ViperEkura
1b1f1a0707
- _backend_supports now rejects fp32 for FlashAttnBackend (flash-attn only supports fp16/bf16), preventing runtime crash on fallback chain - rename test_default_backend_is_torch_native to reflect multi-backend reality - scheduler test fixture uses bf16 model (matches production, avoids unnecessary 3-step fallback chain)
305 lines
9.7 KiB
Python
305 lines
9.7 KiB
Python
"""Tests for scheduler concurrency."""
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import threading
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from unittest.mock import MagicMock, patch
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import pytest
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import torch
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from astrai.inference import InferenceScheduler
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from astrai.model.transformer import AutoRegressiveLM
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from tests.helpers import FakeTokenizer, make_rollout_config
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@pytest.fixture
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def mock_model_and_tokenizer():
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"""Create mock model and tokenizer."""
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mock_model = MagicMock()
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mock_model.config = MagicMock()
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mock_model.config.num_key_value_heads = 8
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mock_model.config.num_attention_heads = 8
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mock_model.config.hidden_size = 128
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mock_model.config.num_hidden_layers = 2
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mock_model.config.max_position_embeddings = 100
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mock_model.parameters.return_value = iter(
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[MagicMock(dtype=torch.float32, device=torch.device("cpu"))]
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)
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mock_tokenizer = MagicMock()
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mock_tokenizer.encode.return_value = [1, 2, 3, 4, 5]
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mock_tokenizer.decode.return_value = "token"
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mock_tokenizer.stop_ids = [0]
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mock_tokenizer.pad_id = None
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return mock_model, mock_tokenizer
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def test_scheduler_concurrent_add_task(mock_model_and_tokenizer):
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"""Test concurrent add_task operations."""
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mock_model, mock_tokenizer = mock_model_and_tokenizer
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with patch("astrai.inference.core.scheduler.AutoModel"):
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with patch("astrai.inference.core.scheduler.AutoTokenizer"):
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scheduler = InferenceScheduler(
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model=mock_model,
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tokenizer=mock_tokenizer,
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max_batch_size=4,
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device="cpu",
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)
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results = {"task_ids": [], "errors": []}
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lock = threading.Lock()
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def add_task_worker(worker_id):
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try:
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for i in range(10):
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task_id = scheduler.add_task(f"prompt from worker {worker_id}-{i}")
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with lock:
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results["task_ids"].append(task_id)
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except Exception as e:
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results["errors"].append(str(e))
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threads = [threading.Thread(target=add_task_worker, args=(i,)) for i in range(5)]
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for t in threads:
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t.start()
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for t in threads:
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t.join()
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scheduler.stop()
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assert len(results["errors"]) == 0, f"Errors: {results['errors']}"
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assert len(results["task_ids"]) == 50
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def test_scheduler_concurrent_add_remove_task(mock_model_and_tokenizer):
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"""Test concurrent add and remove task operations."""
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mock_model, mock_tokenizer = mock_model_and_tokenizer
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with patch("astrai.inference.core.scheduler.AutoModel"):
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with patch("astrai.inference.core.scheduler.AutoTokenizer"):
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scheduler = InferenceScheduler(
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model=mock_model,
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tokenizer=mock_tokenizer,
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max_batch_size=4,
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device="cpu",
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)
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results = {"added": [], "removed": [], "errors": []}
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add_ready = threading.Event()
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def add_worker():
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try:
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for i in range(20):
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task_id = scheduler.add_task(f"prompt {i}")
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results["added"].append(task_id)
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if len(results["added"]) >= 10:
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add_ready.set()
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except Exception as e:
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results["errors"].append(f"Add: {str(e)}")
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def remove_worker():
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try:
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add_ready.wait(timeout=5.0)
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for task_id in results["added"][:10]:
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scheduler.remove_task(task_id)
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results["removed"].append(task_id)
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except Exception as e:
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results["errors"].append(f"Remove: {str(e)}")
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add_thread = threading.Thread(target=add_worker)
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remove_thread = threading.Thread(target=remove_worker)
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add_thread.start()
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remove_thread.start()
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add_thread.join()
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remove_thread.join()
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scheduler.stop()
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assert len(results["errors"]) == 0, f"Errors: {results['errors']}"
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assert len(results["added"]) == 20
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def test_scheduler_concurrent_get_stats(mock_model_and_tokenizer):
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"""Test concurrent get_stats operations."""
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mock_model, mock_tokenizer = mock_model_and_tokenizer
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with patch("astrai.inference.core.scheduler.AutoModel"):
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with patch("astrai.inference.core.scheduler.AutoTokenizer"):
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scheduler = InferenceScheduler(
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model=mock_model,
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tokenizer=mock_tokenizer,
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max_batch_size=4,
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device="cpu",
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)
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results = {"stats": [], "errors": []}
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started = threading.Event()
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stats_done = threading.Event()
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def add_tasks():
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try:
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for i in range(20):
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scheduler.add_task(f"prompt {i}")
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started.set()
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except Exception as e:
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results["errors"].append(f"Add: {str(e)}")
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def get_stats():
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try:
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started.wait(timeout=5.0)
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for _ in range(50):
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stats = scheduler.get_stats()
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results["stats"].append(stats)
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stats_done.set()
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except Exception as e:
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results["errors"].append(f"Get stats: {str(e)}")
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add_thread = threading.Thread(target=add_tasks)
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stats_thread = threading.Thread(target=get_stats)
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add_thread.start()
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stats_thread.start()
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add_thread.join()
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stats_done.wait(timeout=5.0)
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scheduler.stop()
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stats_thread.join()
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assert len(results["errors"]) == 0, f"Errors: {results['errors']}"
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assert len(results["stats"]) == 50
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for stats in results["stats"]:
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assert "total_tasks" in stats
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assert stats["total_tasks"] >= 0
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def _make_real_scheduler(device):
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"""Build a scheduler backed by a tiny real model for run_batch tests."""
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cfg = make_rollout_config(max_position_embeddings=64)
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model = AutoRegressiveLM(cfg).to(device=device, dtype=torch.bfloat16).eval()
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tokenizer = FakeTokenizer()
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scheduler = InferenceScheduler(
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model=model,
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tokenizer=tokenizer,
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max_batch_size=8,
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max_seq_len=64,
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)
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return scheduler, tokenizer, model
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def test_run_batch_returns_token_sequences(device):
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scheduler, _tok, _model = _make_real_scheduler(device)
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try:
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prompts = [[10, 20, 30], [5, 6, 7, 8]]
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results = scheduler.run_batch(prompts, max_tokens=4, temperature=1.0)
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assert len(results) == 2
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for ids in results:
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assert isinstance(ids, list)
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assert len(ids) <= 4
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assert all(0 <= i < 200 for i in ids)
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finally:
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scheduler.stop()
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def test_run_batch_tokens_match_full_sequence_forward(device):
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scheduler, _tok, model = _make_real_scheduler(device)
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prompt = [10, 20, 30, 40]
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try:
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expected = []
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sequence = list(prompt)
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for _ in range(2):
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input_ids = torch.tensor([sequence], dtype=torch.long, device=device)
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position_ids = torch.arange(len(sequence), device=device).unsqueeze(0)
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input_mask = torch.ones(
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1, len(sequence), len(sequence), dtype=torch.bool, device=device
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).tril()
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with torch.inference_mode():
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logits = model(
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input_ids,
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input_mask=input_mask,
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position_ids=position_ids,
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)["logits"][:, -1, :]
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token = logits.argmax(dim=-1).item()
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expected.append(token)
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sequence.append(token)
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result = scheduler.run_batch(
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prompt_ids_list=[prompt], max_tokens=2, temperature=0
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)
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assert result == [expected]
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finally:
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scheduler.stop()
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def test_run_batch_return_logprobs_aligned(device):
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"""return_logprobs=True gives (token_ids, logprobs) tuples with equal len."""
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scheduler, _tok, _model = _make_real_scheduler(device)
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try:
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prompts = [[10, 20, 30, 40]]
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results = scheduler.run_batch(
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prompts, max_tokens=5, temperature=1.0, return_logprobs=True
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)
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assert len(results) == 1
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token_ids, logprobs = results[0]
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assert len(token_ids) == len(logprobs)
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assert all(lp <= 1e-5 for lp in logprobs) # logprobs ≤ 0
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finally:
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scheduler.stop()
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def test_run_batch_respects_max_tokens(device):
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scheduler, _tok, _model = _make_real_scheduler(device)
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try:
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prompts = [[10, 20, 30]]
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results = scheduler.run_batch(prompts, max_tokens=3, temperature=1.0)
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assert len(results[0]) <= 3
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finally:
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scheduler.stop()
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def test_run_batch_zero_max_tokens_returns_empty(device):
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scheduler, _tok, _model = _make_real_scheduler(device)
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try:
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assert scheduler.run_batch([[10, 20, 30]], max_tokens=0) == [[]]
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finally:
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scheduler.stop()
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def test_run_batch_stop_id_terminates(device):
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"""A token matching stop_ids terminates generation for that prompt."""
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scheduler, _tok, _model = _make_real_scheduler(device)
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try:
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prompts = [[10, 20, 30]]
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results = scheduler.run_batch(prompts, max_tokens=32, temperature=1.0)
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# If stop token 2 was produced, it is the last token
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if results[0] and results[0][-1] == 2:
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# No tokens after stop should exist (since we terminate)
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assert 2 not in results[0][:-1]
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finally:
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scheduler.stop()
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def test_run_batch_empty_prompts(device):
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"""Empty prompt list yields empty result list."""
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scheduler, _tok, _model = _make_real_scheduler(device)
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try:
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assert scheduler.run_batch([], max_tokens=4) == []
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finally:
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scheduler.stop()
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def test_run_batch_too_long_prompt_skipped(device):
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"""A prompt longer than max_seq_len yields an empty result slot."""
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scheduler, _tok, _model = _make_real_scheduler(device)
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try:
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long = list(range(100)) # > max_seq_len=64
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results = scheduler.run_batch([long, [10, 20]], max_tokens=2)
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assert results[0] == []
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assert len(results[1]) <= 2
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finally:
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scheduler.stop()
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