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Update simple_flash_attn_vit_3d.py #323

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Update simple_flash_attn_vit_3d.py #323

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13 changes: 8 additions & 5 deletions vit_pytorch/simple_flash_attn_vit_3d.py
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Original file line number Diff line number Diff line change
@@ -1,17 +1,20 @@
from packaging import version
from collections import namedtuple

import torch
from torch import nn
import torch.nn.functional as F
from torch.nn import Module, ModuleList

from einops import rearrange
from einops import einsum, rearrange
from einops.layers.torch import Rearrange

# constants

Config = namedtuple('FlashAttentionConfig', ['enable_flash', 'enable_math', 'enable_mem_efficient'])
Config = [
torch.nn.attention.SDPBackend.FLASH_ATTENTION,
torch.nn.attention.SDPBackend.MATH,
torch.nn.attention.SDPBackend.EFFICIENT_ATTENTION,
] # Flash Attention Config

# helpers

Expand Down Expand Up @@ -44,7 +47,7 @@ def posemb_sincos_3d(patches, temperature = 10000, dtype = torch.float32):
# main class

class Attend(Module):
def __init__(self, use_flash = False, config: Config = Config(True, True, True)):
def __init__(self, use_flash = False, config: list = Config):
super().__init__()
self.config = config
self.use_flash = use_flash
Expand All @@ -53,7 +56,7 @@ def __init__(self, use_flash = False, config: Config = Config(True, True, True))
def flash_attn(self, q, k, v):
# flash attention - https://arxiv.org/abs/2205.14135

with torch.backends.cuda.sdp_kernel(**self.config._asdict()):
with torch.nn.attention.sdpa_kernel(self.config):
out = F.scaled_dot_product_attention(q, k, v)

return out
Expand Down