pyproc/tests/attempts/pythonMachine/kernelElectionProbe.html at main · eddmpython/pyproc · GitHub

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<!DOCTYPE html>
<!--
Immortal Python Machine 실측. iframe 3개가 실제 독립 browsing context로 Web Locks 선출에
참여한다. leader context를 정상 leave 없이 제거하고, 마지막에는 모든 participant context를
제거한 뒤 새 context를 열어 OPFS의 힙 + /home 세대와 영속 epoch를 복구한다.
-->
<html lang="ko">
<head><meta charset="utf-8"><title>probe: immortal Python machine</title>
<style>body{font:14px/1.5 system-ui;margin:2rem;max-width:58rem} pre{background:#f4f4f5;padding:1rem;border-radius:6px;white-space:pre-wrap}</style></head>
<body>
<h1>probe: Immortal Python Machine</h1>
<pre id="out">실행 중...</pre>
<div id="tabs"></div>
<script type="module">
  const out = document.getElementById("out");
  const checks = [];
  const timings = {};
  const check = (name, pass, info = "") => {
    checks.push({ name, pass: !!pass, info: String(info) });
    out.textContent += `\n${pass ? "PASS" : "FAIL"} ${name}${info ? " (" + info + ")" : ""}`;
  };
  const report = async () => {
    const ok = checks.length > 0 && checks.every((entry) => entry.pass);
    try {
      await fetch("/gateReport", {
        method: "POST",
        headers: { "Content-Type": "application/json" },
        body: JSON.stringify({ ok, checks, timings }),
      });
    } catch (error) {}
  };
  const indexParam = new URLSearchParams(location.search).get("indexURL");
  const query = indexParam ? "?indexURL=" + encodeURIComponent(indexParam) : "";
  const machineName = "immortalProbe";
  const journalName = "pyprocImmortalProbe";
  const tabs = new Map();
  const statuses = new Map();
  const statusEvents = [];
  let sequence = 0;

  window.addEventListener("message", (event) => {
    const message = event.data;
    if (!message || message.from !== "kernelTab") return;
    if (message.event === "status") {
      statuses.set(message.id, message.status);
      statusEvents.push({ id: message.id, status: message.status, time: performance.now() });
      return;
    }
    if (message.reqId != null) {
      for (const tab of tabs.values()) {
        const pending = tab.pending.get(message.reqId);
        if (!pending) continue;
        tab.pending.delete(message.reqId);
        if (message.ok) pending.resolve(message);
        else {
          const error = new Error(message.error);
          error.code = message.code;
          error.retryable = message.retryable;
          error.status = message.status;
          pending.reject(error);
        }
        break;
      }
    }
  });

  function makeTab(tabId) {
    return new Promise((resolve) => {
      const frame = document.createElement("iframe");
      frame.style.width = frame.style.height = "1px";
      const pending = new Map();
      tabs.set(tabId, { frame, pending });
      const onReady = (event) => {
        if (event.data?.from !== "kernelTab" || event.data.event !== "ready" || event.source !== frame.contentWindow) return;
        window.removeEventListener("message", onReady);
        resolve();
      };
      window.addEventListener("message", onReady);
      frame.src = "kernelTab.html" + query;
      document.getElementById("tabs").appendChild(frame);
    });
  }

  function command(tabId, payload) {
    const tab = tabs.get(tabId);
    if (!tab) return Promise.reject(new Error("no tab " + tabId));
    const reqId = "r" + (++sequence);
    return new Promise((resolve, reject) => {
      tab.pending.set(reqId, { resolve, reject });
      tab.frame.contentWindow.postMessage({ to: "kernelTab", tabId, reqId, ...payload }, "*");
    });
  }

  const waitFor = async (predicate, timeoutMs, stepMs = 50) => {
    const deadline = performance.now() + timeoutMs;
    while (performance.now() < deadline) {
      const value = predicate();
      if (value) return value;
      await new Promise((resolve) => setTimeout(resolve, stepMs));
    }
    return null;
  };

  const percentile = (values, ratio) => {
    const sorted = values.slice().sort((a, b) => a - b);
    return +sorted[Math.min(sorted.length - 1, Math.floor(sorted.length * ratio))].toFixed(2);
  };

  const removeTab = (tabId) => {
    const tab = tabs.get(tabId);
    if (!tab) return;
    tab.frame.remove();
    tabs.delete(tabId);
    statuses.delete(tabId);
  };

  try {
    const root = await navigator.storage.getDirectory();
    try { await root.removeEntry(journalName, { recursive: true }); } catch (error) {}

    const initialStarted = performance.now();
    await Promise.all([makeTab("A"), makeTab("B"), makeTab("C")]);
    const joined = await Promise.all(["A", "B", "C"].map((id) => command(id, {
      cmd: "join", name: machineName, journalName, tabId: id,
    })));
    timings.initialReadyMs = Math.round(performance.now() - initialStarted);
    const initialStatuses = joined.map((entry) => entry.status);
    const initialLeader = initialStatuses.find((status) => status.role === "leader");
    const leaderId = initialLeader?.leaderId;
    const initialEpoch = initialLeader?.epoch;
    const followers = ["A", "B", "C"].filter((id) => id !== leaderId);
    timings.leaderBootMs = initialLeader?.bootMs ?? -1;
    const sameIdentity = initialStatuses.every((status) =>
      status.name === machineName && status.leaderId === leaderId && status.epoch === initialEpoch && status.phase === "ready"
    );
    check("3 browsing contexts, exactly one leader, shared identity", initialStatuses.filter((status) => status.role === "leader").length === 1 && sameIdentity,
      `leader=${leaderId}, epoch=${initialEpoch}, ready=${timings.initialReadyMs}ms`);
    check("canonical kernel keeps COI, SAB lane and JSPI", initialStatuses.every((status) => status.crossOriginIsolated && status.jspi),
      `coi=${initialLeader?.crossOriginIsolated}, jspi=${initialLeader?.jspi}`);

    await command(followers[0], { cmd: "run", code: [
      "import os",
      "os.makedirs('/home/web/immortal', exist_ok=True)",
      "sharedValue = 41",
      "open('/home/web/immortal/state.txt', 'w').write('survives')",
    ].join("\n") });
    const shared = await command(followers[1], {
      cmd: "run",
      code: "f'{sharedValue + 1}|{open(\"/home/web/immortal/state.txt\").read()}|{preparedValue}|' + json.dumps({'lane': 'prepared'}, sort_keys=True)",
    });
    const collisionPair = await Promise.all([
      command(followers[0], { cmd: "run", code: "'participant-left'" }),
      command(followers[1], { cmd: "run", code: "'participant-right'" }),
    ]);
    check("followers share variables, /home, prepared environment and collision-free request IDs",
      shared.result === '42|survives|7|{"lane": "prepared"}' &&
      collisionPair[0].result === "participant-left" && collisionPair[1].result === "participant-right",
      `${shared.result} | ${collisionPair.map((entry) => entry.result).join("/")}`);

    const rpcSamples = [];
    for (let i = 0; i < 30; i++) {
      const started = performance.now();
      await command(followers[0], { cmd: "run", code: "1 + 1" });
      rpcSamples.push(performance.now() - started);
    }
    timings.rpcP50Ms = percentile(rpcSamples, 0.5);
    timings.rpcP90Ms = percentile(rpcSamples, 0.9);
    const lateOutcome = await command(followers[0], {
      cmd: "run", code: "import asyncio\nawait asyncio.sleep(0.2)\n'late-response'", async: true, timeoutMs: 50,
    }).then((result) => ({ ok: true, result }), (error) => ({ ok: false, error }));
    await new Promise((resolve) => setTimeout(resolve, 300));
    const afterLate = await command(followers[1], { cmd: "run", code: "40 + 3" });
    check("participant RPC stays below 3ms p50 and ignores a late response after timeout",
      timings.rpcP50Ms < 3 && lateOutcome.ok === false && lateOutcome.error.code === "PYPROC_RPC_OUTCOME_UNKNOWN" && afterLate.result === 43,
      `p50=${timings.rpcP50Ms}ms, p90=${timings.rpcP90Ms}ms, late=${lateOutcome.ok ? "unexpected" : lateOutcome.error.code}`);

    const commit = await command(followers[0], { cmd: "commit", timeoutMs: 12000 });
    check("follower commit durably seals heap and /home", !!commit.commit?.committedAt && commit.commit?.home?.files === 1,
      `pages=${commit.commit?.pages}, homeFiles=${commit.commit?.home?.files}`);

    const uncertainRequest = command(followers[0], {
      cmd: "run",
      code: "import asyncio\nawait asyncio.sleep(10)\nuncertainCount = globals().get('uncertainCount', 0) + 1\nuncertainCount",
      async: true,
      timeoutMs: 7000,
    }).then((result) => ({ ok: true, result }), (error) => ({ ok: false, error }));
    await waitFor(() => statuses.get(followers[0])?.pendingRequests === 1, 2000);
    const killAt = performance.now();
    removeTab(leaderId);
    const promoted = await waitFor(() => statusEvents.find((entry) =>
      entry.time >= killAt && entry.status.phase === "ready" && entry.status.epoch > initialEpoch && entry.status.leaderId !== leaderId
    ), 7000);
    timings.failoverMs = promoted ? Math.round(promoted.time - killAt) : -1;
    const promotedStatus = promoted?.status;
    const newLeaderId = promotedStatus?.leaderId;
    const survivorIds = followers.filter((id) => tabs.has(id));
    const survivorStatuses = await Promise.all(survivorIds.map((id) => command(id, { cmd: "status" })));
    check("forced leader context removal elects one fenced successor", !!promotedStatus && timings.failoverMs < 5000 &&
      survivorStatuses.filter((entry) => entry.status.role === "leader").length === 1 && promotedStatus.epoch === initialEpoch + 1,
      `leader=${newLeaderId}, epoch=${promotedStatus?.epoch}, failover=${timings.failoverMs}ms`);
    timings.recoveryMs = promotedStatus?.recoveryMs ?? -1;
    check("successor reports journal recovery", promotedStatus?.recovered === true, `recovery=${timings.recoveryMs}ms`);

    const afterFailover = await command(survivorIds[0], {
      cmd: "run",
      code: "f'{sharedValue}|{open(\"/home/web/immortal/state.txt\").read()}|{preparedValue}|' + json.dumps({'lane': 'prepared'}, sort_keys=True)",
      timeoutMs: 9000,
    });
    check("failover restores variable, /home and prepared environment, then keeps running",
      afterFailover.result === '41|survives|7|{"lane": "prepared"}', afterFailover.result);

    const uncertain = await uncertainRequest;
    const uncertainStatus = await command(followers[0], { cmd: "status" });
    check("in-flight failover RPC has explicit non-retryable unknown outcome and no leak",
      uncertain.ok === false && uncertain.error.code === "PYPROC_RPC_OUTCOME_UNKNOWN" && uncertain.error.retryable === false && uncertainStatus.status.pendingRequests === 0,
      uncertain.ok ? "unexpected success" : `${uncertain.error.code}, pending=${uncertainStatus.status.pendingRequests}`);
    const uncertainValue = await command(survivorIds[1], { cmd: "run", code: "globals().get('uncertainCount', 0)" });
    check("unknown-outcome request is not auto-replayed on successor", uncertainValue.result === 0, `uncertainCount=${uncertainValue.result}`);

    await command(survivorIds[0], { cmd: "run", code: [
      "coldValue = 99",
      "open('/home/web/immortal/state.txt', 'w').write('cold-survives')",
    ].join("\n") });
    const coldCommit = await command(survivorIds[1], { cmd: "commit", timeoutMs: 12000 });
    const coldEpoch = coldCommit.status.epoch;
    for (const id of survivorIds) removeTab(id);

    const reopenStarted = performance.now();
    await makeTab("D");
    const reopened = await command("D", { cmd: "join", name: machineName, journalName, tabId: "D" });
    timings.coldReopenMs = Math.round(performance.now() - reopenStarted);
    const reopenedValue = await command("D", {
      cmd: "run",
      code: "f'{sharedValue}|{coldValue}|{open(\"/home/web/immortal/state.txt\").read()}|{preparedValue}|' + json.dumps({'lane': 'prepared'}, sort_keys=True)",
    });
    check("all participants gone, new context cold-reopens last commit", reopened.status.role === "leader" && reopened.status.recovered === true &&
      reopened.status.epoch === coldEpoch + 1 && reopenedValue.result === '41|99|cold-survives|7|{"lane": "prepared"}',
      `epoch=${reopened.status.epoch}, value=${reopenedValue.result}, ${timings.coldReopenMs}ms`);
    check("durable epoch, leader identity and commit time are observable", reopened.status.leaderId === "D" &&
      reopened.status.participantId === "D" && reopened.status.lastCommitAt === coldCommit.commit.committedAt,
      `leader=${reopened.status.leaderId}, committedAt=${reopened.status.lastCommitAt}`);

    await command("D", { cmd: "leave" });
    removeTab("D");
    await root.removeEntry(journalName, { recursive: true });
  } catch (error) {
    check("uncaught", false, String(error.stack || error).slice(-500));
    for (const id of [...tabs.keys()]) removeTab(id);
  }
  await report();
</script>
</body></html>