mirror of
https://github.com/norandom/OpenUltraSAST.git
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Marius CiepluchandClaude Opus 5.5
b4b9308af8
The cache fsynced every payload and manifest -- two per entry, ~18 ms, and a push publishes one entry per question (~22,000 on a WordPress plugin). A read already rejects any entry whose manifest receipt, payload size or payload SHA-256 does not check, so a torn write is a miss, never a wrong answer; the fsyncs bought nothing the verification does not. The broader problem: three quadratic walls in this replay were found one per two-hour run, because all were Python bookkeeping between engine calls and the only record was the engine log. `OUSAST_SAMPLE_PROFILE=<path>` starts an in-process sampler that rewrites the hottest stacks every 30 s, so a run killed at its deadline still names where its time went. The host cannot ptrace the container, hence in-process. The replay harness turns it on per case. Co-Authored-By: Claude Opus 5.5 (1M context) <[email protected]> Claude-Session: https://claude.ai/code/session_01EmM1j46qgKMh3zqD1QMwEo
29 lines
961 B
Python
29 lines
961 B
Python
"""The in-process sampler leaves a readable profile behind, including for a process killed mid-run."""
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import time
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from openultrasast import profiling
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def _busy_quadratic(n: int) -> int:
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seen: list[int] = []
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for i in range(n):
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if i not in seen:
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seen.append(i)
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return len(seen)
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def test_the_sampler_names_the_function_that_holds_the_time(tmp_path, monkeypatch):
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target = tmp_path / "profile.txt"
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monkeypatch.delenv(profiling.ENV, raising=False)
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assert profiling.start() is None # off unless asked for
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assert profiling.start(str(target), interval=0.002, flush=0.2) is not None
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deadline = time.monotonic() + 1.5
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while time.monotonic() < deadline:
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_busy_quadratic(3000)
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time.sleep(0.3)
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text = target.read_text()
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assert text.startswith("samples ")
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self_section = text.split("self (executing):")[1]
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assert "_busy_quadratic" in self_section.splitlines()[1], self_section[:300]
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