import pytest import torch from copy import copy from transformers import AutoTokenizer from text_generation_server.pb import generate_pb2 from text_generation_server.models.causal_lm import CausalLM, CausalLMBatch @pytest.fixture(scope="session") def default_causal_lm(): return CausalLM("gpt2") @pytest.fixture(scope="session") def gpt2_tokenizer(): tokenizer = AutoTokenizer.from_pretrained("gpt2", padding_side="left") tokenizer.pad_token_id = 50256 return tokenizer @pytest.fixture def default_pb_request(default_pb_parameters, default_pb_stop_parameters): return generate_pb2.Request( id=0, inputs="Test", input_chunks=generate_pb2.Input(chunks=[generate_pb2.InputChunk(text="Test")]), prefill_logprobs=True, truncate=100, parameters=default_pb_parameters, stopping_parameters=default_pb_stop_parameters, ) @pytest.fixture def default_pb_batch(default_pb_request): return generate_pb2.Batch(id=0, requests=[default_pb_request], size=1) @pytest.fixture def default_causal_lm_batch(default_pb_batch, gpt2_tokenizer): return CausalLMBatch.from_pb( default_pb_batch, gpt2_tokenizer, torch.float32, torch.device("cpu") ) @pytest.fixture def default_multi_requests_causal_lm_batch(default_pb_request, gpt2_tokenizer): req_0 = copy(default_pb_request) req_0.id = 1 req_1 = default_pb_request req_1.id = 2 req_1.stopping_parameters.max_new_tokens = 5 batch_pb = generate_pb2.Batch(id=1, requests=[req_0, req_1], size=2) return CausalLMBatch.from_pb( batch_pb, gpt2_tokenizer, torch.float32, torch.device("cpu") ) def test_batch_from_pb(default_pb_batch, default_causal_lm_batch): batch = default_causal_lm_batch assert batch.batch_id == default_pb_batch.id assert batch.requests == default_pb_batch.requests assert len(batch.input_ids) == default_pb_batch.size assert batch.input_ids[0][-1] == 14402 assert torch.all(batch.input_ids[0][:-1] == 50256) assert batch.attention_mask[0, 0] == 1 assert torch.all(batch.attention_mask[0, 1:] == 0) assert batch.past_key_values is None assert all( [ torch.equal(input_ids, all_input_ids[:, 0]) for input_ids, all_input_ids in zip(batch.input_ids, batch.all_input_ids) ] ) assert batch.input_lengths == [1] assert len(batch) == default_pb_batch.size assert len(batch.next_token_choosers) == len(batch.stopping_criterias) == len(batch) assert batch.max_input_length == batch.input_lengths[0] def test_batch_concatenate_no_prefill(default_causal_lm_batch): with pytest.raises(ValueError): CausalLMBatch.concatenate([default_causal_lm_batch, default_causal_lm_batch]) def test_causal_lm_batch_type(default_causal_lm): assert default_causal_lm.batch_type == CausalLMBatch def test_causal_lm_generate_token(default_causal_lm, default_causal_lm_batch): sequence_length = len(default_causal_lm_batch.all_input_ids[0]) generations, next_batch, _ = default_causal_lm.generate_token( default_causal_lm_batch ) assert len(generations) == len(next_batch) assert isinstance(next_batch, CausalLMBatch) assert len(next_batch.all_input_ids) == len(next_batch) assert len(next_batch.all_input_ids[0]) == sequence_length + 1 assert len(next_batch.attention_mask[0]) == 11 assert next_batch.all_input_ids[0][-1] == 13 assert next_batch.all_input_ids[0][-2] == 14402 assert torch.all(next_batch.all_input_ids[0][:-2] == 50256) assert torch.all(next_batch.attention_mask[0][0:2] == 1) assert torch.all(next_batch.attention_mask[0][2:] == 0) assert next_batch.input_ids.shape == (len(next_batch), 1) assert next_batch.input_ids[0, 0] == 13 assert next_batch.input_lengths == [2] assert next_batch.max_input_length == next_batch.input_lengths[0] assert next_batch.past_key_values is not None assert all( [p[0].shape == (1, 12, sequence_length, 64) for p in next_batch.past_key_values] ) assert all( [p[1].shape == (1, 12, sequence_length, 64) for p in next_batch.past_key_values] ) assert all([generation.generated_text is None for generation in generations]) assert all([len(generation.prefill_tokens) == 1 for generation in generations]) assert all( [ token_id.item() == 13 for generation in generations for token_id in generation.tokens.token_ids ] ) assert all( [ token_text == "." for generation in generations for token_text in generation.tokens.texts ] ) assert generations[0].request_id == 0 def test_causal_lm_generate_token_completion( default_causal_lm, default_causal_lm_batch ): next_batch = default_causal_lm_batch for _ in range(default_causal_lm_batch.stopping_criterias[0].max_new_tokens - 1): generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert len(generations) == len(next_batch) generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert next_batch is None assert len(generations) == 1 assert generations[0].generated_text.text == ".java:784) at net.minecraft." assert generations[0].request_id == default_causal_lm_batch.requests[0].id assert ( generations[0].generated_text.generated_tokens == default_causal_lm_batch.stopping_criterias[0].max_new_tokens ) def test_causal_lm_generate_token_completion_multi( default_causal_lm, default_multi_requests_causal_lm_batch ): next_batch = default_multi_requests_causal_lm_batch for i in range( default_multi_requests_causal_lm_batch.stopping_criterias[1].max_new_tokens - 1 ): generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert len(generations) == len(next_batch) generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert next_batch is not None assert len(generations) == 2 assert generations[1].generated_text.text == ".java:784)" assert ( generations[1].request_id == default_multi_requests_causal_lm_batch.requests[1].id ) assert ( generations[1].generated_text.generated_tokens == default_multi_requests_causal_lm_batch.stopping_criterias[1].max_new_tokens ) # Copy stopping_criterias before filtering stopping_criterias = ( default_multi_requests_causal_lm_batch.stopping_criterias.copy() ) next_batch = next_batch.filter([next_batch.requests[0].id]) for _ in range( stopping_criterias[0].max_new_tokens - stopping_criterias[1].max_new_tokens - 1 ): generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert len(generations) == len(next_batch) generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert next_batch is None assert len(generations) == 1 assert generations[0].generated_text.text == ".java:784) at net.minecraft." assert ( generations[0].request_id == default_multi_requests_causal_lm_batch.requests[0].id ) assert ( generations[0].generated_text.generated_tokens == default_multi_requests_causal_lm_batch.stopping_criterias[0].max_new_tokens ) def test_batch_concatenate( default_causal_lm, default_causal_lm_batch, default_multi_requests_causal_lm_batch ): next_batch_0 = default_causal_lm_batch _, next_batch_0, _ = default_causal_lm.generate_token(next_batch_0) _, next_batch_0, _ = default_causal_lm.generate_token(next_batch_0) next_batch_1 = default_multi_requests_causal_lm_batch _, next_batch_1, _ = default_causal_lm.generate_token(next_batch_1) # Clone past_key_values before concatenating to compare after, # because they are removed from the concatenated batches next_batch_0_past_key_values = [ (k.clone(), v.clone()) for (k, v) in next_batch_0.past_key_values ] next_batch_1_past_key_values = [ (k.clone(), v.clone()) for (k, v) in next_batch_1.past_key_values ] next_batch = CausalLMBatch.concatenate([next_batch_0, next_batch_1]) assert torch.equal(next_batch.all_input_ids[0], next_batch_0.all_input_ids[0]) assert torch.equal(next_batch.all_input_ids[1], next_batch_1.all_input_ids[0]) assert torch.equal(next_batch.all_input_ids[2], next_batch_1.all_input_ids[1]) assert torch.all( next_batch.attention_mask[0, : -next_batch.padding_right_offset] == 1 ) assert torch.all( next_batch.attention_mask[1:, 1 : -next_batch.padding_right_offset] == 1 ) assert torch.all(next_batch.attention_mask[1:, 3:] == 0) assert next_batch.batch_id == 0 assert next_batch.input_ids[0, 0] == 12355 assert torch.all(next_batch.input_ids[1:] == 13) assert next_batch.input_lengths == [3, 2, 2] assert next_batch.max_input_length == 3 assert next_batch.requests[0] == next_batch_0.requests[0] assert next_batch.requests[1:] == next_batch_1.requests assert next_batch.next_token_choosers[0] == next_batch_0.next_token_choosers[0] assert next_batch.next_token_choosers[1:] == next_batch_1.next_token_choosers assert next_batch.stopping_criterias[0] == next_batch_0.stopping_criterias[0] assert next_batch.stopping_criterias[1:] == next_batch_1.stopping_criterias assert next_batch.past_key_values is not None assert all([p[0].shape == (3, 12, 2, 64) for p in next_batch.past_key_values]) assert all([p[1].shape == (3, 12, 2, 64) for p in next_batch.past_key_values]) for i, past in enumerate(next_batch.past_key_values): assert torch.equal(next_batch_0_past_key_values[i][0][0, :, -2:], past[0][0]) assert torch.equal( next_batch_1_past_key_values[i][0][:, :, -1:], past[0][1:, :, -1:, :] ) assert torch.equal(next_batch_0_past_key_values[i][1][0, :, -2:], past[1][0]) assert torch.equal( next_batch_1_past_key_values[i][1][:, :, -1:], past[1][1:, :, -1:, :] ) for _ in range( default_multi_requests_causal_lm_batch.stopping_criterias[1].max_new_tokens - 2 ): generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert len(generations) == len(next_batch) generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert next_batch is not None assert len(generations) == 3 assert generations[2].generated_text.text == ".java:784)" assert ( generations[2].request_id == default_multi_requests_causal_lm_batch.requests[1].id ) assert ( generations[2].generated_text.generated_tokens == default_multi_requests_causal_lm_batch.stopping_criterias[1].max_new_tokens ) next_batch = next_batch.filter( [next_batch.requests[0].id, next_batch.requests[1].id] ) for _ in range( default_causal_lm_batch.stopping_criterias[0].max_new_tokens - default_multi_requests_causal_lm_batch.stopping_criterias[1].max_new_tokens - 2 ): generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert len(generations) == len(next_batch) generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert next_batch is not None assert len(generations) == 2 assert generations[0].generated_text.text == ".java:784) at net.minecraft." assert generations[0].request_id == default_causal_lm_batch.requests[0].id assert ( generations[0].generated_text.generated_tokens == default_causal_lm_batch.stopping_criterias[0].max_new_tokens ) next_batch = next_batch.filter([next_batch.requests[1].id]) for _ in range( default_multi_requests_causal_lm_batch.stopping_criterias[0].max_new_tokens - default_causal_lm_batch.stopping_criterias[0].max_new_tokens - default_multi_requests_causal_lm_batch.stopping_criterias[1].max_new_tokens - 4 ): generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert len(generations) == len(next_batch) generations, next_batch, _ = default_causal_lm.generate_token(next_batch) assert next_batch is None assert len(generations) == 1 assert generations[0].generated_text.text == ".java:784) at net.minecraft." assert ( generations[0].request_id == default_multi_requests_causal_lm_batch.requests[0].id ) assert ( generations[0].generated_text.generated_tokens == default_multi_requests_causal_lm_batch.stopping_criterias[0].max_new_tokens )