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2026-07-13 13:18:33 +08:00

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Python

# Copyright (c) Microsoft Corporation.
# SPDX-License-Identifier: Apache-2.0
# DeepSpeed Team
import pytest
import torch
import deepspeed
from deepspeed.ops.op_builder import InferenceBuilder
from deepspeed.accelerator import get_accelerator
if not deepspeed.ops.__compatible_ops__[InferenceBuilder.NAME]:
pytest.skip("Inference ops are not available on this system", allow_module_level=True)
@pytest.mark.inference_ops
@pytest.mark.parametrize("num_heads", [64, 32, 16, 8])
def test_rope_warp_size_alignment(num_heads):
if get_accelerator().device_name() != "cuda":
pytest.skip("This test runs only on GPU")
batch = 1
head = 8
seq_len = 1024
head_dim = 32
rotary_dim = 32
offset = 8
rotate_half = False
rope_theta = 2
cuda0 = torch.device('cuda:0')
query = torch.randn(batch, head, seq_len, head_dim, device=cuda0)
key = torch.randn(batch, head, seq_len, head_dim, device=cuda0)
inference = InferenceBuilder().load()
# For num_heads values of 64, 32, 16, 8
# corresponding threads_per_head (defined in apply_rotary_pos_emb.cu) values are 4, 8, 16, 32
inference.apply_rotary_pos_emb(query, key, rotary_dim, offset, num_heads, rotate_half, rope_theta)