docs: record completed Linux OPC UA lifecycle diagnostic

2026-11-10 20:28:11 -05:00
parent 1e4b017f6e
commit da4e27003e
5 changed files with 858 additions and 6 deletions
@@ -603,10 +603,21 @@ were released, with no owned files/descriptors and unchanged keychain fingerprin
 Deletion occurred during copied-certificate untracking with item references still
 live. This establishes that a managed caller is unnecessary for reproduction; it
 does not distinguish native bridge ownership from Apple Security retention or
-authorize a production workaround. A separate matched deletion-order control
-remains under review. The failed first attempt is retained independently.
+authorize a production workaround. The separate
+[matched deletion-order control](../../scripts/validation/opcua-lifecycle-memory/native-retention/PRIVATE_UPSTREAM_HANDOFF.md)
+observed the same 1→201 inventory with both ordinary and deferred deletion.
+The failed first attempt is retained independently. The upstream handoff remains
+private; no application correction has been established.

-#799 and G4 remain open. The [proposed Linux late-slope diagnostic](../../scripts/validation/opcua-lifecycle-memory/LATE_SLOPE.md)
-has implementation design approval only. It retains the cold baseline and first
-resource rejection and cannot emit acceptance. No new long run or release is
-approved; Windows/live interoperability gates remain separate.
+### Completed Linux late-slope diagnostic
+
+The [one-shot result](evidence/2026-11-10-opcua2/late-slope-linux.md) completed
+7,201.014 seconds, 1,937 cycles and 484 restarts on Linux ARM64 .NET 10.0.14,
+source `b18f9723`. All three tests passed, shutdown and container removal were
+verified, and no resource cap tripped. Peak quiescent RSS was 338.99 MiB,
+4.20 MiB below the unchanged cycle-3 cap; the three late-window medians were
+316.35, 317.03 and 317.20 MiB, and the late RSS fit was +0.194 MiB/hour.
+No quiescent PKI descriptor was observed. This tracked diagnostic has
+`acceptance=false`; earlier cold failures remain, and there is no warmed
+baseline, matched representative-load acceptance, or macOS resolution.
+#799 and G4 remain open. Windows and live interoperability gates remain separate.
@@ -112,6 +112,10 @@ criterion, but retained the cold RSS rejection and exit1. The original-SDK adapt
 records partial wire coverage and unsupported ownership/process-memory parity;
 it supplies no approved performance denominator. See [scoped saturation result](evidence/2026-11-10-opcua2/saturation-candidate.md)
 and [original adapter limitations](../../scripts/validation/opcua-lifecycle-memory/baseline-canonical/README.md).
+A later [Linux diagnostic](evidence/2026-11-10-opcua2/late-slope-linux.md)
+completed 7,201.014 seconds and 484 restarts without a cold-cap breach, with a
+4.20 MiB minimum margin at observed quiescent samples. This one tracked run
+does not supersede the earlier failures or satisfy resource acceptance.
 Astra's final source/security review is closed; release remains on HOLD.


@@ -0,0 +1,785 @@
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+        "Threads": {
+          "first": 20,
+          "last": 20,
+          "min": 19,
+          "max": 24,
+          "median": 20.0
+        }
+      }
+    ],
+    "leastSquares": {
+      "sampleCount": 1452,
+      "firstSeconds": 1801.8241442,
+      "lastSeconds": 7193.4335924,
+      "spanSeconds": 5391.6094482,
+      "maximumGapSeconds": 7.64098279999962,
+      "rangeSeconds": [
+        1800,
+        7200
+      ],
+      "units": "bytes/hour",
+      "rss": 203355.13509451656,
+      "retainedManaged": 52381.09375374565
+    },
+    "workCompletedBy1800Seconds": {
+      "cycles": 484,
+      "restarts": 121,
+      "earlierSaturationWorkloadReached": true
+    }
+  },
+  "coldBudget": {
+    "baseline": {
+      "Cycle": 3,
+      "Seconds": 7.6044949,
+      "Sessions": 0,
+      "Subscriptions": 0,
+      "Items": 0,
+      "BrowsePoints": 0,
+      "HistoryPoints": 0,
+      "LiveDataItems": 0,
+      "LiveEventItems": 0,
+      "MonitoredNodes": 0,
+      "Variables": 19,
+      "Folders": 4,
+      "Conditions": 1,
+      "CachedCertificateStores": 2,
+      "Descriptors": 191,
+      "PkiDescriptors": 0,
+      "ManagedBytes": 19923288,
+      "RssBytes": 225640448,
+      "AllocatedBytes": 87148184,
+      "Gen0": 7,
+      "Gen1": 6,
+      "Gen2": 6,
+      "GcCommittedBytes": 42201088,
+      "GcHeapBytes": 20679920,
+      "GcFragmentedBytes": 756632,
+      "PinnedObjects": 1,
+      "PendingFinalizers": 16,
+      "JitMethods": 35715,
+      "JitIlBytes": 4628455,
+      "ActiveTimers": 17,
+      "Threads": 26
+    },
+    "limits": {
+      "retainedManagedGrowthBytes": 67108864,
+      "rssGrowthBytes": 134217728,
+      "fdGrowth": 32
+    },
+    "peakQuiescentRss": {
+      "Cycle": 251,
+      "Seconds": 929.8172991,
+      "Sessions": 0,
+      "Subscriptions": 0,
+      "Items": 0,
+      "BrowsePoints": 0,
+      "HistoryPoints": 0,
+      "LiveDataItems": 0,
+      "LiveEventItems": 0,
+      "MonitoredNodes": 0,
+      "Variables": 19,
+      "Folders": 4,
+      "Conditions": 1,
+      "CachedCertificateStores": 2,
+      "Descriptors": 194,
+      "PkiDescriptors": 0,
+      "ManagedBytes": 19845440,
+      "RssBytes": 355459072,
+      "AllocatedBytes": 5450774872,
+      "Gen0": 627,
+      "Gen1": 564,
+      "Gen2": 502,
+      "GcCommittedBytes": 46583808,
+      "GcHeapBytes": 20637424,
+      "GcFragmentedBytes": 800208,
+      "PinnedObjects": 1,
+      "PendingFinalizers": 16,
+      "JitMethods": 79366,
+      "JitIlBytes": 12178915,
+      "ActiveTimers": 17,
+      "Threads": 22
+    }
+  },
+  "runtimeObservation": {
+    "targetPid": 209,
+    "startupSeconds": 1.3593413,
+    "mappedCoreClr": "/app/libcoreclr.so",
+    "certificateAllocationStackTracking": true,
+    "eventPipeAttached": false
+  }
+}
@@ -0,0 +1,45 @@
+# Linux canonical late-slope diagnostic — completed, no cold-cap breach
+
+One fixed Linux ARM64 diagnostic ran from source
+`b18f97236a033b54945b3b9a1d5e306e11e278a7` with OPC UA SDK 2.0.1,
+HistorianGateway Client/Contracts 1.0.0 and the pinned self-contained .NET 10.0.14
+runtime. The runtime mapping, descriptor controls (2/2), workload (1/1),
+shutdown and removal of the task-owned container were verified. The canonical
+phase completed **7,201.014 seconds, 1,937 cycles and 484 restarts**. The workload,
+container and launcher exited 0. The diagnostic receipt explicitly reports
+`acceptance=false`.
+
+No resource assertion latched. Cycle 3 set the original RSS baseline at
+225,640,448 bytes (215.19 MiB); the unchanged +128 MiB limit was 359,858,176
+bytes (343.19 MiB). The observed quiescent peak was 355,459,072 bytes
+(338.99 MiB) at cycle 251 / 929.817 seconds, **4.20 MiB below the limit**.
+Retained managed memory peaked at 20,410,640 bytes against its cycle-3
+19,923,288-byte baseline; total descriptors peaked at 195 against a baseline of
+191. All 1,937 quiescent samples had zero PKI descriptors and zero live
+session/subscription/continuation/monitored-item inventories.
+
+| Fixed window (minutes) | Samples | Median RSS (MiB) | Min–max RSS (MiB) | Median retained managed (MiB) |
+|---|---:|---:|---:|---:|
+| 30–40 | 162 | 316.35 | 310.81–321.04 | 19.02 |
+| 60–70 | 162 | 317.03 | 309.78–321.66 | 19.10 |
+| 110–120 | 160 | 317.20 | 313.43–320.18 | 19.05 |
+
+Ordinary least squares over all 1,452 quiescent observations from 1,800 through
+7,200 seconds yields **+203,355 RSS bytes/hour (+0.194 MiB/hour)** and
+**+52,381 retained managed bytes/hour (+0.050 MiB/hour)**. The largest gap
+between those observations was 7.641 seconds. At 1,800 seconds, 484 cycles and
+121 restarts had completed, exceeding the earlier restart-step work count
+without asserting new trace readiness.
+
+This is evidence that sampled RSS largely leveled off after startup in this
+**one** tracked Linux run. It does not identify which components own all RSS,
+bound unsampled transient peaks, prove that growth can never recur, or supersede
+the earlier Linux cold failures. No EventPipe observer was attached; certificate
+allocation stack tracking and per-cycle quiescent GC remained enabled. This is
+not uninstrumented resource acceptance, a matched SDK1/SDK2 comparison, or a
+resolution of macOS native import retention. The original cold cap remains
+binding; no warmed-baseline rule was adopted. Issue #799 and G4 remain open.
+
+The [selected receipt](late-slope-linux.json) retains exact identities, raw
+evidence hashes, exit statuses, window statistics and sample counts. The
+[rehearsal](late-slope-rehearsal.json) and its earlier failure remain separate.