MII v0.1.0 release

.pre-commit-config.yaml

@@ -42,7 +42,7 @@ repos:
     rev: 4.0.1
     hooks:
     -   id: flake8
-        args: ['--ignore=E,F403,F405,F541,F841,W', '--select=E9,F,W6', '--per-file-ignores=__init__.py:F401,mii/grpc_related/proto/modelresponse_pb2.py:F821,F401']
+        args: ['--ignore=E,F403,F405,F541,F841,W', '--select=E9,F,W6', '--per-file-ignores=__init__.py:F401,mii/grpc_related/proto/modelresponse_pb2.py:F821,F401,mii/legacy/grpc_related/proto/legacymodelresponse_pb2.py:F821,F401']
 
 -   repo: local
     hooks:

examples/README.md

@@ -0,0 +1,2 @@
+# MII Examples
+Please see [DeepSpeedExamples](https://github.com/microsoft/DeepSpeedExamples/tree/master/inference/mii) for a few examples on using MII.

mii/__init__.py

@@ -2,19 +2,19 @@
 # SPDX-License-Identifier: Apache-2.0
 
 # DeepSpeed Team
-import grpc
-from .server import MIIServer
-from .client import MIIClient, mii_query_handle
-from .deployment import deploy
-from .terminate import terminate
-from .constants import DeploymentType, TaskType
-from .aml_related.utils import aml_output_path
-from .config import MIIConfig, ModelConfig
-from .utils import get_supported_models
-from .grpc_related.proto import modelresponse_pb2_grpc
+try:
+    import grpc
+    from .pipeline import pipeline
+    from .server import serve
+    from .client import client
+except ImportError as e:
+    print("Warning: DeepSpeed-FastGen could not be imported:")
+    print(e)
+    pass
+
+from .legacy import MIIServer, MIIClient, mii_query_handle, deploy, terminate, DeploymentType, TaskType, aml_output_path, MIIConfig, ModelConfig, get_supported_models
 
 __version__ = "0.0.0"
-non_persistent_models = {}
 try:
     from .version import __version__
 except ImportError:

mii/batching/__init__.py

@@ -0,0 +1,6 @@
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
+
+from .ragged_batching import MIIAsyncPipeline, MIIPipeline

mii/batching/generation/logit_processors.py

@@ -0,0 +1,111 @@
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
+import abc
+from typing import List, Optional
+
+import torch
+import torch.nn.functional as F
+
+FLOAT_PAD = -float("inf")
+
+
+class BaseLogitProcessor(abc.ABC):
+    def __call__(self, logits: torch.Tensor) -> torch.Tensor:
+        return self.forward(logits)
+
+    @abc.abstractmethod
+    def forward(self, logits: torch.Tensor) -> torch.Tensor:
+        ...
+
+    def get_key(self) -> str:
+        return self.__class__.__name__
+
+
+class TopKLogitProcessor(BaseLogitProcessor):
+    def __init__(self, top_k: int) -> None:
+        self.top_k = top_k
+
+    def forward(self, logits: torch.Tensor) -> torch.Tensor:
+        # Remove all tokens with a probability less than the
+        # last token of the top-k
+        indices_to_remove = logits < torch.topk(logits, self.top_k)[0][..., -1, None]
+        logits[indices_to_remove] = FLOAT_PAD
+        return logits
+
+    def get_key(self) -> str:
+        return super().get_key() + f"_top_k={self.top_k}"
+
+
+class TopPLogitProcessor(BaseLogitProcessor):
+    def __init__(self, top_p: float) -> None:
+        assert 0.0 <= top_p <= 1.0
+        self.top_p = top_p
+
+    def forward(self, logits: torch.Tensor) -> torch.Tensor:
+        # convert to 1D
+        sorted_logits, sorted_indices = torch.sort(logits, descending=True, dim=-1)
+        cumulative_probs = torch.cumsum(F.softmax(sorted_logits, dim=-1), dim=-1)
+
+        # Remove tokens with cumulative probability above the threshold
+        sorted_indices_to_remove = cumulative_probs > self.top_p
+        # Shift the indices to the right to keep also the first token
+        # above the threshold
+        sorted_indices_to_remove[..., 1:] = sorted_indices_to_remove[..., :-1].clone()
+        sorted_indices_to_remove[..., 0] = 0
+        for i in range(sorted_indices.size(0)):
+            indices_to_remove = sorted_indices[i][sorted_indices_to_remove[i]]
+            logits[i][indices_to_remove] = FLOAT_PAD
+        return logits
+
+    def get_key(self) -> str:
+        return super().get_key() + f"_top_p={self.top_p}"
+
+
+class TemperatureLogitProcessor(BaseLogitProcessor):
+    def __init__(self, temperature: float) -> None:
+        self.temperature = temperature
+        assert self.temperature > 0.0
+
+    def forward(self, logits: torch.Tensor) -> torch.Tensor:
+        return logits / self.temperature
+
+    def get_key(self) -> str:
+        return super().get_key() + f"_temperature={self.temperature}"
+
+
+class PipelineLogitProcessor(BaseLogitProcessor):
+    def __init__(self, pipeline: List[BaseLogitProcessor]) -> None:
+        assert all(isinstance(step, BaseLogitProcessor) for step in pipeline)
+        self.pipeline = pipeline
+
+    def forward(self, logits: torch.Tensor) -> torch.Tensor:
+        for step in self.pipeline:
+            logits = step(logits)
+        return logits
+
+    def get_key(self) -> str:
+        return super().get_key(
+        ) + f"_{'_'.join(step.get_key() for step in self.pipeline)}"
+
+
+class NucleusSamplingLogitProcessor(BaseLogitProcessor):
+    def __init__(self,
+                 top_k: Optional[int] = None,
+                 top_p: Optional[float] = None) -> None:
+        assert top_k is not None or top_p is not None
+        if top_k is None:
+            self._processor = TopPLogitProcessor(top_p)
+        elif top_p is None:
+            self._processor = TopKLogitProcessor(top_k)
+        else:
+            self._processor = PipelineLogitProcessor(
+                [TopKLogitProcessor(top_k),
+                 TopPLogitProcessor(top_p)])
+
+    def forward(self, logits: torch.Tensor) -> torch.Tensor:
+        return self._processor(logits)
+
+    def get_key(self) -> str:
+        return super().get_key() + f"_{self._processor.get_key()}"

mii/batching/generation/samplers.py

@@ -0,0 +1,57 @@
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
+import abc
+from typing import Tuple
+
+import torch
+from torch.distributions import Categorical
+
+
+class BaseGenerationSampler(abc.ABC):
+    @abc.abstractmethod
+    def __call__(
+        self,
+        logits: torch.Tensor,
+    ) -> Tuple[torch.LongTensor,
+               torch.Tensor]:
+        """
+        Given the logits, return the next token to add to the sequence, as well
+        as the log probability of the token
+
+        Args:
+            logits (torch.Tensor):
+                The logits from the model. Shape: (batch_size, vocab_size)
+
+        Returns:
+            Tuple[torch.LongTensor, torch.Tensor]:
+                The next token to add to the sequence, and the log probability
+                of the token. Shape: (batch_size,) and (batch_size,)
+        """
+        ...
+
+    def get_key(self) -> str:
+        return self.__class__.__name__
+
+
+class LogitsSampler(BaseGenerationSampler):
+    def __call__(
+        self,
+        logits: torch.Tensor,
+    ) -> Tuple[torch.LongTensor,
+               torch.Tensor]:
+        logits = logits.float()
+        sampler = Categorical(logits=logits)
+        next_tokens = sampler.sample()
+        logprobs = sampler.log_prob(next_tokens)
+        return next_tokens, logprobs
+
+
+class GreedySampler(BaseGenerationSampler):
+    def __call__(self, logits: torch.Tensor) -> Tuple[torch.LongTensor, torch.Tensor]:
+        logits = logits.float()
+        sampler = Categorical(logits=logits)
+        next_tokens = logits.argmax(dim=-1)
+        logprobs = sampler.log_prob(next_tokens)
+        return next_tokens, logprobs

mii/batching/generation/stop_criterion.py

@@ -0,0 +1,97 @@
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
+import abc
+from typing import List, Union
+
+import torch
+
+# from megatron import get_tokenizer
+# from megatron.tokenizer.tokenizer import AbstractTokenizer
+
+
+class BaseGenerationStopCriterion(abc.ABC):
+    def __init__(self, tokenizer):
+        self.tokenizer = tokenizer
+
+    def __call__(self, tokens: torch.LongTensor) -> torch.BoolTensor:
+        return self.forward(tokens)
+
+    @abc.abstractmethod
+    def forward(self, tokens: torch.LongTensor) -> torch.BoolTensor:
+        ...
+
+    def get_key(self) -> str:
+        return self.__class__.__name__
+
+
+class TokenStopCriterion(BaseGenerationStopCriterion):
+    def __init__(self, token: Union[str, int], tokenizer) -> None:
+        super().__init__(tokenizer=tokenizer)
+        if isinstance(token, str):
+            token_id = self.tokenizer.tokenize(token)[0]
+        else:
+            token_id = token
+        self.stop_token_id = token_id
+
+    def forward(self, tokens: torch.LongTensor) -> torch.BoolTensor:
+        retval = torch.zeros_like(tokens, dtype=torch.bool)
+        retval |= tokens == self.stop_token_id
+        return retval
+
+    def get_key(self) -> str:
+        return self.__class__.__name__ + f"_token_id={self.stop_token_id}"
+
+
+class EosGenerationStopCriterion(BaseGenerationStopCriterion):
+    def __init__(self, tokenizer):
+        super().__init__(tokenizer=tokenizer)
+        if hasattr(self.tokenizer, "eod"):
+            self.eos_id = self.tokenizer.eod
+        elif hasattr(self.tokenizer, "eos_token_id"):
+            self.eos_id = self.tokenizer.eos_token_id
+        elif hasattr(self.tokenizer, "eos_token"):
+            self.eos_id = self.tokenizer.eos_token
+        else:
+            raise ValueError(
+                "Tokenizer must have either an `eod` or `eos_token` attribute.")
+
+    def forward(self, tokens: torch.LongTensor) -> torch.BoolTensor:
+        return tokens == self.eos_id
+
+
+class NewLineDelimitedStopCriterion(BaseGenerationStopCriterion):
+    def __init__(self, tokenizer):
+        super().__init__(tokenizer=tokenizer)
+        self.stop_token_ids = list(
+            set([self.tokenizer.tokenize(x)[0] for x in ["\n",
+                                                         "\r\n",
+                                                         "\n\n",
+                                                         ".\n\n"]]))
+
+    def forward(self, tokens: torch.LongTensor) -> torch.BoolTensor:
+        retval = torch.zeros_like(tokens, dtype=torch.bool)
+        for stop_token_id in self.stop_token_ids:
+            retval |= tokens == stop_token_id
+        return retval
+
+
+class PipelinedCriterion(BaseGenerationStopCriterion):
+    def __init__(
+        self,
+        criteria: List[BaseGenerationStopCriterion],
+        tokenizer,
+    ):
+        super().__init__(tokenizer=tokenizer)
+        self.criteria = criteria
+
+    def forward(self, tokens: torch.LongTensor) -> torch.BoolTensor:
+        retval = torch.zeros_like(tokens, dtype=torch.bool)
+        for criterion in self.criteria:
+            retval |= criterion(tokens)
+        return retval
+
+    def get_key(self) -> str:
+        return super().get_key(
+        ) + f"_{'_'.join(criterion.get_key() for criterion in self.criteria)}"