#13332: add ttnn implementation for Bert-Tiny model

models/demos/bert_tiny/README.md

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+## Bert-Tiny Demo
+
+## Introduction
+BERT stands for Bidirectional Encoder Representations from Transformers. Unlike recent language representation models, BERT is designed to pre-train deep bidirectional representations from unlabeled text by jointly conditioning on both left and right context in all layers. As a result, the pre-trained BERT model can be fine-tuned with just one additional output layer to create state-of-the-art models for a wide range of tasks, such as question answering and language inference, without substantial task-specific architecture modifications.
+
+# Platforms:
+    E150, WH N300, N150
+
+## How to Run
+
+Use `pytest --disable-warnings models/demos/bert_tiny/demo/demo.py::test_demo[models/demos/bert_tiny/demo/input_data.json-mrm8488/bert-tiny-finetuned-squadv2-128-8-device_params0]` to run the demo.
+
+
+If you wish to run the demo with a different input use `pytest --disable-warnings models/demos/bert_tiny/demo/demo.py::test_demo[<address_to_your_json_file.json>-mrm8488/bert-tiny-finetuned-squadv2-128-8-device_params0]`. This file is expected to have exactly 8 inputs.
+
+
+Our second demo is designed to run SQuADV2 dataset, run this with `pytest --disable-warnings models/demos/bert_tiny/demo/demo.py::test_demo_squadv2[1-mrm8488/bert-tiny-finetuned-squadv2-384-8-device_params0]`.
+
+If you wish to run for `n_iterations` samples, use `pytest --disable-warnings models/demos/bert_tiny/demo/demo.py::test_demo_squadv2[<n_iterations>-mrm8488/bert-tiny-finetuned-squadv2-384-8-device_params0]`
+
+
+# Inputs
+Inputs by default are provided from `input_data.json`. If you wish you to change the inputs, provide a different path to test_demo.
+
+We do not recommend modifying `input_data.json` file.
+
+# Details
+The entry point to  bert model is bert_for_question_answering in `models/demos/bert_tiny/tt/bert_tiny.py`. The model picks up certain configs and weights from huggingface pretrained model. We have used `mrm8488/bert-tiny-finetuned-squadv2` version from huggingface as our reference.

models/demos/bert_tiny/demo/demo.py

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+# SPDX-FileCopyrightText: © 2023 Tenstorrent Inc.
+
+# SPDX-License-Identifier: Apache-2.0
+
+import json
+import pytest
+import torch
+from loguru import logger
+
+import ttnn
+from models.utility_functions import (
+    disable_compilation_reports,
+    disable_persistent_kernel_cache,
+    profiler,
+)
+from models.experimental.functional_common.attention_mask_functions import get_extended_attention_mask
+
+from models.datasets.dataset_squadv2 import squadv2_1K_samples_input, squadv2_answer_decode_batch
+from ttnn.model_preprocessing import (
+    preprocess_model_parameters,
+)
+
+from ttnn.model_preprocessing import *
+from transformers import BertForQuestionAnswering, BertTokenizer, pipeline
+from models.demos.bert_tiny.tt.bert_tiny import bert_for_question_answering, preprocess_inputs
+import evaluate
+
+
+def load_inputs(input_path, batch):
+    with open(input_path) as f:
+        input_data = json.load(f)
+        assert len(input_data) >= batch, f"Input data needs to have at least {batch} (batch size) entries."
+
+        context = []
+        question = []
+        for i in range(batch):
+            context.append(input_data[i]["context"])
+            question.append(input_data[i]["question"])
+
+        return context, question
+
+
+def positional_ids(config, input_ids, past_key_values_length=0):
+    seq_length = input_ids.size(1)
+    position_ids = torch.arange(config.max_position_embeddings, dtype=torch.long, device=input_ids.device)
+    position_ids = position_ids.unsqueeze(0)[:, past_key_values_length : seq_length + past_key_values_length]
+    position_ids = position_ids.expand_as(input_ids)
+
+    return position_ids
+
+
+def run_bert_question_and_answering_inference(
+    device,
+    use_program_cache,
+    model_name,
+    batch_size,
+    sequence_size,
+    model_location_generator,
+    input_path,
+):
+    disable_persistent_kernel_cache()
+    model = str(model_location_generator(model_name, model_subdir="Bert"))
+    hugging_face_reference_model = BertForQuestionAnswering.from_pretrained(model, torchscript=False)
+    pytorch_model = hugging_face_reference_model.eval()
+
+    tokenizer_name = str(model_location_generator(model_name, model_subdir="Bert"))
+    tokenizer = BertTokenizer.from_pretrained(tokenizer_name)
+    config = hugging_face_reference_model.config
+    nlp = pipeline("question-answering", model=hugging_face_reference_model, tokenizer=tokenizer)
+
+    profiler.start(f"preprocessing_parameter")
+    parameters = preprocess_model_parameters(
+        initialize_model=lambda: pytorch_model,
+        device=device,
+        convert_to_ttnn=lambda *_: True,
+    )
+    profiler.end(f"preprocessing_parameter")
+
+    context, question = load_inputs(input_path, batch_size)
+
+    preprocess_params, _, postprocess_params = nlp._sanitize_parameters()
+    preprocess_params["max_seq_len"] = sequence_size
+    inputs = nlp._args_parser({"context": context, "question": question})
+    preprocessed_inputs = []
+    for i in range(batch_size):
+        model_input = next(nlp.preprocess(inputs[0][i], **preprocess_params))
+        single_input = {
+            "example": model_input["example"],
+            "inputs": model_input,
+        }
+        preprocessed_inputs.append(single_input)
+
+    bert_input = tokenizer.batch_encode_plus(
+        zip(question, context),
+        max_length=sequence_size,
+        padding="max_length",
+        truncation=True,
+        return_attention_mask=True,
+        return_token_type_ids=True,
+        return_tensors="pt",
+    )
+
+    position_ids = positional_ids(config, bert_input.input_ids)
+    profiler.start(f"preprocessing_input")
+    ttnn_bert_inputs = preprocess_inputs(
+        bert_input["input_ids"],
+        bert_input["token_type_ids"],
+        position_ids,
+        bert_input["attention_mask"],
+        device=device,
+    )
+    profiler.end(f"preprocessing_input")
+
+    profiler.start(f"inference_time")
+    ttnn_output = bert_for_question_answering(
+        config,
+        *ttnn_bert_inputs,
+        parameters=parameters,
+        device=device,
+    )
+    profiler.end(f"inference_time")
+
+    ttnn_output = (
+        ttnn.to_torch(ttnn.from_device(ttnn_output)).reshape(batch_size, 1, sequence_size, -1).to(torch.float32)
+    )
+
+    ttnn_start_logits = ttnn_output[..., :, 0].squeeze(1)
+    ttnn_end_logits = ttnn_output[..., :, 1].squeeze(1)
+
+    model_answers = {}
+    profiler.start("post_processing_output_to_string")
+    for i in range(batch_size):
+        tt_res = {
+            "start": ttnn_start_logits[i],
+            "end": ttnn_end_logits[i],
+            "example": preprocessed_inputs[i]["example"],
+            **preprocessed_inputs[i]["inputs"],
+        }
+
+        tt_answer = nlp.postprocess([tt_res], **postprocess_params)
+
+        logger.info(f"answer: {tt_answer['answer']}\n")
+        model_answers[i] = tt_answer["answer"]
+
+    profiler.end("post_processing_output_to_string")
+
+    measurements = {
+        "preprocessing_parameter": profiler.get("preprocessing_parameter"),
+        "preprocessing_input": profiler.get("preprocessing_input"),
+        "inference_time": profiler.get("inference_time"),
+        "post_processing": profiler.get("post_processing_output_to_string"),
+    }
+    logger.info(f"preprocessing_parameter: {measurements['preprocessing_parameter']} s")
+    logger.info(f"preprocessing_input: {measurements['preprocessing_input']} s")
+    logger.info(f"inference_time: {measurements['inference_time']} s")
+    logger.info(f"post_processing : {measurements['post_processing']} s")
+
+    return measurements
+
+
+def run_bert_question_and_answering_inference_squad_v2(
+    device,
+    use_program_cache,
+    model_name,
+    batch_size,
+    sequence_size,
+    model_location_generator,
+    n_iterations,
+):
+    disable_persistent_kernel_cache()
+
+    model = str(model_location_generator(model_name, model_subdir="Bert"))
+    hugging_face_reference_model = BertForQuestionAnswering.from_pretrained(model, torchscript=False)
+    pytorch_model = hugging_face_reference_model.eval()
+
+    # set up tokenizer
+    tokenizer_name = str(model_location_generator(model_name, model_subdir="Bert"))
+    tokenizer = BertTokenizer.from_pretrained(tokenizer_name)
+    config = hugging_face_reference_model.config
+
+    parameters = preprocess_model_parameters(
+        initialize_model=lambda: pytorch_model,
+        device=device,
+        convert_to_ttnn=lambda *_: True,
+    )
+    nlp = pipeline("question-answering", model=hugging_face_reference_model, tokenizer=tokenizer)
+
+    attention_mask = True
+    token_type_ids = True
+    inputs_squadv2 = squadv2_1K_samples_input(tokenizer, sequence_size, attention_mask, token_type_ids, batch_size)
+    squad_metric = evaluate.load("squad_v2")
+
+    with torch.no_grad():
+        pred_labels = []
+        cpu_pred_labels = []
+        true_labels = []
+        i = 0
+        for batch in inputs_squadv2:
+            if i < n_iterations:
+                batch_data = batch[0]
+                curr_batch_size = batch_data["input_ids"].shape[0]
+                position_ids = positional_ids(config, batch_data.input_ids)
+                ttnn_bert_inputs = preprocess_inputs(
+                    batch_data["input_ids"],
+                    batch_data["token_type_ids"],
+                    position_ids,
+                    batch_data["attention_mask"],
+                    device=device,
+                )
+                tt_output = bert_for_question_answering(
+                    config,
+                    *ttnn_bert_inputs,
+                    parameters=parameters,
+                    device=device,
+                )
+                tt_output = (
+                    ttnn.to_torch(ttnn.from_device(tt_output))
+                    .reshape(batch_size, 1, sequence_size, -1)
+                    .to(torch.float32)
+                )
+                cpu_output = hugging_face_reference_model(**batch_data)
+                references = batch[1]
+                question = batch[2]
+                context = batch[3]
+
+                cpu_predictions, tt_predictions = squadv2_answer_decode_batch(
+                    hugging_face_reference_model,
+                    tokenizer,
+                    nlp,
+                    references,
+                    cpu_output,
+                    tt_output,
+                    curr_batch_size,
+                    question,
+                    context,
+                )
+                pred_labels.extend(tt_predictions)
+                cpu_pred_labels.extend(cpu_predictions)
+                true_labels.extend(references)
+
+                del tt_output
+            i += 1
+        eval_score = squad_metric.compute(predictions=pred_labels, references=true_labels)
+        cpu_eval_score = squad_metric.compute(predictions=cpu_pred_labels, references=true_labels)
+        logger.info(f"\tTT_Eval: exact: {eval_score['exact']} --  F1: {eval_score['f1']}")
+        logger.info(f"\tCPU_Eval: exact: {cpu_eval_score['exact']} -- F1:  {cpu_eval_score['f1']}")
+
+
+@pytest.mark.parametrize("device_params", [{"l1_small_size": 24576}], indirect=True)
+@pytest.mark.parametrize("batch_size", [8])
+@pytest.mark.parametrize("sequence_size", [128])
+@pytest.mark.parametrize("model_name", ["mrm8488/bert-tiny-finetuned-squadv2"])
+@pytest.mark.parametrize("input_loc", ["models/demos/bert_tiny/demo/input_data.json"])
+def test_demo(
+    input_loc,
+    batch_size,
+    sequence_size,
+    model_name,
+    model_location_generator,
+    device,
+    use_program_cache,
+):
+    disable_persistent_kernel_cache()
+    disable_compilation_reports()
+
+    return run_bert_question_and_answering_inference(
+        device=device,
+        use_program_cache=use_program_cache,
+        model_name=model_name,
+        batch_size=batch_size,
+        sequence_size=sequence_size,
+        model_location_generator=model_location_generator,
+        input_path=input_loc,
+    )
+
+
+@pytest.mark.parametrize("device_params", [{"l1_small_size": 24576}], indirect=True)
+@pytest.mark.parametrize("batch_size", [8])
+@pytest.mark.parametrize("sequence_size", [384])
+@pytest.mark.parametrize("model_name", ["mrm8488/bert-tiny-finetuned-squadv2"])
+@pytest.mark.parametrize(
+    "n_iterations",
+    ((1),),
+)
+def test_demo_squadv2(
+    model_name,
+    batch_size,
+    sequence_size,
+    n_iterations,
+    model_location_generator,
+    device,
+    use_program_cache,
+):
+    disable_persistent_kernel_cache()
+    disable_compilation_reports()
+
+    return run_bert_question_and_answering_inference_squad_v2(
+        device=device,
+        use_program_cache=use_program_cache,
+        model_name=model_name,
+        batch_size=batch_size,
+        sequence_size=sequence_size,
+        model_location_generator=model_location_generator,
+        n_iterations=n_iterations,
+    )