320 lines
12 KiB
Python
320 lines
12 KiB
Python
"""Unit tests for runtime_context: delegation, singletons, and override()."""
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from sglang.test.ci.ci_register import register_cpu_ci
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register_cpu_ci(est_time=5, suite="base-a-test-cpu")
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import dataclasses
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import unittest
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from unittest.mock import patch
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import sglang.srt.server_args as server_args_module
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from sglang.srt.arg_groups.arg_utils import A, Arg
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from sglang.srt.runtime_context import (
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Flags,
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ParallelContext,
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RuntimeContext,
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_FlagGroupBase,
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get_context,
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get_flags,
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get_parallel,
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get_server_args,
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reset_context,
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)
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from sglang.test.test_utils import CustomTestCase
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_PS = "sglang.srt.distributed.parallel_state"
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_DP = "sglang.srt.layers.dp_attention"
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SIZE_RANK_DELEGATIONS = [
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("world_size", f"{_PS}.get_world_size"),
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("world_rank", f"{_PS}.get_world_rank"),
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("tp_size", f"{_PS}.get_tensor_model_parallel_world_size"),
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("tp_rank", f"{_PS}.get_tensor_model_parallel_rank"),
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("pp_size", f"{_PS}.get_pipeline_model_parallel_world_size"),
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("pp_rank", f"{_PS}.get_pipeline_model_parallel_rank"),
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("moe_ep_size", f"{_PS}.get_moe_expert_parallel_world_size"),
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("moe_ep_rank", f"{_PS}.get_moe_expert_parallel_rank"),
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("moe_dp_size", f"{_PS}.get_moe_data_parallel_world_size"),
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("moe_dp_rank", f"{_PS}.get_moe_data_parallel_rank"),
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("moe_tp_size", f"{_PS}.get_moe_tensor_parallel_world_size"),
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("moe_tp_rank", f"{_PS}.get_moe_tensor_parallel_rank"),
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("attn_tp_size", f"{_PS}.get_attn_tensor_model_parallel_world_size"),
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("attn_tp_rank", f"{_PS}.get_attn_tensor_model_parallel_rank"),
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("attn_cp_size", f"{_PS}.get_attn_context_model_parallel_world_size"),
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("attn_cp_rank", f"{_PS}.get_attn_context_model_parallel_rank"),
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("attn_dp_size", f"{_DP}.get_attention_dp_size"),
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("attn_dp_rank", f"{_DP}.get_attention_dp_rank"),
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]
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GROUP_DELEGATIONS = [
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("world_group", f"{_PS}.get_world_group"),
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("tp_group", f"{_PS}.get_tp_group"),
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("pp_group", f"{_PS}.get_pp_group"),
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("moe_ep_group", f"{_PS}.get_moe_ep_group"),
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("moe_dp_group", f"{_PS}.get_moe_dp_group"),
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("moe_tp_group", f"{_PS}.get_moe_tp_group"),
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("attn_tp_group", f"{_PS}.get_attn_tp_group"),
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("attn_cp_group", f"{_PS}.get_attn_cp_group"),
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]
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class TestRuntimeContextSingletons(CustomTestCase):
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def test_singletons(self):
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self.assertIs(get_parallel(), get_parallel())
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self.assertIsInstance(get_parallel(), ParallelContext)
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self.assertIsInstance(get_context(), RuntimeContext)
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self.assertIs(get_context().parallel, get_parallel())
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class _IsolatedOverrides(CustomTestCase):
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"""Give each test a clean override map, restoring afterward only the overrides
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installed outside it (e.g. by another test file sharing the process)."""
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def setUp(self):
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super().setUp()
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p = get_parallel()
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self._saved_overrides = dict(p._overrides)
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p._overrides.clear()
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def tearDown(self):
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p = get_parallel()
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p._overrides.clear()
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p._overrides.update(self._saved_overrides)
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super().tearDown()
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class TestParallelDelegation(_IsolatedOverrides):
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def test_size_rank_delegate_to_canonical_getters(self):
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# Patch each getter to a distinct sentinel: a miswired attribute would read
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# a different (unpatched) getter and fail.
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for i, (attr, target) in enumerate(SIZE_RANK_DELEGATIONS):
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sentinel = 1000 + i
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with patch(target, return_value=sentinel):
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self.assertEqual(
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getattr(get_parallel(), attr),
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sentinel,
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msg=f"{attr} must delegate to {target}",
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)
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def test_groups_delegate_to_canonical_getters(self):
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for attr, target in GROUP_DELEGATIONS:
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sentinel = object()
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with patch(target, return_value=sentinel):
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self.assertIs(
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getattr(get_parallel(), attr),
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sentinel,
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msg=f"{attr} must delegate to {target}",
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)
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def test_wrapper_holds_no_resolved_state(self):
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# __slots__: no __dict__; the only instance state is the override hook.
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self.assertFalse(hasattr(get_parallel(), "__dict__"))
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# tp_group IS exposed: live delegation handles PD-multiplexing / the tp patch.
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self.assertTrue(hasattr(ParallelContext, "tp_group"))
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# local_attn_dp is intentionally not part of the wrapper surface.
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self.assertFalse(hasattr(ParallelContext, "local_attn_dp_size"))
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class TestParallelOverride(_IsolatedOverrides):
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def test_override_takes_precedence(self):
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p = get_parallel()
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with p.override(tp_size=99, tp_rank=3, attn_dp_size=8):
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self.assertEqual(p.tp_size, 99)
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self.assertEqual(p.tp_rank, 3)
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self.assertEqual(p.attn_dp_size, 8)
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# same singleton: a fresh get_parallel() sees the override too
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self.assertEqual(get_parallel().tp_size, 99)
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self.assertEqual(p._overrides, {})
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def test_override_can_force_groups(self):
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sentinel = object()
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with get_parallel().override(tp_group=sentinel):
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self.assertIs(get_parallel().tp_group, sentinel)
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def test_override_nests_and_restores(self):
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p = get_parallel()
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with p.override(tp_size=2):
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self.assertEqual(p.tp_size, 2)
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with p.override(tp_size=4, pp_size=2):
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self.assertEqual(p.tp_size, 4)
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self.assertEqual(p.pp_size, 2)
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self.assertEqual(p.tp_size, 2)
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self.assertNotIn("pp_size", p._overrides)
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def test_override_unknown_key_raises_and_does_not_mutate(self):
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p = get_parallel()
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with self.assertRaises(ValueError):
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with p.override(tp_sizee=1): # typo
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pass
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self.assertEqual(p._overrides, {})
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class _IsolatedServerArgs(CustomTestCase):
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"""Save/restore the published ServerArgs around each test (the slot is
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process-global; another test file sharing the process may have published)."""
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def setUp(self):
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super().setUp()
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self._saved_server_args = get_context()._server_args
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def tearDown(self):
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if self._saved_server_args is None:
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reset_context()
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else:
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get_context().set_server_args(self._saved_server_args)
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super().tearDown()
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class TestServerArgsOwnership(_IsolatedServerArgs):
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"""V2b: the context owns the slot; the legacy getters are identity shims."""
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def test_legacy_setter_publishes_into_context(self):
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# Identity (not equality) is the contract; publish accepts any object.
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sentinel = object()
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server_args_module.set_global_server_args_for_scheduler(sentinel)
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self.assertIs(server_args_module.get_global_server_args(), sentinel)
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self.assertIs(get_server_args(), sentinel)
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self.assertIs(get_context().server_args, sentinel)
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def test_context_publish_visible_through_legacy_getter(self):
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sentinel = object()
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get_context().set_server_args(sentinel)
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self.assertIs(server_args_module.get_global_server_args(), sentinel)
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def test_tokenizer_alias_is_same_function(self):
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self.assertIs(
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server_args_module.set_global_server_args_for_tokenizer,
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server_args_module.set_global_server_args_for_scheduler,
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)
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def test_pre_publish_error_verbatim(self):
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reset_context()
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for accessor in (get_server_args, server_args_module.get_global_server_args):
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with self.assertRaises(ValueError) as cm:
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accessor()
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self.assertEqual(str(cm.exception), "Global server args is not set yet!")
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def test_republish_overwrite_allowed(self):
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first, second = object(), object()
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server_args_module.set_global_server_args_for_scheduler(first)
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server_args_module.set_global_server_args_for_scheduler(second)
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self.assertIs(get_server_args(), second)
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def test_reset_context_clears_owned_store(self):
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server_args_module.set_global_server_args_for_scheduler(object())
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reset_context()
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with self.assertRaises(ValueError):
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get_server_args()
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def test_module_global_removed(self):
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# The legacy storage must not survive: a stale _global_server_args would
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# silently fork the config into two objects.
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self.assertFalse(hasattr(server_args_module, "_global_server_args"))
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@dataclasses.dataclass
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class _FakeCaptureGroup(_FlagGroupBase):
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gamma: int = 0
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class TestFlagsTier(_IsolatedServerArgs):
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"""Runtime-flags tier: typed groups, typo-safe writes, override primitive.
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Resolved configuration lives on server_args fields (materialized at the
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end of __post_init__); the flags tier only carries runtime state
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(today: the capture lifecycle)."""
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def test_wiring_and_groups(self):
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flags = get_flags()
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self.assertIs(flags, get_context().flags)
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self.assertIsInstance(flags, Flags)
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self.assertTrue(hasattr(flags, "capture"))
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def test_typo_safety(self):
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group = _FakeCaptureGroup()
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with self.assertRaises(AttributeError):
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group.gamma_misspelled = 2 # undeclared leaf
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with self.assertRaises(AttributeError):
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get_flags().not_a_flag = 1
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def test_override_is_transactional(self):
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group = _FakeCaptureGroup()
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with group.override(gamma=99):
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self.assertEqual(group.gamma, 99)
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self.assertEqual(group.gamma, 0)
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with self.assertRaises(ValueError):
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with group.override(gamma=2, delta=3): # delta undeclared
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pass
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self.assertEqual(group.gamma, 0) # validated before any write
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def test_reset_context_installs_fresh_flags(self):
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old = get_flags()
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old.capture.enable_torch_compile = True
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reset_context()
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self.assertIsNot(get_flags(), old)
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self.assertFalse(get_flags().capture.enable_torch_compile)
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@dataclasses.dataclass
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class _FakeResolvedArgs:
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"""Publishable fixture with a resolvable whitelist (real flat leaves)."""
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page_size: A[int | None, Arg(help="p", resolvable=True)] = None
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sampling_backend: A[str | None, Arg(help="s", resolvable=True)] = None
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_resolved_overrides: list = dataclasses.field(default_factory=list)
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class TestPublishLifecycle(_IsolatedServerArgs):
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"""Publish installs the resolved server_args and seeds the capture tier."""
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def _publish(self, **kw):
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args = _FakeResolvedArgs(**kw)
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get_context().set_server_args(args)
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return args
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def test_capture_tier_seeded_at_publish(self):
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args = self._publish(page_size=1)
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args.enable_torch_compile = True
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get_context().set_server_args(args) # re-publish picks up the value
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self.assertTrue(get_flags().capture.enable_torch_compile)
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# capture-time write (B4) targets the capture leaf
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get_flags().capture.enable_torch_compile = False
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self.assertFalse(get_flags().capture.enable_torch_compile)
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def test_capture_tier_defaults_for_sentinel_publish(self):
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get_context().set_server_args(object())
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self.assertFalse(get_flags().capture.enable_torch_compile)
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def test_declare_load_time_override_writes_through(self):
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from sglang.srt.arg_groups.overrides import declare_load_time_override
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args = self._publish(page_size=1)
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declare_load_time_override("model.load_time", {"page_size": 64})
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self.assertEqual(args.page_size, 64)
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def test_declare_load_time_override_validates_whitelist(self):
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from sglang.srt.arg_groups.overrides import declare_load_time_override
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args = self._publish(page_size=1)
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with self.assertRaises(ValueError):
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declare_load_time_override("bad", {"nope": 1})
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self.assertEqual(args.page_size, 1)
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def test_declare_load_time_override_records_provenance(self):
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from sglang.srt.arg_groups.overrides import declare_load_time_override
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from sglang.srt.server_args import ServerArgs
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class _Args(_FakeResolvedArgs):
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override = ServerArgs.override
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args = _Args(page_size=1)
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get_context().set_server_args(args)
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declare_load_time_override("model.load_time", {"page_size": 64})
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self.assertEqual(args.page_size, 64)
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self.assertIn(("model.load_time", {"page_size": 64}), args._resolved_overrides)
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if __name__ == "__main__":
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unittest.main()
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