|
| 1 | +import re |
| 2 | + |
| 3 | +from virttest import env_process, error_context, utils_misc, utils_net |
| 4 | + |
| 5 | + |
| 6 | +@error_context.context_aware |
| 7 | +def run(test, params, env): |
| 8 | + """ |
| 9 | + Simulate high packet rate between host and device by running Python scripts |
| 10 | + on both server and client side. This test is executed on two VM guests: |
| 11 | +
|
| 12 | + 1) Start a VM guest as the server. |
| 13 | + 2) Start a VM guest as the client. |
| 14 | + 3) Simulate buffer allocation issues on the server node. |
| 15 | + 4) Use a Python script to connect the client to the server. |
| 16 | + 5) Adjust the MinRxBufferPercent parameter to work around the issue. |
| 17 | + 6) Ensure no BSOD occurs on the client node. |
| 18 | +
|
| 19 | + :param test: QEMU test object. |
| 20 | + :param params: Dictionary of test parameters. |
| 21 | + :param env: Dictionary of test environment details. |
| 22 | + """ |
| 23 | + |
| 24 | + def analyze_ping_results(session, dest, count, timeout): |
| 25 | + """ |
| 26 | + Conduct a ping test to check the packet loss on slow memory buffer reallocation. |
| 27 | +
|
| 28 | + :param session: The session to execute the ping command. |
| 29 | + :param dest: Destination IP address to ping. |
| 30 | + :param count: Number of ICMP packets to send. |
| 31 | + :param timeout: Timeout for the ping command. |
| 32 | + """ |
| 33 | + status, output = utils_net.ping( |
| 34 | + dest=dest, session=session, count=count, timeout=timeout |
| 35 | + ) |
| 36 | + if status != 0: |
| 37 | + test.fail("Ping failed, status: %s, output: %s" % (status, output)) |
| 38 | + match = re.search(r"(\d+)% loss", output) |
| 39 | + return match and match.group(1) |
| 40 | + |
| 41 | + def modify_and_analyze_params_result(vm, param_name, value): |
| 42 | + """ |
| 43 | + Set netkvm driver parameter and verify if it was correctly set. |
| 44 | +
|
| 45 | + :param vm: Target VM. |
| 46 | + :param param_name: Parameter name to be modified. |
| 47 | + :param value: Value to set. |
| 48 | + """ |
| 49 | + utils_net.set_netkvm_param_value(vm, param_name, value) |
| 50 | + cur_value = utils_net.get_netkvm_param_value(vm, param_name) |
| 51 | + if cur_value != value: |
| 52 | + test.fail(f"Failed to set '{param_name}' to '{value}'") |
| 53 | + |
| 54 | + def check_and_restart_port(session, script_to_run): |
| 55 | + """ |
| 56 | + Check if a Python process is running. If not, restart the appropriate script. |
| 57 | +
|
| 58 | + :param session: The session to execute commands. |
| 59 | + :param script_to_run: The command to run the Python script. |
| 60 | + """ |
| 61 | + check_live_python = params.get("check_live_python") |
| 62 | + status, output = session.cmd_status_output(check_live_python, timeout=1200) |
| 63 | + if status == 0: |
| 64 | + return |
| 65 | + if "server" in script_to_run: |
| 66 | + s_session.cmd(dest_location) |
| 67 | + error_context.context("Run server script on the server node", test.log.info) |
| 68 | + status, output = session.cmd_status_output(server_cmd, timeout=1200) |
| 69 | + if status != 0: |
| 70 | + test.fail("The server node failed to start.") |
| 71 | + else: |
| 72 | + c_session.cmd(dest_location) |
| 73 | + error_context.context("Run client script on the client node", test.log.info) |
| 74 | + status, output = session.cmd_status_output( |
| 75 | + client_cmd % s_vm_ip, timeout=1200 |
| 76 | + ) |
| 77 | + if status != 0: |
| 78 | + test.fail("The client could not connect to the server node.") |
| 79 | + |
| 80 | + timeout = params.get_numeric("login_timeout", 360) |
| 81 | + param_name = params.get("param_name") |
| 82 | + param_values = params.get("param_values") |
| 83 | + dest_location = params.get("dest_location") |
| 84 | + copy_all_cmd = params.get("copy_all_cmd") |
| 85 | + pip_cmd = params.get("pip_cmd") |
| 86 | + server_cmd = params.get("server_cmd") |
| 87 | + client_cmd = params.get("client_cmd") |
| 88 | + |
| 89 | + s_vm_name = params["vms"].split()[0] |
| 90 | + s_vm = env.get_vm(s_vm_name) |
| 91 | + s_vm.verify_alive() |
| 92 | + s_session = s_vm.wait_for_serial_login(timeout=timeout) |
| 93 | + s_vm_ip = s_vm.get_address() |
| 94 | + |
| 95 | + c_vm_name = params["vms"].split(s_vm_name)[1].strip() |
| 96 | + c_vm_params = params.object_params(c_vm_name) |
| 97 | + c_vm_params["nic_extra_params_nic1"] = "" |
| 98 | + c_vm_params["start_vm"] = "yes" |
| 99 | + env_process.preprocess_vm(test, c_vm_params, env, c_vm_name) |
| 100 | + c_vm = env.get_vm(c_vm_name) |
| 101 | + c_vm.verify_alive() |
| 102 | + c_session = c_vm.wait_for_serial_login(timeout=timeout) |
| 103 | + c_vm_ip = c_vm.get_address() |
| 104 | + |
| 105 | + # Copy and install dependencies |
| 106 | + s_session.cmd(dest_location) |
| 107 | + copy_all_cmd = utils_misc.set_winutils_letter(s_session, copy_all_cmd) |
| 108 | + s_session.cmd(copy_all_cmd) |
| 109 | + |
| 110 | + c_session.cmd(dest_location) |
| 111 | + copy_all_cmd = utils_misc.set_winutils_letter(c_session, copy_all_cmd) |
| 112 | + c_session.cmd(copy_all_cmd) |
| 113 | + c_session.cmd(pip_cmd) |
| 114 | + |
| 115 | + # Run the packet loss simulation with different buffer settings |
| 116 | + ping_results = [] |
| 117 | + error_context.context( |
| 118 | + "Modify NIC parameters on the server and monitor packet loss", test.log.info |
| 119 | + ) |
| 120 | + for value in param_values.split(): |
| 121 | + modify_and_analyze_params_result(vm=s_vm, param_name=param_name, value=value) |
| 122 | + check_and_restart_port(session=s_session, script_to_run=server_cmd) |
| 123 | + check_and_restart_port(session=c_session, script_to_run=client_cmd) |
| 124 | + ping_loss = int( |
| 125 | + analyze_ping_results( |
| 126 | + session=c_session, dest=s_vm_ip, count=100, timeout=timeout |
| 127 | + ) |
| 128 | + ) |
| 129 | + ping_results.append(ping_loss) |
| 130 | + |
| 131 | + error_context.context("Analyze ping packet loss trend", test.log.info) |
| 132 | + if sum(ping_results) != 0: |
| 133 | + if not all( |
| 134 | + ping_results[i] > ping_results[i + 1] for i in range(len(ping_results) - 1) |
| 135 | + ): |
| 136 | + test.fail( |
| 137 | + "With parameter changes, packet loss should decrease progressively." |
| 138 | + ) |
| 139 | + |
| 140 | + # Final validation on client side (no BSOD) |
| 141 | + error_context.context("Verify no BSOD on the client node", test.log.info) |
| 142 | + for value in param_values.split(): |
| 143 | + modify_and_analyze_params_result(vm=c_vm, param_name=param_name, value=value) |
| 144 | + status, output = utils_net.ping( |
| 145 | + dest=c_vm_ip, session=c_session, count=10, timeout=60 |
| 146 | + ) |
| 147 | + if status != 0: |
| 148 | + test.fail("Ping failed, status: %s, output: %s" % (status, output)) |
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