diff --git a/test_dlopen_chain.py b/test_dlopen_chain.py
new file mode 100644
index 00000000..0660ef85
--- /dev/null
+++ b/test_dlopen_chain.py
@@ -0,0 +1,143 @@
+#!/usr/bin/env python3
+"""Test dlopen chain on BI-V100. Run on real machine."""
+import sys, os, importlib, ctypes
+
+def test_prebuilt_so():
+    """Test all 14 prebuilt corex .so can import from vllm package."""
+    try:
+        import vllm
+        vllm_root = os.path.dirname(vllm.__file__)
+    except ImportError:
+        print("[SKIP] vllm not installed, testing .so ELF headers only")
+        vllm_root = None
+    
+    modules = [
+        "corex_attn_head_rms_norm", "corex_block_major_kv_transfer",
+        "corex_fused_paged_prefill", "corex_gdn_beta_decay",
+        "corex_gdn_causal_conv", "corex_gdn_chunk_recurrent",
+        "corex_gdn_gated_norm", "corex_gdn_packed_decode",
+        "corex_gdn_qk_map", "corex_moe_direct_routed",
+        "corex_moe_exact_reduce", "corex_moe_topk_softmax",
+        "corex_moe_weight_gather", "corex_paged_kv_gather",
+    ]
+    
+    ok = fail = 0
+    for name in modules:
+        if vllm_root:
+            so_path = os.path.join(vllm_root, f"{name}.so")
+            if os.path.exists(so_path):
+                try:
+                    mod = importlib.import_module(f"vllm.{name}")
+                    funcs = [x for x in dir(mod) if not x.startswith('_')]
+                    print(f"  [OK] {name}: {funcs[:3]}")
+                    ok += 1
+                except Exception as e:
+                    print(f"  [FAIL] {name}: {e}")
+                    fail += 1
+            else:
+                print(f"  [MISS] {name}: not installed at {so_path}")
+                fail += 1
+        else:
+            # Just check prebuilt exists
+            prebuilt = f"qwen3_6_scripts/prebuilt/corex-3.2.3-ivcore10/{name}.so"
+            if os.path.exists(prebuilt):
+                print(f"  [FILE] {name}: {os.path.getsize(prebuilt)} bytes")
+                ok += 1
+            else:
+                print(f"  [MISS] {name}")
+                fail += 1
+    return ok, fail
+
+def test_ixformer():
+    """Test ixformer dispatch chain."""
+    checks = [
+        ("ixformer", None),
+        ("ixformer.functions", "vllm_single_query_cached_kv_attention"),
+        ("ixformer.contrib.vllm_flash_attn", "flash_attn_varlen_func"),
+    ]
+    ok = fail = 0
+    for mod_name, func_name in checks:
+        try:
+            mod = importlib.import_module(mod_name)
+            if func_name:
+                fn = getattr(mod, func_name, None)
+                if fn:
+                    print(f"  [OK] {mod_name}.{func_name}")
+                    ok += 1
+                else:
+                    avail = [x for x in dir(mod) if not x.startswith('_')]
+                    print(f"  [MISS] {mod_name}.{func_name} — available: {avail[:5]}")
+                    fail += 1
+            else:
+                print(f"  [OK] {mod_name} v{getattr(mod, '__version__', '?')}")
+                ok += 1
+        except ImportError as e:
+            print(f"  [FAIL] {mod_name}: {e}")
+            fail += 1
+    return ok, fail
+
+def test_base_so():
+    """Test base image .so availability."""
+    paths = [
+        "/usr/local/corex/lib64/libcorex_gdn.so",
+        "/usr/local/corex/lib64/libixattn.so",
+    ]
+    ok = fail = 0
+    for p in paths:
+        if os.path.exists(p):
+            try:
+                ctypes.CDLL(p, mode=ctypes.RTLD_LAZY)
+                print(f"  [OK] {p}")
+                ok += 1
+            except Exception as e:
+                print(f"  [FAIL] {p}: {e}")
+                fail += 1
+        else:
+            print(f"  [MISS] {p}")
+            fail += 1
+    return ok, fail
+
+def test_torch_cuda():
+    """Test basic CUDA/torch."""
+    try:
+        import torch
+        if torch.cuda.is_available():
+            name = torch.cuda.get_device_name(0)
+            mem = torch.cuda.get_device_properties(0).total_mem / 1e9
+            print(f"  [OK] {name}, {mem:.1f}GB")
+            t = torch.zeros(1024, device='cuda')
+            del t
+            print(f"  [OK] CUDA alloc/free works")
+            return 2, 0
+        else:
+            print(f"  [FAIL] CUDA not available")
+            return 0, 1
+    except Exception as e:
+        print(f"  [FAIL] {e}")
+        return 0, 1
+
+if __name__ == "__main__":
+    total_ok = total_fail = 0
+    
+    print("=== 1. Torch/CUDA ===")
+    ok, fail = test_torch_cuda()
+    total_ok += ok; total_fail += fail
+    
+    print("\n=== 2. Prebuilt CoreX .so (14 modules) ===")
+    ok, fail = test_prebuilt_so()
+    total_ok += ok; total_fail += fail
+    
+    print("\n=== 3. ixformer dispatch chain ===")
+    ok, fail = test_ixformer()
+    total_ok += ok; total_fail += fail
+    
+    print("\n=== 4. Base image .so ===")
+    ok, fail = test_base_so()
+    total_ok += ok; total_fail += fail
+    
+    print(f"\n{'='*50}")
+    print(f"OK: {total_ok}  FAIL: {total_fail}")
+    if total_fail == 0:
+        print("All dlopen chains verified.")
+    else:
+        print(f"WARNING: {total_fail} checks failed!")