Reference chains for surviving live-heap samples (PROF-15341)#644
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CI Test ResultsRun: #29577544496 | Commit:
Status Overview
Legend: ✅ passed | ❌ failed | ⚪ skipped | 🚫 cancelled Summary: Total: 32 | Passed: 32 | Failed: 0 Updated: 2026-07-17 11:56:50 UTC |
Contributor
Reliability & Chaos Results✅ All reliability & chaos checks passed Pipeline: https://gitlab.ddbuild.io/DataDog/java-profiler/-/pipelines/125072101 |
Contributor
Benchmark Results (commit cfec595)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/123822759 Commit:
|
| Benchmark | JDK | Latest | Dev | Δ (dev vs latest) | Issues L/D |
|---|---|---|---|---|---|
| akka-uct | 25 | 💥 0 ms (0 iters) | 💥 0 ms (0 iters) | — | — / — |
Internal counter details (ddprof)
ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
| Benchmark | JDK | Dropped rec | Dropped jvmti | Dropped trace | Skipped WC | AGCT fail | Unwind fail |
|---|---|---|---|---|---|---|---|
| akka-uct | 21 | ✅ / ✅ | ✅ / ✅ | 3 / 1 | 1949 / 2055 | ✅ / ✅ | ✅ / ✅ |
| akka-uct | 25 | ✅ / · | ✅ / · | ✅ / · | ✅ / · | ✅ / · | ✅ / · |
| finagle-chirper | 21 | ✅ / ✅ | ✅ / ✅ | 4 / 1 | 8727 / 8389 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 1 | 8166 / 8396 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 21 | ✅ / ✅ | ✅ / ✅ | 3 / 2 | 1292 / 1256 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 25 | ✅ / ✅ | ✅ / ✅ | 3 / 1 | 1288 / 1290 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 1 | 2830 / 3023 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 25 | ✅ / ✅ | ✅ / ✅ | 2 / ✅ | 2976 / 2821 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 21 | · / ✅ | · / ✅ | · / 3 | · / 3555 | · / ✅ | · / ✅ |
| naive-bayes | 25 | ✅ / ✅ | ✅ / ✅ | 2 / 3 | 3499 / 3485 | ✅ / ✅ | ✅ / ✅ |
| reactors | 21 | ✅ / ✅ | ✅ / ✅ | 1 / 1 | 1592 / 1697 | ✅ / ✅ | ✅ / ✅ |
| reactors | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / 1 | 1922 / 1854 | ✅ / ✅ | ✅ / ✅ |
jbachorik
added a commit
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Jul 10, 2026
…racking Addresses review findings from PR #644 (reference chains for surviving live-heap samples): FrontierTable's shared-lock mutation race, a single-byte JFR event size prefix that silently truncates chains longer than 255 bytes, blocking sample-lock retries in writeReferenceChain() now bounded by a shared per-batch deadline with a drop counter, unvalidated referencechains sub-option values, a startThread()/ pthread_kill() race publishing _running before the thread handle is initialized, a null-JNIEnv leak in threadLoop(), releaseSearchTags() now surfacing GetObjectsWithTags() failures so restartSearch() never resets tag state prematurely, resolveLoadedClasses() skipping its per-class scan only when the loaded-class count is unchanged (not just non-decreasing), a spurious COMPLETED state after a failed first-pass FollowReferences call, and removal of a leftover debug helper in ExternalProcessReferenceChainTest. Adds regression test coverage for release-failure and negative-value option paths. Verified via the full ddprof-lib gtestDebug suite (149/149 tasks, 57/57 referenceChains_ut tests). Environment: Datadog workspace Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Contributor
Benchmark Results (commit 0714bd3)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124004132 Commit:
|
| Benchmark | JDK | Latest | Dev | Δ (dev vs latest) | Issues L/D |
|---|---|---|---|---|---|
| akka-uct | 21 | ✅ 10184 ms (21 iters) | ✅ 10371 ms (21 iters) | ≈ +1.8% (±11.5%) | — / — |
| akka-uct | 25 | ✅ 8891 ms (24 iters) | ✅ 8865 ms (24 iters) | ≈ -0.3% (±10.2%) | — / — |
| finagle-chirper | 21 | ✅ 6003 ms (33 iters) | ✅ 6034 ms (33 iters) | ≈ +0.5% (±25.2%) | |
| finagle-chirper | 25 | ✅ 5507 ms (36 iters) | ✅ 5426 ms (36 iters) | ≈ -1.5% (±23.8%) | |
| fj-kmeans | 21 | ✅ 2834 ms (66 iters) | ✅ 2761 ms (67 iters) | 🟢 -2.6% | — / — |
| fj-kmeans | 25 | ✅ 2824 ms (66 iters) | ✅ 2838 ms (66 iters) | ≈ +0.5% (±2.7%) | — / — |
| future-genetic | 21 | ✅ 2113 ms (88 iters) | ✅ 2065 ms (89 iters) | ≈ -2.3% (±2.6%) | — / — |
| future-genetic | 25 | ✅ 2059 ms (90 iters) | ✅ 2102 ms (89 iters) | ≈ +2.1% (±2.6%) | — / — |
| naive-bayes | 21 | ✅ 1283 ms (134 iters) | ✅ 1260 ms (135 iters) | ≈ -1.8% (±32%) | — / — |
| naive-bayes | 25 | ✅ 1016 ms (169 iters) | ✅ 1017 ms (168 iters) | ≈ +0.1% (±31.5%) | — / — |
| reactors | 21 | ✅ 16658 ms (15 iters) | ✅ 16371 ms (16 iters) | ≈ -1.7% (±9%) | — / — |
| reactors | 25 | ✅ 18507 ms (15 iters) | ✅ 18056 ms (15 iters) | ≈ -2.4% (±5.6%) | — / — |
Internal counter details (ddprof)
ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
| Benchmark | JDK | Dropped rec | Dropped jvmti | Dropped trace | Skipped WC | AGCT fail | Unwind fail |
|---|---|---|---|---|---|---|---|
| akka-uct | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 1 | 1929 / 2034 | ✅ / ✅ | ✅ / ✅ |
| akka-uct | 25 | ✅ / ✅ | ✅ / ✅ | 3 / 1 | 2310 / 2113 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 21 | ✅ / ✅ | ✅ / ✅ | 4 / 5 | 8529 / 8852 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 25 | ✅ / ✅ | ✅ / ✅ | 2 / 2 | 8635 / 8390 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 21 | ✅ / ✅ | ✅ / ✅ | 1 / 5 | 1284 / 1281 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 25 | ✅ / ✅ | ✅ / ✅ | 5 / 2 | 1283 / 1285 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 21 | ✅ / ✅ | ✅ / ✅ | 1 / 1 | 2930 / 2864 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 25 | ✅ / ✅ | ✅ / ✅ | 2 / ✅ | 2963 / 2953 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 21 | ✅ / ✅ | ✅ / ✅ | 7 / 6 | 3558 / 3510 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 25 | ✅ / ✅ | ✅ / ✅ | 2 / 4 | 3463 / 3469 | ✅ / ✅ | ✅ / ✅ |
| reactors | 21 | ✅ / ✅ | ✅ / ✅ | 1 / 1 | 1564 / 1782 | ✅ / ✅ | ✅ / ✅ |
| reactors | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / ✅ | 1905 / 1681 | ✅ / ✅ | ✅ / ✅ |
Contributor
Benchmark Results (commit 700d838)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124275960 Commit:
|
| Benchmark | JDK | Latest | Dev | Δ (dev vs latest) | Issues L/D |
|---|---|---|---|---|---|
| akka-uct | 21 | ✅ 10425 ms (21 iters) | ✅ 10259 ms (21 iters) | ≈ -1.6% (±11.1%) | — / — |
| akka-uct | 25 | ✅ 8748 ms (24 iters) | ✅ 8797 ms (24 iters) | ≈ +0.6% (±10.5%) | — / — |
| finagle-chirper | 21 | ✅ 5970 ms (33 iters) | ✅ 5982 ms (33 iters) | ≈ +0.2% (±25.3%) | |
| finagle-chirper | 25 | ✅ 5469 ms (36 iters) | ✅ 5468 ms (36 iters) | ≈ -0% (±24.3%) | |
| fj-kmeans | 21 | ✅ 2598 ms (73 iters) | ✅ 2715 ms (69 iters) | 🔴 +4.5% | — / — |
| fj-kmeans | 25 | ✅ 2784 ms (67 iters) | ✅ 2847 ms (66 iters) | ≈ +2.3% (±2.7%) | — / — |
| future-genetic | 21 | ✅ 2122 ms (87 iters) | ✅ 2126 ms (88 iters) | ≈ +0.2% (±2.7%) | — / — |
| future-genetic | 25 | ✅ 2035 ms (91 iters) | ✅ 2057 ms (91 iters) | ≈ +1.1% (±2.7%) | — / — |
| naive-bayes | 21 | ✅ 1304 ms (131 iters) | ✅ 1253 ms (136 iters) | ≈ -3.9% (±32.2%) | — / — |
| naive-bayes | 25 | ✅ 1015 ms (169 iters) | ✅ 1018 ms (168 iters) | ≈ +0.3% (±31.8%) | — / — |
| reactors | 21 | ✅ 16107 ms (15 iters) | ✅ 16847 ms (15 iters) | ≈ +4.6% (±7.9%) | — / — |
| reactors | 25 | ✅ 18469 ms (15 iters) | ✅ 19075 ms (14 iters) | ≈ +3.3% (±4.9%) | — / — |
Internal counter details (ddprof)
ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
| Benchmark | JDK | Dropped rec | Dropped jvmti | Dropped trace | Skipped WC | AGCT fail | Unwind fail |
|---|---|---|---|---|---|---|---|
| akka-uct | 21 | ✅ / ✅ | ✅ / ✅ | 3 / ✅ | 1950 / 1991 | ✅ / ✅ | ✅ / ✅ |
| akka-uct | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / 2 | 2228 / 2453 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 21 | ✅ / ✅ | ✅ / ✅ | 6 / 2 | 8686 / 8417 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 1 | 8561 / 8290 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 2 | 1272 / 1289 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 25 | ✅ / ✅ | ✅ / ✅ | 2 / ✅ | 1287 / 1298 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 21 | ✅ / ✅ | ✅ / ✅ | 1 / ✅ | 2912 / 3017 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / 1 | 2907 / 2872 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 3 | 3515 / 3489 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 25 | ✅ / ✅ | ✅ / ✅ | 2 / 7 | 3498 / 3463 | ✅ / ✅ | ✅ / ✅ |
| reactors | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 2 | 1732 / 1701 | ✅ / ✅ | ✅ / ✅ |
| reactors | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / ✅ | 1780 / 1924 | ✅ / ✅ | ✅ / ✅ |
jbachorik
added a commit
that referenced
this pull request
Jul 14, 2026
…racking Addresses review findings from PR #644 (reference chains for surviving live-heap samples): FrontierTable's shared-lock mutation race, a single-byte JFR event size prefix that silently truncates chains longer than 255 bytes, blocking sample-lock retries in writeReferenceChain() now bounded by a shared per-batch deadline with a drop counter, unvalidated referencechains sub-option values, a startThread()/ pthread_kill() race publishing _running before the thread handle is initialized, a null-JNIEnv leak in threadLoop(), releaseSearchTags() now surfacing GetObjectsWithTags() failures so restartSearch() never resets tag state prematurely, resolveLoadedClasses() skipping its per-class scan only when the loaded-class count is unchanged (not just non-decreasing), a spurious COMPLETED state after a failed first-pass FollowReferences call, and removal of a leftover debug helper in ExternalProcessReferenceChainTest. Adds regression test coverage for release-failure and negative-value option paths. Verified via the full ddprof-lib gtestDebug suite (149/149 tasks, 57/57 referenceChains_ut tests). Environment: Datadog workspace Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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Benchmark Results (commit 9972bff)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124511782 Commit: ✅ Within expected boundariesNo significant runtime deltas (all within run-to-run noise) and no internal-counter outliers. Runtime details (per benchmark × JDK)
Internal counter details (ddprof)ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
|
Contributor
Benchmark Results (commit a636398)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124700626 Commit: ✅ Within expected boundariesNo significant runtime deltas (all within run-to-run noise) and no internal-counter outliers. Runtime details (per benchmark × JDK)
Internal counter details (ddprof)ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
|
Contributor
Benchmark Results (commit f2d8978)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124747648 Commit: ✅ Within expected boundariesNo significant runtime deltas (all within run-to-run noise) and no internal-counter outliers. Runtime details (per benchmark × JDK)
Internal counter details (ddprof)ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
|
Contributor
Benchmark Results (commit a48899b)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124773626 Commit:
|
| Benchmark | JDK | Latest | Dev | Δ (dev vs latest) | Issues L/D |
|---|---|---|---|---|---|
| akka-uct | 21 | ✅ 10376 ms (21 iters) | ✅ 10228 ms (21 iters) | ≈ -1.4% (±11%) | — / — |
| akka-uct | 25 | ✅ 8829 ms (24 iters) | ✅ 8859 ms (24 iters) | ≈ +0.3% (±10%) | — / — |
| finagle-chirper | 21 | ✅ 6001 ms (33 iters) | ✅ 5928 ms (33 iters) | ≈ -1.2% (±25.2%) | |
| finagle-chirper | 25 | ✅ 5469 ms (36 iters) | ✅ 5475 ms (36 iters) | ≈ +0.1% (±24.5%) | |
| fj-kmeans | 21 | ✅ 2687 ms (70 iters) | ✅ 2761 ms (68 iters) | 🔴 +2.8% | — / — |
| fj-kmeans | 25 | ✅ 2810 ms (66 iters) | ✅ 2805 ms (66 iters) | ≈ -0.2% (±2.6%) | — / — |
| future-genetic | 21 | ✅ 2047 ms (91 iters) | ✅ 2116 ms (88 iters) | 🔴 +3.4% | — / — |
| future-genetic | 25 | ✅ 2000 ms (93 iters) | ✅ 2083 ms (89 iters) | 🔴 +4.2% | — / — |
| naive-bayes | 21 | ✅ 1256 ms (136 iters) | ✅ 1253 ms (136 iters) | ≈ -0.2% (±32.8%) | — / — |
| naive-bayes | 25 | ✅ 1016 ms (169 iters) | ✅ 1016 ms (169 iters) | ≈ 0% (±31.3%) | — / — |
| reactors | 21 | ✅ 16870 ms (15 iters) | ✅ 16463 ms (15 iters) | ≈ -2.4% (±7.3%) | — / — |
| reactors | 25 | ✅ 18270 ms (15 iters) | ✅ 18333 ms (15 iters) | ≈ +0.3% (±4.5%) | — / — |
Internal counter details (ddprof)
ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
| Benchmark | JDK | Dropped rec | Dropped jvmti | Dropped trace | Skipped WC | AGCT fail | Unwind fail |
|---|---|---|---|---|---|---|---|
| akka-uct | 21 | ✅ / ✅ | ✅ / ✅ | 4 / 2 | 1988 / 2024 | ✅ / ✅ | ✅ / ✅ |
| akka-uct | 25 | ✅ / ✅ | ✅ / ✅ | 2 / 3 | 2263 / 2395 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 21 | ✅ / ✅ | ✅ / ✅ | 1 / 6 | 8440 / 8679 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / 2 | 8283 / 8410 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 1 | 1288 / 1260 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 25 | ✅ / ✅ | ✅ / ✅ | 4 / 4 | 1250 / 1295 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 21 | ✅ / ✅ | ✅ / ✅ | 3 / 2 | 2968 / 3003 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / 1 | 2843 / 2902 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 21 | ✅ / ✅ | ✅ / ✅ | 4 / 5 | 3474 / 3510 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 25 | ✅ / ✅ | ✅ / ✅ | 3 / 2 | 3495 / 3488 | ✅ / ✅ | ✅ / ✅ |
| reactors | 21 | ✅ / ✅ | ✅ / ✅ | ✅ / ✅ | 1726 / 1721 | ✅ / ✅ | ✅ / ✅ |
| reactors | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / 3 | 1893 / 1750 | ✅ / ✅ | ✅ / ✅ |
Contributor
Benchmark Results (commit 787f29e)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124811024 Commit:
|
| Benchmark | JDK | Latest | Dev | Δ (dev vs latest) | Issues L/D |
|---|---|---|---|---|---|
| akka-uct | 21 | ✅ 10215 ms (21 iters) | ✅ 10475 ms (21 iters) | ≈ +2.5% (±11.9%) | — / — |
| akka-uct | 25 | ✅ 8843 ms (24 iters) | ✅ 8861 ms (24 iters) | ≈ +0.2% (±10.5%) | — / — |
| finagle-chirper | 21 | ✅ 5986 ms (33 iters) | ✅ 5971 ms (33 iters) | ≈ -0.3% (±25.5%) | |
| finagle-chirper | 25 | ✅ 5515 ms (36 iters) | ✅ 5479 ms (36 iters) | ≈ -0.7% (±24.2%) | |
| fj-kmeans | 21 | ✅ 2693 ms (70 iters) | ✅ 2836 ms (66 iters) | 🔴 +5.3% | — / — |
| fj-kmeans | 25 | ✅ 2820 ms (66 iters) | ✅ 2837 ms (66 iters) | ≈ +0.6% (±2.6%) | — / — |
| future-genetic | 21 | ✅ 2059 ms (90 iters) | ✅ 2070 ms (89 iters) | ≈ +0.5% (±2.6%) | — / — |
| future-genetic | 25 | ✅ 2089 ms (89 iters) | ✅ 2130 ms (87 iters) | ≈ +2% (±2.6%) | — / — |
| naive-bayes | 21 | ✅ 1284 ms (133 iters) | ✅ 1313 ms (131 iters) | ≈ +2.3% (±33%) | — / — |
| naive-bayes | 25 | ✅ 1009 ms (170 iters) | ✅ 988 ms (173 iters) | ≈ -2.1% (±31.4%) | — / — |
| reactors | 21 | ✅ 16540 ms (15 iters) | ✅ 16155 ms (15 iters) | ≈ -2.3% (±7.1%) | — / — |
| reactors | 25 | ✅ 18545 ms (15 iters) | ✅ 18816 ms (15 iters) | ≈ +1.5% (±4.2%) | — / — |
Internal counter details (ddprof)
ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
| Benchmark | JDK | Dropped rec | Dropped jvmti | Dropped trace | Skipped WC | AGCT fail | Unwind fail |
|---|---|---|---|---|---|---|---|
| akka-uct | 21 | ✅ / ✅ | ✅ / ✅ | 3 / 2 | 1987 / 1990 | ✅ / ✅ | ✅ / ✅ |
| akka-uct | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 4 | 2238 / 2323 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 2 | 8290 / 8529 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / 1 | 8323 / 8386 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 21 | ✅ / ✅ | ✅ / ✅ | 3 / 1 | 1299 / 1277 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / ✅ | 1274 / 1299 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 21 | ✅ / ✅ | ✅ / ✅ | 2 / ✅ | 2920 / 2982 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 25 | ✅ / ✅ | ✅ / ✅ | 2 / 4 | 2886 / 2864 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 21 | ✅ / ✅ | ✅ / ✅ | ✅ / ✅ | ✅ / ✅ | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 25 | ✅ / ✅ | ✅ / ✅ | 4 / 1 | 3505 / 3499 | ✅ / ✅ | ✅ / ✅ |
| reactors | 21 | ✅ / ✅ | ✅ / ✅ | ✅ / ✅ | 1593 / 1669 | ✅ / ✅ | ✅ / ✅ |
| reactors | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 1 | 1849 / 1940 | ✅ / ✅ | ✅ / ✅ |
Contributor
Benchmark Results (commit fede524)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124833099 Commit: ✅ Within expected boundariesNo significant runtime deltas (all within run-to-run noise) and no internal-counter outliers. Runtime details (per benchmark × JDK)
Internal counter details (ddprof)ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
|
Contributor
Benchmark Results (commit ef0f5c6)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124961539 Commit: ✅ Within expected boundariesNo significant runtime deltas (all within run-to-run noise) and no internal-counter outliers. Runtime details (per benchmark × JDK)
Internal counter details (ddprof)ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
|
Contributor
Benchmark Results (commit 1299316)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124967829 Commit:
|
| Benchmark | JDK | Latest | Dev | Δ (dev vs latest) | Issues L/D |
|---|---|---|---|---|---|
| akka-uct | 21 | ✅ 10336 ms (21 iters) | ✅ 10245 ms (21 iters) | ≈ -0.9% (±11.5%) | — / — |
| akka-uct | 25 | ✅ 8868 ms (24 iters) | ✅ 8789 ms (24 iters) | ≈ -0.9% (±10.7%) | — / — |
| finagle-chirper | 21 | ✅ 5968 ms (33 iters) | ✅ 5971 ms (33 iters) | ≈ +0.1% (±25.8%) | |
| finagle-chirper | 25 | ✅ 5510 ms (36 iters) | ✅ 5537 ms (36 iters) | ≈ +0.5% (±24.5%) | |
| fj-kmeans | 21 | ✅ 2696 ms (69 iters) | ✅ 2822 ms (66 iters) | 🔴 +4.7% | — / — |
| fj-kmeans | 25 | ✅ 2842 ms (66 iters) | ✅ 2746 ms (68 iters) | 🟢 -3.4% | — / — |
| future-genetic | 21 | ✅ 2068 ms (90 iters) | ✅ 2051 ms (90 iters) | ≈ -0.8% (±2.6%) | — / — |
| future-genetic | 25 | ✅ 2134 ms (87 iters) | ✅ 2059 ms (90 iters) | 🟢 -3.5% | — / — |
| naive-bayes | 21 | ✅ 1318 ms (130 iters) | ✅ 1253 ms (136 iters) | ≈ -4.9% (±31.8%) | — / — |
| naive-bayes | 25 | ✅ 998 ms (171 iters) | ✅ 1025 ms (167 iters) | ≈ +2.7% (±32.1%) | — / — |
| reactors | 21 | ✅ 16264 ms (15 iters) | ✅ 16625 ms (15 iters) | ≈ +2.2% (±7.4%) | — / — |
| reactors | 25 | ✅ 17926 ms (15 iters) | ✅ 18917 ms (15 iters) | ≈ +5.5% (±5.6%) | — / — |
Internal counter details (ddprof)
ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
| Benchmark | JDK | Dropped rec | Dropped jvmti | Dropped trace | Skipped WC | AGCT fail | Unwind fail |
|---|---|---|---|---|---|---|---|
| akka-uct | 21 | ✅ / ✅ | ✅ / ✅ | ✅ / 1 | 1917 / 1934 | ✅ / ✅ | ✅ / ✅ |
| akka-uct | 25 | ✅ / ✅ | ✅ / ✅ | 3 / 3 | 2285 / 2434 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 21 | ✅ / ✅ | ✅ / ✅ | 6 / 2 | 8503 / 8628 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 25 | ✅ / ✅ | ✅ / ✅ | 2 / 2 | 8331 / 8664 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 1 | 1287 / 1266 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 25 | ✅ / ✅ | ✅ / ✅ | 2 / 2 | 1277 / 1290 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 21 | ✅ / ✅ | ✅ / ✅ | 1 / 3 | 3037 / 2981 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 25 | ✅ / ✅ | ✅ / ✅ | 1 / ✅ | 2897 / 2943 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 21 | ✅ / ✅ | ✅ / ✅ | 3 / 12 | 3507 / 3493 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 25 | ✅ / ✅ | ✅ / ✅ | 5 / 5 | 3446 / 3481 | ✅ / ✅ | ✅ / ✅ |
| reactors | 21 | ✅ / ✅ | ✅ / ✅ | 4 / ✅ | 1765 / 1665 | ✅ / ✅ | ✅ / ✅ |
| reactors | 25 | ✅ / ✅ | ✅ / ✅ | 1 / ✅ | 1855 / 1920 | ✅ / ✅ | ✅ / ✅ |
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…racking Addresses review findings from PR #644 (reference chains for surviving live-heap samples): FrontierTable's shared-lock mutation race, a single-byte JFR event size prefix that silently truncates chains longer than 255 bytes, blocking sample-lock retries in writeReferenceChain() now bounded by a shared per-batch deadline with a drop counter, unvalidated referencechains sub-option values, a startThread()/ pthread_kill() race publishing _running before the thread handle is initialized, a null-JNIEnv leak in threadLoop(), releaseSearchTags() now surfacing GetObjectsWithTags() failures so restartSearch() never resets tag state prematurely, resolveLoadedClasses() skipping its per-class scan only when the loaded-class count is unchanged (not just non-decreasing), a spurious COMPLETED state after a failed first-pass FollowReferences call, and removal of a leftover debug helper in ExternalProcessReferenceChainTest. Adds regression test coverage for release-failure and negative-value option paths. Verified via the full ddprof-lib gtestDebug suite (149/149 tasks, 57/57 referenceChains_ut tests). Environment: Datadog workspace Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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Benchmark Results (commit baba070)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124983919 Commit: ✅ Within expected boundariesNo significant runtime deltas (all within run-to-run noise) and no internal-counter outliers. Runtime details (per benchmark × JDK)
Internal counter details (ddprof)ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
|
Contributor
Benchmark Results (commit 35c49c2)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/124997895 Commit:
|
| Benchmark | JDK | Latest | Dev | Δ (dev vs latest) | Issues L/D |
|---|---|---|---|---|---|
| akka-uct | 21 | ✅ 10367 ms (21 iters) | ✅ 10371 ms (21 iters) | ≈ +0% (±11.3%) | — / — |
| akka-uct | 25 | ✅ 8917 ms (24 iters) | ✅ 8766 ms (24 iters) | ≈ -1.7% (±10.2%) | — / — |
| finagle-chirper | 21 | ✅ 5986 ms (33 iters) | ✅ 5972 ms (33 iters) | ≈ -0.2% (±25.3%) | |
| fj-kmeans | 21 | ✅ 2801 ms (67 iters) | ✅ 2750 ms (68 iters) | ≈ -1.8% (±2.6%) | — / — |
| fj-kmeans | 25 | ✅ 2842 ms (66 iters) | ✅ 2756 ms (68 iters) | 🟢 -3% | — / — |
| future-genetic | 21 | ✅ 2142 ms (87 iters) | ✅ 2080 ms (89 iters) | 🟢 -2.9% | — / — |
| future-genetic | 25 | ✅ 1991 ms (94 iters) | ✅ 2035 ms (91 iters) | ≈ +2.2% (±2.7%) | — / — |
| naive-bayes | 25 | ✅ 1025 ms (167 iters) | ✅ 1010 ms (169 iters) | ≈ -1.5% (±31.4%) | — / — |
| reactors | 21 | ✅ 16244 ms (15 iters) | ✅ 16474 ms (15 iters) | ≈ +1.4% (±7.9%) | — / — |
| reactors | 25 | ✅ 18288 ms (15 iters) | ✅ 18332 ms (15 iters) | ≈ +0.2% (±3.9%) | — / — |
Internal counter details (ddprof)
ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
| Benchmark | JDK | Dropped rec | Dropped jvmti | Dropped trace | Skipped WC | AGCT fail | Unwind fail |
|---|---|---|---|---|---|---|---|
| akka-uct | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 4 | 1950 / 1991 | ✅ / ✅ | ✅ / ✅ |
| akka-uct | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 1 | 2303 / 2180 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 6 | 8767 / 8881 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 25 | ✅ / ✅ | ✅ / ✅ | 2 / 1 | 8034 / 8300 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 21 | ✅ / ✅ | ✅ / ✅ | 1 / 1 | 1316 / 1287 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 2 | 1289 / 1282 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 21 | ✅ / ✅ | ✅ / ✅ | 2 / ✅ | 2889 / 2882 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 25 | ✅ / ✅ | ✅ / ✅ | 3 / 1 | 2935 / 2838 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 21 | ✅ / ✅ | ✅ / ✅ | 8 / 2 | 3496 / 3495 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 25 | ✅ / ✅ | ✅ / ✅ | 4 / 4 | 3477 / 3510 | ✅ / ✅ | ✅ / ✅ |
| reactors | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 1 | 1642 / 1586 | ✅ / ✅ | ✅ / ✅ |
| reactors | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 3 | 1802 / 1759 | ✅ / ✅ | ✅ / ✅ |
Contributor
Benchmark Results (commit a9fb05f)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/125008807 Commit:
|
| Benchmark | JDK | Latest | Dev | Δ (dev vs latest) | Issues L/D |
|---|---|---|---|---|---|
| akka-uct | 21 | ✅ 10309 ms (21 iters) | ✅ 10453 ms (21 iters) | ≈ +1.4% (±11%) | — / — |
| akka-uct | 25 | ✅ 8814 ms (24 iters) | ✅ 8779 ms (24 iters) | ≈ -0.4% (±10.4%) | — / — |
| finagle-chirper | 21 | ✅ 6006 ms (33 iters) | ✅ 6047 ms (33 iters) | ≈ +0.7% (±25.8%) | |
| finagle-chirper | 25 | ✅ 5467 ms (36 iters) | ✅ 5455 ms (36 iters) | ≈ -0.2% (±24.8%) | |
| fj-kmeans | 21 | ✅ 2772 ms (68 iters) | ✅ 2687 ms (70 iters) | 🟢 -3.1% | — / — |
| fj-kmeans | 25 | ✅ 2810 ms (66 iters) | ✅ 2801 ms (66 iters) | ≈ -0.3% (±2.6%) | — / — |
| future-genetic | 21 | ✅ 2087 ms (88 iters) | ✅ 2055 ms (90 iters) | ≈ -1.5% (±2.7%) | — / — |
| future-genetic | 25 | ✅ 2088 ms (89 iters) | ✅ 2046 ms (91 iters) | ≈ -2% (±2.5%) | — / — |
| naive-bayes | 21 | ✅ 1233 ms (139 iters) | ✅ 1257 ms (136 iters) | ≈ +1.9% (±32.9%) | — / — |
| naive-bayes | 25 | 💥 0 ms (0 iters) | 💥 0 ms (0 iters) | — | — / — |
| reactors | 21 | ✅ 16947 ms (15 iters) | ✅ 15936 ms (15 iters) | ≈ -6% (±8.2%) | — / — |
| reactors | 25 | ✅ 18681 ms (15 iters) | ✅ 18731 ms (15 iters) | ≈ +0.3% (±5.3%) | — / — |
Internal counter details (ddprof)
ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
| Benchmark | JDK | Dropped rec | Dropped jvmti | Dropped trace | Skipped WC | AGCT fail | Unwind fail |
|---|---|---|---|---|---|---|---|
| akka-uct | 21 | ✅ / ✅ | ✅ / ✅ | 1 / 1 | 2008 / 2140 | ✅ / ✅ | ✅ / ✅ |
| akka-uct | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 1 | 2058 / 2262 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 21 | ✅ / ✅ | ✅ / ✅ | 3 / 3 | 8437 / 8783 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 3 | 8064 / 8228 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 21 | ✅ / ✅ | ✅ / ✅ | 6 / ✅ | 1275 / 1291 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / 2 | 1250 / 1261 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 21 | ✅ / ✅ | ✅ / ✅ | ✅ / 2 | 2876 / 3036 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 25 | ✅ / ✅ | ✅ / ✅ | 2 / ✅ | 2912 / 2869 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 4 | 3492 / 3491 | ✅ / ✅ | ✅ / ✅ |
| reactors | 21 | ✅ / ✅ | ✅ / ✅ | ✅ / ✅ | 1892 / 1633 | ✅ / ✅ | ✅ / ✅ |
| reactors | 25 | ✅ / ✅ | ✅ / ✅ | 2 / 2 | 1914 / 1937 | ✅ / ✅ | ✅ / ✅ |
3 tasks
Contributor
Benchmark Results (commit 2033006)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/125072159 Commit:
|
| Benchmark | JDK | Latest | Dev | Δ (dev vs latest) | Issues L/D |
|---|---|---|---|---|---|
| akka-uct | 21 | ✅ 10363 ms (21 iters) | ✅ 10147 ms (21 iters) | ≈ -2.1% (±11.6%) | — / — |
| akka-uct | 25 | ✅ 8966 ms (24 iters) | ✅ 8873 ms (24 iters) | ≈ -1% (±10.2%) | — / — |
| finagle-chirper | 21 | ✅ 6007 ms (33 iters) | ✅ 5986 ms (33 iters) | ≈ -0.3% (±26.1%) | |
| finagle-chirper | 25 | ✅ 5488 ms (36 iters) | ✅ 5433 ms (36 iters) | ≈ -1% (±24.3%) | |
| fj-kmeans | 21 | ✅ 2726 ms (68 iters) | ✅ 2760 ms (68 iters) | ≈ +1.2% (±2.6%) | — / — |
| fj-kmeans | 25 | ✅ 2848 ms (66 iters) | ✅ 2743 ms (69 iters) | 🟢 -3.7% | — / — |
| future-genetic | 21 | ✅ 2062 ms (90 iters) | ✅ 2047 ms (90 iters) | ≈ -0.7% (±2.6%) | — / — |
| future-genetic | 25 | ✅ 1994 ms (93 iters) | ✅ 2057 ms (90 iters) | 🔴 +3.2% | — / — |
| naive-bayes | 21 | ✅ 1269 ms (135 iters) | ✅ 1258 ms (136 iters) | ≈ -0.9% (±32.5%) | — / — |
| naive-bayes | 25 | ✅ 1012 ms (169 iters) | ✅ 1016 ms (168 iters) | ≈ +0.4% (±31.6%) | — / — |
| reactors | 21 | ✅ 16554 ms (15 iters) | ✅ 16630 ms (15 iters) | ≈ +0.5% (±8.5%) | — / — |
| reactors | 25 | ✅ 18407 ms (15 iters) | ✅ 18308 ms (15 iters) | ≈ -0.5% (±4.1%) | — / — |
Internal counter details (ddprof)
ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
| Benchmark | JDK | Dropped rec | Dropped jvmti | Dropped trace | Skipped WC | AGCT fail | Unwind fail |
|---|---|---|---|---|---|---|---|
| akka-uct | 21 | ✅ / ✅ | ✅ / ✅ | 1 / 2 | 2101 / 2026 | ✅ / ✅ | ✅ / ✅ |
| akka-uct | 25 | ✅ / ✅ | ✅ / ✅ | 4 / 3 | 2336 / 2365 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 21 | ✅ / ✅ | ✅ / ✅ | 4 / 3 | 8772 / 8497 | ✅ / ✅ | ✅ / ✅ |
| finagle-chirper | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 1 | 8397 / 8470 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 21 | ✅ / ✅ | ✅ / ✅ | 3 / 1 | 1260 / 1274 | ✅ / ✅ | ✅ / ✅ |
| fj-kmeans | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 3 | 1303 / 1307 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 21 | ✅ / ✅ | ✅ / ✅ | 1 / 2 | 2893 / 2882 | ✅ / ✅ | ✅ / ✅ |
| future-genetic | 25 | ✅ / ✅ | ✅ / ✅ | 1 / 2 | 2958 / 2912 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 21 | ✅ / ✅ | ✅ / ✅ | ✅ / 1 | 3540 / 3527 | ✅ / ✅ | ✅ / ✅ |
| naive-bayes | 25 | ✅ / ✅ | ✅ / ✅ | 5 / 6 | 3458 / 3485 | ✅ / ✅ | ✅ / ✅ |
| reactors | 21 | ✅ / ✅ | ✅ / ✅ | 2 / 1 | 1736 / 1754 | ✅ / ✅ | ✅ / ✅ |
| reactors | 25 | ✅ / ✅ | ✅ / ✅ | ✅ / ✅ | 1990 / 1872 | ✅ / ✅ | ✅ / ✅ |
GC-root reconstruction for live-heap allocation samples: track surviving objects, walk the reference graph back to a GC root, and emit the resulting chain via JFR. Core support spans the liveness tracker, object sampler, flight recorder, and JVMTI-facing safe-memory-access helpers used while walking potentially-stale references.
Gtest coverage for the liveness tracker, reference-chain BFS reconstruction, JFR round-trip encoding, and the line-number-table copy bounds guard (catches an off-by-one mutation at the MAX_LINE_NUMBER_TABLE_ENTRIES boundary).
In-process and external-process end-to-end coverage: JFR event parsing, a leaking-cache scenario that grows a live population over time, and test seams that isolate frontier/BFS state across shared-JVM test runs. Also fixes a stale-jmethodID stress test's javadoc to correctly attribute which SafeAccess guard rejects which access.
Wire reference-chain tests into the test workflow and fix quoting/allocator existence-check gaps in run-chaos-harness.sh surfaced by review.
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Benchmark Results (commit 02a0a93)Pipeline: https://gitlab.ddbuild.io/DataDog/apm-reliability/benchmarking-platform/-/pipelines/125255579 Commit: ✅ Within expected boundariesNo significant runtime deltas (all within run-to-run noise) and no internal-counter outliers. Runtime details (per benchmark × JDK)
Internal counter details (ddprof)ddprof internal counters, latest / dev (✅ = 0, · = unavailable):
|
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What does this PR do?:
Implements reference-chain reconstruction for live-heap samples that survive
past their allocation window (PROF-15341): a JVMTI
FollowReferences-basedBFS walk (
ReferenceChainTracker) tags reachable objects and recordsreferrer-type chains back toward a GC root, bridged to
LivenessTracker::selectLeakCandidates()'s population-slope leak detection.This revision also closes a structural gap found while adding end-to-end
coverage: a one-shot search could finish walking the whole reachable graph
before population-trend detection had accumulated enough GC epochs to flag a
candidate, making any object allocated after that point permanently
undiscoverable. Search restarts are now gated on an actual leak indication
existing (so a restarted walk is very likely to still find the object) plus
a
PainBudgetcooldown - a leaky bucket over cumulative safepoint timespent, not a fixed interval, so a cheap search can restart sooner than an
expensive one.
Motivation:
PROF-15341 - give live-heap samples that survive long enough to look
leak-shaped an actual referrer chain, not just "this object is still alive".
Additional Notes:
See
doc/architecture/LiveHeapReferenceChains.mdanddoc/architecture/LiveHeapReferenceChains-RemainingWorkPlan.mdfor the fulldesign history, open questions, and what's still provisional (per-pass
budget/hop-cap/TTL/frontier-cap/pain-budget-refill-rate defaults are all
round, unbenchmarked placeholders pending a future measurement pass).
How to test the change?:
./gradlew :ddprof-lib:gtestDebug- full native unit suite, including newPainBudgetTest/SearchRestartTestcoverage for the restart gate../gradlew :ddprof-test:testDebug --tests "*ExternalProcessReferenceChainTest*"-genuinely separate-process end-to-end test: runs a real leaking-cache Java
app in a child JVM and asserts the reconstructed chain's leaf class.
./gradlew :ddprof-test:testDebug --tests "*ReferenceChainTrackingTest*"-in-process coverage for the BFS engine, target-selection bridging, and
abandonment reporting.
For Datadog employees:
credentials of any kind, I've requested a security review (run the
dd:platform-security-reviewskill, or file a request via the PSEC review form).
bewairealso runs automatically on every PR.Unsure? Have a question? Request a review!
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