Nomad changes

tools/benchmark-harness/scripts/pdftotext_extract.py

@@ -0,0 +1,237 @@
+"""pdftotext extraction wrapper for benchmark harness.
+
+Supports three modes:
+- sync: extract text from entire PDF (sequential)
+- batch: process multiple files (simulated batch using loop)
+- server: persistent mode reading paths from stdin
+"""
+
+from __future__ import annotations
+
+import json
+import multiprocessing as _mp
+import os
+import platform
+import resource
+import sys
+import time
+from typing import Any
+
+import pdftotext
+
+
+def _get_peak_memory_bytes() -> int:
+    """Get peak memory usage in bytes using resource module."""
+    usage = resource.getrusage(resource.RUSAGE_SELF)
+    if platform.system() == "Linux":
+        return usage.ru_maxrss * 1024
+    return usage.ru_maxrss
+
+
+def extract_sync(file_path: str) -> dict[str, Any]:
+    """Extract using synchronous single-file API."""
+    start = time.perf_counter()
+
+    with open(file_path, "rb") as f:
+        pdf = pdftotext.PDF(f)
+
+    content = "\n\n".join(pdf)
+
+    duration_ms = (time.perf_counter() - start) * 1000.0
+
+    return {
+        "content": content,
+        "metadata": {"framework": "pdftotext"},
+        "_extraction_time_ms": duration_ms,
+        "_peak_memory_bytes": _get_peak_memory_bytes(),
+    }
+
+
+def extract_batch(file_paths: list[str]) -> list[dict[str, Any]]:
+    """Extract multiple files (simulated batch - pdftotext has no native batch API)."""
+    start = time.perf_counter()
+
+    results = []
+    for file_path in file_paths:
+        try:
+            with open(file_path, "rb") as f:
+                pdf = pdftotext.PDF(f)
+
+            content = "\n\n".join(pdf)
+            results.append(
+                {
+                    "content": content,
+                    "metadata": {"framework": "pdftotext"},
+                }
+            )
+        except Exception as e:
+            results.append(
+                {
+                    "content": "",
+                    "metadata": {
+                        "framework": "pdftotext",
+                        "error": str(e),
+                    },
+                }
+            )
+
+    total_duration_ms = (time.perf_counter() - start) * 1000.0
+    per_file_duration_ms = total_duration_ms / len(file_paths) if file_paths else 0
+
+    peak_memory = _get_peak_memory_bytes()
+    for result in results:
+        result["_extraction_time_ms"] = per_file_duration_ms
+        result["_batch_total_ms"] = total_duration_ms
+        result["_peak_memory_bytes"] = peak_memory
+
+    return results
+
+
+def _worker(fn, args, conn):
+    """Run extraction in a forked child process.
+
+    Closes inherited stdin/stdout so the child cannot corrupt the
+    parent's line-based JSON protocol.
+    """
+    try:
+        sys.stdin.close()
+        sys.stdout = open(os.devnull, "w")
+    except Exception:
+        pass
+    try:
+        result = fn(*args)
+        conn.send(result)
+    except Exception as e:
+        conn.send({"error": str(e), "_extraction_time_ms": 0})
+    finally:
+        conn.close()
+
+
+def _run_with_timeout(fn, args, timeout):
+    """Execute fn(*args) in a forked child with a timeout.
+
+    On timeout the child is killed but the parent stays alive —
+    no expensive process restart is needed.
+    """
+    try:
+        ctx = _mp.get_context("fork")
+        parent_conn, child_conn = ctx.Pipe(duplex=False)
+        p = ctx.Process(target=_worker, args=(fn, args, child_conn))
+        p.start()
+        child_conn.close()
+
+        if parent_conn.poll(timeout=timeout):
+            try:
+                result = parent_conn.recv()
+            except Exception:
+                result = {"error": "worker process crashed", "_extraction_time_ms": 0}
+        else:
+            p.kill()
+            result = {
+                "error": f"extraction timed out after {timeout}s",
+                "_extraction_time_ms": timeout * 1000.0,
+            }
+
+        p.join(timeout=5)
+        if p.is_alive():
+            p.kill()
+            p.join()
+        parent_conn.close()
+        return result
+    except Exception:
+        # Fork not available — fall back to in-process extraction
+        try:
+            return fn(*args)
+        except Exception as e:
+            return {"error": str(e), "_extraction_time_ms": 0}
+
+
+def _parse_path(line: str) -> str:
+    """Parse a request line: JSON object with path field, or plain file path."""
+    stripped = line.strip()
+    if stripped.startswith("{"):
+        try:
+            return json.loads(stripped).get("path", "")
+        except (json.JSONDecodeError, ValueError):
+            pass
+    return stripped
+
+
+def run_server(timeout=None) -> None:
+    """Persistent server mode: read paths from stdin, write JSON to stdout."""
+    print("READY", flush=True)
+    for line in sys.stdin:
+        file_path = _parse_path(line)
+        if not file_path:
+            continue
+        if timeout is not None:
+            result = _run_with_timeout(extract_sync, (file_path,), timeout)
+        else:
+            try:
+                result = extract_sync(file_path)
+            except Exception as e:
+                result = {"error": str(e), "_extraction_time_ms": 0}
+        print(json.dumps(result), flush=True)
+
+
+def main() -> None:
+    timeout = None
+    args = []
+    for arg in sys.argv[1:]:
+        if arg in ("--ocr", "--no-ocr"):
+            pass  # Accepted but ignored - pdftotext doesn't have OCR config
+        elif arg.startswith("--timeout="):
+            timeout = int(arg.split("=", 1)[1])
+        elif arg.startswith("--format="):
+            _fmt = arg.split("=", 1)[1]
+            if _fmt != "plaintext":
+                print(f"{sys.argv[0]} only supports plaintext output; got --format {_fmt}", file=sys.stderr)
+                sys.exit(64)
+        else:
+            args.append(arg)
+
+    if len(args) < 1:
+        print(
+            "Usage: pdftotext_extract.py [--ocr|--no-ocr] [--timeout=SECS] <mode> <file_path> [additional_files...]",
+            file=sys.stderr,
+        )
+        print("Modes: sync, batch, server", file=sys.stderr)
+        sys.exit(1)
+
+    mode = args[0]
+    file_paths = args[1:]
+
+    try:
+        if mode == "server":
+            run_server(timeout=timeout)
+
+        elif mode == "sync":
+            if len(file_paths) != 1:
+                print("Error: sync mode requires exactly one file", file=sys.stderr)
+                sys.exit(1)
+            payload = extract_sync(file_paths[0])
+            print(json.dumps(payload), end="")
+
+        elif mode == "batch":
+            if len(file_paths) < 1:
+                print("Error: batch mode requires at least one file", file=sys.stderr)
+                sys.exit(1)
+
+            if len(file_paths) == 1:
+                results = extract_batch(file_paths)
+                print(json.dumps(results[0]), end="")
+            else:
+                results = extract_batch(file_paths)
+                print(json.dumps(results), end="")
+
+        else:
+            print(f"Error: Unknown mode '{mode}'. Use sync, batch, or server", file=sys.stderr)
+            sys.exit(1)
+
+    except Exception as e:
+        print(f"Error extracting with pdftotext: {e}", file=sys.stderr)
+        sys.exit(1)
+
+
+if __name__ == "__main__":
+    main()