test_basic_pfcwd_all_to_all

tests/pfcwd/test_basic_pfcwd_all_to_all.py

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+import time
+import datetime
+import pytest
+import logging
+
+from abstract_open_traffic_generator.result import FlowRequest
+from abstract_open_traffic_generator.control import *
+
+from tests.common.helpers.assertions import pytest_assert
+
+from tests.common.fixtures.conn_graph_facts import conn_graph_facts,\
+    fanout_graph_facts
+
+from tests.common.tgen.tgen_fixtures import api
+
+from files.configs.pfc_wd_basic import run_basic_pfcwd_all_to_all_test
+
+logger = logging.getLogger(__name__)
+lossless_prio_list = [3,4]
+
+
+@pytest.mark.parametrize('prio', lossless_prio_list)
+def test_basic_pfcwd_all_to_all(api,
+                                port_id,
+                                duthost,
+                                prio,
+                                conn_graph_facts,
+                                fanout_graph_facts):
+    """
+    +-----------------+           +--------------+           +-----------------+       
+    | Keysight Port 1 |------ et1 |   SONiC DUT  | et2 ------| Keysight Port 2 | 
+    +-----------------+           +--------------+           +-----------------+ 
+                                       et3
+                                        |
+                                        |
+                                        |
+                                +-----------------+
+                                | Keysight Port 3 |
+                                +-----------------+
+
+    Configuration:
+    1. Configure a single lossless priority value Pi (0 <= i <= 7).
+    2. Enable watchdog with default storm detection time (400ms) and restoration time (2sec).
+    3. On Keysight Chassis, create bi-directional traffic between Port 1 and Port 2
+       with DSCP value mapped to lossless priority Pi
+       a. Traffic 1->2
+       b. Traffic 2->1
+    4. Create bi-directional traffic between Port 2 and Port 3 with DSCP value mapped 
+       to lossless priority Pi
+       a. Traffic 2->3
+       b. Traffic 3->2
+    5. Create bi-directional traffic between Port 1 and Port 3 with DSCP value mapped 
+       to lossless priority Pi
+       a. Traffic 3->1
+       b. Traffic 1->3
+    6. Create PFC pause storm: Persistent PFC pause frames from Keysight port 3 to et3 of DUT.
+        Priority of the PFC pause frames should be same as that configured in DUT 
+        and the inter-frame transmission interval should be lesser than per-frame pause duration.
+
+    # Workflow
+    1. At time TstartTraffic , start all the bi-directional lossless traffic items.
+    2. At time TstartPause , start PFC pause storm.
+    3. At time TstopPause , stop PFC pause storm. (TstopPause - TstartPause) should be larger than
+        PFC storm detection time + PFC watchdog polling interval to trigger PFC watchdog.
+    4. At time TstopTraffic , stop lossless traffic items. Note that (TstopTraffic - TstopPause) should 
+        be larger than PFC storm restoration time to re-enable PFC.
+    5. Verify the following:
+        --> PFC watchdog is triggered on the corresponding lossless priorities at DUT interface et3.
+        --> 'Traffic 1->2' and 'Traffic 2->1' must not experience any packet loss in both directions. 
+            Its throughput should be close to 50% of the line rate.
+        --> For 'Traffic 2->3', 'Traffic 3->2', 'Traffic 1->3' and 'Traffic 3->1' between TstartPause and TstopPause , 
+            there should be almost 100% packet loss in both directions.
+        --> After TstopPause , the traffic throughput should gradually increase and become 50% of line rate in both directions.
+        --> There should not be any traffic loss after PFC storm restoration time has elapsed.
+
+    @param api: open tgen api fixture
+    @param port_id: starting index of port_id from topo file 
+    @param prio: dscp priority
+    @param duthost: Sonic DUT duthost fixture
+    @param conn_graph_facts: conn_graph_facts fixture to get testbed connection information
+    @param fanout_graph_facts: fanout_graph_facts fixture to get testbed connection information
+    """
+
+    run_basic_pfcwd_all_to_all_test(api=api,
+                                    port_id=port_id,
+                                    prio=prio,
+                                    duthost=duthost,
+                                    conn_graph_facts=conn_graph_facts,
+                                    fanout_graph_facts=fanout_graph_facts)