[fix] fix bug in 1p1d disaggregated_prefill example (#1184)

### What this PR does / why we need it?
fix  bug in 1p1d  disaggregated_prefill  example

### Does this PR introduce _any_ user-facing change?

No.

### How was this patch tested?

Tested with python find_device_ips.py and run disaggregated_prefill
example

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Signed-off-by: wangyanhui-cmss <wangyanhui_yewu@cmss.chinamobile.com>

examples/disaggregated_prefill/find_device_ips.py

@@ -30,38 +30,40 @@ import vllm_ascend.envs as envs
 HCCN_TOOL_PATH = envs.HCCN_PATH
 
 
-def get_device_ips(world_size: int):
-    npu_info = subprocess.run(
-        ["npu-smi", "info", "-m"],
-        stdout=subprocess.PIPE,
-        stderr=subprocess.PIPE,
-        universal_newlines=True,
-    )
+def get_device_ips():
+    npu_info = subprocess.run(['npu-smi', 'info', '-m'],
+                              stdout=subprocess.PIPE,
+                              stderr=subprocess.PIPE,
+                              universal_newlines=True)
     if npu_info.returncode != 0 or not os.path.exists(HCCN_TOOL_PATH):
         raise RuntimeError("No npu-smi/hccn_tool tools provided for NPU.")
-    npu_start_idx = int(
-        re.match(r".*\n\t([0-9]+).*",
-                 npu_info.stdout).group(1))  # type: ignore
+
+    # ‌Extract NPU IDs for all Ascend devices (excluding Mcu rows)
+    device_ids = []
+    for line in npu_info.stdout.strip().split('\n'):
+        match = re.match(r'^\s*(\d+)\s+\d+\s+\d+\s+Ascend', line)
+        if match:
+            device_ids.append(int(match.group(1)))
+
+    if not device_ids:
+        raise RuntimeError(
+            "Cannot parse any valid device ID from npu-smi output.")
+
     device_ip_list = []
-    for ip_offset in range(world_size):
-        cmd = [
-            HCCN_TOOL_PATH,
-            "-i",
-            f"{npu_start_idx + ip_offset}",
-            "-ip",
-            "-g",
-        ]
-        device_ip_info = subprocess.run(
-            cmd,
-            stdout=subprocess.PIPE,
-            stderr=subprocess.PIPE,
-            universal_newlines=True,
-        )
-        device_ip = re.match(r"ipaddr:(.*)\n",
-                             device_ip_info.stdout).group(1)  # type: ignore
+    for device_id in device_ids:
+        cmd = [HCCN_TOOL_PATH, '-i', str(device_id), '-ip', '-g']
+        device_ip_info = subprocess.run(cmd,
+                                        stdout=subprocess.PIPE,
+                                        stderr=subprocess.PIPE,
+                                        universal_newlines=True)
+        ip_match = re.search(r'ipaddr:(.*)', device_ip_info.stdout)
+        if not ip_match:
+            raise RuntimeError(
+                f"Cannot parse IP from hccn_tool for device {device_id}")
+        device_ip = ip_match.group(1).strip()
         device_ip_list.append(device_ip)
+
     return device_ip_list
 
 
-# Pass number of NPUs into this function.
-print(get_device_ips(8))
+print(get_device_ips())