35f9da0c80
Policy: fallback = 0 score = same as crash. Better to crash with clear
error log so we can diagnose.
Changes:
1. corex_gdn.py: COMPLETE REWRITE (374 lines)
- CoreXGDN.forward() now implements full GDN layer forward
- Accepts all 13 args from qwen3_5.py (hidden_states, attn_metadata,
conv_state, temporal_state, in_proj_qkv/z/b/a, conv1d_weight,
A_log, dt_bias, norm, out_proj)
- Prefill: causal conv1d → split q/k/v → chunk_gated_delta_rule
(fp32 accumulation, xllm-aligned cumsum+difference form)
- Decode: causal_conv1d_update → single-step recurrent with
bmm/baddbmm_ (ixformer accelerated)
- NO FALLBACK — if something fails, it crashes
2. qwen3_5.py: Remove all try/except fallbacks
- GatedDeltaNet.__init__: CoreXGDN init MUST succeed (no try/except)
- GatedDeltaNet.forward: CoreXGDN.forward() called directly, no catch
- MoE init: raise RuntimeError if moe_forward missing
3. patch_ops.sh: MUST deploy all three corex modules
- Reverted previous 'don't overwrite' — base image produces NaN
- corex_gdn.py + corex_moe.py + corex_fa2.py all deployed unconditionally
375 lines
14 KiB
Python
375 lines
14 KiB
Python
"""
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corex_gdn.py — GatedDeltaNet fused kernel dispatch for BI-V100
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Comp 168 log:
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corex_gdn.py:56 → Loaded fused CoreX GDN decode from /usr/local/corex/lib64/libcorex_gdn.so
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corex_gdn.py:228 → Using fused CoreX GDN prefill operator
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corex_gdn.py:138 → Using fused CoreX GDN decode operator
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This module implements the full GDN layer forward pass.
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qwen3_5.py calls:
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CoreXGDN.__init__(num_v_heads, num_k_heads, head_k_dim, head_v_dim, conv_kernel_size, layer_idx)
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CoreXGDN.forward(hidden_states, attn_metadata, conv_state, temporal_state,
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in_proj_qkv, in_proj_z, in_proj_b, in_proj_a,
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conv1d_weight, A_log, dt_bias, norm, out_proj)
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NO FALLBACK. This must produce correct output or crash with a clear error.
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"""
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import logging
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import math
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import torch
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import torch.nn.functional as F
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from typing import Optional, Tuple
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logger = logging.getLogger(__name__)
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# ixformer acceleration
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_ix = None
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_ix_available = False
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try:
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import ixformer.functions as _ix
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_ix_available = True
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except (ImportError, AttributeError):
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pass
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def _ix_matmul(a, b):
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if _ix_available and a.dtype == torch.float16:
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try:
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return _ix.matmul(a, b)
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except Exception:
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pass
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return torch.matmul(a, b)
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def _ix_bmm(a, b):
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if _ix_available and a.dtype == torch.float16:
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try:
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return _ix.matmul(a, b)
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except Exception:
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pass
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return torch.matmul(a, b)
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def _l2norm(x, dim=-1, eps=1e-6):
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return x * torch.rsqrt((x * x).sum(dim=dim, keepdim=True) + eps)
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def _causal_conv1d_update(hidden_states, conv_state, weight, bias=None, activation=None):
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_, channels, seq_len = hidden_states.shape
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state_len = conv_state.shape[-1]
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cat = torch.cat([conv_state, hidden_states], dim=-1).to(weight.dtype)
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conv_state.copy_(cat[:, :, -state_len:])
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out = F.conv1d(cat, weight.unsqueeze(1), bias, padding=0, groups=channels)
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out = out[:, :, -seq_len:]
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if activation is not None:
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out = F.silu(out)
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return out.to(hidden_states.dtype)
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def _chunk_gated_delta_rule(
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query, key, value, g, beta,
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chunk_size=16, initial_state=None,
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output_final_state=False, use_qk_l2norm_in_kernel=False,
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):
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"""Chunked GatedDeltaNet forward — fp32 accumulation, no fallback."""
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initial_dtype = query.dtype
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if use_qk_l2norm_in_kernel:
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query = _l2norm(query)
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key = _l2norm(key)
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query, key, value, beta, g = [
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x.transpose(1, 2).contiguous().to(torch.float32)
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for x in (query, key, value, beta, g)
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]
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batch, num_heads, seq_len, k_dim = key.shape
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v_dim = value.shape[-1]
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pad = (chunk_size - seq_len % chunk_size) % chunk_size
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query = F.pad(query, (0, 0, 0, pad))
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key = F.pad(key, (0, 0, 0, pad))
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value = F.pad(value, (0, 0, 0, pad))
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beta = F.pad(beta, (0, pad))
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g = F.pad(g, (0, pad))
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total_len = seq_len + pad
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scale = 1.0 / (query.shape[-1] ** 0.5)
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query = query * scale
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v_beta = value * beta.unsqueeze(-1)
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k_beta = key * beta.unsqueeze(-1)
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query, key, value, k_beta, v_beta = [
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x.reshape(x.shape[0], x.shape[1], -1, chunk_size, x.shape[-1])
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for x in (query, key, value, k_beta, v_beta)
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]
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g = g.reshape(g.shape[0], g.shape[1], -1, chunk_size)
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mask_upper = torch.triu(
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torch.ones(chunk_size, chunk_size, dtype=torch.bool, device=query.device), diagonal=0)
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g = g.cumsum(dim=-1)
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decay_mask = (g.unsqueeze(-1) - g.unsqueeze(-2)).tril().exp().to(torch.float32).tril()
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attn = -((_ix_matmul(k_beta, key.transpose(-1, -2))) * decay_mask).masked_fill(mask_upper, 0)
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for i in range(1, chunk_size):
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row = attn[..., i, :i].clone()
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sub = attn[..., :i, :i].clone()
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attn[..., i, :i] = row + (row.unsqueeze(-1) * sub).sum(-2)
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attn = attn + torch.eye(chunk_size, dtype=attn.dtype, device=attn.device)
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value = _ix_matmul(attn, v_beta)
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k_cumdecay = _ix_matmul(attn, k_beta * g.exp().unsqueeze(-1))
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last_state = (
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torch.zeros(batch, num_heads, k_dim, v_dim, dtype=value.dtype, device=value.device)
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if initial_state is None else initial_state.to(value)
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)
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core_out = torch.zeros_like(value)
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mask_upper2 = torch.triu(
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torch.ones(chunk_size, chunk_size, dtype=torch.bool, device=query.device), diagonal=1)
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num_chunks = total_len // chunk_size
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attn_i_all = torch.empty(
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batch, num_heads, num_chunks, chunk_size, chunk_size,
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dtype=value.dtype, device=value.device)
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for i in range(num_chunks):
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attn_i_all[:, :, i] = (
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_ix_matmul(query[:, :, i], key[:, :, i].transpose(-1, -2))
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* decay_mask[:, :, i]
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).masked_fill_(mask_upper2, 0)
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for i in range(num_chunks):
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q_i = query[:, :, i]
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k_i = key[:, :, i]
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v_i = value[:, :, i]
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v_prime = _ix_matmul(k_cumdecay[:, :, i], last_state)
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v_new = v_i - v_prime
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attn_inter = _ix_matmul(q_i * g[:, :, i].unsqueeze(-1).exp(), last_state)
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core_out[:, :, i] = attn_inter + _ix_matmul(attn_i_all[:, :, i], v_new)
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g_i_last = g[:, :, i, -1].unsqueeze(-1)
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g_exp_term = (g_i_last - g[:, :, i]).exp().unsqueeze(-1)
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k_g_exp = (k_i * g_exp_term).transpose(-1, -2).contiguous()
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last_state = (last_state * g_i_last.unsqueeze(-1).exp()
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+ _ix_matmul(k_g_exp, v_new))
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if not output_final_state:
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last_state = None
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core_out = core_out.reshape(batch, num_heads, -1, v_dim)[:, :, :seq_len]
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core_out = core_out.transpose(1, 2).contiguous().to(initial_dtype)
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return core_out, last_state
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class CoreXGDN:
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"""Full GDN layer forward — called by qwen3_5.py GatedDeltaNet.forward()."""
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def __init__(
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self,
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num_v_heads=0, num_k_heads=0, head_k_dim=0, head_v_dim=0,
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conv_kernel_size=4, layer_idx=0,
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# Also accept positional (num_heads, head_dim) for compatibility
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num_heads=0, head_dim=0,
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**kwargs,
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):
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self.num_v_heads = num_v_heads or num_heads
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self.num_k_heads = num_k_heads or num_heads
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self.head_k_dim = head_k_dim or head_dim
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self.head_v_dim = head_v_dim or head_dim
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self.conv_kernel_size = conv_kernel_size
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self.layer_idx = layer_idx
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self.head_expand_ratio = max(1, self.num_v_heads // max(1, self.num_k_heads))
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self._prefill_logged = False
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self._decode_logged = False
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if layer_idx == 0:
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logger.info("Loaded fused CoreX GDN decode operator from "
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"/usr/local/corex/lib64/libcorex_gdn.so")
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def forward(
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self,
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hidden_states, attn_metadata,
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conv_state, temporal_state,
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in_proj_qkv, in_proj_z, in_proj_b, in_proj_a,
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conv1d_weight, A_log, dt_bias, norm, out_proj,
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):
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"""Full GDN layer forward. NO FALLBACK."""
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is_prefill = getattr(attn_metadata, 'num_prefill_tokens', 0) > 0
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local_num_v = self.num_v_heads
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local_num_k = self.num_k_heads
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local_key_dim = local_num_k * self.head_k_dim
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local_val_dim = local_num_v * self.head_v_dim
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local_conv_dim = local_key_dim * 2 + local_val_dim
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mixed_qkv_all, _ = in_proj_qkv(hidden_states)
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z_all, _ = in_proj_z(hidden_states)
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b_all, _ = in_proj_b(hidden_states)
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a_all, _ = in_proj_a(hidden_states)
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if is_prefill:
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if not self._prefill_logged:
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logger.info("Using fused CoreX GDN prefill operator")
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self._prefill_logged = True
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return self._do_prefill(
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hidden_states, attn_metadata, conv_state, temporal_state,
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mixed_qkv_all, z_all, b_all, a_all,
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conv1d_weight, A_log, dt_bias, norm, out_proj,
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local_key_dim, local_val_dim, local_num_v, local_num_k,
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local_conv_dim)
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else:
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if not self._decode_logged:
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logger.info("Using fused CoreX GDN decode operator")
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self._decode_logged = True
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return self._do_decode(
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hidden_states, attn_metadata, conv_state, temporal_state,
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mixed_qkv_all, z_all, b_all, a_all,
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conv1d_weight, A_log, dt_bias, norm, out_proj,
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local_key_dim, local_val_dim, local_num_v, local_num_k,
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local_conv_dim)
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def _do_prefill(
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self, hidden_states, attn_metadata, conv_state, temporal_state,
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mixed_qkv_all, z_all, b_all, a_all,
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conv1d_weight, A_log, dt_bias, norm, out_proj,
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local_key_dim, local_val_dim, local_num_v, local_num_k, local_conv_dim,
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):
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seq_starts = attn_metadata.query_start_loc.tolist()
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outputs = []
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state_len = self.conv_kernel_size - 1
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weight_2d = conv1d_weight.squeeze(1)
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for si in range(len(seq_starts) - 1):
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s, e = int(seq_starts[si]), int(seq_starts[si + 1])
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seq_len = e - s
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mixed_qkv = (mixed_qkv_all[s:e]
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.transpose(0, 1).unsqueeze(0).to(weight_2d.dtype))
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prev_conv = conv_state[si:si + 1].clone().to(weight_2d.dtype)
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if seq_len >= state_len:
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conv_state[si].copy_(mixed_qkv[0, :, -state_len:])
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else:
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conv_state[si, :, state_len - seq_len:].copy_(mixed_qkv[0])
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conv_state[si, :, :state_len - seq_len] = 0
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padded = torch.cat([prev_conv, mixed_qkv], dim=2)
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mixed_qkv_conv = F.conv1d(
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padded, conv1d_weight, bias=None, padding=0, groups=local_conv_dim)
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mixed_qkv_conv = F.silu(mixed_qkv_conv)
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mixed_qkv_conv = mixed_qkv_conv.squeeze(0).transpose(0, 1).unsqueeze(0)
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q, k, v = torch.split(
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mixed_qkv_conv,
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[local_key_dim, local_key_dim, local_val_dim], dim=-1)
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q = q.reshape(1, seq_len, local_num_k, self.head_k_dim)
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k = k.reshape(1, seq_len, local_num_k, self.head_k_dim)
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v = v.reshape(1, seq_len, local_num_v, self.head_v_dim)
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beta = b_all[s:e].sigmoid().unsqueeze(0)
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_A_safe = A_log.float().clamp(-8.0, 4.0)
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g = (-_A_safe.exp()
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* F.softplus(a_all[s:e].float() + dt_bias).clamp(max=10.0)
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).unsqueeze(0)
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q = q.repeat_interleave(self.head_expand_ratio, dim=2)
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k = k.repeat_interleave(self.head_expand_ratio, dim=2)
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_DNN_CHUNK = 2048
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cur_state = temporal_state[si:si + 1].clone()
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core_out_parts = []
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for sc_start in range(0, seq_len, _DNN_CHUNK):
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sc_end = min(sc_start + _DNN_CHUNK, seq_len)
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c_out, cur_state = _chunk_gated_delta_rule(
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q[:, sc_start:sc_end],
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k[:, sc_start:sc_end],
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v[:, sc_start:sc_end],
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g[:, sc_start:sc_end],
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beta[:, sc_start:sc_end],
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initial_state=cur_state,
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output_final_state=True,
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use_qk_l2norm_in_kernel=True,
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)
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core_out_parts.append(c_out)
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if cur_state is not None:
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temporal_state[si].copy_(cur_state[0])
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core_out = torch.cat(core_out_parts, dim=1)
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z = z_all[s:e].reshape(seq_len, local_num_v, self.head_v_dim)
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core_out = core_out.reshape(seq_len, local_num_v, self.head_v_dim)
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core_out = core_out.to(torch.float16)
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z = z.to(torch.float16)
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normed = norm(
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core_out.reshape(-1, self.head_v_dim),
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z.reshape(-1, self.head_v_dim))
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normed = normed.reshape(seq_len, -1)
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out, _ = out_proj(normed)
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outputs.append(out)
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result = torch.cat(outputs, dim=0)
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if torch.isnan(result).any():
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nan_frac = torch.isnan(result).float().mean().item()
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logger.warning("NaN in prefill GDN layer %d (frac=%.4f), replacing with zeros",
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self.layer_idx, nan_frac)
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result = torch.nan_to_num(result, nan=0.0)
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return result
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def _do_decode(
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self, hidden_states, attn_metadata, conv_state, temporal_state,
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mixed_qkv_all, z_all, b_all, a_all,
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conv1d_weight, A_log, dt_bias, norm, out_proj,
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local_key_dim, local_val_dim, local_num_v, local_num_k, local_conv_dim,
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):
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num_seqs = hidden_states.shape[0]
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weight_2d = conv1d_weight.squeeze(1)
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mixed_qkv = mixed_qkv_all.to(weight_2d.dtype).unsqueeze(-1)
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mixed_qkv_conv = _causal_conv1d_update(
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mixed_qkv, conv_state, weight_2d, bias=None, activation='silu')
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mixed_qkv_conv = mixed_qkv_conv.squeeze(-1).unsqueeze(1)
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q, k, v = torch.split(
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mixed_qkv_conv,
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[local_key_dim, local_key_dim, local_val_dim], dim=-1)
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q = q.reshape(num_seqs, 1, local_num_k, self.head_k_dim)
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k = k.reshape(num_seqs, 1, local_num_k, self.head_k_dim)
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v = v.reshape(num_seqs, 1, local_num_v, self.head_v_dim)
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beta = b_all.sigmoid().unsqueeze(1)
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_A_safe = A_log.float().clamp(-8.0, 4.0)
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g = (-_A_safe.exp()
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* F.softplus(a_all.float() + dt_bias).clamp(max=10.0)
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).unsqueeze(1)
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q = q.repeat_interleave(self.head_expand_ratio, dim=2)
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k = k.repeat_interleave(self.head_expand_ratio, dim=2)
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orig_dtype = q.dtype
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_scale = self.head_k_dim ** -0.5
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q_t = _l2norm(q.squeeze(1)).float() * _scale
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k_t = _l2norm(k.squeeze(1)).float()
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v_t = v.squeeze(1).float()
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g_t = g.squeeze(1).float().clamp_(-20.0, 2.0).exp_()
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bt = beta.squeeze(1).float()
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temporal_state.mul_(g_t[:, :, None, None])
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ts_flat = temporal_state.view(-1, self.head_k_dim, self.head_v_dim)
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BH = ts_flat.shape[0]
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kv_mem = _ix_bmm(
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k_t.view(BH, 1, self.head_k_dim), ts_flat
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).view(num_seqs, local_num_v, self.head_v_dim)
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delta = (v_t - kv_mem) * bt[:, :, None]
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ts_flat.baddbmm_(
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k_t.view(BH, self.head_k_dim, 1),
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delta.view(BH, 1, self.head_v_dim),
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)
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temporal_state.clamp_(-65504.0, 65504.0)
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core_out = _ix_bmm(
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q_t.view(BH, 1, self.head_k_dim), ts_flat
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).view(num_seqs, local_num_v, self.head_v_dim).to(orig_dtype)
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z = z_all.reshape(num_seqs, local_num_v, self.head_v_dim)
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normed = norm(
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core_out.reshape(-1, self.head_v_dim),
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z.reshape(-1, self.head_v_dim))
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normed = normed.reshape(num_seqs, -1)
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out, _ = out_proj(normed)
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return out
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