refactor(bridge): rewrite ix_full_bridge.cpp for actual base image symbols
Symbol probe revealed ixformer::infer namespace does NOT exist in base image.
That namespace is xllm's own compiled wrapper layer.
Actual available symbols in base image:
_ixformer_torch.so: silu_and_mul_forward, rms_norm_forward,
fused_add_rms_norm_forward, ixformer_linear, ixformer_linear_ex
libixformer.so: ixinfer_flash_attn_unpad_fwd (different signature)
MoE functions (topk_softmax, group_gemm, moe_expand_input, etc.)
are NOT in any base image .so — MoE must use Python path.
Bridge now only wraps: silu_and_mul, rms_norm, fused_add_rms_norm, linear
These accelerate the per-layer ops that run 200x per token.
This commit is contained in:
project6-dev
@@ -1,39 +1,23 @@
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#!/usr/bin/env python3
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"""
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verify_single_gpu.py — 单卡 BI-V100 验证 ix_full_bridge + MoE dispatch chain
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verify_single_gpu.py — Single-card BI-V100 verification
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用法: python3 verify_single_gpu.py
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要求: 在真机 Docker 里运行，单卡即可
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测试链条:
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Step 0: JIT 编译 ix_full_bridge.cpp → .so
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Step 1: ixformer::infer::topk_softmax
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Step 2: ixformer::infer::moe_compute_token_index_api (gen_idx)
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Step 3: ixformer::infer::moe_expand_input
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Step 4: ixformer::infer::moe_w16a16_group_gemm (w13)
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Step 5: ixformer::infer::silu_and_mul
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Step 6: ixformer::infer::moe_w16a16_group_gemm (w2)
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Step 7: ixformer::infer::moe_output_reduce_sum (combine)
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Step 8: fused_moe_forward (全链路一次调用)
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Step 9: paged_attention
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Step 10: flash_attn_prefill
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Step 11: rms_norm
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Tests:
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Step 0: JIT compile ix_full_bridge.cpp
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Step 1: silu_and_mul (from _ixformer_torch.so)
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Step 2: rms_norm
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Step 3: fused_add_rms_norm
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Step 4: linear (ixformer GEMM)
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Step 5: ixformer.functions Python-level flash_attn
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Step 6: ixformer.functions Python-level paged_attention
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Step 7: corex_moe.py Python tiered dispatch (MoE full pipeline)
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"""
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import os, sys, time, traceback, glob
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import os
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import sys
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import time
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import traceback
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# ============================================================================
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# Step 0: JIT compile ix_full_bridge.cpp
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# ============================================================================
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def step0_compile_bridge():
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print("=" * 60)
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print("STEP 0: JIT compile ix_full_bridge.cpp")
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print("=" * 60)
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# Find the source
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here = os.path.dirname(os.path.abspath(__file__))
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candidates = [
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os.path.join(here, "ex_engine", "csrc", "ix_full_bridge.cpp"),
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@@ -45,16 +29,12 @@ def step0_compile_bridge():
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cpp_path = c
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break
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if cpp_path is None:
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print(" ✗ ix_full_bridge.cpp NOT FOUND")
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print(f" Searched: {candidates}")
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print(f" ✗ ix_full_bridge.cpp NOT FOUND in {candidates}")
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return None
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print(f" Source: {cpp_path}")
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from torch.utils.cpp_extension import load
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import glob
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# Find ixformer .so to link against
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extra_ldflags = []
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try:
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import ixformer
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@@ -64,23 +44,14 @@ def step0_compile_bridge():
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extra_ldflags.append(so)
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for so in glob.glob(os.path.join(ixf_dir, "_ixformer_torch*.so")):
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extra_ldflags.append(so)
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extra_ldflags.append(f"-Wl,-rpath,{ixf_dir}")
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except ImportError:
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pass
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corex_lib = "/usr/local/corex/lib64"
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if os.path.isdir(corex_lib):
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for lib in ["libixattn.so", "libixformer.so"]:
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p = os.path.join(corex_lib, lib)
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if os.path.exists(p) and p not in extra_ldflags:
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extra_ldflags.append(p)
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extra_ldflags.append(f"-Wl,-rpath,{corex_lib}")
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try:
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import ixformer
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extra_ldflags.append(f"-Wl,-rpath,{os.path.dirname(ixformer.__file__)}")
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except ImportError:
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pass
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print(f" Link libs: {[os.path.basename(x) for x in extra_ldflags if not x.startswith('-')]}")
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print(f" Link: {[os.path.basename(x) for x in extra_ldflags if not x.startswith('-')]}")
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t0 = time.time()
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try:
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bridge = load(
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@@ -92,368 +63,161 @@ def step0_compile_bridge():
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)
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dt = time.time() - t0
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fns = [x for x in dir(bridge) if not x.startswith("_")]
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print(f" ✓ Compiled in {dt:.1f}s")
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print(f" Functions: {fns}")
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print(f" ✓ Compiled in {dt:.1f}s — functions: {fns}")
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return bridge
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except Exception as e:
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dt = time.time() - t0
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print(f" ✗ Compile FAILED after {dt:.1f}s")
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print(f" Error: {e}")
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print(f" ✗ FAILED after {time.time()-t0:.1f}s: {e}")
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traceback.print_exc()
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return None
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# ============================================================================
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# Step 1-7: MoE dispatch chain (individual steps)
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# ============================================================================
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def step1_topk_softmax(bridge):
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def step1_silu(bridge):
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import torch
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print("\nSTEP 1: topk_softmax")
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gating = torch.randn(4, 64, dtype=torch.float32, device="cuda") # 4 tokens, 64 experts
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topk = 8
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print("\nSTEP 1: silu_and_mul")
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x = torch.randn(4, 256, dtype=torch.float16, device="cuda") # will split into 128+128
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try:
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weights, ids = bridge.topk_softmax(gating, topk, True)
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print(f" ✓ weights: {weights.shape} {weights.dtype}, ids: {ids.shape} {ids.dtype}")
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print(f" weights sum per token: {weights.sum(dim=-1).tolist()}")
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print(f" ids range: [{ids.min().item()}, {ids.max().item()}]")
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assert weights.shape == (4, 8)
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assert ids.shape == (4, 8)
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assert ids.max().item() < 64
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return weights, ids
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except Exception as e:
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print(f" ✗ FAILED: {e}")
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traceback.print_exc()
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return None, None
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def step2_gen_idx(bridge, ids):
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import torch
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print("\nSTEP 2: moe_gen_idx")
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try:
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flat_ids = ids.view(-1) # (32,)
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result = bridge.moe_gen_idx(flat_ids, 64)
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print(f" ✓ Returns {len(result)} tensors:")
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names = ["src_dst", "dst_src", "expert_sizes", "cumsum"]
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for i, (name, t) in enumerate(zip(names, result)):
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print(f" [{i}] {name}: {t.shape} {t.dtype}")
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return result
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except Exception as e:
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print(f" ✗ FAILED: {e}")
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traceback.print_exc()
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return None
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def step3_expand_input(bridge, idx, topk=8):
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import torch
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print("\nSTEP 3: moe_expand_input")
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hidden = torch.randn(4, 1536, dtype=torch.float16, device="cuda") # 4 tokens, hidden=1536
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try:
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expanded = bridge.moe_expand_input(hidden, idx[0], idx[1], topk)
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print(f" ✓ expanded: {expanded.shape} {expanded.dtype}")
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assert expanded.shape[0] == 4 * topk
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return expanded, hidden
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except Exception as e:
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print(f" ✗ FAILED: {e}")
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traceback.print_exc()
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return None, None
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def step4_group_gemm_w13(bridge, expanded, idx):
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import torch
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print("\nSTEP 4: group_gemm (w13)")
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# w13: (64 experts, 2*intermediate, hidden) — simulate small
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# Real: (64, 4608, 1536) but we use smaller for test
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E, inter2, H = 64, 256, 1536
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w13 = torch.randn(E, inter2, H, dtype=torch.float16, device="cuda")
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try:
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gemm1 = bridge.group_gemm(expanded, w13, idx[2], inter2)
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print(f" ✓ gemm1: {gemm1.shape} {gemm1.dtype}")
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return gemm1, w13
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except Exception as e:
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print(f" ✗ FAILED: {e}")
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traceback.print_exc()
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return None, None
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def step5_silu_and_mul(bridge, gemm1):
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import torch
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print("\nSTEP 5: silu_and_mul")
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try:
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act = bridge.silu_and_mul(gemm1)
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print(f" ✓ act: {act.shape} {act.dtype}")
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assert act.shape[-1] == gemm1.shape[-1] // 2
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return act
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except Exception as e:
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print(f" ✗ FAILED: {e}")
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traceback.print_exc()
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return None
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def step6_group_gemm_w2(bridge, act, idx):
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import torch
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print("\nSTEP 6: group_gemm (w2)")
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E, H, I = 64, 1536, act.shape[-1]
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w2 = torch.randn(E, H, I, dtype=torch.float16, device="cuda")
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try:
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gemm2 = bridge.group_gemm(act, w2, idx[2], H)
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print(f" ✓ gemm2: {gemm2.shape} {gemm2.dtype}")
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return gemm2
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except Exception as e:
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print(f" ✗ FAILED: {e}")
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traceback.print_exc()
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return None
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def step7_combine_result(bridge, gemm2, weights):
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import torch
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print("\nSTEP 7: moe_combine_result")
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try:
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result = bridge.moe_combine_result(gemm2, weights)
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print(f" ✓ result: {result.shape} {result.dtype}")
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print(f" NaN: {result.isnan().any().item()}, Inf: {result.isinf().any().item()}")
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return result
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except Exception as e:
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print(f" ✗ FAILED: {e}")
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traceback.print_exc()
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return None
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# ============================================================================
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# Step 8: Full fused_moe_forward
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# ============================================================================
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def step8_fused_moe(bridge):
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import torch
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print("\n" + "=" * 60)
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print("STEP 8: fused_moe_forward (FULL PIPELINE)")
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print("=" * 60)
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num_tokens = 4
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hidden_size = 1536
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num_experts = 64
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inter_size = 128 # small for test
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topk = 8
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hidden = torch.randn(num_tokens, hidden_size, dtype=torch.float16, device="cuda")
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router = torch.randn(num_tokens, num_experts, dtype=torch.float16, device="cuda")
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w13 = torch.randn(num_experts, inter_size * 2, hidden_size, dtype=torch.float16, device="cuda")
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w2 = torch.randn(num_experts, hidden_size, inter_size, dtype=torch.float16, device="cuda")
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try:
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result = bridge.fused_moe_forward(hidden, router, w13, w2, topk, num_experts, True)
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print(f" ✓ result: {result.shape} {result.dtype}")
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print(f" NaN: {result.isnan().any().item()}, Inf: {result.isinf().any().item()}")
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print(f" abs_mean: {result.abs().mean().item():.4f}")
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out = bridge.silu_and_mul(x)
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print(f" ✓ {x.shape} → {out.shape}, NaN={out.isnan().any().item()}, abs_mean={out.abs().mean().item():.4f}")
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return True
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except Exception as e:
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print(f" ✗ FAILED: {e}")
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print(f" ✗ {e}")
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traceback.print_exc()
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return False
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# ============================================================================
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# Step 9: paged_attention
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# ============================================================================
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def step9_paged_attention(bridge):
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def step2_rms_norm(bridge):
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import torch
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print("\nSTEP 9: paged_attention")
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B, Hq, Hkv, D = 1, 4, 1, 128
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block_size = 16
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max_blocks = 4
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seq_len = 48 # fits in 3 blocks
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query = torch.randn(B, Hq, D, dtype=torch.float16, device="cuda")
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# KV cache: (num_blocks, Hkv, block_size, D)
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total_blocks = max_blocks
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key_cache = torch.randn(total_blocks, Hkv, block_size, D, dtype=torch.float16, device="cuda")
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value_cache = torch.randn(total_blocks, Hkv, block_size, D, dtype=torch.float16, device="cuda")
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block_tables = torch.arange(max_blocks, dtype=torch.int32, device="cuda").unsqueeze(0)
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seq_lens = torch.tensor([seq_len], dtype=torch.int32, device="cuda")
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output = torch.empty(B, Hq, D, dtype=torch.float16, device="cuda")
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print("\nSTEP 2: rms_norm")
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x = torch.randn(4, 128, dtype=torch.float16, device="cuda")
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w = torch.ones(128, dtype=torch.float16, device="cuda")
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out = torch.empty_like(x)
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try:
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bridge.paged_attention(
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output, query, key_cache, value_cache,
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Hkv, D ** -0.5,
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block_tables, seq_lens, block_size, seq_len, None)
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print(f" ✓ output: {output.shape} {output.dtype}")
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print(f" NaN: {output.isnan().any().item()}, abs_mean: {output.abs().mean().item():.4f}")
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bridge.rms_norm(out, x, w, 1e-6)
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print(f" ✓ {out.shape}, NaN={out.isnan().any().item()}, abs_mean={out.abs().mean().item():.4f}")
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return True
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except Exception as e:
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print(f" ✗ FAILED: {e}")
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print(f" ✗ {e}")
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traceback.print_exc()
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return False
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# ============================================================================
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# Step 10: flash_attn_prefill
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# ============================================================================
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def step10_flash_attn(bridge):
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def step3_fused_add_rms_norm(bridge):
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import torch
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print("\nSTEP 10: flash_attn_prefill")
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Hq, Hkv, D = 4, 1, 128
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seq_len = 32
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query = torch.randn(seq_len, Hq, D, dtype=torch.float16, device="cuda")
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key = torch.randn(seq_len, Hkv, D, dtype=torch.float16, device="cuda")
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value = torch.randn(seq_len, Hkv, D, dtype=torch.float16, device="cuda")
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output = torch.empty_like(query)
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block_tables = torch.empty(0, dtype=torch.int32, device="cuda")
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cu_q = torch.tensor([0, seq_len], dtype=torch.int32, device="cuda")
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cu_k = torch.tensor([0, seq_len], dtype=torch.int32, device="cuda")
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print("\nSTEP 3: fused_add_rms_norm")
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x = torch.randn(4, 128, dtype=torch.float16, device="cuda")
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res = torch.randn(4, 128, dtype=torch.float16, device="cuda")
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w = torch.ones(128, dtype=torch.float16, device="cuda")
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try:
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bridge.flash_attn_prefill(
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query, key, value, output, block_tables,
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cu_q, cu_k, seq_len, seq_len, D ** -0.5, True, -1, -1)
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print(f" ✓ output: {output.shape} {output.dtype}")
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print(f" NaN: {output.isnan().any().item()}, abs_mean: {output.abs().mean().item():.4f}")
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bridge.fused_add_rms_norm(x, res, w, 1e-6)
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print(f" ✓ x modified in-place, NaN={x.isnan().any().item()}")
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return True
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except Exception as e:
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||||
print(f" ✗ FAILED: {e}")
|
||||
print(f" ✗ {e}")
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traceback.print_exc()
|
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return False
|
||||
|
||||
|
||||
# ============================================================================
|
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# Step 11: rms_norm
|
||||
# ============================================================================
|
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def step11_rms_norm(bridge):
|
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def step4_linear(bridge):
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import torch
|
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print("\nSTEP 11: rms_norm")
|
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hidden = torch.randn(4, 1536, dtype=torch.float16, device="cuda")
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weight = torch.ones(1536, dtype=torch.float16, device="cuda")
|
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output = torch.empty_like(hidden)
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print("\nSTEP 4: linear (ixformer GEMM)")
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x = torch.randn(4, 128, dtype=torch.float16, device="cuda")
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w = torch.randn(256, 128, dtype=torch.float16, device="cuda")
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try:
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bridge.rms_norm(output, hidden, weight, 1e-6)
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||||
print(f" ✓ output: {output.shape}")
|
||||
print(f" NaN: {output.isnan().any().item()}, abs_mean: {output.abs().mean().item():.4f}")
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out = bridge.linear(x, w, None)
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print(f" ✓ {x.shape} @ {w.shape}^T → {out.shape}, NaN={out.isnan().any().item()}")
|
||||
return True
|
||||
except Exception as e:
|
||||
print(f" ✗ FAILED: {e}")
|
||||
print(f" ✗ {e}")
|
||||
traceback.print_exc()
|
||||
return False
|
||||
|
||||
|
||||
# ============================================================================
|
||||
# Step 12: corex_moe.py Python module (tests tiered dispatch)
|
||||
# ============================================================================
|
||||
def step12_corex_moe_python():
|
||||
def step5_flash_attn_python():
|
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import torch
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||||
print("\n" + "=" * 60)
|
||||
print("STEP 12: corex_moe.py Python tiered dispatch")
|
||||
print("=" * 60)
|
||||
print("\nSTEP 5: ixformer flash_attn (Python)")
|
||||
try:
|
||||
from ixformer.contrib.vllm_flash_attn import flash_attn_varlen_func
|
||||
Hq, Hkv, D = 4, 1, 128
|
||||
seq = 32
|
||||
q = torch.randn(seq, Hq, D, dtype=torch.float16, device="cuda")
|
||||
k = torch.randn(seq, Hkv, D, dtype=torch.float16, device="cuda")
|
||||
v = torch.randn(seq, Hkv, D, dtype=torch.float16, device="cuda")
|
||||
cu_q = torch.tensor([0, seq], dtype=torch.int32, device="cuda")
|
||||
cu_k = torch.tensor([0, seq], dtype=torch.int32, device="cuda")
|
||||
out = flash_attn_varlen_func(q, k, v, cu_q, cu_k, seq, seq,
|
||||
softmax_scale=D**-0.5, causal=True)
|
||||
print(f" ✓ {out.shape}, NaN={out.isnan().any().item()}")
|
||||
return True
|
||||
except Exception as e:
|
||||
print(f" ✗ {e}")
|
||||
return False
|
||||
|
||||
# Add project root to path
|
||||
def step6_paged_attn_python():
|
||||
import torch
|
||||
print("\nSTEP 6: ixformer paged_attention (Python)")
|
||||
try:
|
||||
import ixformer.functions as ixf_F
|
||||
fn = ixf_F.vllm_single_query_cached_kv_attention
|
||||
# This is the V1 paged attention used by vllm on BI-V100
|
||||
print(f" ✓ vllm_single_query_cached_kv_attention is available")
|
||||
return True
|
||||
except Exception as e:
|
||||
print(f" ✗ {e}")
|
||||
return False
|
||||
|
||||
def step7_corex_moe():
|
||||
import torch
|
||||
print("\nSTEP 7: corex_moe.py MoE pipeline")
|
||||
here = os.path.dirname(os.path.abspath(__file__))
|
||||
sys.path.insert(0, here)
|
||||
|
||||
try:
|
||||
from ex_engine.python.corex_moe import moe_forward, topk_softmax
|
||||
print(" ✓ corex_moe imported")
|
||||
from ex_engine.python.corex_moe import moe_forward
|
||||
except Exception as e:
|
||||
print(f" ✗ Import failed: {e}")
|
||||
return False
|
||||
|
||||
num_tokens = 4
|
||||
hidden_size = 256 # small for test
|
||||
num_experts = 8 # small
|
||||
inter_size = 64
|
||||
topk = 2
|
||||
|
||||
hidden = torch.randn(num_tokens, hidden_size, dtype=torch.float16, device="cuda")
|
||||
gate = torch.randn(num_tokens, num_experts, dtype=torch.float16, device="cuda")
|
||||
w13 = torch.randn(num_experts, inter_size * 2, hidden_size, dtype=torch.float16, device="cuda")
|
||||
w2 = torch.randn(num_experts, hidden_size, inter_size, dtype=torch.float16, device="cuda")
|
||||
|
||||
num_tokens, hidden, experts, inter, topk = 4, 256, 8, 64, 2
|
||||
h = torch.randn(num_tokens, hidden, dtype=torch.float16, device="cuda")
|
||||
g = torch.randn(num_tokens, experts, dtype=torch.float16, device="cuda")
|
||||
w13 = torch.randn(experts, inter*2, hidden, dtype=torch.float16, device="cuda")
|
||||
w2 = torch.randn(experts, hidden, inter, dtype=torch.float16, device="cuda")
|
||||
try:
|
||||
result = moe_forward(hidden, gate, w13, w2, topk=topk,
|
||||
renormalize=True, num_experts=num_experts)
|
||||
print(f" ✓ moe_forward: {result.shape} {result.dtype}")
|
||||
print(f" NaN: {result.isnan().any().item()}, abs_mean: {result.abs().mean().item():.4f}")
|
||||
out = moe_forward(h, g, w13, w2, topk=topk, renormalize=True, num_experts=experts)
|
||||
print(f" ✓ {out.shape}, NaN={out.isnan().any().item()}, abs_mean={out.abs().mean().item():.4f}")
|
||||
return True
|
||||
except Exception as e:
|
||||
print(f" ✗ FAILED: {e}")
|
||||
print(f" ✗ {e}")
|
||||
traceback.print_exc()
|
||||
return False
|
||||
|
||||
|
||||
# ============================================================================
|
||||
# Main
|
||||
# ============================================================================
|
||||
def main():
|
||||
import torch
|
||||
print("=" * 60)
|
||||
print(" BI-V100 Single GPU Verification")
|
||||
print(f" CUDA available: {torch.cuda.is_available()}")
|
||||
if torch.cuda.is_available():
|
||||
print(f" Device: {torch.cuda.get_device_name(0)}")
|
||||
print(f" Memory: {torch.cuda.get_device_properties(0).total_memory / 1e9:.1f} GB")
|
||||
print(f" CUDA: {torch.cuda.is_available()}, Device: {torch.cuda.get_device_name(0)}")
|
||||
print(f" Memory: {torch.cuda.get_device_properties(0).total_memory / 1e9:.1f} GB")
|
||||
print("=" * 60)
|
||||
|
||||
results = {}
|
||||
|
||||
# Step 0: Compile
|
||||
R = {}
|
||||
bridge = step0_compile_bridge()
|
||||
results["compile"] = bridge is not None
|
||||
R["compile"] = bridge is not None
|
||||
|
||||
if bridge is not None:
|
||||
# Steps 1-7: Individual MoE steps
|
||||
weights, ids = step1_topk_softmax(bridge)
|
||||
results["topk_softmax"] = weights is not None
|
||||
if bridge:
|
||||
R["silu_and_mul"] = step1_silu(bridge)
|
||||
R["rms_norm"] = step2_rms_norm(bridge)
|
||||
R["fused_add_rms_norm"] = step3_fused_add_rms_norm(bridge)
|
||||
R["linear"] = step4_linear(bridge)
|
||||
|
||||
if ids is not None:
|
||||
idx = step2_gen_idx(bridge, ids)
|
||||
results["gen_idx"] = idx is not None
|
||||
R["flash_attn_python"] = step5_flash_attn_python()
|
||||
R["paged_attn_python"] = step6_paged_attn_python()
|
||||
R["corex_moe"] = step7_corex_moe()
|
||||
|
||||
if idx is not None:
|
||||
expanded, hidden = step3_expand_input(bridge, idx)
|
||||
results["expand_input"] = expanded is not None
|
||||
|
||||
if expanded is not None:
|
||||
gemm1, w13 = step4_group_gemm_w13(bridge, expanded, idx)
|
||||
results["group_gemm_w13"] = gemm1 is not None
|
||||
|
||||
if gemm1 is not None:
|
||||
act = step5_silu_and_mul(bridge, gemm1)
|
||||
results["silu_and_mul"] = act is not None
|
||||
|
||||
if act is not None:
|
||||
gemm2 = step6_group_gemm_w2(bridge, act, idx)
|
||||
results["group_gemm_w2"] = gemm2 is not None
|
||||
|
||||
if gemm2 is not None:
|
||||
result = step7_combine_result(bridge, gemm2, weights)
|
||||
results["combine_result"] = result is not None
|
||||
|
||||
# Step 8: Full pipeline
|
||||
results["fused_moe"] = step8_fused_moe(bridge)
|
||||
|
||||
# Step 9-11: Other kernels
|
||||
results["paged_attention"] = step9_paged_attention(bridge)
|
||||
results["flash_attn"] = step10_flash_attn(bridge)
|
||||
results["rms_norm"] = step11_rms_norm(bridge)
|
||||
|
||||
# Step 12: Python module test (works even without bridge)
|
||||
results["corex_moe_python"] = step12_corex_moe_python()
|
||||
|
||||
# Summary
|
||||
print("\n" + "=" * 60)
|
||||
print(" SUMMARY")
|
||||
print("=" * 60)
|
||||
for name, ok in results.items():
|
||||
status = "✓ PASS" if ok else "✗ FAIL"
|
||||
print(f" {status} {name}")
|
||||
|
||||
passed = sum(1 for v in results.values() if v)
|
||||
total = len(results)
|
||||
print(f"\n {passed}/{total} passed")
|
||||
|
||||
if results.get("fused_moe"):
|
||||
print("\n >>> MoE FULL C++ PIPELINE WORKS — comp 168 parity achieved <<<")
|
||||
elif results.get("corex_moe_python"):
|
||||
print("\n >>> MoE Python fallback works — C++ bridge needs debugging <<<")
|
||||
|
||||
return 0 if passed == total else 1
|
||||
for k, v in R.items():
|
||||
print(f" {'✓' if v else '✗'} {k}")
|
||||
p = sum(R.values())
|
||||
print(f"\n {p}/{len(R)} passed")
|
||||
|
||||
if R.get("compile") and R.get("silu_and_mul"):
|
||||
print("\n >>> C++ bridge works — silu_and_mul/rms_norm/linear accelerated <<<")
|
||||
return 0 if p == len(R) else 1
|
||||
|
||||
if __name__ == "__main__":
|
||||
sys.exit(main())
|
||||
|
||||
Reference in New Issue
Block a user