[CI] Enable Crosslayer KV layout tests for ROCm platforms (#35416)

.buildkite/test-amd.yaml

@@ -1486,6 +1486,20 @@ steps:
     - uv pip install --system -r /vllm-workspace/requirements/kv_connectors_rocm.txt
     - DP_EP=1 ROCM_ATTN=1 bash v1/kv_connector/nixl_integration/config_sweep_accuracy_test.sh
 
+- label: CrossLayer KV layout Distributed NixlConnector PD accuracy tests (4 GPUs)
+  mirror_hardwares: [amdexperimental, amdproduction]
+  agent_pool: mi325_4
+  # grade: Blocking
+  timeout_in_minutes: 30
+  working_dir: "/vllm-workspace/tests"
+  num_devices: 4
+  source_file_dependencies:
+    - vllm/distributed/kv_transfer/kv_connector/v1/nixl_connector.py
+    - tests/v1/kv_connector/nixl_integration/
+  commands:
+    - uv pip install --system -r /vllm-workspace/requirements/kv_connectors_rocm.txt
+    - CROSS_LAYERS_BLOCKS=1 ROCM_ATTN=1 bash v1/kv_connector/nixl_integration/config_sweep_accuracy_test.sh
+
 ##### multi gpus test #####
 ##### A100 test #####
 
@@ -3136,6 +3150,20 @@ steps:
     - uv pip install --system -r /vllm-workspace/requirements/kv_connectors_rocm.txt
     - DP_EP=1 ROCM_ATTN=1 bash v1/kv_connector/nixl_integration/config_sweep_accuracy_test.sh
 
+- label: CrossLayer KV layout Distributed NixlConnector PD accuracy tests (4 GPUs)
+  mirror_hardwares: [amdexperimental, amdproduction]
+  agent_pool: mi355_4
+  # grade: Blocking
+  timeout_in_minutes: 30
+  working_dir: "/vllm-workspace/tests"
+  num_devices: 4
+  source_file_dependencies:
+    - vllm/distributed/kv_transfer/kv_connector/v1/nixl_connector.py
+    - tests/v1/kv_connector/nixl_integration/
+  commands:
+    - uv pip install --system -r /vllm-workspace/requirements/kv_connectors_rocm.txt
+    - CROSS_LAYERS_BLOCKS=1 ROCM_ATTN=1 bash v1/kv_connector/nixl_integration/config_sweep_accuracy_test.sh
+
 ##### multi gpus test #####
 ##### A100 test #####
 

tests/v1/kv_connector/nixl_integration/config_sweep_accuracy_test.sh

@@ -56,24 +56,27 @@ run_tests() {
   echo "✅ All ${label} tests passed!"
 }
 
-# Run tests
+# Set backend
+label="default backend"
+cmdline_args=""
 if [[ -n "${ROCM_ATTN:-}" ]]; then
   echo "ROCM_ATTN is set, running with --attention-backend ROCM_ATTN"
-  run_tests "ROCM_ATTN backend" "--attention-backend ROCM_ATTN"
-else
-  run_tests "default backend" ""
-fi
-
-# Check if FLASHINFER is set (non-empty)
-if [[ -n "${FLASHINFER:-}" ]]; then
-  echo "FLASHINFER is set, rerunning with --attention-backend FLASHINFER"
-  run_tests "FLASHINFER backend" "--attention-backend FLASHINFER"
+  label="ROCM_ATTN backend"
+  cmdline_args=" --attention-backend ROCM_ATTN "
+elif [[ -n "${FLASHINFER:-}" ]]; then
+  echo "FLASHINFER is set, running with --attention-backend FLASHINFER"
+  label="FLASHINFER backend"
+  cmdline_args=" --attention-backend FLASHINFER "
 else
-  echo "FLASHINFER not set, skipping FLASHINFER runs."
+  echo "running with default attention backend"
 fi
 
 # Check if cross-layers is enabled (non-empty)
 if [[ -n "${CROSS_LAYERS_BLOCKS:-}" ]]; then
-  echo "CROSS_LAYERS_BLOCKS is set, rerunning with --enable-cross-layers"
-  run_tests "default backend" "--enable-cross-layers"
+  echo "CROSS_LAYERS_BLOCKS is set, running with --enable-cross-layers"
+  label+=" - CROSS_LAYERS_BLOCKS enabled"
+  cmdline_args+=" --enable-cross-layers "
 fi
+
+# Run tests
+run_tests "${label}" "${cmdline_args}"