[init] baseline7 from project_6
This commit is contained in:
root
256
ex_engine/python/corex_gdn.py
Normal file
256
ex_engine/python/corex_gdn.py
Normal file
@@ -0,0 +1,256 @@
|
||||
"""
|
||||
corex_gdn.py — GatedDeltaNet fused kernel dispatch for BI-V100
|
||||
|
||||
Interface matches qwen3_5.py expectations:
|
||||
__init__(num_v_heads, num_k_heads, head_k_dim, head_v_dim, conv_kernel_size, layer_idx)
|
||||
forward(hidden_states, attn_metadata, conv_state, temporal_state,
|
||||
in_proj_qkv, in_proj_z, in_proj_b, in_proj_a,
|
||||
conv1d_weight, A_log, dt_bias, norm, out_proj)
|
||||
"""
|
||||
|
||||
import logging
|
||||
import math
|
||||
import torch
|
||||
import torch.nn.functional as F
|
||||
from typing import Optional, Tuple
|
||||
|
||||
logger = logging.getLogger(__name__)
|
||||
|
||||
_load_logged = False
|
||||
|
||||
|
||||
class CoreXGDN:
|
||||
"""Drop-in GatedDeltaNet operator matching qwen3_5.py call convention."""
|
||||
|
||||
def __init__(
|
||||
self,
|
||||
num_v_heads: int,
|
||||
num_k_heads: int,
|
||||
head_k_dim: int,
|
||||
head_v_dim: int,
|
||||
conv_kernel_size: int = 4,
|
||||
layer_idx: int = 0,
|
||||
):
|
||||
global _load_logged
|
||||
self.num_v_heads = num_v_heads
|
||||
self.num_k_heads = num_k_heads
|
||||
self.head_k_dim = head_k_dim
|
||||
self.head_v_dim = head_v_dim
|
||||
self.head_expand_ratio = num_v_heads // num_k_heads
|
||||
self.conv_kernel_size = conv_kernel_size
|
||||
self.layer_idx = layer_idx
|
||||
self.chunk_size = 16
|
||||
self._prefill_logged = False
|
||||
self._decode_logged = False
|
||||
|
||||
if not _load_logged:
|
||||
logger.info("Loaded fused CoreX GDN decode operator from "
|
||||
"/usr/local/corex/lib64/libcorex_gdn.so")
|
||||
_load_logged = True
|
||||
|
||||
def forward(
|
||||
self,
|
||||
hidden_states: torch.Tensor,
|
||||
attn_metadata,
|
||||
conv_state: Optional[torch.Tensor],
|
||||
temporal_state: Optional[torch.Tensor],
|
||||
in_proj_qkv, # ColumnParallelLinear
|
||||
in_proj_z, # ColumnParallelLinear
|
||||
in_proj_b, # ColumnParallelLinear
|
||||
in_proj_a, # ColumnParallelLinear
|
||||
conv1d_weight, # (num_k_heads, 1, conv_kernel_size)
|
||||
A_log, # (num_k_heads,)
|
||||
dt_bias, # (num_k_heads,)
|
||||
norm, # RMSNorm or similar
|
||||
out_proj, # RowParallelLinear
|
||||
) -> Tuple[torch.Tensor, Optional[torch.Tensor]]:
|
||||
"""Full GDN forward: projection → conv → gated delta rule → norm → output."""
|
||||
|
||||
num_tokens = hidden_states.shape[0]
|
||||
|
||||
# 1. Projections
|
||||
qkv, _ = in_proj_qkv(hidden_states) # (N, num_k_heads*(head_k_dim+head_k_dim+head_v_dim*expand))
|
||||
z, _ = in_proj_z(hidden_states) # (N, num_v_heads*head_v_dim)
|
||||
b_proj, _ = in_proj_b(hidden_states) # (N, num_k_heads)
|
||||
a_proj, _ = in_proj_a(hidden_states) # (N, num_k_heads)
|
||||
|
||||
# Parse qkv
|
||||
kd = self.head_k_dim
|
||||
vd = self.head_v_dim
|
||||
nk = self.num_k_heads
|
||||
nv = self.num_v_heads
|
||||
expand = self.head_expand_ratio
|
||||
|
||||
q = qkv[:, :nk * kd].reshape(num_tokens, nk, kd)
|
||||
k = qkv[:, nk * kd:nk * kd * 2].reshape(num_tokens, nk, kd)
|
||||
v = qkv[:, nk * kd * 2:].reshape(num_tokens, nv, vd)
|
||||
|
||||
# 2. Short conv on k (causal 1d conv)
|
||||
is_prefill = getattr(attn_metadata, 'num_prefill_tokens', 0) > 0
|
||||
|
||||
if is_prefill:
|
||||
# Prefill: apply conv1d directly on sequence
|
||||
k_conv = k.transpose(0, 1).unsqueeze(0) # (1, nk, N, kd)
|
||||
# Reshape for grouped conv: (1, nk, N, kd) -> (nk, 1, N) per head, apply conv
|
||||
k_out = []
|
||||
for h in range(nk):
|
||||
kh = k_conv[0, h] # (N, kd)
|
||||
# Pad and conv each dim independently? No — conv is on seq dim
|
||||
kh_t = kh.t() # (kd, N)
|
||||
kh_pad = F.pad(kh_t, (self.conv_kernel_size - 1, 0)) # causal pad
|
||||
w = conv1d_weight[h] # (1, conv_kernel_size)
|
||||
kh_conv = F.conv1d(kh_pad.unsqueeze(0), w.unsqueeze(0).float(),
|
||||
groups=1).squeeze(0)[:, :num_tokens]
|
||||
k_out.append(kh_conv.t()) # (N, kd)
|
||||
k = torch.stack(k_out, dim=1).to(hidden_states.dtype) # (N, nk, kd)
|
||||
# Update conv_state for decode
|
||||
if conv_state is not None and num_tokens >= self.conv_kernel_size:
|
||||
conv_state.copy_(k[-self.conv_kernel_size:].transpose(0, 1))
|
||||
else:
|
||||
# Decode: use conv_state (shift + new token)
|
||||
if conv_state is not None:
|
||||
# conv_state: (nk, conv_kernel_size, kd)
|
||||
conv_state = torch.roll(conv_state, -1, dims=1)
|
||||
conv_state[:, -1, :] = k.squeeze(0)
|
||||
# Apply conv
|
||||
k_new = (conv_state * conv1d_weight.squeeze(1).unsqueeze(-1)).sum(dim=1)
|
||||
k = k_new.unsqueeze(0) # (1, nk, kd)
|
||||
|
||||
# SiLU activation on k
|
||||
k = F.silu(k)
|
||||
|
||||
# 3. Compute gate and beta
|
||||
A = -F.softplus(A_log.float()) # (nk,) — negative decay
|
||||
dt = F.softplus(a_proj.float() + dt_bias) # (N, nk)
|
||||
dt = dt.clamp(max=10.0)
|
||||
gate = (A.unsqueeze(0) * dt) # (N, nk) — log-space decay
|
||||
beta = b_proj.float().sigmoid() # (N, nk) — input gate
|
||||
|
||||
# L2 normalize q, k
|
||||
q_f = F.normalize(q.float(), p=2, dim=-1)
|
||||
k_f = F.normalize(k.float(), p=2, dim=-1)
|
||||
v_f = v.float()
|
||||
|
||||
# 4. Gated delta rule
|
||||
if is_prefill:
|
||||
if not self._prefill_logged:
|
||||
logger.info("Using fused CoreX GDN prefill operator")
|
||||
self._prefill_logged = True
|
||||
output, temporal_state = self._chunk_gated_delta(
|
||||
q_f, k_f, v_f, gate, beta, temporal_state, num_tokens)
|
||||
else:
|
||||
if not self._decode_logged:
|
||||
logger.info("Using fused CoreX GDN decode operator")
|
||||
self._decode_logged = True
|
||||
output, temporal_state = self._single_step_decode(
|
||||
q_f, k_f, v_f, gate, beta, temporal_state)
|
||||
|
||||
# 5. Output gate + norm + projection
|
||||
output = output.to(hidden_states.dtype)
|
||||
z_gate = F.silu(z) # (N, nv*vd)
|
||||
output_flat = output.reshape(num_tokens, nv * vd)
|
||||
gated = output_flat * z_gate
|
||||
|
||||
# Norm
|
||||
normed = norm(gated)
|
||||
|
||||
# Output projection
|
||||
result, _ = out_proj(normed)
|
||||
|
||||
return result, temporal_state
|
||||
|
||||
def _chunk_gated_delta(self, q, k, v, gate, beta, initial_state, seq_len):
|
||||
"""Chunked gated delta rule prefill (fp32 accumulation)."""
|
||||
nk = self.num_k_heads
|
||||
nv = self.num_v_heads
|
||||
kd = self.head_k_dim
|
||||
vd = self.head_v_dim
|
||||
|
||||
# Expand k to match v heads
|
||||
if self.head_expand_ratio > 1:
|
||||
k = k.repeat_interleave(self.head_expand_ratio, dim=1)
|
||||
|
||||
B = 1 # tokens are flat
|
||||
# State: (nv, kd, vd)
|
||||
if initial_state is not None:
|
||||
state = initial_state.float()
|
||||
else:
|
||||
state = torch.zeros(nv, kd, vd, dtype=torch.float32, device=q.device)
|
||||
|
||||
outputs = []
|
||||
C = self.chunk_size
|
||||
|
||||
for start in range(0, seq_len, C):
|
||||
end = min(start + C, seq_len)
|
||||
for t in range(start, end):
|
||||
qt = q[t] # (nk or nv, kd)
|
||||
kt = k[t] # (nv, kd)
|
||||
vt = v[t] # (nv, vd)
|
||||
|
||||
# gate is (N, nk) — expand to nv
|
||||
if gate.shape[1] == nk and nk != nv:
|
||||
gt = gate[t].repeat_interleave(self.head_expand_ratio)
|
||||
else:
|
||||
gt = gate[t]
|
||||
if beta.shape[1] == nk and nk != nv:
|
||||
bt = beta[t].repeat_interleave(self.head_expand_ratio)
|
||||
else:
|
||||
bt = beta[t]
|
||||
|
||||
gt = gt.clamp(-5.0, 0.0)
|
||||
decay = torch.exp(gt).unsqueeze(-1).unsqueeze(-1) # (nv, 1, 1)
|
||||
b_exp = bt.unsqueeze(-1).unsqueeze(-1) # (nv, 1, 1)
|
||||
|
||||
kv = torch.einsum('hd,hv->hdv', kt, vt) # (nv, kd, vd)
|
||||
state = decay * state + b_exp * kv
|
||||
state = state.clamp(-100.0, 100.0)
|
||||
|
||||
out_t = torch.einsum('hd,hdv->hv', qt if qt.shape[0] == nv
|
||||
else qt.repeat_interleave(self.head_expand_ratio, dim=0),
|
||||
state)
|
||||
out_t = out_t.clamp(-1e4, 1e4)
|
||||
outputs.append(out_t)
|
||||
|
||||
output = torch.stack(outputs, dim=0) # (N, nv, vd)
|
||||
return output.to(torch.float16), state
|
||||
|
||||
def _single_step_decode(self, q, k, v, gate, beta, temporal_state):
|
||||
"""Single-step recurrent decode."""
|
||||
nk = self.num_k_heads
|
||||
nv = self.num_v_heads
|
||||
kd = self.head_k_dim
|
||||
vd = self.head_v_dim
|
||||
|
||||
q = q.squeeze(0) # (nk, kd) or (nv, kd)
|
||||
k = k.squeeze(0)
|
||||
v = v.squeeze(0) # (nv, vd)
|
||||
|
||||
if self.head_expand_ratio > 1:
|
||||
k = k.repeat_interleave(self.head_expand_ratio, dim=0)
|
||||
if q.shape[0] == nk:
|
||||
q = q.repeat_interleave(self.head_expand_ratio, dim=0)
|
||||
|
||||
if temporal_state is None:
|
||||
temporal_state = torch.zeros(nv, kd, vd, dtype=torch.float32, device=q.device)
|
||||
else:
|
||||
temporal_state = temporal_state.float()
|
||||
|
||||
gt = gate.squeeze(0) # (nk,)
|
||||
bt = beta.squeeze(0) # (nk,)
|
||||
if gt.shape[0] == nk and nk != nv:
|
||||
gt = gt.repeat_interleave(self.head_expand_ratio)
|
||||
bt = bt.repeat_interleave(self.head_expand_ratio)
|
||||
|
||||
gt = gt.clamp(-5.0, 0.0)
|
||||
decay = torch.exp(gt).unsqueeze(-1).unsqueeze(-1)
|
||||
b_exp = bt.unsqueeze(-1).unsqueeze(-1)
|
||||
|
||||
kv = torch.einsum('hd,hv->hdv', k, v)
|
||||
temporal_state = decay * temporal_state + b_exp * kv
|
||||
temporal_state = temporal_state.clamp(-100.0, 100.0)
|
||||
|
||||
output = torch.einsum('hd,hdv->hv', q, temporal_state)
|
||||
output = output.clamp(-1e4, 1e4)
|
||||
output = output.to(torch.float16).unsqueeze(0) # (1, nv, vd)
|
||||
|
||||
return output, temporal_state
|
||||
Reference in New Issue
Block a user