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Fix Evoformer compilation #7760

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Fix Evoformer compilation #7760

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643cac1
Fix Evoformer compilation when no GPU is present
sdvillal Jan 5, 2026
1e71bdb
Fix broken cutlass version comparison
sdvillal Jan 5, 2026
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17 changes: 2 additions & 15 deletions op_builder/evoformer_attn.py
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Original file line number Diff line number Diff line change
Expand Up @@ -5,6 +5,7 @@

from .builder import CUDAOpBuilder, installed_cuda_version
import os
from packaging.version import Version


class EvoformerAttnBuilder(CUDAOpBuilder):
Expand All @@ -29,18 +30,6 @@ def sources(self):
src_dir = 'csrc/deepspeed4science/evoformer_attn'
return [f'{src_dir}/attention.cpp', f'{src_dir}/attention_back.cu', f'{src_dir}/attention_cu.cu']

def nvcc_args(self):
args = super().nvcc_args()
try:
import torch
except ImportError:
self.warning("Please install torch if trying to pre-compile kernels")
return args
major = torch.cuda.get_device_properties(0).major #ignore-cuda
minor = torch.cuda.get_device_properties(0).minor #ignore-cuda
args.append(f"-DGPU_ARCH={major}{minor}")
return args

def is_compatible(self, verbose=False):
try:
import torch
Expand All @@ -66,9 +55,7 @@ def is_compatible(self, verbose=False):
if verbose:
self.warning("Please pip install nvidia-cutlass if trying to pre-compile kernels")
return False
cutlass_major, cutlass_minor = cutlass.__version__.split('.')[:2]
cutlass_compatible = (int(cutlass_major) >= 3 and int(cutlass_minor) >= 1)
if not cutlass_compatible:
if Version(cutlass.__version__) < Version('3.1.0'):
if verbose:
self.warning("Please use CUTLASS version >= 3.1.0")
return False
Expand Down