cores=4 --txd=1024 --rxd=1024 --rxq=1 --txq=1"
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param)
+        self.config_vm_combined(combined=1)
+        self.check_scp_file_valid_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+
+    def test_vm2vm_split_ring_with_non_mergeable_path_8queue_check_large_packet_and_cbdma_enable(self):
+        """
+        Test Case 3: VM2VM split ring vhost-user/virtio-net non-mergeable 8 queues CBDMA enable test with large packet payload valid check
+        """
+        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=16, allow_diff_socket=True)
+        dmas = self.generate_dms_param(8)
+        core1 = self.vhost_core_list[1]
+        core2 = self.vhost_core_list[2]
+        core3 = self.vhost_core_list[3]
+        core4 = self.vhost_core_list[4]
+        cbdma1 = self.cbdma_list[0]
+        cbdma2 = self.cbdma_list[1]
+        cbdma3 = self.cbdma_list[2]
+        cbdma4 = self.cbdma_list[3]
+        cbdma5 = self.cbdma_list[4]
+        cbdma6 = self.cbdma_list[5]
+        cbdma7 = self.cbdma_list[6]
+        cbdma8 = self.cbdma_list[7]
+        cbdma9 = self.cbdma_list[8]
+        cbdma10 = self.cbdma_list[9]
+        cbdma11 = self.cbdma_list[10]
+        cbdma12 = self.cbdma_list[11]
+        cbdma13 = self.cbdma_list[12]
+        cbdma14 = self.cbdma_list[13]
+        cbdma15 = self.cbdma_list[14]
+        cbdma16 = self.cbdma_list[15]
+        lcore_dma = f"[lcore{core1}@{cbdma1},lcore{core1}@{cbdma2},lcore{core1}@{cbdma3}," \
+            f"lcore{core1}@{cbdma4},lcore{core1}@{cbdma5},lcore{core1}@{cbdma6}," \
+            f"lcore{core2}@{cbdma7},lcore{core2}@{cbdma8}," \
+            f"lcore{core3}@{cbdma9},lcore{core3}@{cbdma10},lcore{core3}@{cbdma11},lcore{core3}@{cbdma12}," \
+            f"lcore{core3}@{cbdma13},lcore{core3}@{cbdma14},lcore{core3}@{cbdma15}," \
+            f"lcore{core4}@{cbdma16}]"
+
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8,dmas={}'".format(dmas) + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas={}'".format(dmas)
+        param = " --nb-cores=4 --txd=1024 --rxd=1024 --txq=8 --rxq=8" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param, iova_mode='va')
+        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.start_vms(server_mode=True, vm_queue=8)
+        self.config_vm_ip()
+        self.config_vm_combined(combined=8)
+        self.check_ping_between_vms()
+        self.check_scp_file_valid_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+
+        self.logger.info("Quit and relaunch vhost w/ diff CBDMA channels")
+        self.pmdout_vhost_user.execute_cmd("quit", "#")
+        lcore_dma = f"[lcore{core1}@{cbdma1},lcore{core1}@{cbdma2}," \
+            f"lcore{core1}@{cbdma3},lcore{core1}@{cbdma4}," \
+            f"lcore{core2}@{cbdma1},lcore{core2}@{cbdma3},lcore{core2}@{cbdma5}," \
+            f"lcore{core2}@{cbdma6},lcore{core2}@{cbdma7},lcore{core2}@{cbdma8}," \
+            f"lcore{core3}@{cbdma2},lcore{core3}@{cbdma4},lcore{core3}@{cbdma9}," \
+            f"lcore{core3}@{cbdma10},lcore{core3}@{cbdma11},lcore{core3}@{cbdma12}," \
+            f"lcore{core3}@{cbdma13},lcore{core3}@{cbdma14},lcore{core3}@{cbdma15}," \
+            f"lcore{core4}@{cbdma16}]"
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8,dmas=[txq0;txq1;txq2;txq3;txq4;txq5;txq6]'" + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8,dmas=[txq1;txq2;txq3;txq4;txq5;txq6]'"
+        param = " --nb-cores=4 --txd=1024 --rxd=1024 --txq=8 --rxq=8" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param, iova_mode='va')
+        self.check_scp_file_valid_between_vms()
+        self.check_ping_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+
+        self.logger.info("Quit and relaunch vhost w/o CBDMA channels")
+        self.pmdout_vhost_user.execute_cmd("quit", "#")
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8'" + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8'"
+        param = " --nb-cores=4 --txd=1024 --rxd=1024 --txq=8 --rxq=8"
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param, iova_mode='va')
+        self.config_vm_combined(combined=4)
+        self.check_ping_between_vms()
+        self.check_scp_file_valid_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+
+        self.logger.info("Quit and relaunch vhost w/o CBDMA channels with 1 queue")
+        self.pmdout_vhost_user.execute_cmd("quit", "#")
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=8'" + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=8'"
+        param = " --nb-cores=4 --txd=1024 --rxd=1024 --txq=1 --rxq=1"
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param)
+        self.config_vm_combined(combined=1)
+        self.check_ping_between_vms()
+        self.check_scp_file_valid_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+
+    def test_vm2vm_split_ring_with_mergeable_path_16queue_check_large_packet_and_cbdma_enable(self):
+        """
+        Test Case 4: VM2VM split ring vhost-user/virtio-net mergeable 16 queues CBDMA enable test with large packet payload valid check
+        """
+        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=16, allow_diff_socket=True)
+        dmas = self.generate_dms_param(16)
+        lcore_dma =  self.generate_lcore_dma_param(cbdma_list=self.cbdma_list, core_list=self.vhost_core_list[1:9])
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,client=1,queues=16,dmas={}'".format(dmas) + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,client=1,queues=16,dmas={}'".format(dmas)
+        param = " --nb-cores=8 --txd=1024 --rxd=1024 --txq=16 --rxq=16" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param, iova_mode='va')
+        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.start_vms(server_mode=True, vm_queue=16)
+        self.config_vm_ip()
+        self.config_vm_combined(combined=16)
+        self.check_ping_between_vms()
+        self.check_scp_file_valid_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+
+    def test_vm2vm_packed_ring_iperf_with_tso_and_cbdma_enable(self):
+        """
+        Test Case 5: VM2VM packed ring vhost-user/virtio-net CBDMA enable test with tcp traffic
+        """
+        self.get_cbdma_ports_info_and_bind_to_dpdk(2)
+        dmas = self.generate_dms_param(1)
+        lcore_dma = self.generate_lcore_dma_param(cbdma_list=self.cbdma_list, core_list=self.vhost_core_list[1:3])
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,queues=1,dmas={}'".format(dmas) + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,queues=1,dmas={}'".format(dmas)
+        param = " --nb-cores=2 --txd=1024 --rxd=1024 --txq=1 --rxq=1" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param, iova_mode='va')
+        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_vms(server_mode=False, vm_queue=1)
+        self.config_vm_ip()
+        self.check_ping_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+        self.verify_xstats_info_on_vhost()
+
+    def test_vm2vm_packed_ring_with_mergeable_path_8queue_check_large_packet_and_cbdma_enable(self):
+        """
+        Test Case 6: VM2VM virtio-net packed ring mergeable 8 queues CBDMA enable test with large packet payload valid check
+        """
+        self.get_cbdma_ports_info_and_bind_to_dpdk(16, allow_diff_socket=True)
+        dmas = self.generate_dms_param(7)
+        core1 = self.vhost_core_list[1]
+        core2 = self.vhost_core_list[2]
+        core3 = self.vhost_core_list[3]
+        core4 = self.vhost_core_list[4]
+        cbdma1 = self.cbdma_list[0]
+        cbdma2 = self.cbdma_list[1]
+        cbdma3 = self.cbdma_list[2]
+        cbdma4 = self.cbdma_list[3]
+        cbdma5 = self.cbdma_list[4]
+        cbdma6 = self.cbdma_list[5]
+        cbdma7 = self.cbdma_list[6]
+        cbdma8 = self.cbdma_list[7]
+        cbdma9 = self.cbdma_list[8]
+        cbdma10 = self.cbdma_list[9]
+        cbdma11 = self.cbdma_list[10]
+        cbdma12 = self.cbdma_list[11]
+        cbdma13 = self.cbdma_list[12]
+        cbdma14 = self.cbdma_list[13]
+        cbdma15 = self.cbdma_list[14]
+        cbdma16 = self.cbdma_list[15]
+        lcore_dma = f"[lcore{core1}@{cbdma1},lcore{core1}@{cbdma2},lcore{core1}@{cbdma3},lcore{core1}@{cbdma4}," \
+            f"lcore{core2}@{cbdma1},lcore{core2}@{cbdma3},lcore{core2}@{cbdma5},lcore{core2}@{cbdma6},lcore{core2}@{cbdma7},lcore{core2}@{cbdma8}," \
+            f"lcore{core3}@{cbdma2},lcore{core3}@{cbdma4},lcore{core3}@{cbdma9},lcore{core3}@{cbdma10},lcore{core3}@{cbdma11},lcore{core3}@{cbdma12},lcore{core3}@{cbdma13},lcore{core3}@{cbdma14},lcore{core3}@{cbdma15}," \
+            f"lcore{core4}@{cbdma16}]"
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,queues=8,dmas={}'".format(dmas) + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,queues=8,dmas={}'".format(dmas)
+        param = " --nb-cores=4 --txd=1024 --rxd=1024 --txq=8 --rxq=8" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param, iova_mode='va')
+        # 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.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.start_vms(server_mode=False, vm_queue=8)
+        self.config_vm_ip()
+        self.check_ping_between_vms()
+        self.config_vm_combined(combined=8)
+        for _ in range(6):
+            self.check_scp_file_valid_between_vms()
+            self.start_iperf()
+            self.get_perf_result()
+
+    def test_vm2vm_packed_ring_with_non_mergeable_path_8queue_check_large_packet_and_cbdma_enable(self):
+        """
+        Test Case 7: VM2VM virtio-net packed ring non-mergeable 8 queues CBDMA enable test with large packet payload valid check
+        """
+        self.get_cbdma_ports_info_and_bind_to_dpdk(16, allow_diff_socket=True)
+        dmas = self.generate_dms_param(8)
+        core1 = self.vhost_core_list[1]
+        core2 = self.vhost_core_list[2]
+        core3 = self.vhost_core_list[3]
+        core4 = self.vhost_core_list[4]
+        cbdma1 = self.cbdma_list[0]
+        cbdma2 = self.cbdma_list[1]
+        cbdma3 = self.cbdma_list[2]
+        cbdma4 = self.cbdma_list[3]
+        cbdma5 = self.cbdma_list[4]
+        cbdma6 = self.cbdma_list[5]
+        cbdma7 = self.cbdma_list[6]
+        cbdma8 = self.cbdma_list[7]
+        cbdma9 = self.cbdma_list[8]
+        cbdma10 = self.cbdma_list[9]
+        cbdma11 = self.cbdma_list[10]
+        cbdma12 = self.cbdma_list[11]
+        cbdma13 = self.cbdma_list[12]
+        cbdma14 = self.cbdma_list[13]
+        cbdma15 = self.cbdma_list[14]
+        cbdma16 = self.cbdma_list[15]
+        lcore_dma = f"[lcore{core1}@{cbdma1},lcore{core1}@{cbdma2},lcore{core1}@{cbdma3}," \
+            f"lcore{core1}@{cbdma4},lcore{core1}@{cbdma5},lcore{core1}@{cbdma6}," \
+            f"lcore{core2}@{cbdma7},lcore{core2}@{cbdma8}," \
+            f"lcore{core3}@{cbdma9},lcore{core3}@{cbdma10},lcore{core3}@{cbdma11},lcore{core3}@{cbdma12}," \
+            f"lcore{core3}@{cbdma13},lcore{core3}@{cbdma14},lcore{core3}@{cbdma15}," \
+            f"lcore{core4}@{cbdma16}]"
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,queues=8,dmas={}'".format(dmas) + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,queues=8,dmas={}'".format(dmas)
+        param = " --nb-cores=4 --txd=1024 --rxd=1024 --txq=8 --rxq=8" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param,
+                                 iova_mode='va')
+        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.start_vms(server_mode=False, vm_queue=8)
+        self.config_vm_ip()
+        self.config_vm_combined(combined=8)
+        self.check_ping_between_vms()
+        for _ in range(6):
+            self.check_scp_file_valid_between_vms()
+            self.start_iperf()
+            self.get_perf_result()
+
+    def test_vm2vm_packed_ring_with_mergeable_path_16queue_check_large_packet_and_cbdma_enable(self):
+        """
+        Test Case 8: VM2VM virtio-net packed ring mergeable 16 queues CBDMA enabled test with large packet payload valid check
+        """
+        self.get_cbdma_ports_info_and_bind_to_dpdk(16, allow_diff_socket=True)
+        dmas = self.generate_dms_param(16)
+        lcore_dma = self.generate_lcore_dma_param(cbdma_list=self.cbdma_list, core_list=self.vhost_core_list[1:9])
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,queues=16,dmas={}'".format(dmas) + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,queues=16,dmas={}'".format(dmas)
+        param = " --nb-cores=8 --txd=1024 --rxd=1024 --txq=16 --rxq=16" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param,
+                                 iova_mode='va')
+        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.start_vms(server_mode=False, vm_queue=16)
+        self.config_vm_ip()
+        self.config_vm_combined(combined=16)
+        self.check_ping_between_vms()
+        for _ in range(6):
+            self.check_scp_file_valid_between_vms()
+            self.start_iperf()
+            self.get_perf_result()
+
+    def test_vm2vm_packed_ring_iperf_with_tso_when_set_ivoa_pa_and_cbdma_enable(self):
+        """
+        Test Case 9: VM2VM packed ring vhost-user/virtio-net CBDMA enable test with tcp traffic when set iova=pa
+        """
+        self.get_cbdma_ports_info_and_bind_to_dpdk(2)
+        dmas = self.generate_dms_param(1)
+        lcore_dma = self.generate_lcore_dma_param(cbdma_list=self.cbdma_list, core_list=self.vhost_core_list[1:3])
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,queues=1,dmas={}'".format(dmas) + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,queues=1,dmas={}'".format(dmas)
+        param = " --nb-cores=2 --txd=1024 --rxd=1024 --txq=1 --rxq=1" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param,
+                                 iova_mode='pa')
+        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_vms(server_mode=False, vm_queue=1)
+        self.config_vm_ip()
+        self.check_ping_between_vms()
+        self.check_scp_file_valid_between_vms()
+        self.start_iperf()
+        self.get_perf_result()
+        self.verify_xstats_info_on_vhost()
+
+    def test_vm2vm_packed_ring_with_mergeable_path_8queue_check_large_packet_when_set_ivoa_pa_and_cbdma_enable(self):
+        """
+        Test Case 10: VM2VM virtio-net packed ring mergeable 8 queues CBDMA enable and PA mode test with large packet payload valid check
+        """
+        self.get_cbdma_ports_info_and_bind_to_dpdk(cbdma_num=16, allow_diff_socket=True)
+        dmas = self.generate_dms_param(7)
+        core1 = self.vhost_core_list[1]
+        core2 = self.vhost_core_list[2]
+        core3 = self.vhost_core_list[3]
+        core4 = self.vhost_core_list[4]
+        cbdma1 = self.cbdma_list[0]
+        cbdma2 = self.cbdma_list[1]
+        cbdma3 = self.cbdma_list[2]
+        cbdma4 = self.cbdma_list[3]
+        cbdma5 = self.cbdma_list[4]
+        cbdma6 = self.cbdma_list[5]
+        cbdma7 = self.cbdma_list[6]
+        cbdma8 = self.cbdma_list[7]
+        cbdma9 = self.cbdma_list[8]
+        cbdma10 = self.cbdma_list[9]
+        cbdma11 = self.cbdma_list[10]
+        cbdma12 = self.cbdma_list[11]
+        cbdma13 = self.cbdma_list[12]
+        cbdma14 = self.cbdma_list[13]
+        cbdma15 = self.cbdma_list[14]
+        cbdma16 = self.cbdma_list[15]
+        lcore_dma = f"[lcore{core1}@{cbdma1},lcore{core1}@{cbdma2},lcore{core1}@{cbdma3}," \
+            f"lcore{core1}@{cbdma4},lcore{core1}@{cbdma5},lcore{core1}@{cbdma6}," \
+            f"lcore{core2}@{cbdma7},lcore{core2}@{cbdma8}," \
+            f"lcore{core3}@{cbdma9},lcore{core3}@{cbdma10},lcore{core3}@{cbdma11},lcore{core3}@{cbdma12}," \
+            f"lcore{core3}@{cbdma13},lcore{core3}@{cbdma14},lcore{core3}@{cbdma15}," \
+            f"lcore{core4}@{cbdma16}]"
+        eal_param = "--vdev 'net_vhost0,iface=vhost-net0,queues=8,dmas={}'".format(dmas) + \
+                    " --vdev 'net_vhost1,iface=vhost-net1,queues=8,dmas={}'".format(dmas)
+        param = " --nb-cores=4 --txd=1024 --rxd=1024 --txq=8 --rxq=8" + " --lcore-dma={}".format(lcore_dma)
+        self.start_vhost_testpmd(cores=self.vhost_core_list, ports=self.cbdma_list, eal_param=eal_param, param=param,
+                                 iova_mode='pa')
+        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.start_vms(server_mode=False, vm_queue=8)
+        self.config_vm_ip()
+        self.check_ping_between_vms()
+        for _ in range(1):
+            self.check_scp_file_valid_between_vms()
+            self.start_iperf()
+            self.get_perf_result()
+
+    def stop_all_apps(self):
+        for i in range(len(self.vm)):
+            self.vm[i].stop()
+        self.pmdout_vhost_user.quit()
+
+    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):
+        """
+        Run after each test suite.
+        """
+        self.dut.close_session(self.vhost)
