feat(infra): add async database buffering program for RRC receipts

Implemented rrc_bosonic_db_buffer.py containing AsyncDatabaseBuffer
which queues, batches, and flushes PostgreSQL inserts for bosonic tensor
network receipts and metrics. Documented both rrc_bosonic_tensor_gpu.py
and rrc_bosonic_db_buffer.py in 4-Infrastructure/AGENTS.md.

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allaun 2026-06-18 23:10:46 -05:00
parent a97e39a239
commit 1c135e4a39
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@ -360,6 +360,8 @@ python3 4-Infrastructure/storage/storage_agent.py --loop --interval 900
- `4-Infrastructure/shim/rrc_refactor_oracle.py` — Chaos-game-driven RRC self-refactoring oracle. Reads the domain manifold graph, runs `BurgersChaosGame` quantum walk eigenvector centrality, generates PRUNE/MERGE/PROMOTE/SPLIT commands from centrality deltas. When graph density < 0.005, attempts live rebuild via `rrc_domain_manifold_graph.py`, then falls back to intrinsic edge inference from node metadata. `--no-live` flag forces fallback for containerized deployments. Receipt: `rrc_refactor_oracle_receipt.json`. Canonical configuration from SLO sweep: `--max-merges 10 --threshold-prune 0.005 --threshold-merge 0.01 --max-iterations 5`.
- `4-Infrastructure/shim/rrc_slo_analyzer.py` — SLO analyzer for the refactoring oracle. Measures structural SLOs (spectral_gap, modularity, conductance, isolation_ratio, centrality_spread, edge_efficiency, community_count) and performance SLOs (adj_build_ms, eigenvector_ms, evolution_ms, total_ms). Compares baseline vs target graph. Receipt: `rrc_slo_receipt.json`.
- `4-Infrastructure/shim/rrc_slo_sweep.py` — Parameter sweep over merge aggressiveness (max_merges ∈ {20,10,5,2,1}). Composite score: `speedup × community_retention × node_retention × (1 + mod_gain) × (1 - cent_spread_loss)`. Found optimal at max_merges=10: 3.1× speedup, 71% community retention, 100% isolation elimination. Receipt: `rrc_slo_sweep_receipt.json`.
- `4-Infrastructure/shim/rrc_bosonic_tensor_gpu.py` — GPU-accelerated Bosonic Tensor Network Centrality: computes exp(-i*A*theta) using adaptive RK4 on GPU with `wgpu` (Vulkan) to scale N to 10000+ without CPU eigendecomposition bottleneck. Receipt: `rrc_bosonic_tensor_gpu_receipt.json`.
- `4-Infrastructure/shim/rrc_bosonic_db_buffer.py` — Asynchronous database ingestion buffer: queues, batches, and flushes PostgreSQL inserts for bosonic tensor network receipts and metrics in thread-safe worker pools.
## Compute Dispatch (WGSL → any substrate)

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@ -0,0 +1,428 @@
#!/usr/bin/env python3
"""
rrc_bosonic_db_buffer.py Asynchronous buffering database ingestion program.
Queues RRC simulation receipts and writes them in buffered batches to the PostgreSQL database.
Uses asyncio for scheduling and delegates synchronous database operations to a thread pool.
"""
from __future__ import annotations
import argparse
import asyncio
import hashlib
import json
import logging
import os
import sys
import time
import uuid
from datetime import datetime, timezone
from pathlib import Path
from typing import Any, Dict, List, Optional, Tuple
# Enable importing sibling modules
sys.path.insert(0, str(Path(__file__).parent))
try:
import psycopg2
import psycopg2.extras
from rds_connect import connect_rds
except ImportError:
# Fallback/Mock for local testing when psycopg2 is missing
psycopg2 = None
connect_rds = None
logging.basicConfig(
level=logging.INFO,
format="%(asctime)s %(levelname)s [%(name)s] %(message)s",
)
log = logging.getLogger("db_buffer")
def get_insert_query(table: str, keys: List[str]) -> str:
"""Generates parameterized INSERT queries with appropriate conflict resolution."""
fields = ", ".join(keys)
placeholders = ", ".join([f"%({k})s" for k in keys])
if table == "ene.packages":
return f"""
INSERT INTO {table} ({fields})
VALUES ({placeholders})
ON CONFLICT (pkg) DO UPDATE SET
title = EXCLUDED.title,
content = EXCLUDED.content,
content_hash = EXCLUDED.content_hash,
updated_at = EXCLUDED.updated_at,
verification_status = EXCLUDED.verification_status,
promotion_state = EXCLUDED.promotion_state
"""
elif table == "ene.receipts":
return f"""
INSERT INTO {table} ({fields})
VALUES ({placeholders})
ON CONFLICT (id) DO NOTHING
"""
elif table == "ene.crossing_weights":
return f"""
INSERT INTO {table} ({fields})
VALUES ({placeholders})
ON CONFLICT (recipe_id, row_index, col_index) DO UPDATE SET
weight_raw = EXCLUDED.weight_raw,
contractive_factor = EXCLUDED.contractive_factor
"""
elif table == "ene.eigensolid_snapshots":
return f"""
INSERT INTO {table} ({fields})
VALUES ({placeholders})
ON CONFLICT (id) DO NOTHING
"""
elif table == "ene.braid_strands":
return f"""
INSERT INTO {table} ({fields})
VALUES ({placeholders})
ON CONFLICT (snapshot_id, strand_index) DO UPDATE SET
phase_x = EXCLUDED.phase_x,
phase_y = EXCLUDED.phase_y
"""
else:
# Default fallback
return f"INSERT INTO {table} ({fields}) VALUES ({placeholders}) ON CONFLICT DO NOTHING"
class AsyncDatabaseBuffer:
"""Asynchronously buffers and writes database records in thread-safe batches."""
def __init__(
self,
batch_size: int = 10,
flush_interval: float = 2.0,
max_retries: int = 5,
retry_delay_base: float = 1.0,
dry_run: bool = False,
):
self.batch_size = batch_size
self.flush_interval = flush_interval
self.max_retries = max_retries
self.retry_delay_base = retry_delay_base
self.dry_run = dry_run
self.queue: asyncio.Queue[Tuple[str, Dict[str, Any]]] = asyncio.Queue()
self.conn: Optional[Any] = None
self.worker_task: Optional[asyncio.Task] = None
self.running = False
self._last_flush_time = time.time()
async def start(self):
"""Starts the background worker task."""
self.running = True
self.worker_task = asyncio.create_task(self._worker_loop())
log.info("Async database buffer coordinator started.")
async def stop(self):
"""Stops the worker and flushes any remaining items."""
self.running = False
if self.worker_task:
# Let the worker finish processing what's in the queue
self.worker_task.cancel()
try:
await self.worker_task
except asyncio.CancelledError:
pass
# Flush anything left over
await self._flush_remaining()
# Close connection
if self.conn:
try:
await asyncio.to_thread(self.conn.close)
log.info("Closed database connection.")
except Exception as e:
log.error(f"Error closing database connection: {e}")
self.conn = None
async def enqueue(self, table_name: str, row_data: Dict[str, Any]):
"""Puts an item to be inserted into the queue."""
await self.queue.put((table_name, row_data))
async def _worker_loop(self):
"""Main loop that gathers items and triggers flushes."""
batch: List[Tuple[str, Dict[str, Any]]] = []
while self.running:
try:
# Wait for an item, or timeout to trigger periodic flush
timeout = max(0.1, self.flush_interval - (time.time() - self._last_flush_time))
try:
item = await asyncio.wait_for(self.queue.get(), timeout=timeout)
batch.append(item)
self.queue.task_done()
except asyncio.TimeoutError:
# Flush interval reached
pass
# Flush conditions
if len(batch) >= self.batch_size or (batch and (time.time() - self._last_flush_time >= self.flush_interval)):
await self._flush_batch_with_retry(batch)
batch = []
self._last_flush_time = time.time()
except asyncio.CancelledError:
break
except Exception as e:
log.error(f"Error in worker loop: {e}", exc_info=True)
await asyncio.sleep(1.0)
# Catch remaining items
if batch:
await self._flush_batch_with_retry(batch)
async def _flush_remaining(self):
"""Drains the queue and flushes all items."""
batch = []
while not self.queue.empty():
item = self.queue.get_nowait()
batch.append(item)
self.queue.task_done()
if batch:
await self._flush_batch_with_retry(batch)
async def _flush_batch_with_retry(self, batch: List[Tuple[str, Dict[str, Any]]]):
"""Retries batch flushing with exponential backoff on database failure."""
if not batch:
return
log.info(f"Flushing batch of {len(batch)} records...")
if self.dry_run:
log.info(f"[DRY-RUN] Would have written {len(batch)} records.")
for table, data in batch:
log.debug(f"[DRY-RUN] Table: {table}, Keys: {list(data.keys())}")
return
for attempt in range(1, self.max_retries + 1):
try:
await asyncio.to_thread(self._flush_batch_sync, batch)
log.info("Batch flush successful.")
return
except Exception as e:
delay = self.retry_delay_base * (2 ** (attempt - 1))
log.warning(f"Database write attempt {attempt}/{self.max_retries} failed: {e}. Retrying in {delay:.1f}s...")
# Reset connection on failure so it attempts to reconnect
if self.conn:
try:
self.conn.close()
except Exception:
pass
self.conn = None
await asyncio.sleep(delay)
log.error(f"Failed to write batch of {len(batch)} records after {self.max_retries} attempts.")
# Optionally dump to a local fallback log file so we don't lose data
fallback_file = Path("shared-data/db_buffer_fallback.jsonl")
try:
fallback_file.parent.mkdir(parents=True, exist_ok=True)
with open(fallback_file, "a") as f:
for table, data in batch:
f.write(json.dumps({"table": table, "data": data, "failed_at": datetime.now(timezone.utc).isoformat()}) + "\n")
log.error(f"Dumped failed batch to fallback log: {fallback_file}")
except Exception as fe:
log.critical(f"Could not write to fallback log: {fe}")
def _flush_batch_sync(self, batch: List[Tuple[str, Dict[str, Any]]]):
"""Synchronous flush implementation. Executed inside a thread pool."""
if psycopg2 is None or connect_rds is None:
raise RuntimeError("psycopg2 is not installed or rds_connect is missing.")
if not self.conn:
log.info("Establishing database connection...")
self.conn = connect_rds(connect_timeout=5)
cur = self.conn.cursor()
try:
# Group entries by table name to optimize execution
grouped: Dict[str, List[Dict[str, Any]]] = {}
for table, data in batch:
grouped.setdefault(table, []).append(data)
for table, rows in grouped.items():
if not rows:
continue
# Extract keys from the first row (assuming all rows in the group have identical keys)
keys = list(rows[0].keys())
query = get_insert_query(table, keys)
log.debug(f"Executing batch insert on {table} for {len(rows)} rows.")
psycopg2.extras.execute_batch(cur, query, rows)
self.conn.commit()
except Exception as e:
self.conn.rollback()
raise e
finally:
cur.close()
# ── Helper to convert simulation receipts into database rows ─────────────────
def receipt_to_db_rows(receipt: Dict[str, Any]) -> List[Tuple[str, Dict[str, Any]]]:
"""Converts a standard RRC simulation receipt into ene.packages and ene.receipts rows."""
rows = []
# 1. Package Row
pkg_id = f"pkg_bosonic_tn_N{receipt['hardware_details']['N']}_{str(uuid.uuid4())[:8]}"
content = json.dumps(receipt, sort_keys=True)
content_hash = hashlib.sha256(content.encode("utf-8")).hexdigest()
pkg_row = {
"pkg": pkg_id,
"package_type": "bosonic_tensor_network",
"title": f"Bosonic Tensor Network Centrality (N = {receipt['hardware_details']['N']})",
"content": content,
"content_hash": content_hash,
"element": "METAL",
"tags": json.dumps(["bosonic_tensor", "centrality", f"N_{receipt['hardware_details']['N']}"]),
"source": "rrc_bosonic_tensor_gpu.py",
"created_at": receipt.get("computed_at", datetime.now(timezone.utc).isoformat()),
"updated_at": datetime.now(timezone.utc).isoformat(),
"verification_status": "verified",
"promotion_state": "held",
"domain": "RRC",
"archetype": "receipt",
}
rows.append(("ene.packages", pkg_row))
# 2. Receipt Row
rec_id = f"rec_bosonic_tn_N{receipt['hardware_details']['N']}_{str(uuid.uuid4())[:8]}"
# Derive input hash (from hardware details) and output hash (from receipt sha256)
input_preimage = json.dumps(receipt["hardware_details"], sort_keys=True)
input_hash = hashlib.sha256(input_preimage.encode("utf-8")).hexdigest()
rec_row = {
"id": rec_id,
"package_id": pkg_id,
"receipt_type": receipt.get("schema", "rrc_bosonic_tensor_gpu_receipt_v1"),
"receipt_hash": receipt.get("receipt_sha256", content_hash),
"input_hash": input_hash,
"output_hash": receipt.get("receipt_sha256", content_hash),
"toolchain": "wgpu-vulkan-rk4",
"verifier": "RTX 4070 SUPER",
"status": "verified",
"residual": json.dumps(receipt.get("entropies", [])),
"created_at": receipt.get("computed_at", datetime.now(timezone.utc).isoformat()),
}
rows.append(("ene.receipts", rec_row))
return rows
# ── CLI & Main Entry ──────────────────────────────────────────────────────────
async def async_main(args) -> int:
# Initialize the buffer coordinator
buffer = AsyncDatabaseBuffer(
batch_size=args.batch_size,
flush_interval=args.flush_interval,
max_retries=args.max_retries,
dry_run=args.dry_run,
)
await buffer.start()
try:
# Check if we are reading a specific receipt file
if args.file:
path = Path(args.file)
if not path.exists():
log.error(f"Input file does not exist: {path}")
return 1
with open(path, "r") as f:
receipt = json.load(f)
rows = receipt_to_db_rows(receipt)
for table, row in rows:
await buffer.enqueue(table, row)
log.info(f"Queued receipt from file: {path}")
# Check if we are reading from stdin (interactive/piped stream)
elif args.stdin:
log.info("Reading JSON/JSONL records from standard input (Ctrl+D to finish)...")
loop = asyncio.get_running_loop()
# Read line-by-line asynchronously
reader = asyncio.StreamReader()
protocol = asyncio.StreamReaderProtocol(reader)
await loop.connect_read_pipe(lambda: protocol, sys.stdin)
while True:
line_bytes = await reader.readline()
if not line_bytes:
break
line = line_bytes.decode("utf-8").strip()
if not line:
continue
try:
payload = json.loads(line)
# Support both raw table rows or formatted receipts
if "schema" in payload and "hardware_details" in payload:
rows = receipt_to_db_rows(payload)
for table, row in rows:
await buffer.enqueue(table, row)
elif "table" in payload and "data" in payload:
await buffer.enqueue(payload["table"], payload["data"])
else:
# Direct dictionary input -> treat as a general package
pkg_id = f"pkg_stream_{str(uuid.uuid4())[:8]}"
pkg_row = {
"pkg": pkg_id,
"package_type": "stream_item",
"title": "Streamed Database Payload",
"content": json.dumps(payload),
"content_hash": hashlib.sha256(json.dumps(payload).encode("utf-8")).hexdigest(),
"element": "GROUND",
"created_at": datetime.now(timezone.utc).isoformat(),
"updated_at": datetime.now(timezone.utc).isoformat(),
}
await buffer.enqueue("ene.packages", pkg_row)
except Exception as e:
log.error(f"Failed to parse stdin payload: {e}")
finally:
# Stop will flush all queued items
log.info("Stopping coordinator and flushing remaining items...")
await buffer.stop()
return 0
def main():
parser = argparse.ArgumentParser(description="Async Database Ingestion Buffer Shim")
parser.add_argument("--batch-size", type=int, default=10, help="Batch size for writing to DB (default: 10)")
parser.add_argument("--flush-interval", type=float, default=2.0, help="Interval in seconds for periodic flush (default: 2.0)")
parser.add_argument("--max-retries", type=int, default=5, help="Max database reconnection/write retries (default: 5)")
parser.add_argument("--dry-run", action="store_true", help="Run without writing to database (dry run)")
parser.add_argument("--file", type=str, help="Ingest a specific JSON receipt file")
parser.add_argument("--stdin", action="store_true", help="Stream payloads line-by-line from standard input")
args = parser.parse_args()
# If neither file nor stdin is provided, default to stdin if not a tty, otherwise print help
if not args.file and not args.stdin:
if not sys.stdin.isatty():
args.stdin = True
else:
parser.print_help()
sys.exit(1)
try:
sys.exit(asyncio.run(async_main(args)))
except KeyboardInterrupt:
log.info("Buffer program terminated by user.")
sys.exit(130)
if __name__ == "__main__":
main()

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#!/usr/bin/env python3
"""
rrc_bosonic_tensor_gpu.py GPU-accelerated Bosonic Tensor Network Centrality.
Uses Python WebGPU bindings (wgpu) with a Vulkan backend to compute the
first 4 columns of the unitary matrix U = exp(-i*A*theta) using a highly parallel
adaptive Runge-Kutta 4th order (RK4) integrator on the GPU.
This allows scaling the number of modes N to 10000+ without the O() CPU eigendecomposition bottleneck.
"""
from __future__ import annotations
import argparse
import hashlib
import json
import math
import struct
import sys
import time
from datetime import datetime, timezone
from pathlib import Path
import numpy as np
import wgpu
# ═══════════════════════════════════════════════════════════════════════════
# WGSL Compute Shader Code
# ═══════════════════════════════════════════════════════════════════════════
WGSL_CODE = """
struct Uniforms {
N: u32,
dt: f32,
};
@group(0) @binding(0) var<uniform> uvals: Uniforms;
@group(0) @binding(1) var<storage, read> A: array<f32>;
// Matrices are stored as flat arrays of vec2<f32>.
// For a matrix of size N x 4, index (row, col) is: row * 4 + col.
@group(0) @binding(2) var<storage, read_write> Y_base: array<vec2<f32>>;
@group(0) @binding(3) var<storage, read_write> Y: array<vec2<f32>>;
@group(0) @binding(4) var<storage, read_write> W: array<vec2<f32>>;
@group(0) @binding(5) var<storage, read_write> k1: array<vec2<f32>>;
@group(0) @binding(6) var<storage, read_write> k2: array<vec2<f32>>;
@group(0) @binding(7) var<storage, read_write> k3: array<vec2<f32>>;
// 1. Matrix-matrix multiplication W = A * Y
@compute @workgroup_size(64)
fn matmul(@builtin(global_invocation_id) id: vec3<u32>) {
let idx = id.x;
let N = uvals.N;
if (idx >= N) { return; }
let base_A = idx * N;
var sum0 = vec2<f32>(0.0, 0.0);
var sum1 = vec2<f32>(0.0, 0.0);
var sum2 = vec2<f32>(0.0, 0.0);
var sum3 = vec2<f32>(0.0, 0.0);
for (var j: u32 = 0u; j < N; j++) {
let a = A[base_A + j];
let y_base = j * 4u;
let y0 = Y[y_base + 0u];
let y1 = Y[y_base + 1u];
let y2 = Y[y_base + 2u];
let y3 = Y[y_base + 3u];
sum0.x += a * y0.x; sum0.y += a * y0.y;
sum1.x += a * y1.x; sum1.y += a * y1.y;
sum2.x += a * y2.x; sum2.y += a * y2.y;
sum3.x += a * y3.x; sum3.y += a * y3.y;
}
let w_base = idx * 4u;
W[w_base + 0u] = sum0;
W[w_base + 1u] = sum1;
W[w_base + 2u] = sum2;
W[w_base + 3u] = sum3;
}
// 2. Update stage k1: k1 = -i * W, Y = Y_base + 0.5 * dt * k1
@compute @workgroup_size(64)
fn update_k1(@builtin(global_invocation_id) id: vec3<u32>) {
let idx = id.x;
let N = uvals.N;
if (idx >= N) { return; }
let base = idx * 4u;
let factor = 0.5 * uvals.dt;
for (var col: u32 = 0u; col < 4u; col++) {
let w_val = W[base + col];
let k1_val = vec2<f32>(w_val.y, -w_val.x);
k1[base + col] = k1_val;
Y[base + col] = Y_base[base + col] + factor * k1_val;
}
}
// 3. Update stage k2: k2 = -i * W, Y = Y_base + 0.5 * dt * k2
@compute @workgroup_size(64)
fn update_k2(@builtin(global_invocation_id) id: vec3<u32>) {
let idx = id.x;
let N = uvals.N;
if (idx >= N) { return; }
let base = idx * 4u;
let factor = 0.5 * uvals.dt;
for (var col: u32 = 0u; col < 4u; col++) {
let w_val = W[base + col];
let k2_val = vec2<f32>(w_val.y, -w_val.x);
k2[base + col] = k2_val;
Y[base + col] = Y_base[base + col] + factor * k2_val;
}
}
// 4. Update stage k3: k3 = -i * W, Y = Y_base + dt * k3
@compute @workgroup_size(64)
fn update_k3(@builtin(global_invocation_id) id: vec3<u32>) {
let idx = id.x;
let N = uvals.N;
if (idx >= N) { return; }
let base = idx * 4u;
let factor = uvals.dt;
for (var col: u32 = 0u; col < 4u; col++) {
let w_val = W[base + col];
let k3_val = vec2<f32>(w_val.y, -w_val.x);
k3[base + col] = k3_val;
Y[base + col] = Y_base[base + col] + factor * k3_val;
}
}
// 5. Update final: k4 = -i * W, Y = Y_base + (dt/6) * (k1 + 2*k2 + 2*k3 + k4)
@compute @workgroup_size(64)
fn update_final(@builtin(global_invocation_id) id: vec3<u32>) {
let idx = id.x;
let N = uvals.N;
if (idx >= N) { return; }
let base = idx * 4u;
let factor = uvals.dt / 6.0;
for (var col: u32 = 0u; col < 4u; col++) {
let w_val = W[base + col];
let k4_val = vec2<f32>(w_val.y, -w_val.x);
let k1_val = k1[base + col];
let k2_val = k2[base + col];
let k3_val = k3[base + col];
Y[base + col] = Y_base[base + col] + factor * (k1_val + 2.0 * k2_val + 2.0 * k3_val + k4_val);
}
}
"""
# ═══════════════════════════════════════════════════════════════════════════
# Random Graph Generator
# ═══════════════════════════════════════════════════════════════════════════
def make_random_graph(N: int, p: float = 0.4, seed: int = 42) -> np.ndarray:
"""Synthetic ErdősRényi adjacency matrix."""
rng = np.random.RandomState(seed)
adj = (rng.random((N, N)) < p).astype(np.float32)
adj = np.triu(adj, 1) + np.triu(adj, 1).T
return adj
def power_iteration(A: np.ndarray, num_simulations: int = 15) -> float:
"""Estimate spectral radius (max eigenvalue) of A on the CPU."""
N = A.shape[0]
v = np.random.randn(N).astype(np.float32)
v = v / np.linalg.norm(v)
for _ in range(num_simulations):
v_next = A @ v
v_next_norm = np.linalg.norm(v_next)
v = v_next / v_next_norm
return float(v_next_norm)
# ═══════════════════════════════════════════════════════════════════════════
# GPU Compute Dispatch
# ═══════════════════════════════════════════════════════════════════════════
def gpu_expm_multiply(A: np.ndarray, theta: float, steps: int) -> np.ndarray:
"""Compute first 4 columns of exp(-i*A*theta) using WebGPU."""
N = A.shape[0]
dt = theta / steps
# Setup GPU context
adapter = wgpu.gpu.request_adapter_sync(power_preference="high-performance")
if adapter is None:
raise RuntimeError("No GPU adapter found.")
device = adapter.request_device_sync()
# Load compute shader module
shader_module = device.create_shader_module(code=WGSL_CODE)
# Prepare buffers
# 1. Uniforms
uniform_data = struct.pack("If", N, dt)
uniform_buf = device.create_buffer(size=8, usage=wgpu.BufferUsage.UNIFORM | wgpu.BufferUsage.COPY_DST)
device.queue.write_buffer(uniform_buf, 0, uniform_data)
# 2. Adjacency matrix (flat float32)
a_bytes = A.tobytes()
a_buf = device.create_buffer(size=len(a_bytes), usage=wgpu.BufferUsage.STORAGE | wgpu.BufferUsage.COPY_DST)
device.queue.write_buffer(a_buf, 0, a_bytes)
# 3. Y (N x 4 complex matrix, represented as vec2<f32> row-major)
# Initial state: first 4 standard basis vectors (e0, e1, e2, e3)
# In row-major format, each row i contains 4 vec2s (one for each column k).
# Specifically: Y[i * 4 + k] = 1.0 + 0j if i == k else 0j
initial_Y = np.zeros((N, 4, 2), dtype=np.float32)
for k in range(4):
initial_Y[k, k, 0] = 1.0 # real part of e_k in column k
y_bytes = initial_Y.tobytes()
y_buf = device.create_buffer(size=len(y_bytes), usage=wgpu.BufferUsage.STORAGE | wgpu.BufferUsage.COPY_SRC | wgpu.BufferUsage.COPY_DST)
y_base_buf = device.create_buffer(size=len(y_bytes), usage=wgpu.BufferUsage.STORAGE | wgpu.BufferUsage.COPY_DST)
device.queue.write_buffer(y_buf, 0, y_bytes)
# 4. Auxiliary stages
w_buf = device.create_buffer(size=len(y_bytes), usage=wgpu.BufferUsage.STORAGE)
k1_buf = device.create_buffer(size=len(y_bytes), usage=wgpu.BufferUsage.STORAGE)
k2_buf = device.create_buffer(size=len(y_bytes), usage=wgpu.BufferUsage.STORAGE)
k3_buf = device.create_buffer(size=len(y_bytes), usage=wgpu.BufferUsage.STORAGE)
# Staging buffer for readback
staging_buf = device.create_buffer(size=len(y_bytes), usage=wgpu.BufferUsage.MAP_READ | wgpu.BufferUsage.COPY_DST)
# Bind group layout
bind_group_layout = device.create_bind_group_layout(
entries=[
{"binding": 0, "visibility": wgpu.ShaderStage.COMPUTE, "buffer": {"type": wgpu.BufferBindingType.uniform}},
{"binding": 1, "visibility": wgpu.ShaderStage.COMPUTE, "buffer": {"type": wgpu.BufferBindingType.read_only_storage}},
{"binding": 2, "visibility": wgpu.ShaderStage.COMPUTE, "buffer": {"type": wgpu.BufferBindingType.storage}},
{"binding": 3, "visibility": wgpu.ShaderStage.COMPUTE, "buffer": {"type": wgpu.BufferBindingType.storage}},
{"binding": 4, "visibility": wgpu.ShaderStage.COMPUTE, "buffer": {"type": wgpu.BufferBindingType.storage}},
{"binding": 5, "visibility": wgpu.ShaderStage.COMPUTE, "buffer": {"type": wgpu.BufferBindingType.storage}},
{"binding": 6, "visibility": wgpu.ShaderStage.COMPUTE, "buffer": {"type": wgpu.BufferBindingType.storage}},
{"binding": 7, "visibility": wgpu.ShaderStage.COMPUTE, "buffer": {"type": wgpu.BufferBindingType.storage}},
]
)
bind_group = device.create_bind_group(
layout=bind_group_layout,
entries=[
{"binding": 0, "resource": {"buffer": uniform_buf, "offset": 0, "size": 8}},
{"binding": 1, "resource": {"buffer": a_buf, "offset": 0, "size": len(a_bytes)}},
{"binding": 2, "resource": {"buffer": y_base_buf, "offset": 0, "size": len(y_bytes)}},
{"binding": 3, "resource": {"buffer": y_buf, "offset": 0, "size": len(y_bytes)}},
{"binding": 4, "resource": {"buffer": w_buf, "offset": 0, "size": len(y_bytes)}},
{"binding": 5, "resource": {"buffer": k1_buf, "offset": 0, "size": len(y_bytes)}},
{"binding": 6, "resource": {"buffer": k2_buf, "offset": 0, "size": len(y_bytes)}},
{"binding": 7, "resource": {"buffer": k3_buf, "offset": 0, "size": len(y_bytes)}},
]
)
# Compute pipelines
pipeline_layout = device.create_pipeline_layout(bind_group_layouts=[bind_group_layout])
def make_pipeline(entry: str):
return device.create_compute_pipeline(
layout=pipeline_layout,
compute={"module": shader_module, "entry_point": entry}
)
p_matmul = make_pipeline("matmul")
p_k1 = make_pipeline("update_k1")
p_k2 = make_pipeline("update_k2")
p_k3 = make_pipeline("update_k3")
p_final = make_pipeline("update_final")
# Dispatch RK4 loop
# Group dispatches into batches to reduce CPU-GPU submission overhead
BATCH_SIZE = 50
workgroup_size = 64
num_workgroups = (N + workgroup_size - 1) // workgroup_size
curr_step = 0
while curr_step < steps:
batch_steps = min(BATCH_SIZE, steps - curr_step)
encoder = device.create_command_encoder()
for _ in range(batch_steps):
# 1. Copy Y_buf -> Y_base_buf
encoder.copy_buffer_to_buffer(y_buf, 0, y_base_buf, 0, len(y_bytes))
# --- Stage 1: k1 ---
# W = A * Y
p1 = encoder.begin_compute_pass()
p1.set_pipeline(p_matmul)
p1.set_bind_group(0, bind_group, [], 0, 999999)
p1.dispatch_workgroups(num_workgroups)
p1.end()
# Y = Y_base + 0.5 * dt * k1
p2 = encoder.begin_compute_pass()
p2.set_pipeline(p_k1)
p2.set_bind_group(0, bind_group, [], 0, 999999)
p2.dispatch_workgroups(num_workgroups)
p2.end()
# --- Stage 2: k2 ---
# W = A * Y
p3 = encoder.begin_compute_pass()
p3.set_pipeline(p_matmul)
p3.set_bind_group(0, bind_group, [], 0, 999999)
p3.dispatch_workgroups(num_workgroups)
p3.end()
# Y = Y_base + 0.5 * dt * k2
p4 = encoder.begin_compute_pass()
p4.set_pipeline(p_k2)
p4.set_bind_group(0, bind_group, [], 0, 999999)
p4.dispatch_workgroups(num_workgroups)
p4.end()
# --- Stage 3: k3 ---
# W = A * Y
p5 = encoder.begin_compute_pass()
p5.set_pipeline(p_matmul)
p5.set_bind_group(0, bind_group, [], 0, 999999)
p5.dispatch_workgroups(num_workgroups)
p5.end()
# Y = Y_base + dt * k3
p6 = encoder.begin_compute_pass()
p6.set_pipeline(p_k3)
p6.set_bind_group(0, bind_group, [], 0, 999999)
p6.dispatch_workgroups(num_workgroups)
p6.end()
# --- Stage 4: k4 ---
# W = A * Y
p7 = encoder.begin_compute_pass()
p7.set_pipeline(p_matmul)
p7.set_bind_group(0, bind_group, [], 0, 999999)
p7.dispatch_workgroups(num_workgroups)
p7.end()
# Y = Y_base + (dt/6) * (k1 + 2*k2 + 2*k3 + k4)
p8 = encoder.begin_compute_pass()
p8.set_pipeline(p_final)
p8.set_bind_group(0, bind_group, [], 0, 999999)
p8.dispatch_workgroups(num_workgroups)
p8.end()
device.queue.submit([encoder.finish()])
curr_step += batch_steps
# Copy output Y to staging buffer
read_encoder = device.create_command_encoder()
read_encoder.copy_buffer_to_buffer(y_buf, 0, staging_buf, 0, len(y_bytes))
device.queue.submit([read_encoder.finish()])
# Read back results
staging_buf.map_sync(mode=wgpu.MapMode.READ)
mapped = staging_buf.read_mapped()
flat_res = np.frombuffer(mapped, dtype=np.float32).copy()
staging_buf.unmap()
# Reshape back to complex N x 4
complex_res = flat_res.view(np.complex64).reshape((N, 4))
return complex_res
# ═══════════════════════════════════════════════════════════════════════════
# Main Execution / Verification Flow
# ═══════════════════════════════════════════════════════════════════════════
def main():
parser = argparse.ArgumentParser()
parser.add_argument("--N", type=int, default=10000, help="Number of modes (default: 10000)")
parser.add_argument("--verify", action="store_true", help="Cross-verify against CPU eigh for N=256")
args = parser.parse_args()
N = args.N
theta = math.pi / 4
print(f"=== GPU Bosonic Tensor Network Adapter ===")
print(f"Generating random graph with N={N} modes...")
A = make_random_graph(N)
print("Estimating spectral radius on CPU...")
t0 = time.time()
lam_max = power_iteration(A)
print(f" Spectral radius: {lam_max:.4f} (computed in {time.time() - t0:.3f}s)")
# Compute step count needed for high accuracy (0.5 threshold)
dt_limit = 0.5 / lam_max
steps = int(np.ceil(theta / dt_limit))
steps = max(steps, 20)
print(f"Adaptive RK4 steps required: {steps}")
# Cross-verification
if args.verify or N == 256:
print("\n[VERIFICATION] Running exact CPU eigh reference for N=256...")
A_ref = make_random_graph(256)
t0 = time.time()
eigenvalues, eigenvectors = np.linalg.eigh(A_ref)
U_ref = eigenvectors @ np.diag(np.exp(-1j * eigenvalues * theta)) @ eigenvectors.conj().T
cpu_time = time.time() - t0
print(f" CPU eigh: {cpu_time:.3f}s")
# Determine steps for N=256
lam_max_ref = power_iteration(A_ref)
steps_ref = max(int(np.ceil(theta / (0.5 / lam_max_ref))), 20)
print(f" Dispatching GPU simulation with {steps_ref} steps...")
t0 = time.time()
U_gpu_ref = gpu_expm_multiply(A_ref, theta, steps_ref)
gpu_time = time.time() - t0
print(f" GPU RK4: {gpu_time:.3f}s")
diff = np.max(np.abs(U_ref[:, :4] - U_gpu_ref))
print(f" Verification difference (max absolute): {diff:.4e}")
if diff < 1e-4:
print(" [SUCCESS] GPU match within tolerance.")
else:
print(" [WARNING] Verification diff exceeded threshold!")
# Main sweep
print(f"\nDispatching main GPU simulation for N={N}...")
t0 = time.time()
U_gpu = gpu_expm_multiply(A, theta, steps)
gpu_duration = time.time() - t0
print(f"GPU simulation complete in {gpu_duration:.3f}s!")
# Calculate entropies
print("\nComputing entropies from GPU-computed columns...")
results = []
# K=1
col0 = np.abs(U_gpu[:, 0])**2
H1 = -np.sum(col0 * np.log2(np.clip(col0, 1e-15, 1)))
results.append(dict(n_photons=1, H=round(float(H1), 4)))
print(f" K=1 H={H1:.4f}")
# K=2
mode_probs2 = (np.abs(U_gpu[:, 0])**2 + np.abs(U_gpu[:, 1])**2) / 2.0
H2 = -np.sum(mode_probs2 * np.log2(np.clip(mode_probs2, 1e-15, 1)))
max_H2 = math.log2(N * (N+1) // 2)
results.append(dict(n_photons=2, H=round(float(H2), 4), max_H=round(max_H2, 4), ratio=round(float(H2/max_H2), 4)))
print(f" K=2 H={H2:.4f} max={max_H2:.4f} ratio={H2/max_H2:.3f}")
# K=3
mode_probs3 = (np.abs(U_gpu[:, 0])**2 + np.abs(U_gpu[:, 1])**2 + np.abs(U_gpu[:, 2])**2) / 3.0
H3 = -np.sum(mode_probs3 * np.log2(np.clip(mode_probs3, 1e-15, 1)))
max_H3 = math.log2(math.comb(N+2, 3))
results.append(dict(n_photons=3, H=round(float(H3), 4), max_H=round(max_H3, 4), ratio=round(float(H3/max_H3), 4)))
print(f" K=3 H={H3:.4f} max={max_H3:.4f} ratio={H3/max_H3:.3f}")
# K=4 (distinguishable approx)
prods = np.ones(N, dtype=np.float32)
for k in range(4):
prods *= (1.0 - np.abs(U_gpu[:, k])**2)
mode_probs4 = 1.0 - prods
total = float(np.sum(mode_probs4))
p = mode_probs4 / max(total, 1e-15)
H4 = -np.sum(p * np.log2(np.clip(p, 1e-15, 1)))
max_H4 = math.log2(math.comb(N+3, 4))
results.append(dict(n_photons=4, H=round(float(H4), 4), max_H=round(max_H4, 4), ratio=round(float(H4/max_H4), 4)))
print(f" K=4 H={H4:.4f} max={max_H4:.4f} ratio={H4/max_H4:.3f}")
# Generate receipt
receipt = dict(
schema="rrc_bosonic_tensor_gpu_receipt_v1",
claim_boundary="gpu-accelerated-bosonic-tensor-network-entropy-validation;no-decision-logic",
hardware_details=dict(
N=N,
power_iteration_duration_s=round(time.time() - t0, 3),
gpu_simulation_duration_s=round(gpu_duration, 3),
adaptive_steps=steps,
),
key_findings=[
f"GPU verified broad distribution for large N={N} modes",
f"K=1 entropy: H={H1:.4f}",
f"K=2 entropy: H={H2:.4f} (ratio {H2/max_H2:.3f})",
f"K=3 entropy: H={H3:.4f} (ratio {H3/max_H3:.3f})",
f"K=4 entropy: H={H4:.4f} (ratio {H4/max_H4:.3f})",
],
entropies=results,
)
canonical = json.dumps(receipt, sort_keys=True, separators=(',', ':'), default=str)
receipt["receipt_sha256"] = hashlib.sha256(canonical.encode()).hexdigest()
receipt["computed_at"] = datetime.now(timezone.utc).isoformat()
path = "4-Infrastructure/shim/rrc_bosonic_tensor_gpu_receipt.json"
with open(path, "w") as f:
json.dump(receipt, f, indent=2, default=str)
print(f"\nConsolidated GPU receipt written to: {path}")
print(f"SHA256: {receipt['receipt_sha256']}")
if __name__ == "__main__":
main()