SolitaryThinker
a9e5f6ee7a
Directory rename (git mv, history preserved) plus rewrite of all references: absolute imports in tests, the zero-dep runner, docstrings, comments, and the README. No behavior change. Run: python3 -m pytest v2/tests/ -q ; python3 v2/run_tests.py ; python3 -m v2.examples
47 lines
1.8 KiB
Python
47 lines
1.8 KiB
Python
"""ParallelPlan — parallelism as a model contract (design_v3 §8).
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Parallelism is not a launch flag; it affects cache keys, scheduling, transport,
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capture, and parity, so it lives on the card. Declarative, validated, compiled to a
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mesh via a ParallelDims-style builder (``parallel/mesh.py``). This module is a pure
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leaf (no card/runtime imports) so ``card/`` can hold plans without a cycle.
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"""
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from __future__ import annotations
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import hashlib
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import json
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from dataclasses import dataclass, field
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# Canonical axis names (design_v3 §8). cfgp is ≤2.
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AXIS_NAMES = ("dp", "tp", "sp", "cp", "cfgp", "pp_patch", "vae", "ep", "fsdp", "role", "replica")
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@dataclass
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class ParallelPlan:
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axes: dict[str, int] = field(default_factory=dict) # e.g. {"tp": 2, "sp": 4, "cfgp": 2}
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mesh_order: list[str] = field(default_factory=list)
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placement: str = "colocated"
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communication: dict[str, str] = field(default_factory=dict)
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# design_v3 §8 + omni-readiness §4b: applicability conditions travel with axes
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applicability: dict[str, dict] = field(default_factory=dict)
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per_axis_communication: dict[str, str] = field(default_factory=dict)
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def degree(self, axis: str) -> int:
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return int(self.axes.get(axis, 1))
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def world_size(self) -> int:
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w = 1
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for v in self.axes.values():
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w *= int(v)
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return max(w, 1)
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@property
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def hash(self) -> str:
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"""Stable hash — part of the CacheKey (design_v3 §7.1: parallel_plan_hash)."""
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payload = json.dumps({"axes": self.axes, "order": self.mesh_order}, sort_keys=True)
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return hashlib.sha256(payload.encode()).hexdigest()[:16]
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@classmethod
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def single(cls) -> "ParallelPlan":
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"""The default deployment: one device, all degree-one trivial groups."""
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return cls(axes={"dp": 1}, mesh_order=["dp"])
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