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from typing import Optional
import torch
from sgl_kernel import causal_conv1d_fwd
from sgl_kernel import causal_conv1d_update as causal_conv1d_update_kernel
PAD_SLOT_ID = -1
def causal_conv1d_fn(
x: torch.Tensor,
weight: torch.Tensor,
bias: Optional[torch.Tensor] = None,
query_start_loc: Optional[torch.Tensor] = None,
cache_indices: Optional[torch.Tensor] = None,
has_initial_state: Optional[torch.Tensor] = None,
conv_states: Optional[torch.Tensor] = None,
activation: Optional[str] = "silu",
pad_slot_id: int = PAD_SLOT_ID,
):
"""
x: (batch, dim, seqlen) or (dim,cu_seq_len) for varlen
sequences are concatenated from left to right for varlen
weight: (dim, width)
bias: (dim,)
query_start_loc: (batch + 1) int32
The cumulative sequence lengths of the sequences in
the batch, used to index into sequence. prepended by 0.
for example: query_start_loc = torch.Tensor([0,10,16,17]),
x.shape=(dim,17)
cache_indices: (batch) int32
indicates the corresponding state index,
like so: conv_state = conv_states[cache_indices[batch_id]]
has_initial_state: (batch) bool
indicates whether should the kernel take the current state as initial
state for the calculations
conv_states: (...,dim,width - 1) itype
updated inplace if provided
activation: either None or "silu" or "swish"
pad_slot_id: int
if cache_indices is passed, lets the kernel identify padded
entries that will not be processed,
for example: cache_indices = [pad_slot_id, 1, 20, pad_slot_id]
in this case, the kernel will not process entries at
indices 0 and 3
out: (batch, dim, seqlen)
"""
if activation not in [None, "silu", "swish"]:
raise NotImplementedError("activation must be None, silu, or swish")
if x.stride(-1) != 1:
x = x.contiguous()
bias = bias.contiguous() if bias is not None else None
causal_conv1d_fwd(
x,
weight,
bias,
conv_states,
query_start_loc,
cache_indices,
has_initial_state,
activation in ["silu", "swish"],
pad_slot_id,
)
return x
def causal_conv1d_update(
x: torch.Tensor,
conv_state: torch.Tensor,
weight: torch.Tensor,
bias: Optional[torch.Tensor] = None,
activation: Optional[str] = None,
cache_seqlens: Optional[torch.Tensor] = None,
conv_state_indices: Optional[torch.Tensor] = None,
pad_slot_id: int = PAD_SLOT_ID,
):
"""
x: (batch, dim) or (batch, dim, seqlen)
conv_state: (batch, dim, state_len), where state_len >= width - 1
weight: (dim, width)
bias: (dim,)
cache_seqlens: (batch,), dtype int32.
If not None, the conv_state is treated as a circular buffer.
The conv_state will be updated by copying x to the conv_state
starting at the index
@cache_seqlens % state_len.
conv_state_indices: (batch,), dtype int32
If not None, the conv_state is a larger tensor along the batch dim,
and we are selecting the batch coords specified by conv_state_indices.
Useful for a continuous batching scenario.
pad_slot_id: int
if cache_indices is passed, lets the kernel identify padded
entries that will not be processed,
for example: cache_indices = [pad_slot_id, 1 ,20 ,pad_slot_id]
in this case, the kernel will not process entries at
indices 0 and 3
out: (batch, dim) or (batch, dim, seqlen)
"""
if activation not in [None, "silu", "swish"]:
raise NotImplementedError(
f"activation must be None, silu, or swish, actual: {activation}"
)
activation_val = activation in ["silu", "swish"]
unsqueeze = x.dim() == 2
if unsqueeze:
x = x.unsqueeze(-1)
causal_conv1d_update_kernel(
x,
conv_state,
weight,
bias,
activation_val,
cache_seqlens,
conv_state_indices,
pad_slot_id,
)
if unsqueeze:
x = x.squeeze(-1)
return x
# SPDX-License-Identifier: Apache-2.0
from typing import Optional
import pytest
import torch
import torch.nn.functional as F
def causal_conv1d_ref(
x: torch.Tensor,
weight: torch.Tensor,
bias: Optional[torch.Tensor] = None,
initial_states: Optional[torch.Tensor] = None,
return_final_states: bool = False,
final_states_out: Optional[torch.Tensor] = None,
activation: Optional[str] = "silu",
):
"""
x: (batch, dim, seqlen)
weight: (dim, width)
bias: (dim,)
initial_states: (batch, dim, width - 1)
final_states_out: (batch, dim, width - 1)
out: (batch, dim, seqlen)
"""
if activation not in [None, "silu", "swish"]:
raise NotImplementedError("activation must be None, silu, or swish")
dtype_in = x.dtype
x = x.to(weight.dtype)
seqlen = x.shape[-1]
dim, width = weight.shape
if initial_states is None:
out = F.conv1d(x, weight.unsqueeze(1), bias, padding=width - 1, groups=dim)
else:
x = torch.cat([initial_states, x], dim=-1)
out = F.conv1d(x, weight.unsqueeze(1), bias, padding=0, groups=dim)
out = out[..., :seqlen]
if return_final_states:
final_states = F.pad(x, (width - 1 - x.shape[-1], 0)).to(
dtype_in
) # (batch, dim, width - 1)
if final_states_out is not None:
final_states_out.copy_(final_states)
else:
final_states_out = final_states
out = (out if activation is None else F.silu(out)).to(dtype=dtype_in)
return (out, None) if not return_final_states else (out, final_states_out)
def causal_conv1d_update_ref(
x, conv_state, weight, bias=None, activation=None, cache_seqlens=None
):
"""
x: (batch, dim) or (batch, dim, seqlen)
conv_state: (batch, dim, state_len), where state_len >= width - 1
weight: (dim, width)
bias: (dim,)
cache_seqlens: (batch,), dtype int32.
If not None, the conv_state is treated as a circular buffer.
The conv_state will be updated by copying x to the
conv_state starting at the index
@cache_seqlens % state_len before performing the convolution.
out: (batch, dim) or (batch, dim, seqlen)
"""
if activation not in [None, "silu", "swish"]:
raise NotImplementedError("activation must be None, silu, or swish")
dtype_in = x.dtype
unsqueeze = x.dim() == 2
if unsqueeze:
x = x.unsqueeze(-1)
batch, dim, seqlen = x.shape
width = weight.shape[1]
state_len = conv_state.shape[-1]
assert conv_state.shape == (batch, dim, state_len)
assert weight.shape == (dim, width)
if cache_seqlens is None:
x_new = torch.cat([conv_state, x], dim=-1).to(
weight.dtype
) # (batch, dim, state_len + seqlen)
conv_state.copy_(x_new[:, :, -state_len:])
else:
width_idx = torch.arange(
-(width - 1), 0, dtype=torch.long, device=x.device
).unsqueeze(0) + cache_seqlens.unsqueeze(1)
width_idx = (
torch.remainder(width_idx, state_len).unsqueeze(1).expand(-1, dim, -1)
)
x_new = torch.cat([conv_state.gather(2, width_idx), x], dim=-1).to(weight.dtype)
copy_idx = torch.arange(seqlen, dtype=torch.long, device=x.device).unsqueeze(
0
) + cache_seqlens.unsqueeze(1)
copy_idx = torch.remainder(copy_idx, state_len).unsqueeze(1).expand(-1, dim, -1)
conv_state.scatter_(2, copy_idx, x)
out = F.conv1d(x_new, weight.unsqueeze(1), bias, padding=0, groups=dim)[
:, :, -seqlen:
]
if unsqueeze:
out = out.squeeze(-1)
return (out if activation is None else F.silu(out)).to(dtype=dtype_in)
@pytest.mark.parametrize("itype", [torch.bfloat16, torch.float])
@pytest.mark.parametrize("silu_activation", [True])
@pytest.mark.parametrize("has_bias", [True])
@pytest.mark.parametrize("has_initial_state", [True, False])
@pytest.mark.parametrize("width", [4])
@pytest.mark.parametrize(
"seqlen", [1, 8, 16, 32, 64, 128, 256, 512, 784, 1024, 1025, 2048, 4096]
)
@pytest.mark.parametrize("dim", [64])
@pytest.mark.parametrize("batch", [1])
def test_causal_conv1d(
batch, dim, seqlen, width, has_bias, silu_activation, has_initial_state, itype
):
device = "cuda"
rtol, atol = (3e-4, 1e-3) if itype == torch.float32 else (3e-3, 5e-3)
if itype == torch.bfloat16:
rtol, atol = 1e-2, 5e-2
x = torch.randn(batch, dim, seqlen, device=device, dtype=itype).contiguous()
weight = torch.randn(dim, width, device=device, dtype=itype)
bias = torch.randn(dim, device=device, dtype=itype) if has_bias else None
if has_initial_state:
initial_states = torch.randn(batch, dim, width - 1, device=device, dtype=itype)
has_initial_state_tensor = torch.ones(batch, dtype=torch.bool, device=x.device)
else:
initial_states = None
has_initial_state_tensor = None
x_ref = x.clone()
weight_ref = weight.clone()
bias_ref = bias.clone() if bias is not None else None
initial_states_ref = initial_states.clone() if initial_states is not None else None
activation = None if not silu_activation else "silu"
out = causal_conv1d_fn(
x,
weight,
bias,
activation=activation,
conv_states=initial_states,
has_initial_state=has_initial_state_tensor,
)
out_ref, final_states_ref = causal_conv1d_ref(
x_ref,
weight_ref,
bias_ref,
initial_states=initial_states_ref,
return_final_states=True,
activation=activation,
)
if has_initial_state:
assert initial_states is not None and final_states_ref is not None
assert torch.allclose(initial_states, final_states_ref, rtol=rtol, atol=atol)
assert torch.allclose(out, out_ref, rtol=rtol, atol=atol)
@pytest.mark.parametrize("itype", [torch.bfloat16])
@pytest.mark.parametrize("silu_activation", [False, True])
@pytest.mark.parametrize("has_bias", [False, True])
@pytest.mark.parametrize("seqlen", [1])
@pytest.mark.parametrize("width", [4])
@pytest.mark.parametrize("dim", [2048, 2048 + 16, 4096])
def test_causal_conv1d_update(dim, width, seqlen, has_bias, silu_activation, itype):
device = "cuda"
rtol, atol = (3e-4, 1e-3) if itype == torch.float32 else (3e-3, 5e-3)
if itype == torch.bfloat16:
rtol, atol = 1e-2, 5e-2
batch = 2
x = torch.randn(batch, dim, seqlen, device=device, dtype=itype)
x_ref = x.clone()
conv_state = torch.randn(batch, dim, width - 1, device=device, dtype=itype)
weight = torch.randn(dim, width, device=device, dtype=itype)
bias = torch.randn(dim, device=device, dtype=itype) if has_bias else None
conv_state_ref = conv_state.detach().clone()
activation = None if not silu_activation else "silu"
out = causal_conv1d_update(x, conv_state, weight, bias, activation=activation)
out_ref = causal_conv1d_update_ref(
x_ref, conv_state_ref, weight, bias, activation=activation
)
assert torch.equal(conv_state, conv_state_ref)
assert torch.allclose(out, out_ref, rtol=rtol, atol=atol)
@pytest.mark.parametrize("itype", [torch.float32, torch.float16, torch.bfloat16])
@pytest.mark.parametrize("silu_activation", [False, True])
@pytest.mark.parametrize("has_bias", [False, True])
@pytest.mark.parametrize("seqlen", [1, 4, 5])
@pytest.mark.parametrize("width", [2, 3, 4])
@pytest.mark.parametrize("dim", [2048, 2048 + 16, 4096])
# tests correctness in case subset of the sequences are padded
@pytest.mark.parametrize("with_padding", [True, False])
def test_causal_conv1d_update_with_batch_gather(
with_padding, dim, width, seqlen, has_bias, silu_activation, itype
):
device = "cuda"
rtol, atol = (3e-4, 1e-3) if itype == torch.float32 else (3e-3, 5e-3)
if itype == torch.bfloat16:
rtol, atol = 1e-2, 5e-2
batch_size = 3
padding = 5 if with_padding else 0
padded_batch_size = batch_size + padding
total_entries = 10 * batch_size
x = torch.randn(padded_batch_size, dim, 1, device=device, dtype=itype)
x_ref = x.clone()
conv_state_indices = torch.randperm(total_entries)[:batch_size].to(
dtype=torch.int32, device=device
)
unused_states_bool = torch.ones(total_entries, dtype=torch.bool, device=device)
unused_states_bool[conv_state_indices] = False
padded_state_indices = torch.concat(
[
conv_state_indices,
torch.as_tensor([PAD_SLOT_ID] * padding, dtype=torch.int32, device=device),
],
dim=0,
)
conv_state = torch.randn(total_entries, dim, width - 1, device=device, dtype=itype)
conv_state_for_padding_test = conv_state.clone()
weight = torch.randn(dim, width, device=device, dtype=itype)
bias = torch.randn(dim, device=device, dtype=itype) if has_bias else None
conv_state_ref = conv_state[conv_state_indices, :].detach().clone()
activation = None if not silu_activation else "silu"
out = causal_conv1d_update(
x,
conv_state,
weight,
bias,
activation=activation,
conv_state_indices=padded_state_indices,
pad_slot_id=PAD_SLOT_ID,
)
out_ref = causal_conv1d_update_ref(
x_ref[:batch_size], conv_state_ref, weight, bias, activation=activation
)
assert torch.equal(conv_state[conv_state_indices, :], conv_state_ref)
assert torch.allclose(out[:batch_size], out_ref, rtol=rtol, atol=atol)
assert torch.equal(
conv_state[unused_states_bool], conv_state_for_padding_test[unused_states_bool]
)
@pytest.mark.parametrize("itype", [torch.bfloat16])
@pytest.mark.parametrize("silu_activation", [True])
@pytest.mark.parametrize("has_bias", [True])
@pytest.mark.parametrize("width", [4])
@pytest.mark.parametrize(
"seqlen", [8, 16, 32, 64, 128, 256, 512, 784, 1024, 2048, 2049, 4096]
)
@pytest.mark.parametrize("dim", [64, 4096])
# tests correctness in case subset of the sequences are padded
@pytest.mark.parametrize("with_padding", [True, False])
def test_causal_conv1d_varlen(
with_padding, dim, seqlen, width, has_bias, silu_activation, itype
):
device = "cuda"
torch.cuda.empty_cache()
rtol, atol = (3e-4, 1e-3) if itype == torch.float32 else (3e-3, 5e-3)
if itype == torch.bfloat16:
rtol, atol = 1e-2, 5e-2
seqlens = []
batch_size = 4
if seqlen < 10:
batch_size = 1
padding = 3 if with_padding else 0
padded_batch_size = batch_size + padding
nsplits = padded_batch_size - 1
eos_pos = torch.randperm(seqlen - 1)[:nsplits].sort().values
seqlens.append(
torch.diff(
torch.cat([torch.tensor([-1]), eos_pos, torch.tensor([seqlen - 1])])
).tolist()
)
assert sum(seqlens[-1]) == seqlen
assert all(s > 0 for s in seqlens[-1])
total_entries = batch_size * 10
cumsum = torch.cumsum(torch.tensor(seqlens[0]), dim=0).to(torch.int32)
cumsum = torch.concat([torch.tensor([0], dtype=torch.int32), cumsum], dim=0)
x = torch.randn(1, 4096 + dim + 64, seqlen, device=device, dtype=itype)[
:, 4096 : 4096 + dim, :
]
weight = torch.randn(dim, width, device=device, dtype=itype)
bias = torch.randn(dim, device=device, dtype=itype) if has_bias else None
x_ref = x.clone()
weight_ref = weight.clone()
bias_ref = bias.clone() if bias is not None else None
activation = None if not silu_activation else "silu"
final_states = torch.randn(
total_entries, dim, width - 1, device=x.device, dtype=x.dtype
)
final_states_ref = final_states.clone()
has_initial_states = torch.randint(
0, 2, (cumsum.shape[0] - 1,), dtype=torch.bool, device=x.device
)
state_indices = torch.randperm(total_entries, dtype=torch.int32, device=x.device)[
:batch_size
]
padded_state_indices = torch.concat(
[
state_indices,
torch.as_tensor([PAD_SLOT_ID] * padding, dtype=torch.int32, device=device),
],
dim=-1,
)
out = causal_conv1d_fn(
x.squeeze(0),
weight,
bias,
cumsum.cuda(),
padded_state_indices,
has_initial_states,
final_states,
activation,
PAD_SLOT_ID,
)
out_ref = []
out_ref_b = []
splits = [torch.split(var, seqlens[0], dim=-1) for var in (x_ref)]
for i in range(len(seqlens[0])):
x_s = [v[i].unsqueeze(0) for v in splits][0]
if padded_state_indices[i] == PAD_SLOT_ID:
continue
out_ref_b.append(
causal_conv1d_ref(
x_s,
weight_ref,
bias_ref,
activation=activation,
return_final_states=True,
final_states_out=final_states_ref[padded_state_indices[i]].unsqueeze(0),
initial_states=(
final_states_ref[padded_state_indices[i]].unsqueeze(0)
if has_initial_states[i]
else None
),
)
)
out_ref.append(torch.cat([t[0] for t in out_ref_b], dim=2))
out_ref_tensor = torch.cat(out_ref, dim=0)
unpadded_out = out[:, : out_ref_tensor.shape[-1]]
assert torch.allclose(unpadded_out, out_ref_tensor, rtol=rtol, atol=atol)
assert torch.allclose(
final_states[state_indices],
final_states_ref[state_indices],
rtol=rtol,
atol=atol,
)
if __name__ == "__main__":
pytest.main([__file__])
|