[Hardware][CPU] using current_platform.is_cpu (vllm-project#9536)

Signed-off-by: Amit Garg <mitgarg17495@gmail.com>

tests/conftest.py

@@ -32,9 +32,10 @@
                          to_enc_dec_tuple_list, zip_enc_dec_prompts)
 from vllm.logger import init_logger
 from vllm.outputs import RequestOutput
+from vllm.platforms import current_platform
 from vllm.sampling_params import BeamSearchParams
 from vllm.utils import (STR_DTYPE_TO_TORCH_DTYPE, cuda_device_count_stateless,
-                        identity, is_cpu)
+                        identity)
 
 logger = init_logger(__name__)
 
@@ -236,7 +237,8 @@ class HfRunner:
 
     def wrap_device(self, input: _T, device: Optional[str] = None) -> _T:
         if device is None:
-            return self.wrap_device(input, "cpu" if is_cpu() else "cuda")
+            return self.wrap_device(
+                input, "cpu" if current_platform.is_cpu() else "cuda")
 
         if hasattr(input, "device") and input.device.type == device:
             return input

tests/encoder_decoder/test_e2e_correctness.py

@@ -7,8 +7,8 @@
 import pytest
 from transformers import AutoModelForSeq2SeqLM
 
+from vllm.platforms import current_platform
 from vllm.sequence import SampleLogprobs
-from vllm.utils import is_cpu
 
 from ..conftest import DecoderPromptType
 from ..models.utils import check_logprobs_close
@@ -35,7 +35,7 @@ def vllm_to_hf_output(
 @pytest.mark.parametrize("decoder_prompt_type", list(DecoderPromptType))
 @pytest.mark.parametrize("enforce_eager", [True, False])
 @pytest.mark.skipif(
-    is_cpu(),
+    current_platform.is_cpu(),
     reason="CPU backend is not currently supported with encoder/decoder models"
 )
 def test_encoder_decoder_e2e(
@@ -50,7 +50,7 @@ def test_encoder_decoder_e2e(
     enforce_eager: bool,
 ) -> None:
     '''
-    End-to-End (E2E) test for the encoder-decoder framework. 
+    End-to-End (E2E) test for the encoder-decoder framework.
     This test evaluates the encoder-decoder functionality using the BART
     model. We compare the outputs of the Hugging Face and vLLM
     implementations to ensure that both implementations produce consistent

tests/kernels/test_attention_selector.py

@@ -19,7 +19,8 @@ def test_env(name: str, device: str, monkeypatch):
     override_backend_env_variable(monkeypatch, name)
 
     if device == "cpu":
-        with patch("vllm.attention.selector.is_cpu", return_value=True):
+        with patch("vllm.attention.selector.current_platform.is_cpu",
+                   return_value=True):
             backend = which_attn_to_use(16, torch.float16, torch.float16, 16,
                                         False)
         assert backend.name == "TORCH_SDPA"

tests/models/decoder_only/language/test_phimoe.py

@@ -5,7 +5,7 @@
 import pytest
 import torch
 
-from vllm.utils import is_cpu
+from vllm.platforms import current_platform
 
 from ....utils import large_gpu_test
 from ...utils import check_logprobs_close
@@ -70,7 +70,7 @@ def test_phimoe_routing_function():
         assert torch.equal(topk_ids, ground_truth[test_id]["topk_ids"])
 
 
-@pytest.mark.skipif(condition=is_cpu(),
+@pytest.mark.skipif(condition=current_platform.is_cpu(),
                     reason="This test takes a lot time to run on CPU, "
                     "and vllm CI's disk space is not enough for this model.")
 @large_gpu_test(min_gb=80)

tests/models/decoder_only/vision_language/test_fuyu.py

@@ -3,8 +3,8 @@
 import pytest
 
 from vllm.multimodal.utils import rescale_image_size
+from vllm.platforms import current_platform
 from vllm.sequence import SampleLogprobs
-from vllm.utils import is_cpu
 
 from ....conftest import IMAGE_ASSETS, HfRunner, VllmRunner, _ImageAssets
 from ...utils import check_logprobs_close
@@ -46,7 +46,7 @@ def run_test(
 
     All the image fixtures for the test are from IMAGE_ASSETS.
     For huggingface runner, we provide the PIL images as input.
-    For vllm runner, we provide MultiModalDataDict objects 
+    For vllm runner, we provide MultiModalDataDict objects
     and corresponding MultiModalConfig as input.
     Note, the text input is also adjusted to abide by vllm contract.
     The text output is sanitized to be able to compare with hf.
@@ -103,7 +103,7 @@ def run_test(
 
 
 target_dtype = "half"
-if is_cpu():
+if current_platform.is_cpu():
     target_dtype = "bfloat16"
 
 

tests/models/decoder_only/vision_language/test_internvl.py

@@ -7,7 +7,7 @@
 from transformers import AutoConfig
 
 from vllm.multimodal.utils import rescale_image_size
-from vllm.utils import is_cpu
+from vllm.platforms import current_platform
 
 from ....conftest import (IMAGE_ASSETS, HfRunner, PromptImageInput, VllmRunner,
                           _ImageAssets)
@@ -78,7 +78,7 @@ def run_test(
 
     All the image fixtures for the test are from IMAGE_ASSETS.
     For huggingface runner, we provide the PIL images as input.
-    For vllm runner, we provide MultiModalDataDict objects 
+    For vllm runner, we provide MultiModalDataDict objects
     and corresponding MultiModalConfig as input.
     Note, the text input is also adjusted to abide by vllm contract.
     The text output is sanitized to be able to compare with hf.
@@ -244,7 +244,7 @@ def run_awq_test(
 
 
 target_dtype = "half"
-if is_cpu():
+if current_platform.is_cpu():
     target_dtype = "bfloat16"
 
 

tests/models/decoder_only/vision_language/test_phi3v.py

@@ -10,8 +10,9 @@
 from vllm.model_executor.models.phi3v import _IMAGE_TOKEN_ID
 from vllm.multimodal import MultiModalRegistry
 from vllm.multimodal.utils import rescale_image_size
+from vllm.platforms import current_platform
 from vllm.sequence import SampleLogprobs
-from vllm.utils import is_cpu, is_hip
+from vllm.utils import is_hip
 
 from ....conftest import (IMAGE_ASSETS, HfRunner, PromptImageInput, VllmRunner,
                           _ImageAssets)
@@ -49,7 +50,7 @@ def vllm_to_hf_output(vllm_output: Tuple[List[int], str,
 
 
 target_dtype = "half"
-if is_cpu():
+if current_platform.is_cpu():
     target_dtype = "bfloat16"
 
 # ROCm Triton FA can run into shared memory issues with these models,

tests/models/utils.py

@@ -5,8 +5,8 @@
 
 from vllm.config import ModelConfig, TaskOption
 from vllm.inputs import InputContext
+from vllm.platforms import current_platform
 from vllm.sequence import Logprob, PromptLogprobs, SampleLogprobs
-from vllm.utils import is_cpu
 
 TokensText = Tuple[List[int], str]
 
@@ -19,7 +19,7 @@ def check_outputs_equal(
     name_1: str,
 ):
     """
-    Compare the two sequences generated by different models, 
+    Compare the two sequences generated by different models,
     which should be equal.
     """
     assert len(outputs_0_lst) == len(outputs_1_lst)
@@ -255,7 +255,7 @@ def build_model_context(model_name: str,
                         mm_processor_kwargs: Optional[Dict] = None,
                         limit_mm_per_prompt: Optional[Dict] = None):
     """Creates an InputContext for a given model.
-    
+
     Args:
         model_name: Name of the model being considered.
         tokenizer_name: Name of the tokenizer being considered.
@@ -270,7 +270,7 @@ def build_model_context(model_name: str,
     if tokenizer_name is None:
         tokenizer_name = model_name
     if dtype is None:
-        dtype = "bfloat16" if is_cpu() else "half"
+        dtype = "bfloat16" if current_platform.is_cpu() else "half"
 
     model_config = ModelConfig(
         model_name,

tests/worker/test_encoder_decoder_model_runner.py

@@ -5,8 +5,9 @@
 import torch
 
 from vllm.engine.arg_utils import EngineArgs
+from vllm.platforms import current_platform
 from vllm.sequence import SamplingParams, SequenceData, SequenceGroupMetadata
-from vllm.utils import is_cpu, make_tensor_with_pad
+from vllm.utils import make_tensor_with_pad
 from vllm.worker.enc_dec_model_runner import EncoderDecoderModelRunner
 from vllm.worker.model_runner import _get_graph_batch_size
 
@@ -31,7 +32,7 @@ def _create_model_runner(model: str, *args,
     return model_runner
 
 
-@pytest.mark.skipif(condition=is_cpu(),
+@pytest.mark.skipif(condition=current_platform.is_cpu(),
                     reason="CPU backend is currently "
                     "unsupported for encoder/ "
                     "decoder models")
@@ -74,7 +75,7 @@ def test_empty_seq_group():
     assert return_seq_lens is None
 
 
-@pytest.mark.skipif(condition=is_cpu(),
+@pytest.mark.skipif(condition=current_platform.is_cpu(),
                     reason="CPU backend is currently "
                     "unsupported for encoder/ "
                     "decoder models")
@@ -264,7 +265,7 @@ def test_prepare_prompt(batch_size):
     assert torch.equal(actual, expected)
 
 
-@pytest.mark.skipif(condition=is_cpu(),
+@pytest.mark.skipif(condition=current_platform.is_cpu(),
                     reason="CPU backend is currently "
                     "unsupported for encoder/ "
                     "decoder models")
@@ -490,7 +491,7 @@ def test_prepare_decode(batch_size, multiple_seqs_per_seq_group):
 def test_prepare_decode_cuda_graph(batch_size, multiple_seqs_per_seq_group):
     """
     Tests that for encoder-decoder models with CUDA Graph capture and replay
-    enabled, the tensors used during the decode phase are correctly padded 
+    enabled, the tensors used during the decode phase are correctly padded
     for varying input batch sizes.
     """
     model_runner = _create_model_runner(

vllm/attention/backends/torch_sdpa.py

@@ -10,9 +10,9 @@
                                               AttentionMetadata, AttentionType)
 from vllm.attention.backends.utils import CommonAttentionState
 from vllm.attention.ops.paged_attn import PagedAttentionMetadata
-from vllm.utils import is_cpu
+from vllm.platforms import current_platform
 
-if is_cpu():
+if current_platform.is_cpu():
     try:
         from vllm.attention.ops.ipex_attn import PagedAttention
     except ImportError:
@@ -234,10 +234,10 @@ def get_seq_len_block_table_args(
         on the type of attention operation.
 
         Decoder attn -> select entirely decoder self-attention-related fields
-        Encoder/decoder cross-attn -> select encoder sequence lengths & 
+        Encoder/decoder cross-attn -> select encoder sequence lengths &
                                     cross-attn block-tables fields
         Encoder attn -> select encoder sequence lengths fields & no block tables
-        
+
         Arguments:
 
         * attn_metadata: Attention metadata structure associated with attention

vllm/attention/ops/blocksparse_attention/interface.py

@@ -3,7 +3,7 @@
 import torch
 
 from vllm.platforms import current_platform
-from vllm.utils import is_cpu, is_hip
+from vllm.utils import is_hip
 
 from .utils import (dense_to_crow_col, get_head_sliding_step,
                     get_sparse_attn_mask)
@@ -32,7 +32,7 @@ def __init__(
     ):
         super().__init__()
         if use_spda is None:
-            use_spda = is_hip() or is_cpu() or not \
+            use_spda = is_hip() or current_platform.is_cpu() or not \
                        IS_COMPUTE_8_OR_ABOVE
         device = device or (torch.cuda.current_device()
                             if current_platform.is_cuda_alike() else "cpu")
@@ -109,13 +109,13 @@ def varlen_attn(self,
         q, k, v: shape = (num_tokens, num_heads_q/kv, head_size).
         Support grouped attention, with `q[:, i*r:(i*r + r)]`
         is correspondent to `k[:, i]`, where `r` is the q/k ratio.
-        cu_seqlens_k: shape=(batch_size + 1,), 
-        indicating segment of samples, 
+        cu_seqlens_k: shape=(batch_size + 1,),
+        indicating segment of samples,
         e.g., `k[cu_seqlen[i]:cu_seqlne[i+1]]` is q of sample i
         cu_seqlens_q: shape=(batch_size + 1, ).
         Default None: same as cu_seqlens_k for prefilling or
         [0, 1, .., batch_size] for decoding.
-        The only case you need to specify is when q is a mix of 
+        The only case you need to specify is when q is a mix of
         prefilling and decoding.
         sm_scale: softmax scale, default to 1/sqrt(head_size).
 
@@ -171,7 +171,7 @@ def transpose_and_unpad(x_padded, cu_seqlens):
 
     def spda(self, q, k, v, cu_seqlens_k, cu_seqlens_q=None, sm_scale=None):
         """For CPU, V100 or other older GPUs.
-        NOTE: torch SPDA supports nested tensor, 
+        NOTE: torch SPDA supports nested tensor,
         but seems extremely slow. Choose to pad instead.
         """
         assert (cu_seqlens_q is None or
@@ -201,8 +201,8 @@ def spda(self, q, k, v, cu_seqlens_k, cu_seqlens_q=None, sm_scale=None):
         return self.transpose_and_unpad(spda_output, cu_seqlens)
 
     def forward(self, q, k, v, cu_seqlens_k, cu_seqlens_q=None, sm_scale=None):
-        """Dispatch to `varlen_attn` (Ampere or newer) or 
-        `self.spda`(cpu, Volta, Turing or older)based on 
+        """Dispatch to `varlen_attn` (Ampere or newer) or
+        `self.spda`(cpu, Volta, Turing or older)based on
         the type of device used and cuda compute capability.
 
         q, k, v: shape = (num_tokens, num_heads_q/kv, head_size).
@@ -213,8 +213,8 @@ def forward(self, q, k, v, cu_seqlens_k, cu_seqlens_q=None, sm_scale=None):
         cu_seqlens_q: shape=(batch_size + 1, ).
                     Default None: same as cu_seqlens_k for prefilling or
                     [0, 1, .., batch_size] for decoding.
-                    The only case you need to specify 
-                    is when q is a mix of prefilling 
+                    The only case you need to specify
+                    is when q is a mix of prefilling
                     and decoding.
         sm_scale: softmax scale, default to 1/sqrt(head_size).
 

vllm/attention/selector.py

@@ -10,7 +10,7 @@
 from vllm.attention.backends.abstract import AttentionBackend
 from vllm.logger import init_logger
 from vllm.platforms import current_platform
-from vllm.utils import STR_BACKEND_ENV_VAR, is_cpu, is_hip, is_openvino, is_xpu
+from vllm.utils import STR_BACKEND_ENV_VAR, is_hip, is_openvino, is_xpu
 
 logger = init_logger(__name__)
 
@@ -121,7 +121,7 @@ def get_attn_backend(
             ROCmFlashAttentionBackend)
         return ROCmFlashAttentionBackend
     elif backend == _Backend.TORCH_SDPA:
-        assert is_cpu(), RuntimeError(
+        assert current_platform.is_cpu(), RuntimeError(
             "Torch SDPA backend is only used for the CPU device.")
         logger.info("Using Torch SDPA backend.")
         from vllm.attention.backends.torch_sdpa import TorchSDPABackend
@@ -183,7 +183,7 @@ def which_attn_to_use(
         if backend_by_env_var is not None:
             selected_backend = backend_name_to_enum(backend_by_env_var)
 
-    if is_cpu():
+    if current_platform.is_cpu():
         if selected_backend != _Backend.TORCH_SDPA:
             logger.info("Cannot use %s backend on CPU.", selected_backend)
         return _Backend.TORCH_SDPA

vllm/distributed/parallel_state.py

@@ -7,7 +7,7 @@
 The typical workflow is:
 
 - call `init_distributed_environment` to initialize the distributed environment.
-- call `initialize_model_parallel` or `ensure_model_parallel_initialized` to 
+- call `initialize_model_parallel` or `ensure_model_parallel_initialized` to
  initialize the model parallel groups.
 
 - any code dealing with the distributed stuff
@@ -37,7 +37,7 @@
 import vllm.envs as envs
 from vllm.logger import init_logger
 from vllm.platforms import current_platform
-from vllm.utils import is_cpu, supports_custom_op
+from vllm.utils import supports_custom_op
 
 
 @dataclass
@@ -1139,7 +1139,7 @@ def cleanup_dist_env_and_memory(shutdown_ray: bool = False):
         import ray  # Lazy import Ray
         ray.shutdown()
     gc.collect()
-    if not is_cpu():
+    if not current_platform.is_cpu():
         torch.cuda.empty_cache()
 
 

vllm/model_executor/custom_op.py

@@ -7,7 +7,7 @@
 from vllm.compilation.levels import CompilationLevel
 from vllm.logger import init_logger
 from vllm.platforms import current_platform
-from vllm.utils import is_cpu, is_hip, is_xpu, print_warning_once
+from vllm.utils import is_hip, is_xpu, print_warning_once
 
 logger = init_logger(__name__)
 
@@ -74,7 +74,7 @@ def dispatch_forward(self):
 
         if is_hip():
             return self.forward_hip
-        elif is_cpu():
+        elif current_platform.is_cpu():
             return self.forward_cpu
         elif current_platform.is_tpu():
             return self.forward_tpu