[CI] Make mistral tests pass (vllm-project#4596)

.buildkite/test-pipeline.yaml

@@ -76,7 +76,7 @@ steps:
   #mirror_hardwares: [amd]
   commands:
     - bash ../.buildkite/download-images.sh
-    - pytest -v -s models --ignore=models/test_llava.py --ignore=models/test_mistral.py
+    - pytest -v -s models --ignore=models/test_llava.py
 
 - label: Llava Test
   #mirror_hardwares: [amd]

tests/conftest.py

@@ -272,6 +272,68 @@ def generate_greedy_logprobs(
             all_logprobs.append(seq_logprobs)
         return all_logprobs
 
+    def generate_greedy_logprobs_limit(
+        self,
+        prompts: List[str],
+        max_tokens: int,
+        num_logprobs: int,
+    ) -> List[Tuple[List[int], str]]:
+        all_logprobs = []
+        all_output_ids = []
+        all_output_strs = []
+
+        for prompt in prompts:
+            input_ids = self.tokenizer(prompt, return_tensors="pt").input_ids
+            output = self.model.generate(
+                input_ids.cuda(),
+                use_cache=True,
+                do_sample=False,
+                max_new_tokens=max_tokens,
+                output_hidden_states=True,
+                return_dict_in_generate=True,
+            )
+
+            seq_logprobs = []
+            for _, hidden_states in enumerate(output.hidden_states):
+                last_hidden_states = hidden_states[-1][0]
+                logits = torch.matmul(
+                    last_hidden_states,
+                    self.model.get_output_embeddings().weight.t(),
+                )
+                if getattr(self.model.get_output_embeddings(), "bias",
+                           None) is not None:
+                    logits += self.model.get_output_embeddings(
+                    ).bias.unsqueeze(0)
+                logprobs = torch.nn.functional.log_softmax(logits,
+                                                           dim=-1,
+                                                           dtype=torch.float32)
+                seq_logprobs.append(logprobs)
+
+            # convert to dict
+            seq_logprobs_lst = []
+            for tok_idx, tok_logprobs in enumerate(seq_logprobs):
+                # drop prompt logprobs
+                if tok_idx == 0:
+                    tok_logprobs = tok_logprobs[-1, :].reshape(1, -1)
+                topk = tok_logprobs.topk(num_logprobs)
+
+                tok_logprobs_dct = {}
+                for token_id, logprob in zip(topk.indices[0], topk.values[0]):
+                    tok_logprobs_dct[token_id.item()] = logprob.item()
+
+                seq_logprobs_lst.append(tok_logprobs_dct)
+
+            all_logprobs.append(seq_logprobs_lst)
+            seq_ids = output.sequences[0]
+            output_len = seq_ids.shape[0] - input_ids.shape[1]
+            output_ids = seq_ids[-output_len:]
+            all_output_ids.append(output_ids.tolist())
+            all_output_strs.append(self.tokenizer.decode(output_ids))
+
+        outputs = zip(all_output_ids, all_output_strs, all_logprobs)
+        return [(output_ids, output_str, output_logprobs)
+                for output_ids, output_str, output_logprobs in outputs]
+
     def __del__(self):
         del self.model
         cleanup()

tests/models/test_big_models.py

@@ -8,7 +8,7 @@
 
 MODELS = [
     "meta-llama/Llama-2-7b-hf",
-    # "mistralai/Mistral-7B-v0.1",  # Broken
+    # "mistralai/Mistral-7B-v0.1",  # Tested by test_mistral.py
     # "Deci/DeciLM-7b",  # Broken
     # "tiiuae/falcon-7b",  # Broken
     "EleutherAI/gpt-j-6b",

tests/models/test_mistral.py

@@ -4,37 +4,40 @@
 """
 import pytest
 
+from tests.models.utils import check_logprobs_close
+
 MODELS = [
     "mistralai/Mistral-7B-Instruct-v0.1",
 ]
 
 
 @pytest.mark.parametrize("model", MODELS)
 @pytest.mark.parametrize("dtype", ["bfloat16"])
-@pytest.mark.parametrize("max_tokens", [128])
-@pytest.mark.skip(
-    "Two problems: 1. Failing correctness tests. 2. RuntimeError: expected "
-    "scalar type BFloat16 but found Half (only in CI).")
+@pytest.mark.parametrize("max_tokens", [64])
+@pytest.mark.parametrize("num_logprobs", [5])
 def test_models(
     hf_runner,
     vllm_runner,
-    example_long_prompts,
+    example_prompts,
     model: str,
     dtype: str,
     max_tokens: int,
+    num_logprobs: int,
 ) -> None:
+    # TODO(sang): Sliding window should be tested separately.
     hf_model = hf_runner(model, dtype=dtype)
-    hf_outputs = hf_model.generate_greedy(example_long_prompts, max_tokens)
+    hf_outputs = hf_model.generate_greedy_logprobs_limit(
+        example_prompts, max_tokens, num_logprobs)
     del hf_model
 
     vllm_model = vllm_runner(model, dtype=dtype)
-    vllm_outputs = vllm_model.generate_greedy(example_long_prompts, max_tokens)
+    vllm_outputs = vllm_model.generate_greedy_logprobs(example_prompts,
+                                                       max_tokens,
+                                                       num_logprobs)
     del vllm_model
-
-    for i in range(len(example_long_prompts)):
-        hf_output_ids, hf_output_str = hf_outputs[i]
-        vllm_output_ids, vllm_output_str = vllm_outputs[i]
-        assert hf_output_str == vllm_output_str, (
-            f"Test{i}:\nHF: {hf_output_str!r}\nvLLM: {vllm_output_str!r}")
-        assert hf_output_ids == vllm_output_ids, (
-            f"Test{i}:\nHF: {hf_output_ids}\nvLLM: {vllm_output_ids}")
+    check_logprobs_close(
+        outputs_0_lst=hf_outputs,
+        outputs_1_lst=vllm_outputs,
+        name_0="hf",
+        name_1="vllm",
+    )

vllm/model_executor/layers/rotary_embedding.py

@@ -109,7 +109,7 @@ def _forward(
             key_pass = key[..., self.rotary_dim:]
 
         self.cos_sin_cache: torch.Tensor = self.cos_sin_cache.to(
-            positions.device)
+            positions.device, dtype=query.dtype)
         cos_sin = self.cos_sin_cache[torch.add(positions, offsets)
                                      if offsets is not None else positions]
         cos, sin = cos_sin.chunk(2, dim=-1)
@@ -143,7 +143,8 @@ def forward(
         key: torch.Tensor,
         offsets: Optional[torch.Tensor] = None,
     ) -> Tuple[torch.Tensor, torch.Tensor]:
-        self.cos_sin_cache = self.cos_sin_cache.to(positions.device)
+        self.cos_sin_cache = self.cos_sin_cache.to(positions.device,
+                                                   dtype=query.dtype)
         # ops.rotary_embedding()/batched_rotary_embedding()
         # are in-place operations that update the query and key tensors.
         if offsets is not None: