[CI] Nixl integration tests DP-EP (vllm-project#27199)

Signed-off-by: NickLucche <nlucches@redhat.com>
Signed-off-by: 0xrushi <6279035+0xrushi@users.noreply.github.com>

Author: NickLucche

tests/v1/kv_connector/nixl_integration/run_accuracy_test.sh

@@ -178,8 +178,16 @@ run_tests_for_model() {
     --port $PORT \
     --enforce-eager \
     --gpu-memory-utilization $GPU_MEMORY_UTILIZATION \
-    --tensor-parallel-size $DECODER_TP_SIZE \
     --kv-transfer-config '$KV_CONFIG'"
+  
+  # DP-EP attention mode
+  if [[ -z "$DP_EP" ]]; then
+    BASE_CMD="${BASE_CMD} --tensor-parallel-size $DECODER_TP_SIZE"
+  else
+    echo "DP-EP Attention enabled, deploying with dp=DECODER_TP_SIZE and tp=1"
+    BASE_CMD="${BASE_CMD} --data-parallel-size $DECODER_TP_SIZE \
+    --tensor-parallel-size 1 --enable-expert-parallel"
+  fi
 
     if [ -n "$model_args" ]; then
     FULL_CMD="$BASE_CMD $model_args"

tests/v1/kv_connector/nixl_integration/tp_config_sweep_accuracy_test.sh

@@ -10,6 +10,7 @@ configs=(
   "GPU_MEMORY_UTILIZATION=0.6 PREFILLER_TP_SIZE=1 DECODER_TP_SIZE=2"
   "GPU_MEMORY_UTILIZATION=0.8 MODEL_NAMES=deepseek-ai/deepseek-vl2-tiny" # MLA case
   "GPU_MEMORY_UTILIZATION=0.8 PREFILLER_TP_SIZE=1 DECODER_TP_SIZE=2 MODEL_NAMES=deepseek-ai/deepseek-vl2-tiny"
+  "DP_EP=1 GPU_MEMORY_UTILIZATION=0.8 PREFILLER_TP_SIZE=1 DECODER_TP_SIZE=2 MODEL_NAMES=deepseek-ai/deepseek-vl2-tiny" # MLA+P-TP1, D-DPEP=2 (TP=1) 
 )
 
 run_tests() {