[NVIDIA] Fix unit test of MoE and add it to nightly ci (#12709)
This commit is contained in:
@@ -1,698 +0,0 @@
|
||||
# SPDX-License-Identifier: Apache-2.0
|
||||
from typing import Callable
|
||||
|
||||
import pytest
|
||||
import torch
|
||||
from flashinfer import fp4_quantize
|
||||
from flashinfer.fused_moe import cutlass_fused_moe as flashinfer_cutlass_fused_moe
|
||||
from sgl_kernel import scaled_fp4_grouped_quant, scaled_fp4_quant
|
||||
from torch.nn import functional as F
|
||||
|
||||
from sglang.srt.layers.activation import SiluAndMul
|
||||
from sglang.srt.layers.moe.cutlass_moe import cutlass_moe_fp4
|
||||
from sglang.srt.layers.moe.cutlass_moe_params import CutlassMoEParams, CutlassMoEType
|
||||
from sglang.srt.layers.moe.flashinfer_cutedsl_moe import flashinfer_cutedsl_moe_masked
|
||||
from sglang.srt.layers.moe.topk import TopKConfig, select_experts
|
||||
|
||||
if torch.cuda.get_device_capability() < (10, 0):
|
||||
pytest.skip(
|
||||
reason="Nvfp4 Requires compute capability of 10 or above.",
|
||||
allow_module_level=True,
|
||||
)
|
||||
|
||||
kE2M1ToFloat = torch.tensor(
|
||||
[0.0, 0.5, 1.0, 1.5, 2.0, 3.0, 4.0, 6.0], dtype=torch.float32
|
||||
)
|
||||
|
||||
FLOAT8_E4M3_MAX = 448.0
|
||||
FLOAT4_E2M1_MAX = 6.0
|
||||
|
||||
|
||||
def convert_swizzled_to_linear(a_sf_swizzled: torch.Tensor, m, k, block_size):
|
||||
m_tiles = (m + 128 - 1) // 128
|
||||
f = block_size * 4
|
||||
k_tiles = (k + f - 1) // f
|
||||
tmp = torch.reshape(a_sf_swizzled, (1, m_tiles, k_tiles, 32, 4, 4))
|
||||
tmp = torch.permute(tmp, (0, 1, 4, 3, 2, 5))
|
||||
out = tmp.reshape(m_tiles * 128, k_tiles * f // block_size)
|
||||
return out[0:m, 0:k]
|
||||
|
||||
|
||||
def dequantize_nvfp4_to_dtype(
|
||||
tensor_fp4, tensor_sf, global_scale, dtype, device, block_size=16
|
||||
):
|
||||
"""Dequantize the fp4 tensor back to high precision."""
|
||||
# Two fp4 values are packed into one uint8.
|
||||
assert tensor_fp4.dtype == torch.uint8
|
||||
m, packed_k = tensor_fp4.shape
|
||||
k = packed_k * 2
|
||||
tensor_f32 = break_fp4_bytes(tensor_fp4, dtype)
|
||||
tensor_f32 = tensor_f32.reshape(m, k // block_size, block_size)
|
||||
tensor_sf = tensor_sf.view(torch.float8_e4m3fn)
|
||||
tensor_sf = convert_swizzled_to_linear(tensor_sf, m, k, block_size)
|
||||
tensor_sf_dtype = tensor_sf.to(torch.float32) / global_scale
|
||||
|
||||
# scale the tensor
|
||||
out = (tensor_f32 * tensor_sf_dtype.unsqueeze(-1)).reshape(m, k)
|
||||
return out.to(dtype=dtype)
|
||||
|
||||
|
||||
def break_fp4_bytes(a, dtype):
|
||||
assert a.dtype == torch.uint8
|
||||
m, n = a.shape
|
||||
|
||||
# Vectorized nibble processing
|
||||
a_flat = a.flatten()
|
||||
high = (a_flat & 0xF0) >> 4 # Upper nibbles
|
||||
low = a_flat & 0x0F # Lower nibbles
|
||||
|
||||
# Combine nibbles for batch processing
|
||||
combined = torch.stack((low, high), dim=1).flatten()
|
||||
|
||||
# Vectorized sign and magnitude extraction
|
||||
signs = (combined & 0x08).to(torch.bool) # Sign bits
|
||||
abs_vals = (combined & 0x07).to(torch.long) # Magnitude indices
|
||||
|
||||
# Device-aware lookup and sign application
|
||||
kE2M1 = kE2M1ToFloat.to(device=a.device)
|
||||
values = kE2M1[abs_vals] * torch.where(signs, -1.0, 1.0)
|
||||
|
||||
# Reshape to final form
|
||||
return values.reshape(m, n * 2).to(dtype=dtype)
|
||||
|
||||
|
||||
def compute_routing(router_logits: torch.Tensor, top_k: int):
|
||||
routing_weights = torch.softmax(router_logits, dim=1, dtype=torch.float)
|
||||
routing_weights, selected_experts = torch.topk(routing_weights, top_k, dim=-1)
|
||||
routing_weights /= routing_weights.sum(dim=-1, keepdim=True)
|
||||
routing_weights = routing_weights.float()
|
||||
return routing_weights, selected_experts
|
||||
|
||||
|
||||
def prepare_inputs(
|
||||
hidden_states: torch.Tensor,
|
||||
router_logits: torch.Tensor,
|
||||
num_experts: int,
|
||||
topk: int,
|
||||
):
|
||||
routing_weights, topk_idx = compute_routing(router_logits, topk)
|
||||
|
||||
masked_m = []
|
||||
for i in range(num_experts):
|
||||
mask = topk_idx.view(-1) == i
|
||||
masked_m.append(mask.sum())
|
||||
|
||||
masked_m = torch.tensor(masked_m, dtype=torch.int32)
|
||||
hidden_states_3d = torch.empty(
|
||||
(num_experts, max(masked_m), hidden_states.shape[1]), dtype=hidden_states.dtype
|
||||
)
|
||||
for i in range(num_experts):
|
||||
hidden_states_3d[i, : masked_m[i], :] = hidden_states[topk_idx.view(-1) == i]
|
||||
|
||||
return hidden_states_3d, masked_m, topk_idx, routing_weights
|
||||
|
||||
|
||||
MNK_FACTORS = [
|
||||
(2, 1024, 1024),
|
||||
(2, 1024, 1536),
|
||||
(2, 3072, 1024),
|
||||
(2, 3072, 1536),
|
||||
(64, 1024, 1024),
|
||||
(64, 1024, 1536),
|
||||
(64, 3072, 1024),
|
||||
(64, 2048, 1024),
|
||||
(224, 1024, 1024),
|
||||
(224, 1024, 1536),
|
||||
]
|
||||
|
||||
|
||||
# Reference implementation of torch_moe
|
||||
def torch_moe(a, w1, w2, score, topk, expert_map):
|
||||
B, D = a.shape
|
||||
a = a.view(B, -1, D).repeat(1, topk, 1).reshape(-1, D)
|
||||
out = torch.zeros(B * topk, w2.shape[1], dtype=a.dtype, device=a.device)
|
||||
score = torch.softmax(score, dim=-1, dtype=torch.float32)
|
||||
topk_weight, topk_ids = torch.topk(score, topk)
|
||||
topk_weight = topk_weight.view(-1)
|
||||
topk_ids = topk_ids.view(-1)
|
||||
if expert_map is not None:
|
||||
topk_ids = expert_map[topk_ids]
|
||||
for i in range(w1.shape[0]):
|
||||
mask = topk_ids == i
|
||||
if mask.sum():
|
||||
out[mask] = SiluAndMul()(a[mask] @ w1[i].transpose(0, 1)) @ w2[i].transpose(
|
||||
0, 1
|
||||
)
|
||||
return (
|
||||
out.view(B, -1, w2.shape[1]) * topk_weight.view(B, -1, 1).to(out.dtype)
|
||||
).sum(dim=1)
|
||||
|
||||
|
||||
def torch_moe_nvfp4(a, w1, w2, topk, topk_weight, topk_ids):
|
||||
B, D = a.shape
|
||||
a = a.view(B, -1, D).repeat(1, topk, 1).reshape(-1, D)
|
||||
out = torch.zeros(B * topk, w2.shape[1], dtype=a.dtype, device=a.device)
|
||||
|
||||
topk_weight = topk_weight.view(-1)
|
||||
topk_ids = topk_ids.view(-1)
|
||||
|
||||
for i in range(w1.shape[0]):
|
||||
mask = topk_ids == i
|
||||
if mask.sum():
|
||||
m = w1[i].shape[0]
|
||||
assert m % 2 == 0
|
||||
# Note: w1 and w3 are swapped!
|
||||
w3_expert, w1_expert = w1[i][m // 2 :, :], w1[i][: m // 2, :]
|
||||
inter = F.silu(a[mask] @ w1_expert.t()) * (a[mask] @ w3_expert.t())
|
||||
inter_gs = torch.tensor(1.0).cuda()
|
||||
inter_q, inter_blockscale = fp4_quantize(inter, inter_gs)
|
||||
inter = dequantize_nvfp4_to_dtype(
|
||||
inter_q,
|
||||
inter_blockscale,
|
||||
inter_gs,
|
||||
dtype=inter.dtype,
|
||||
device=inter.device,
|
||||
block_size=16,
|
||||
).cuda()
|
||||
out[mask] = inter @ w2[i].transpose(0, 1)
|
||||
return (
|
||||
out.view(B, -1, w2.shape[1]) * topk_weight.view(B, -1, 1).to(out.dtype)
|
||||
).sum(dim=1)
|
||||
|
||||
|
||||
def flashinfer_cutedsl_grouped_gemm_nt_masked(
|
||||
hidden_states: torch.Tensor, # 3d
|
||||
input_global_scale: torch.Tensor, # (l,)
|
||||
weights: torch.Tensor,
|
||||
w_global_scale: torch.Tensor, # (l,)
|
||||
masked_m: torch.Tensor,
|
||||
):
|
||||
from flashinfer.cute_dsl.blockscaled_gemm import grouped_gemm_nt_masked
|
||||
|
||||
# hidden_states: [l, m, k]
|
||||
# weights: [l, n, k]
|
||||
aq, aq_sf = scaled_fp4_grouped_quant(
|
||||
hidden_states,
|
||||
input_global_scale,
|
||||
masked_m.to(hidden_states.device),
|
||||
)
|
||||
num_experts, n, k = weights.shape
|
||||
bq, bq_sf = scaled_fp4_grouped_quant(
|
||||
weights,
|
||||
w_global_scale,
|
||||
torch.ones(num_experts, device=weights.device, dtype=torch.int32) * n,
|
||||
)
|
||||
|
||||
out = torch.zeros(
|
||||
(num_experts, max(masked_m), n), dtype=weights.dtype, device=aq.device
|
||||
)
|
||||
out = out.permute(1, 2, 0) # requirement of kernel
|
||||
sf_vec_size = 16
|
||||
ab_dtype = "float4_e2m1fn"
|
||||
sf_dtype = "float8_e4m3fn"
|
||||
c_dtype = "bfloat16"
|
||||
alpha = 1.0 / (input_global_scale * w_global_scale).to(out.dtype).view(
|
||||
1, 1, num_experts
|
||||
)
|
||||
|
||||
def get_cute_dtype(input: torch.Tensor) -> str:
|
||||
if input.dtype == torch.bfloat16:
|
||||
return "bfloat16"
|
||||
elif input.dtype == torch.float16:
|
||||
return "float16"
|
||||
elif input.dtype == torch.float32:
|
||||
return "float32"
|
||||
else:
|
||||
raise ValueError(f"Unsupported cute dtype {input.dtype}")
|
||||
|
||||
grouped_gemm_nt_masked(
|
||||
(aq, aq_sf),
|
||||
(bq, bq_sf),
|
||||
out,
|
||||
masked_m.to(aq.device),
|
||||
ab_dtype=ab_dtype,
|
||||
sf_dtype=sf_dtype,
|
||||
c_dtype=c_dtype,
|
||||
sf_vec_size=sf_vec_size,
|
||||
alpha=alpha,
|
||||
alpha_dtype=get_cute_dtype(alpha),
|
||||
)
|
||||
|
||||
return out
|
||||
|
||||
|
||||
def check_moe(
|
||||
m: int,
|
||||
n: int,
|
||||
k: int,
|
||||
e: int,
|
||||
topk: int,
|
||||
dtype: torch.dtype,
|
||||
moe_impl: Callable,
|
||||
flip_w13: bool,
|
||||
):
|
||||
torch.manual_seed(7)
|
||||
a = torch.randn((m, k), device="cuda", dtype=dtype) / 10
|
||||
w1 = torch.randn((e, 2 * n, k), device="cuda", dtype=dtype) / 10
|
||||
quant_blocksize = 16
|
||||
round_up = lambda x, y: (x + y - 1) // y * y
|
||||
sf_w1_2n = round_up(2 * n, 128)
|
||||
sf_w1_k = round_up(k // quant_blocksize, 4)
|
||||
w1_blockscale = torch.empty(
|
||||
(e, sf_w1_2n, sf_w1_k), device="cuda", dtype=torch.float8_e4m3fn
|
||||
)
|
||||
|
||||
w2 = torch.randn((e, k, n), device="cuda", dtype=dtype) / 10
|
||||
sf_w2_k = round_up(k, 128)
|
||||
sf_w2_n = round_up(n // quant_blocksize, 4)
|
||||
w2_blockscale = torch.empty(
|
||||
(e, sf_w2_k, sf_w2_n), device="cuda", dtype=torch.float8_e4m3fn
|
||||
)
|
||||
|
||||
w1_q = torch.empty((e, 2 * n, k // 2), device="cuda", dtype=torch.uint8)
|
||||
w2_q = torch.empty((e, k, n // 2), device="cuda", dtype=torch.uint8)
|
||||
w1_gs = torch.empty((e,), device="cuda", dtype=torch.float32)
|
||||
w2_gs = torch.empty((e,), device="cuda", dtype=torch.float32)
|
||||
|
||||
for expert in range(e):
|
||||
w1_amax = torch.abs(w1).max().to(torch.float32)
|
||||
w2_amax = torch.abs(w2).max().to(torch.float32)
|
||||
w1_gs[expert] = FLOAT8_E4M3_MAX * FLOAT4_E2M1_MAX / w1_amax
|
||||
w2_gs[expert] = FLOAT8_E4M3_MAX * FLOAT4_E2M1_MAX / w2_amax
|
||||
|
||||
w1_q[expert], w1_blockscale[expert] = scaled_fp4_quant(
|
||||
w1[expert], w1_gs[expert]
|
||||
)
|
||||
|
||||
w2_q[expert], w2_blockscale[expert] = scaled_fp4_quant(
|
||||
w2[expert], w2_gs[expert]
|
||||
)
|
||||
|
||||
score = torch.randn((m, e), device="cuda", dtype=dtype)
|
||||
|
||||
topk_output = select_experts(
|
||||
hidden_states=a,
|
||||
router_logits=score,
|
||||
topk_config=TopKConfig(top_k=topk, renormalize=False),
|
||||
)
|
||||
topk_weights, topk_ids, _ = topk_output
|
||||
|
||||
a1_gs = torch.ones((e,), device="cuda", dtype=torch.float32)
|
||||
a2_gs = torch.ones((e,), device="cuda", dtype=torch.float32)
|
||||
test_output = moe_impl(
|
||||
a=a,
|
||||
topk_weights=topk_weights,
|
||||
topk_ids=topk_ids,
|
||||
w1_q=w1_q,
|
||||
w2_q=w2_q,
|
||||
a1_gs=a1_gs,
|
||||
w1_blockscale=w1_blockscale,
|
||||
w1_alphas=(1 / w1_gs),
|
||||
a2_gs=a2_gs,
|
||||
w2_blockscale=w2_blockscale,
|
||||
w2_alphas=(1 / w2_gs),
|
||||
)
|
||||
|
||||
# Reference check:
|
||||
a_global_scale = (
|
||||
(FLOAT8_E4M3_MAX * FLOAT4_E2M1_MAX) / torch.amax(a.flatten(), dim=-1)
|
||||
).to(torch.float32)
|
||||
a_fp4, a_scale_interleaved = scaled_fp4_quant(a, a_global_scale)
|
||||
_, m_k = a_fp4.shape
|
||||
a_in_dtype = dequantize_nvfp4_to_dtype(
|
||||
a_fp4,
|
||||
a_scale_interleaved,
|
||||
a_global_scale,
|
||||
dtype=a.dtype,
|
||||
device=a.device,
|
||||
block_size=quant_blocksize,
|
||||
)
|
||||
|
||||
w1_d = torch.empty((e, 2 * n, k), device="cuda", dtype=dtype)
|
||||
w2_d = torch.empty((e, k, n), device="cuda", dtype=dtype)
|
||||
|
||||
for idx in range(0, e):
|
||||
w1_d[idx] = dequantize_nvfp4_to_dtype(
|
||||
w1_q[idx],
|
||||
w1_blockscale[idx],
|
||||
w1_gs[idx],
|
||||
dtype=w1.dtype,
|
||||
device=w1.device,
|
||||
block_size=quant_blocksize,
|
||||
)
|
||||
w2_d[idx] = dequantize_nvfp4_to_dtype(
|
||||
w2_q[idx],
|
||||
w2_blockscale[idx],
|
||||
w2_gs[idx],
|
||||
dtype=w2.dtype,
|
||||
device=w2.device,
|
||||
block_size=quant_blocksize,
|
||||
)
|
||||
|
||||
if flip_w13:
|
||||
dim = -2
|
||||
size = w1_d.size(dim)
|
||||
assert size % 2 == 0, f"Expected even size in dim {dim}, got {size}"
|
||||
half = size // 2
|
||||
# Reorder weight
|
||||
w1, w3 = w1_d.split(half, dim=dim)
|
||||
w1_d = torch.cat([w3, w1], dim=dim).contiguous()
|
||||
|
||||
torch_output = torch_moe(a_in_dtype, w1_d, w2_d, score, topk, None)
|
||||
|
||||
torch.testing.assert_close(torch_output, test_output, atol=1e-1, rtol=1e-1)
|
||||
|
||||
|
||||
@pytest.mark.parametrize("m,n,k", MNK_FACTORS)
|
||||
@pytest.mark.parametrize("e", [40, 64, 256])
|
||||
@pytest.mark.parametrize("topk", [1, 6, 8])
|
||||
@pytest.mark.parametrize("dtype", [torch.half, torch.bfloat16])
|
||||
@torch.inference_mode()
|
||||
def test_cutlass_fp4_moe_no_graph(
|
||||
m: int, n: int, k: int, e: int, topk: int, dtype: torch.dtype
|
||||
):
|
||||
def cutlass_moe_impl(
|
||||
a,
|
||||
topk_weights,
|
||||
topk_ids,
|
||||
w1_q,
|
||||
w2_q,
|
||||
a1_gs,
|
||||
w1_blockscale,
|
||||
w1_alphas,
|
||||
a2_gs,
|
||||
w2_blockscale,
|
||||
w2_alphas,
|
||||
):
|
||||
params = CutlassMoEParams(
|
||||
CutlassMoEType.BlockscaledFP4,
|
||||
device=a.device,
|
||||
num_experts=e,
|
||||
intermediate_size_per_partition=n, # n
|
||||
hidden_size=k,
|
||||
) # k
|
||||
return cutlass_moe_fp4(
|
||||
a=a,
|
||||
a1_gscale=a1_gs,
|
||||
w1_fp4=w1_q,
|
||||
w1_blockscale=w1_blockscale,
|
||||
w1_alphas=w1_alphas,
|
||||
a2_gscale=a2_gs,
|
||||
w2_fp4=w2_q,
|
||||
w2_blockscale=w2_blockscale,
|
||||
w2_alphas=w2_alphas,
|
||||
topk_weights=topk_weights,
|
||||
topk_ids=topk_ids,
|
||||
params=params,
|
||||
apply_router_weight_on_input=False,
|
||||
)
|
||||
|
||||
check_moe(m, n, k, e, topk, dtype, cutlass_moe_impl, flip_w13=False)
|
||||
|
||||
|
||||
@pytest.mark.parametrize("m,n,k", MNK_FACTORS)
|
||||
@pytest.mark.parametrize("e", [40, 64, 256])
|
||||
@pytest.mark.parametrize("topk", [1, 6, 8])
|
||||
@pytest.mark.parametrize("dtype", [torch.half, torch.bfloat16])
|
||||
@torch.inference_mode()
|
||||
def test_flashinfer_fp4_moe_no_graph(
|
||||
m: int, n: int, k: int, e: int, topk: int, dtype: torch.dtype
|
||||
):
|
||||
def flashinfer_moe_impl(
|
||||
a,
|
||||
topk_weights,
|
||||
topk_ids,
|
||||
w1_q,
|
||||
w2_q,
|
||||
a1_gs,
|
||||
w1_blockscale,
|
||||
w1_alphas,
|
||||
a2_gs,
|
||||
w2_blockscale,
|
||||
w2_alphas,
|
||||
):
|
||||
return flashinfer_cutlass_fused_moe(
|
||||
a,
|
||||
topk_ids.to(torch.int),
|
||||
topk_weights,
|
||||
w1_q.view(torch.long),
|
||||
w2_q.view(torch.long),
|
||||
a.dtype,
|
||||
quant_scales=[
|
||||
a1_gs,
|
||||
w1_blockscale.view(torch.int32),
|
||||
w1_alphas,
|
||||
a2_gs,
|
||||
w2_blockscale.view(torch.int32),
|
||||
w2_alphas,
|
||||
],
|
||||
)[0]
|
||||
|
||||
check_moe(m, n, k, e, topk, dtype, flashinfer_moe_impl, flip_w13=True)
|
||||
|
||||
|
||||
@pytest.mark.parametrize("bs, hidden_dim, inter_dim", [(2, 128, 256), (16, 128, 512)])
|
||||
@pytest.mark.parametrize("topk", [1, 2, 4])
|
||||
@torch.inference_mode()
|
||||
def test_flashinfer_cutedsl_moe_masked(
|
||||
bs: int, hidden_dim: int, inter_dim: int, topk: int
|
||||
):
|
||||
torch.manual_seed(42)
|
||||
device = "cuda"
|
||||
dtype = torch.bfloat16
|
||||
num_experts = 8
|
||||
hidden_states = (
|
||||
torch.randn(bs, hidden_dim, dtype=torch.bfloat16, device=device) / 5.0
|
||||
)
|
||||
w1 = (
|
||||
torch.randn(
|
||||
num_experts, 2 * inter_dim, hidden_dim, dtype=torch.bfloat16, device=device
|
||||
)
|
||||
/ 10.0
|
||||
)
|
||||
w2 = (
|
||||
torch.randn(
|
||||
num_experts, hidden_dim, inter_dim, dtype=torch.bfloat16, device=device
|
||||
)
|
||||
/ 10.0
|
||||
)
|
||||
router_logits = torch.randn(bs, num_experts, dtype=torch.float32)
|
||||
|
||||
hidden_states_expanded = (
|
||||
hidden_states.view(bs, -1, hidden_dim)
|
||||
.repeat(1, topk, 1)
|
||||
.reshape(-1, hidden_dim)
|
||||
)
|
||||
hidden_states_3d, masked_m, topk_idx, routing_weights = prepare_inputs(
|
||||
hidden_states_expanded, router_logits, num_experts, topk
|
||||
)
|
||||
|
||||
w1_amax = w1.abs().amax(dim=(1, 2)).to(torch.float32).to(w1.device)
|
||||
w2_amax = w2.abs().amax(dim=(1, 2)).to(torch.float32).to(w2.device)
|
||||
input_global_scale = torch.ones(
|
||||
(num_experts,), dtype=torch.float32, device=hidden_states.device
|
||||
)
|
||||
|
||||
w1_global_scale = FLOAT8_E4M3_MAX * FLOAT4_E2M1_MAX / w1_amax
|
||||
w2_global_scale = FLOAT8_E4M3_MAX * FLOAT4_E2M1_MAX / w2_amax
|
||||
a2_global_scale = torch.ones(
|
||||
(num_experts,), dtype=torch.float32, device=hidden_states.device
|
||||
) # assume intermediate scale is 1.0
|
||||
|
||||
w1_fp4, w1_blockscale = scaled_fp4_grouped_quant(
|
||||
w1,
|
||||
w1_global_scale,
|
||||
torch.ones(num_experts, dtype=torch.int32, device=w1.device) * 2 * inter_dim,
|
||||
)
|
||||
w2_fp4, w2_blockscale = scaled_fp4_grouped_quant(
|
||||
w2,
|
||||
w2_global_scale,
|
||||
torch.ones(num_experts, dtype=torch.int32, device=w2.device) * hidden_dim,
|
||||
)
|
||||
|
||||
w1_alpha = 1.0 / (input_global_scale * w1_global_scale)
|
||||
w2_alpha = 1.0 / (a2_global_scale * w2_global_scale)
|
||||
|
||||
out = flashinfer_cutedsl_moe_masked(
|
||||
hidden_states_3d.to(hidden_states.device),
|
||||
input_global_scale,
|
||||
w1_fp4.permute(2, 0, 1),
|
||||
w1_blockscale,
|
||||
w1_alpha,
|
||||
w2_fp4.permute(2, 0, 1),
|
||||
a2_global_scale,
|
||||
w2_blockscale,
|
||||
w2_alpha,
|
||||
masked_m.to(hidden_states.device),
|
||||
)
|
||||
|
||||
# reference
|
||||
a_fp4, a_scale_interleaved = fp4_quantize(hidden_states, input_global_scale)
|
||||
a_in_dtype = dequantize_nvfp4_to_dtype(
|
||||
a_fp4,
|
||||
a_scale_interleaved,
|
||||
input_global_scale,
|
||||
dtype=hidden_states.dtype,
|
||||
device=hidden_states.device,
|
||||
block_size=16,
|
||||
)
|
||||
w1_d = torch.empty(
|
||||
(num_experts, 2 * inter_dim, hidden_dim), device=w1.device, dtype=w1.dtype
|
||||
)
|
||||
w2_d = torch.empty(
|
||||
(num_experts, hidden_dim, inter_dim), device=w2.device, dtype=w2.dtype
|
||||
)
|
||||
|
||||
for idx in range(0, num_experts):
|
||||
w1_fp4_sliced, w1_blockscale_sliced = fp4_quantize(
|
||||
w1[idx], w1_global_scale[idx]
|
||||
)
|
||||
w2_fp4_sliced, w2_blockscale_sliced = fp4_quantize(
|
||||
w2[idx], w2_global_scale[idx]
|
||||
)
|
||||
w1_d[idx] = dequantize_nvfp4_to_dtype(
|
||||
w1_fp4_sliced,
|
||||
w1_blockscale_sliced,
|
||||
w1_global_scale[idx],
|
||||
dtype=w1.dtype,
|
||||
device=w1.device,
|
||||
block_size=16,
|
||||
)
|
||||
w2_d[idx] = dequantize_nvfp4_to_dtype(
|
||||
w2_fp4_sliced,
|
||||
w2_blockscale_sliced,
|
||||
w2_global_scale[idx],
|
||||
dtype=w2.dtype,
|
||||
device=w2.device,
|
||||
block_size=16,
|
||||
)
|
||||
|
||||
ref_output = torch_moe_nvfp4(
|
||||
a_in_dtype,
|
||||
w1_d,
|
||||
w2_d,
|
||||
topk,
|
||||
routing_weights.to(a_in_dtype.device),
|
||||
topk_idx.to(a_in_dtype.device),
|
||||
)
|
||||
out_weighted = torch.zeros_like(ref_output, device=out.device, dtype=out.dtype)
|
||||
|
||||
positions = torch.nonzero(masked_m[topk_idx], as_tuple=False)
|
||||
rows, cols = positions[:, 0], positions[:, 1]
|
||||
experts = topk_idx[rows, cols]
|
||||
for i in range(num_experts):
|
||||
mask = experts == i
|
||||
if mask.any():
|
||||
idx = torch.nonzero(mask, as_tuple=False).squeeze(-1)
|
||||
r, c = rows[idx], cols[idx]
|
||||
out_weighted[r] += out[i, : len(r), :] * routing_weights[r, c].to(
|
||||
out.device
|
||||
).unsqueeze(-1)
|
||||
torch.testing.assert_close(
|
||||
out_weighted.cpu(), ref_output.cpu(), atol=5e-2, rtol=5e-2
|
||||
)
|
||||
|
||||
|
||||
@pytest.mark.parametrize(
|
||||
"bs, hidden_dim, inter_dim, topk", [(2, 128, 256, 2), (16, 128, 512, 5)]
|
||||
)
|
||||
@torch.inference_mode()
|
||||
def test_grouped_gemm_nt_masked(
|
||||
bs: int, hidden_dim: int, inter_dim: int, topk: int
|
||||
) -> None:
|
||||
torch.manual_seed(42)
|
||||
B = bs
|
||||
D = hidden_dim
|
||||
N = inter_dim
|
||||
num_experts = 8
|
||||
hidden_states = torch.randn(B, D, dtype=torch.bfloat16, device="cuda")
|
||||
weights = torch.randn(num_experts, N, D, dtype=torch.bfloat16, device="cuda")
|
||||
router_logits = torch.randn(B, num_experts, dtype=torch.float32)
|
||||
|
||||
hidden_states_expanded = (
|
||||
hidden_states.view(B, -1, D).repeat(1, topk, 1).reshape(-1, D)
|
||||
)
|
||||
hidden_states_3d, masked_m, topk_idx, _ = prepare_inputs(
|
||||
hidden_states_expanded, router_logits, num_experts, topk
|
||||
)
|
||||
|
||||
# reference
|
||||
out = torch.zeros(
|
||||
(B * topk, weights.shape[1]), dtype=weights.dtype, device=weights.device
|
||||
)
|
||||
for i in range(num_experts):
|
||||
mask = topk_idx.view(-1) == i
|
||||
if mask.sum():
|
||||
lhs = hidden_states_expanded[mask]
|
||||
rhs = weights[i]
|
||||
a_amax = lhs.abs().max().to(torch.float32).to(hidden_states.device)
|
||||
b_amax = rhs.abs().amax().to(torch.float32).to(weights.device)
|
||||
a_gs = FLOAT8_E4M3_MAX * FLOAT4_E2M1_MAX / a_amax
|
||||
b_gs = FLOAT8_E4M3_MAX * FLOAT4_E2M1_MAX / b_amax
|
||||
|
||||
lhsq, lhsq_sf = fp4_quantize(
|
||||
lhs,
|
||||
a_gs,
|
||||
)
|
||||
rhsq, rhsq_sf = fp4_quantize(
|
||||
rhs,
|
||||
b_gs,
|
||||
)
|
||||
|
||||
lhs_in_dtype = dequantize_nvfp4_to_dtype(
|
||||
lhsq,
|
||||
lhsq_sf,
|
||||
a_gs,
|
||||
dtype=hidden_states.dtype,
|
||||
device=hidden_states.device,
|
||||
block_size=16,
|
||||
)
|
||||
|
||||
rhs_in_dtype = dequantize_nvfp4_to_dtype(
|
||||
rhsq,
|
||||
rhsq_sf,
|
||||
b_gs,
|
||||
dtype=hidden_states.dtype,
|
||||
device=hidden_states.device,
|
||||
block_size=16,
|
||||
)
|
||||
out[mask] = lhs_in_dtype @ rhs_in_dtype.t()
|
||||
|
||||
a_amax = (
|
||||
hidden_states_3d.abs()
|
||||
.amax(dim=(1, 2))
|
||||
.to(torch.float32)
|
||||
.to(hidden_states.device)
|
||||
)
|
||||
b_amax = weights.abs().amax(dim=(1, 2)).to(torch.float32).to(weights.device)
|
||||
a_gs = FLOAT8_E4M3_MAX * FLOAT4_E2M1_MAX / a_amax
|
||||
b_gs = FLOAT8_E4M3_MAX * FLOAT4_E2M1_MAX / b_amax
|
||||
out_flashinfer = flashinfer_cutedsl_grouped_gemm_nt_masked(
|
||||
hidden_states_3d.to(hidden_states.device), a_gs, weights, b_gs, masked_m
|
||||
)
|
||||
|
||||
# re-pack out into [num_experts, max_m, n]
|
||||
out_ref = torch.zeros(
|
||||
(num_experts, max(masked_m), weights.shape[1]), dtype=out.dtype
|
||||
)
|
||||
expert_slot = [0] * num_experts
|
||||
for i, expert_id in enumerate(topk_idx.view(-1).tolist()):
|
||||
out_ref[expert_id, expert_slot[expert_id], :] = out[i]
|
||||
expert_slot[expert_id] += 1
|
||||
|
||||
# Note: just to compare the masked position due to cutedsl may write nan
|
||||
# into unmasked position.
|
||||
for i in range(num_experts):
|
||||
torch.testing.assert_close(
|
||||
out_flashinfer.permute(2, 0, 1)[i, : masked_m[i]],
|
||||
out_ref.to(out_flashinfer.device)[i, : masked_m[i]],
|
||||
atol=1e-1,
|
||||
rtol=5e-2,
|
||||
)
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
test_cutlass_fp4_moe_no_graph(224, 1024, 1024, 256, 8, torch.half)
|
||||
test_flashinfer_fp4_moe_no_graph(224, 1024, 1024, 256, 8, torch.half)
|
||||
test_flashinfer_cutedsl_moe_masked(16, 128, 512, 4)
|
||||
test_grouped_gemm_nt_masked(16, 128, 512, 4)
|
||||
Reference in New Issue
Block a user