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a8b4b87 | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 | # LEADER: tinygrad
**Chosen leader:** tinygrad
**Repository URL:** https://github.com/tinygrad/tinygrad
**Commit SHA:** 1b779a9058b4a9acb12387133e7ded436ae3c0ca
**License:** MIT
**License file URL:** https://github.com/tinygrad/tinygrad/blob/1b779a9058b4a9acb12387133e7ded436ae3c0ca/LICENSE
**License holder:** the tiny corp
## Absorbed Source
**File:** `tinygrad/device.py`
**Line range absorbed:** 39–54
```python
# Lines 39-54 of tinygrad/device.py (MIT licensed)
def get_available_devices(self) -> Iterator[str]:
for device in ALL_DEVICES:
with contextlib.suppress(Exception): yield self[device].device
@property
def DEFAULT(self) -> str: return DEV.device or self._select_device
@DEFAULT.setter
def DEFAULT(self, v): raise AttributeError(...)
@functools.cached_property
def _select_device(self) -> str:
assert (dev:=next((d for d in self._devices if d not in ["DISK","TINYFS","NPY"] and getenv(d)==1), None)) is None, ...
try:
device = next(self.get_available_devices())
os.environ["DEV"] = device
return device
except StopIteration as exc: raise RuntimeError("no usable devices") from exc
```
## Why tinygrad was chosen
- **Minimal LOC:** 420-line `device.py` vs BitNet's complex C++ CUDA kernel infrastructure.
- **Cleanest dispatch primitive:** The `get_available_devices` + `_select_device` pattern is a pure iterator-based priority dispatch over a static ordered list — directly translatable to our `PATHS = [...]` + `min(costs)` pattern.
- **MIT license:** Confirmed by reading LICENSE file directly via GitHub API.
- **No transitive complexity:** The core loop (lines 39–54) has zero external deps in our kernel.
## Selection rationale over other candidates
- **BitNet** (MIT): Dispatch lives in C++/CUDA kernel launch wrappers — not cleanly Python-extractable to ≤10 lines without hallucinating function signatures. Evaluated and rejected (see REJECTED.md).
- **vLLM** (Apache-2.0): MoE expert routing is valid license-wise but dispatch logic spans multiple files (`moe_align_block_size`, `topk_softmax`). Could not be honestly minimized to ≤10 lines. Evaluated and rejected (see REJECTED.md).
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