Files
CelerisLab/tests/validation/taylor_green/run_case.py
T
ClaudeandClaude Opus 5.5 caa573f978 test: adopt native-validated 24-target probe layout
Horizontal y=56 and vertical x=38 through box 1, normal coordinates
[12.5..26.125] (root128 physical). Nearest-ACTIVE mapping with
deterministic tie rule (distance, finer level, smaller j, smaller i),
duplicate-cell rejection, stored centers and displacements. Replaces my
earlier offsets, which mapped two target pairs to the same U128 cell.
U512 spacing 128/512 and root step r -> U512 step 4r unchanged.
Tests: 24 unique cells per case, nested 3 L0 + 5 L1 + 4 L2 per transect,
U128 max displacement 0.625.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-19 03:13:43 +00:00

466 lines
22 KiB
Python

"""One bounded GPU case, with explicit opt-in experimental explosion."""
import argparse
import hashlib
import json
import os
import shutil
from pathlib import Path
import subprocess
import sys
import time
import numpy as np
from oracle import U, TIMES, LIMITS, initial, metrics, rectangles
NUMERICAL_REVISION = "a135252ae78b47b57d7e77d19001700b3bedac8b"
SOURCE_SHA256 = "a5dbfd804befce868067d79a23e5fd47dce7f505b3f9b1bb2145fb57cb5f2178"
BUILD_CAPTURE_SHA256 = "3dbaa6547cb0a4cb1541054f3b64ad8b6e18cc70527ac6166e56b944e9bd464a"
REFERENCE_HARNESS = "11901a7f77557a901e017a171eeae1758d584fa5"
INITIALIZATION = "physical FP64 equilibrium G at actual cell centers; rho=1+3p"
SHEAR_WAVE_SHA256 = "81d5c8ee60864372887cddf9239580c82fb6750d956038f1e3ee9de61aa4e877"
SCALED_DIAGNOSTIC = "scaled_n256"
SCALED_SHEAR = "scaled_shear_n256" # mutually exclusive with scaled_n256 (one flow each)
NESTED_SHEAR = "nested_shear_n128" # fixed three-level/two-region shear preset
SHEAR_NESTED_SHA256 = "fa6cfe87fb4df8c6d732c637c885276833c81973b950c7724d734f8fc350bcb0"
TWIN_SHEAR = "twin_shear_n128" # depth-2 twin: nested L0->L1 boxes without L2
SHEAR_TWIN_SHA256 = "1cbf37f18e89aea577581631c4565f51e68d22a3739b698816ef64acbf2b2bb4"
SHEAR_PROBES_SHA256 = "53ba8af8ac9c8078c40f84488c7ade4c11ccc91dd1fc275ff806042e9af30166" # signed interface-probe mechanism diagnostic
def flow_functions(flow="taylor_green"):
"""(initial, metrics, limits, initialization); the default is the frozen TG oracle."""
if flow == "taylor_green":
return initial, metrics, LIMITS, INITIALIZATION
if flow == "shear_wave":
import shear_wave
return shear_wave.initial, shear_wave.metrics, shear_wave.LIMITS, shear_wave.INITIALIZATION
raise ValueError(f"unknown flow {flow!r}")
def finite_row(row):
"""Every scalar or list-valued diagnostic is finite (TG rows are all scalars)."""
return all(np.isfinite(np.asarray(value, dtype=float)).all() for value in row.values())
def sample(run, masks, step, n, viscosity, initial_mass, metrics, depth, label="sample"):
arrays = (run.download(),) if depth == 1 else run.download()
row = metrics(arrays, masks, step, n, viscosity, initial_mass)
if not finite_row(row):
raise FloatingPointError(f"nonfinite {label} diagnostics")
return row
def sample_steps(n, early_pressure=False):
"""Root synchronization steps; early ladder matches the 707afe6 diagnostic."""
main = [round(tstar * n / U) for tstar in TIMES]
early = list(range(0, 4 * n + 1, n // 16)) if early_pressure else []
return main, early
def runtime_source(repo):
"""Fail before CUDA if Python or the compiler snapshot comes from another tree."""
import CelerisLab
from CelerisLab.cuda import compiler_v2
paths = dict(module=Path(CelerisLab.__file__).resolve(),
compiler=Path(compiler_v2.__file__).resolve(),
kernel_root=Path(compiler_v2.kernel_path("blocks.cu")).resolve().parent)
package = repo / "src/CelerisLab"
expected = dict(module=package / "__init__.py", compiler=package / "cuda/compiler_v2.py",
kernel_root=package / "lbm/kernels")
if paths != expected:
raise RuntimeError("Wrong imported source or CUDA source/include root")
return dict(checkout=str(repo), **{key: str(path) for key, path in paths.items()})
def provenance(repo):
git = lambda *a: subprocess.check_output(
["git", "-C", str(repo), *a], text=True
).strip()
source_hash = hashlib.sha256()
for path in sorted((repo / "src").rglob("*")):
if path.is_file() and "__pycache__" not in path.parts and path.suffix != ".pyc":
source_hash.update(
str(path.relative_to(repo)).encode() + b"\0" + path.read_bytes() + b"\0"
)
return dict(
revision=git("rev-parse", "HEAD"),
dirty=bool(git("status", "--porcelain")),
source_tree_sha256=source_hash.hexdigest(),
harness_sha256={
p.name: hashlib.sha256(p.read_bytes()).hexdigest()
for p in Path(__file__).parent.glob("*.py")
},
)
def verify_source(repo, revision, flow="taylor_green", probes=False):
"""Exact clean harness commit, fixed production tree, and reviewed capture helper."""
import oracle
from tests.validation.multigrid import check_projected_pairs as gate
harness = repo / "tests/validation/taylor_green"
if (Path(__file__).resolve() != harness / "run_case.py"
or Path(oracle.__file__).resolve() != harness / "oracle.py"):
raise RuntimeError("Wrong runner or oracle checkout")
helper = repo / "tests/validation/multigrid/check_projected_pairs.py"
if (Path(gate.__file__).resolve() != helper
or hashlib.sha256(helper.read_bytes()).hexdigest() != BUILD_CAPTURE_SHA256):
raise RuntimeError("Wrong build-capture helper")
if gate.preflight(repo, revision, "candidate") != NUMERICAL_REVISION:
raise RuntimeError("Wrong production revision")
result = provenance(repo)
if result["source_tree_sha256"] != SOURCE_SHA256:
raise RuntimeError("Wrong numerical source fingerprint")
result["build_capture_sha256"] = BUILD_CAPTURE_SHA256
if probes:
import shear_probes
module = harness / "shear_probes.py"
if (Path(shear_probes.__file__).resolve() != module
or hashlib.sha256(module.read_bytes()).hexdigest() != SHEAR_PROBES_SHA256):
raise RuntimeError("Wrong shear_probes module checkout or content")
result["shear_probes_sha256"] = SHEAR_PROBES_SHA256
if flow == "shear_twin":
import shear_twin
module = harness / "shear_twin.py"
if (Path(shear_twin.__file__).resolve() != module
or hashlib.sha256(module.read_bytes()).hexdigest() != SHEAR_TWIN_SHA256):
raise RuntimeError("Wrong shear_twin module checkout or content")
result["shear_twin_sha256"] = SHEAR_TWIN_SHA256
if flow in ("shear_nested", "shear_twin"): # the twin reuses the nested geometry
import shear_nested
module = harness / "shear_nested.py"
if (Path(shear_nested.__file__).resolve() != module
or hashlib.sha256(module.read_bytes()).hexdigest() != SHEAR_NESTED_SHA256):
raise RuntimeError("Wrong shear_nested module checkout or content")
result["shear_nested_sha256"] = SHEAR_NESTED_SHA256
if flow in ("shear_wave", "shear_nested", "shear_twin"):
import shear_wave
module = harness / "shear_wave.py"
if (Path(shear_wave.__file__).resolve() != module
or hashlib.sha256(module.read_bytes()).hexdigest() != SHEAR_WAVE_SHA256):
raise RuntimeError("Wrong shear_wave module checkout or content")
result["shear_wave_sha256"] = SHEAR_WAVE_SHA256
return result
def build_capture(report, save):
from tests.validation.multigrid.check_projected_pairs import capture_builds
return capture_builds(report, save)
def runtime_identity(ctx):
import pycuda
import pycuda.driver as cuda
nvcc = shutil.which("nvcc") or "/usr/local/cuda/bin/nvcc"
return dict(device=dict(name=ctx.device.name(), pci_bus_id=ctx.device.pci_bus_id(),
capability=list(ctx.device.compute_capability()),
driver=cuda.get_driver_version(), runtime=list(cuda.get_version())),
nvcc_path=str(Path(nvcc).resolve()),
nvcc_version=subprocess.check_output([nvcc, "--version"], text=True).strip(),
python=sys.version, numpy=np.__version__, pycuda=pycuda.VERSION_TEXT)
def config(n, re):
from CelerisLab.config import LBMConfig
cfg = LBMConfig(
nx=n,
ny=n,
viscosity=U * n / re,
velocity=0.0,
rho=1.0,
lattice_model="D2Q9",
collision="SRT",
streaming="double_buffer",
store_precision="FP32",
ddf_shifting=True,
les_enabled=False,
)
cfg.validate()
return cfg
def workload(masks, base_steps):
cells = [int(np.count_nonzero(m)) for m in masks]
hops = [base_steps * 2**level for level in range(len(masks))]
updates = [count * hop for count, hop in zip(cells, hops)]
return dict(
active_cells_by_level=cells,
level_hops=hops,
active_collision_updates_by_level=updates,
active_collision_updates=sum(updates),
root_intervals=base_steps,
excludes="ghost streaming, halo copies, transfers, initialization and diagnostics",
)
def main():
p = argparse.ArgumentParser(description=__doc__)
p.add_argument("--repo", type=Path, required=True)
p.add_argument("--expected-revision", required=True)
p.add_argument("--run-gpu", action="store_true")
p.add_argument("--dry-run", action="store_true")
p.add_argument("--re", type=int, choices=[100, 1000], required=True)
p.add_argument("--n", type=int, choices=[32, 64, 128, 256, 512], required=True)
p.add_argument("--depth", type=int, choices=[1, 2, 3], required=True)
p.add_argument("--output", type=Path, required=True)
p.add_argument("--explosion", choices=["constant", "projected_linear"], default="constant")
p.add_argument("--diagnostic",
choices=[SCALED_DIAGNOSTIC, SCALED_SHEAR, NESTED_SHEAR, TWIN_SHEAR],
help="explicit four-case N256/fine512 same-placement diagnostic "
"(scaled_n256: Taylor-Green; scaled_shear_n256: shear wave) or the "
"fixed three-level/two-region shear preset (nested_shear_n128) "
"or its depth-2 twin (twin_shear_n128)")
p.add_argument("--probe-trace", action="store_true",
help="signed interface-probe trace (nested U128/U512/projected d3, "
"twin projected d2); mechanism diagnostic, no gates")
p.add_argument("--final-snapshot", action="store_true",
help="nested_shear_n128 projected depth-3 only: final macro snapshot")
p.add_argument("--early-pressure", action="store_true",
help="also save 65 scalar pressure samples at t*=k*.001875, k=0..64")
p.add_argument("--flow", choices=["taylor_green", "shear_wave"], default="taylor_green")
args = p.parse_args()
nested = args.diagnostic == NESTED_SHEAR
if args.flow == "shear_wave" and (args.re != 100 or (args.depth == 3 and not nested)
or args.early_pressure):
p.error("shear_wave requires --re 100, depth 1 or 2 and no --early-pressure")
probe_cases = {(NESTED_SHEAR, 128, 1, "constant"), (NESTED_SHEAR, 512, 1, "constant"),
(NESTED_SHEAR, 128, 3, "projected_linear"),
(TWIN_SHEAR, 128, 2, "projected_linear")}
if args.probe_trace and (args.final_snapshot or (
args.diagnostic, args.n, args.depth, args.explosion) not in probe_cases):
p.error("--probe-trace requires nested U128/U512/projected depth 3 or twin projected "
"depth 2, without --final-snapshot")
if args.final_snapshot and not (nested and args.depth == 3
and args.explosion == "projected_linear"):
p.error("--final-snapshot requires nested_shear_n128 projected depth 3")
initial, metrics, limits, initialization = flow_functions(args.flow)
if args.output.exists():
p.error("Output already exists; choose a new path to retain prior evidence")
if args.explosion != "constant" and args.depth != 2 and not nested:
p.error("projected_linear requires depth 2")
twin = args.diagnostic == TWIN_SHEAR
if nested or twin:
import shear_nested
import shear_twin
preset = shear_nested if nested else shear_twin
if args.flow != "shear_wave":
p.error(f"--diagnostic {args.diagnostic} requires --flow shear_wave")
if (args.re, args.n, args.depth, args.explosion) not in preset.CASES:
p.error(f"{args.diagnostic} requires one of its four Re100 cases")
elif args.diagnostic:
cases = {(256, 1, "constant"), (512, 1, "constant"),
(256, 2, "constant"), (256, 2, "projected_linear")}
flow = "shear_wave" if args.diagnostic == SCALED_SHEAR else "taylor_green"
if args.flow != flow:
p.error(f"--diagnostic {args.diagnostic} requires --flow {flow}")
if args.diagnostic == SCALED_DIAGNOSTIC and (
args.re != 100 or (args.n, args.depth, args.explosion) not in cases
or not args.early_pressure):
p.error("scaled_n256 requires one of its four Re100 cases and --early-pressure")
if args.diagnostic == SCALED_SHEAR and (args.n, args.depth, args.explosion) not in cases:
p.error("scaled_shear_n256 requires one of its four Re100 cases")
elif args.n == 512:
p.error("N512 requires --diagnostic scaled_n256, scaled_shear_n256 or nested_shear_n128")
selected = os.environ.get("CUDA_VISIBLE_DEVICES", "")
if not args.dry_run and (not args.run_gpu or not selected or "," in selected or selected == "-1"):
p.error("--run-gpu and exactly one explicit CUDA_VISIBLE_DEVICES are required")
repo = args.repo.resolve()
sys.path[:0] = [str(repo / "src"), str(repo)]
source = verify_source(repo, args.expected_revision,
"shear_nested" if nested else "shear_twin" if twin else args.flow,
probes=args.probe_trace)
runtime = runtime_source(repo)
if args.dry_run:
print(json.dumps(dict(source=source, runtime_source=runtime, dry_run=True,
**({"diagnostic": args.diagnostic} if args.diagnostic else {}))))
return 0
from CelerisLab.cuda.context import CudaContext
from CelerisLab.lbm.blocks import BlockLayout2D
from CelerisLab.lbm.block_stepper import PeriodicBlockStepper
from CelerisLab.lbm.refinement_stepper import FixedPatchStepper
from CelerisLab.lbm.refinement import ACTIVE
from CelerisLab.lbm.hierarchy import build_hierarchy, leaf_partition
cfg = config(args.n, args.re)
if args.depth == 1:
refinements = []
elif nested or twin:
refinements = [list(level) for level in preset.REFINEMENTS]
else:
refinements = rectangles(args.n, args.depth)
h = build_hierarchy(cfg, refinements)
np.testing.assert_array_equal(leaf_partition(h), np.ones((args.n, args.n)))
masks = [k == ACTIVE for k in h.kinds]
main_steps, early_steps = sample_steps(args.n, args.early_pressure)
report = dict(
schema=1,
source=source,
numerical_revision=NUMERICAL_REVISION,
reference_harness=REFERENCE_HARNESS,
actual_build_sidecars=[],
runtime_identity=None,
runtime_source=runtime,
historical_baseline_revision="9805383f9c50d867e8555471baf5dbda8333a652",
explosion=args.explosion,
n=args.n,
re_L=args.re,
depth=args.depth,
refinements=refinements,
U=U,
mach=U * np.sqrt(3),
viscosity=cfg.viscosity,
tau_by_level=[0.5 + 3 * c.viscosity for c in h.configs],
initialization=initialization,
numerics=dict(lattice_model=cfg.lattice_model, collision=cfg.collision,
store_precision=cfg.store_precision, ddf_shifting=cfg.ddf_shifting,
streaming=cfg.streaming, les_enabled=cfg.les_enabled,
boundary="periodic", block_shape=[8, 8],
sample_phase="postcollision G at root synchronization"),
cuda_visible_devices=selected,
device_id=0,
limits=limits,
workload=workload(masks, round(TIMES[-1] * args.n / U)),
rows=[],
early_pressure=dict(enabled=args.early_pressure, rows=[],
sampled_max_pressure_l2=None),
completed=False,
)
if args.flow != "taylor_green":
import shear_wave
report.update(flow=args.flow, mode=list(shear_wave.MODE),
polarization=shear_wave.E.tolist(), angle_deg=shear_wave.ANGLE_DEG,
phase=shear_wave.PHI, eps=shear_wave.eps(args.n))
if args.diagnostic:
report["diagnostic"] = args.diagnostic
args.output.parent.mkdir(parents=True, exist_ok=True)
def save():
temporary = args.output.with_suffix(args.output.suffix + ".tmp")
text = json.dumps(report, indent=2, allow_nan=False) + "\n"
if len(text.encode()) > 1024 * 1024:
raise RuntimeError("Scalar receipt exceeds 1 MiB cap")
temporary.write_text(text)
temporary.replace(args.output)
save()
started = time.monotonic()
with CudaContext(0) as ctx, build_capture(report, save):
report["runtime_identity"] = runtime_identity(ctx)
save()
if args.depth == 1:
layout = BlockLayout2D.build(args.n, args.n, 8, 8, periodic=(True, True))
run = PeriodicBlockStepper(cfg, layout, context=ctx)
else:
run = FixedPatchStepper(
cfg,
context=ctx,
coarse_boundary="periodic",
refinements=refinements,
level_blocks=[(8, 8)] * args.depth,
explosion=args.explosion,
)
with run:
run.initialize(
*[
initial(m.shape, level, args.n, cfg.viscosity)
for level, m in enumerate(masks)
]
)
initial_mass = None
probe_steps = set()
if args.probe_trace:
import shear_probes
probe_root = dict(zip(shear_probes.case_steps(args.n), shear_probes.STEPS))
probe_steps = set(probe_root)
probes = shear_probes.select(masks, args.n)
report["probe_trace"] = shear_probes.new_trace(
probes, cfg.viscosity, [args.diagnostic, args.n, args.depth, args.explosion])
for step in sorted(set(main_steps + early_steps) | probe_steps):
run.step(step - run.step_count)
if step in probe_steps:
trace = report["probe_trace"]
trace["steps"].append(probe_root[step]) # root-physical step
trace["values"].append(shear_probes.sample(
(run.download(),) if args.depth == 1 else run.download(), probes))
if step not in main_steps and step not in early_steps:
continue # probe-only step: no qualification metrics
row = sample(run, masks, step, args.n, cfg.viscosity, initial_mass,
metrics, args.depth)
row["step"] = step
if initial_mass is None:
initial_mass = row["mass"]
if step in main_steps:
report["rows"].append(row)
if args.final_snapshot and step == main_steps[-1]:
# Optional macro-only snapshot; scalar receipt stays authoritative.
report["final_snapshot"] = shear_nested.write_snapshot(
args.output.with_name(args.output.stem + ".final_macro.npz"),
run.download(), masks,
shear_nested.snapshot_meta(step, cfg.viscosity, args.explosion,
source.get("revision")))
if step in early_steps:
trace = report["early_pressure"]
trace["rows"].append({key: row[key] for key in ("step", "tstar", "pressure_l2")})
trace["sampled_max_pressure_l2"] = max(r["pressure_l2"] for r in trace["rows"])
save()
print(
json.dumps(
dict(
event="PROGRESS" if step in main_steps else "EARLY_PRESSURE",
n=args.n,
re_L=args.re,
depth=args.depth,
**(row if step in main_steps else report["early_pressure"]["rows"][-1]),
)
),
flush=True,
)
if step == 0:
# Exercise real kernels/halos/transfers on every level before READY.
# This is the first measured trajectory step, not discarded warmup.
run.step(1)
sample(run, masks, 1, args.n, cfg.viscosity, initial_mass,
metrics, args.depth, "READY")
report["ready_after_step"] = 1
save()
print(
json.dumps(
dict(
event="READY",
step=1,
n=args.n,
re_L=args.re,
depth=args.depth,
workload=report["workload"],
)
),
flush=True,
)
if args.probe_trace:
try:
report["probe_trace"]["bytes"] = shear_probes.validate(report["probe_trace"])
except ValueError as error: # keep the scalar receipt; drop an invalid trace
report["probe_trace"] = dict(error=str(error))
report.update(
completed=True,
seconds=time.monotonic() - started,
screening_pass=all(
row[key] <= limit for row in report["rows"] for key, limit in limits.items()
),
)
save()
print(
json.dumps(
{k: report[k] for k in ("n", "re_L", "depth", "screening_pass", "seconds")}
),
flush=True,
)
return 0 if report["screening_pass"] else 1
if __name__ == "__main__":
raise SystemExit(main())