{ "evidence": "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase", "source_commit": "c0bc1557bfb12eeb6652644e69f5b7a5880f8d17", "diagnostic_only": true, "publishable": false, "publication_rejection": "noncanonical receive-counter diagnostic in /tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/cpp_socketxtreme_1.log:2", "numeric_adapter": "Only expected tool suffix changes to _sx_count, scoped to C++ SX Single; no evidence edits or canonical permission.", "completion": { "finished_utc": "2026-09-10T14:44:09Z", "source_commit": "c0bc1557bfb12eeb6652644e69f5b7a5880f8d17", "source_and_runtime_frozen": true, "remaining_fix_processes": [], "error": null, "diagnostic_only": true, "publishable": false }, "raw_delivery": { "runs": 3, "samples_per_session_per_run": 20000, "complete_processes": 1, "measured_deficit": 0, "measured_shed": 0, "raw_drops": 0, "raw_clamps": 0, "response_equals_service_plus_scheduler": true, "stale_replies_by_process": [ null ] }, "numeric_validation": { "full_measured_delivery": true, "measured_sheds": 0, "measured_deficits": 0, "exact_marker_all_clients": true, "service_and_response_four_quantiles": true, "scheduler_p99": true, "logged_session_run_means": true, "logged_aggregate_maxima": true, "final_raw_and_text_hashes_revalidated": true }, "exact_quantiles_us": { "p50_us": "6.155", "p99_us": "7.805", "p999_us": "11.873", "worst_us": "29.579", "resp_p50_us": "6.518", "resp_p99_us": "8.210", "resp_p999_us": "12.238", "resp_worst_us": "30.476", "scheduler_delay_p99_us": "0.530" }, "timeline_raw_matches": 492, "timing_headers": [ { "run": 1, "phase": "warmup", "canonical": "false", "samples": 20000, "complete": 20000, "invalid": 0, "minor_fault_delta": 15, "major_fault_delta": 0, "long_step_drops": 0 }, { "run": 1, "phase": "measured", "canonical": "false", "samples": 20000, "complete": 20000, "invalid": 0, "minor_fault_delta": 0, "major_fault_delta": 0, "long_step_drops": 0 }, { "run": 2, "phase": "warmup", "canonical": "false", "samples": 20000, "complete": 20000, "invalid": 0, "minor_fault_delta": 0, "major_fault_delta": 0, "long_step_drops": 0 }, { "run": 2, "phase": "measured", "canonical": "false", "samples": 20000, "complete": 20000, "invalid": 0, "minor_fault_delta": 0, "major_fault_delta": 0, "long_step_drops": 0 }, { "run": 3, "phase": "warmup", "canonical": "false", "samples": 20000, "complete": 20000, "invalid": 0, "minor_fault_delta": 0, "major_fault_delta": 0, "long_step_drops": 0 }, { "run": 3, "phase": "measured", "canonical": "false", "samples": 20000, "complete": 20000, "invalid": 0, "minor_fault_delta": 0, "major_fault_delta": 0, "long_step_drops": 0 } ], "live_affinity": { "status": "pass", "samples": { "PASS": 5, "INCONCLUSIVE": 0, "VIOLATION": 0, "INVALID": 0 }, "log": "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/live-pinning-watch.log", "sha256": "b6a3a06d031c42a8591b8aee58ed160186f502fa704107665d5da62386cf7e63", "scope": "discrete global FIX-process samples; not continuous or per-phase coverage", "observer_cpus": [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 ] }, "diagnostic_startup_affinity": { "result": "placement verified: server[10] client[15] vma[14:2/2] disjoint", "expected_invocations": [ { "role": "server", "expected_tool": "cpp_fix_sx" }, { "role": "client", "expected_tool": "cpp_fix_sx_count" } ], "limitation": "Read-only expected-tool adapter for cpp_fix_sx_count client only; ordinary identity audit rejection retained." }, "runs": [ { "run": 1, "tail": { "count": 157, "medians_ns": { "service_ns": 11622, "send_path_ns": 704, "reply_step_ns": 6536, "poll_api_ns": 2356, "free_api_ns": 92, "remaining_step_ns": 710, "post_send_to_reply_step_ns": 8525, "post_step_to_completion_ns": 49 }, "modulo256": [ [ 210, 49 ], [ 213, 49 ], [ 206, 25 ], [ 217, 19 ], [ 209, 9 ], [ 215, 4 ], [ 0, 1 ], [ 1, 1 ] ] }, "long_positive_reply": { "count": 79, "medians_ns": { "service_ns": 11781, "send_path_ns": 674, "reply_step_ns": 6988, "poll_api_ns": 6120, "free_api_ns": 107, "remaining_step_ns": 738, "post_send_to_reply_step_ns": 4064, "post_step_to_completion_ns": 51 }, "modulo256": [ [ 210, 49 ], [ 206, 25 ], [ 215, 4 ], [ 0, 1 ] ] }, "other_tail": { "count": 78, "medians_ns": { "service_ns": 11358, "send_path_ns": 728.5, "reply_step_ns": 1365.5, "poll_api_ns": 629, "free_api_ns": 74, "remaining_step_ns": 654, "post_send_to_reply_step_ns": 9162, "post_step_to_completion_ns": 29 }, "modulo256": [ [ 213, 49 ], [ 217, 19 ], [ 209, 9 ], [ 1, 1 ] ] }, "slow_send": { "count": 1, "medians_ns": { "service_ns": 29196, "send_path_ns": 11164, "reply_step_ns": 7467, "poll_api_ns": 2356, "free_api_ns": 536, "remaining_step_ns": 4575, "post_send_to_reply_step_ns": 10475, "post_step_to_completion_ns": 90 }, "modulo256": [ [ 0, 1 ] ] } }, { "run": 2, "tail": { "count": 158, "medians_ns": { "service_ns": 11483.5, "send_path_ns": 685.5, "reply_step_ns": 4091, "poll_api_ns": 1716.5, "free_api_ns": 92, "remaining_step_ns": 707, "post_send_to_reply_step_ns": 8723, "post_step_to_completion_ns": 49 }, "modulo256": [ [ 138, 49 ], [ 133, 45 ], [ 130, 33 ], [ 135, 18 ], [ 142, 11 ], [ 0, 1 ], [ 1, 1 ] ] }, "long_positive_reply": { "count": 79, "medians_ns": { "service_ns": 11513, "send_path_ns": 691, "reply_step_ns": 6807, "poll_api_ns": 5942, "free_api_ns": 107, "remaining_step_ns": 739, "post_send_to_reply_step_ns": 4052, "post_step_to_completion_ns": 51 }, "modulo256": [ [ 133, 45 ], [ 130, 33 ], [ 0, 1 ] ] }, "other_tail": { "count": 79, "medians_ns": { "service_ns": 11449, "send_path_ns": 682, "reply_step_ns": 1315, "poll_api_ns": 579, "free_api_ns": 74, "remaining_step_ns": 659, "post_send_to_reply_step_ns": 9445, "post_step_to_completion_ns": 29 }, "modulo256": [ [ 138, 49 ], [ 135, 18 ], [ 142, 11 ], [ 1, 1 ] ] }, "slow_send": { "count": 1, "medians_ns": { "service_ns": 30627, "send_path_ns": 12715, "reply_step_ns": 8762, "poll_api_ns": 2490, "free_api_ns": 492, "remaining_step_ns": 5780, "post_send_to_reply_step_ns": 9066, "post_step_to_completion_ns": 84 }, "modulo256": [ [ 0, 1 ] ] } }, { "run": 3, "tail": { "count": 159, "medians_ns": { "service_ns": 11412, "send_path_ns": 817, "reply_step_ns": 2256, "poll_api_ns": 1390, "free_api_ns": 92, "remaining_step_ns": 700, "post_send_to_reply_step_ns": 7752, "post_step_to_completion_ns": 49 }, "modulo256": [ [ 61, 49 ], [ 55, 41 ], [ 59, 37 ], [ 57, 25 ], [ 66, 4 ], [ 0, 1 ], [ 1, 1 ], [ 30, 1 ] ] }, "long_positive_reply": { "count": 79, "medians_ns": { "service_ns": 11540, "send_path_ns": 791, "reply_step_ns": 6759, "poll_api_ns": 5913, "free_api_ns": 107, "remaining_step_ns": 736, "post_send_to_reply_step_ns": 4057, "post_step_to_completion_ns": 51 }, "modulo256": [ [ 55, 41 ], [ 59, 37 ], [ 0, 1 ] ] }, "other_tail": { "count": 80, "medians_ns": { "service_ns": 11273.5, "send_path_ns": 1543, "reply_step_ns": 1336, "poll_api_ns": 596, "free_api_ns": 73, "remaining_step_ns": 657, "post_send_to_reply_step_ns": 8616, "post_step_to_completion_ns": 29 }, "modulo256": [ [ 61, 49 ], [ 57, 25 ], [ 66, 4 ], [ 1, 1 ], [ 30, 1 ] ] }, "slow_send": { "count": 1, "medians_ns": { "service_ns": 28913, "send_path_ns": 11039, "reply_step_ns": 8238, "poll_api_ns": 3576, "free_api_ns": 446, "remaining_step_ns": 4216, "post_send_to_reply_step_ns": 9563, "post_step_to_completion_ns": 73 }, "modulo256": [ [ 0, 1 ] ] } } ], "raw_binding": { "path": "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/raw/single_cpp_socketxtreme_1.hftbrw", "sha256": "6e0abd5854574468c9d1e22cddfdb02c6afb05891ac8e300f4eeb265b74d67aa", "bytes": 720763, "series": 9 }, "evidence_hashes": { "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/.libhft-bench-output": "e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/rows.csv": "d3c0a9d496b5fa8a0859890f1e47bc2494b3eac3a0479904a8baca53f8a42978", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/transcript.log": "96b391c26f031cfe067dd9242cb2c04ebcf2eb686953092059be331bddd8c2d0", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/recipe.txt": "eb24fee1fc60c8c02f370ca8931717b3f28ee4e8b846a84865caf9895c84a55e", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/cpp_socketxtreme_1.log": "820d91371400a366274f7a7c26d497511496dd43424ef1cdbd96474a74e40af8", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/raw/single_cpp_socketxtreme_1.hftbrw": "6e0abd5854574468c9d1e22cddfdb02c6afb05891ac8e300f4eeb265b74d67aa", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/ready.v4.1.warmup.1": "cbfc23ea6ccf37baecd67d1b77c7a4441fc6b1ee05d1a9e36bee3eb97ecd4be7", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/go.v4.1.warmup": "23a1e91cd0b385020fe0cf46f49b480e9a9751796a9cbc61be9126a73761c5fa", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/ready.v4.1.measured.1": "8665d2ada26cec368cb97fb39c2908b604f353319f97e23e97db7a2a7628b64a", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/go.v4.1.measured": "441bf6548f54c672075c1a43b9f0fb500540f202ce22c5d09ae01071f4bcbcbd", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/ready.v4.2.warmup.1": "2a8016f1e89a10114cfa72f9bb028e83d0a8451a321dc8d4ab2059ddb10d0f4f", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/go.v4.2.warmup": "c6dd4d5599acd3f5c6988411325e038014733471ff6461354e73d48e3438b644", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/ready.v4.2.measured.1": "a32734c293d179ad8754d0b5e3663983e0c263f0d5a186f29a7d9178a862320e", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/go.v4.2.measured": "e66e0267a9491b768dfcd88ba98c53daf12c1b26025002361035437e33a4bcde", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/ready.v4.3.warmup.1": "cf9798c9341c08c2cffed5ccc153c88816412a4c670b59c62f10538c531946ec", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/go.v4.3.warmup": "4c86846c16ef46c4991022d9c0a6c441a5e9a5aa1d10c849812b48f2944912cf", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/ready.v4.3.measured.1": "1288fa038e6e44edbde0087fced7588da1173c74b15c4ae40ca8f03d6bb3413c", "/tmp/libhft-cpp-sx-api-scan-20260910-NNNrjH/client-phase/run/open-schedule-v4/cpp_socketxtreme/go.v4.3.measured": "f6875c32376b92ea4e013440c642a3ceb5d4b0f0385b0721075ad0a234c12740" }, "analysis_sha256": "67bae60a3903310f729150837b033818bcd655d1b7fc1b2ac72131fa5eba38fc", "build": { "finished_utc": "2026-09-10T14:42:24Z", "exit_code": 0, "source_commit": "c0bc1557bfb12eeb6652644e69f5b7a5880f8d17", "source_unchanged": true, "runtime_unchanged": true, "compiler_unchanged": true, "artifact_sha256": "03c3bde0e539a7c258d6475861821cdeb6236e38a444243f175c0402e5bc5f6a", "remaining_fix_processes": [] }, "staging": { "source_commit": "c0bc1557bfb12eeb6652644e69f5b7a5880f8d17", "observed_utc": "2026-09-10T14:43:06Z", "hashes": { "bench-run": "8d7d9fff6803be2bd94d1a176ad3e68ef30554f1e3946a6acc18869a20952a0e", "bench_roundtrip": "e75c56c70211c21bbed4a8d12abd5d763e4eb9a279f3a86f7dae99fc9aa244dd", "bench_roundtrip_vma_sx": "05b13269b83d2193665995294f8098a110f238ba5c8958ffe8ed922cf02e4275", "bench_roundtrip_vma_sx_count": "03c3bde0e539a7c258d6475861821cdeb6236e38a444243f175c0402e5bc5f6a", "bench_roundtrip_zf": "c9d036e67cad97f972052f81e23c656796027259f03aba4b01313a9f27da8c09", "bench_roundtrip_zf_count": "cddedf51b2168d3a17c851cf933a6a6b9c9bd1f0d5bf346393b75ffb84c24b9c", "dotnet-fix/libhft-net/Atrekes.Libhft.HftBench.dll": "7546a5462d54dc2dff430df537f336b7100349cbdbfdca19115505be67912de2", "dotnet-fix/libhft-net/Atrekes.Libhft.HftBench.pdb": "c0507fd9085a39ad5c6d2df0ad0b293749d1825738293449c935f0971a60c5ed", "dotnet-fix/libhft-net/Atrekes.Libhft.dll": "ec2e8c24b9bbac197246f031fd43a41312740f6f34f1e083f1d4b60eeb374dc2", "dotnet-fix/libhft-net/Atrekes.Libhft.pdb": "af20500180da6321f91186d7a2013c3b7c97817a4cfd0a1ec561270b5d350d0e", "dotnet-fix/libhft-net/LibhftNet.Bench": "cd50375caa0b41fd9d3cbbfee99855cf2331a461e4de520bcbd61a2828aef7b3", "dotnet-fix/libhft-net/LibhftNet.Bench.deps.json": "07b348acdfdc69ebe6c9ae1820cdb3a0f6fb5f619a2f029390c91e2007fb7d45", "dotnet-fix/libhft-net/LibhftNet.Bench.dll": "9245e26b0c7ccc5d147bb741ec8b554394a53d03009791c04b10c07a7783ec44", "dotnet-fix/libhft-net/LibhftNet.Bench.pdb": "bb8dd7f5c38e55cd5986ddf723efafff1f38972f769166f97595721b293a1c59", "dotnet-fix/libhft-net/LibhftNet.Bench.runtimeconfig.json": "1d7d35a69670fbf5a6aa5767b3e57a1fc85b61917bbc2174161e64c68daff08a", "dotnet-fix/native/Atrekes.Libhft.HftBench.dll": "d4cdb4dfcc8fe6f4f718d6bf2790cd6ce29ee49e58232c01508a185c01190582", "dotnet-fix/native/Atrekes.Libhft.HftBench.pdb": "fed0492461301a1ae4b47d10d88563dabdd335eb5b64c4032742b086f86b9362", "dotnet-fix/native/Atrekes.Libhft.dll": "f2f768cdd3c77a8f859e4552a55b17a771ec31d9209de13c60c8143f605f13e7", "dotnet-fix/native/Atrekes.Libhft.pdb": "cda60957f9e7d615b44231a21105caa179b1dda14ce6ee4ad97db7e55a7d06cf", "dotnet-fix/native/ProviderSmoke": "3da418d3ec0c9728a009ed7cef68221050aaca2ce45b1af3889876d710e83a2c", "dotnet-fix/native/ProviderSmoke.deps.json": "a4eb1e4abcf63973616a6f250ec81b79ad48fe60ba804529c61c51b73e45b0cd", "dotnet-fix/native/ProviderSmoke.dll": "223524b3548d157db282365be5bd65823ff736c69bce6477e1d0f0f3d36c7d71", "dotnet-fix/native/ProviderSmoke.pdb": "0441deba8ce951f559096de9345f49ce436c778a4eebe1495a696e27b3ddfdde", "dotnet-fix/native/ProviderSmoke.runtimeconfig.json": "2ca4d37d6c91d37e8266ecee791d5ca3bbf1dc665fcda2c4042707184c3b8524", "dotnet-fix/native/libhftnet.so": "77a6f181115b92075a3ee02a7e7dbca496150dcf03a4278cd6b81cbaefc0abd9", "dotnet-fix/native/libhftnet_kernel.so": "77a6f181115b92075a3ee02a7e7dbca496150dcf03a4278cd6b81cbaefc0abd9", "dotnet-fix/native/libhftnet_socketxtreme.so": "77a6f181115b92075a3ee02a7e7dbca496150dcf03a4278cd6b81cbaefc0abd9", "dotnet-fix/native/libhftnet_tcpdirect.so": "77a6f181115b92075a3ee02a7e7dbca496150dcf03a4278cd6b81cbaefc0abd9", "java-fix/libhftjava.so": "8651664da26fe5173f8550b71cf0f08f5e3094087327da5ecc80c7a6e6036833", "java-fix/libs/HdrHistogram-2.2.2.jar": "22d1d4316c4ec13a68b559e98c8256d69071593731da96136640f864fa14fad8", "java-fix/libs/commons-math3-3.2.jar": "6268a9a0ea3e769fc493a21446664c0ef668e48c93d126791f6f3f757978fee2", "java-fix/libs/fixbench.jar": "36c6d606e17c5e7d8dc1e569e54e462070ba6383ce4c66f5e928e28460de6e5e", "java-fix/libs/hft-bench-0.1.0-SNAPSHOT.jar": "9f6e6bd2ebdfd4e99b38b3ab74f36754dad324689af9f1fcc6c53cc6bbb7fce3", "java-fix/libs/jmh-core-1.23.jar": "5b202159b21555045affccdde23c57005b9efceaea32ca6e4406d4fe5811e743", "java-fix/libs/joda-time-2.9.1.jar": "c508f78ed9ac388cfccad7974ee282175f05ae25b68f0cc6eef21f8aeb3ceeaa", "java-fix/libs/jopt-simple-4.6.jar": "3fcfbe3203c2ea521bf7640484fd35d6303186ea2e08e72f032d640ca067ffda", "java-fix/libs/libhft-java-0.1.0-SNAPSHOT-quickfixj-adapter.jar": "9f12f512ac427673600f26ffe759062141e5d000d1e826a9f16fbcc16e58a091", "java-fix/libs/libhft-java-0.1.0-SNAPSHOT.jar": "75ee39570e3c17e77040df7e5cdf5f5385284ad99a1855b8a0e074bc8c7a1152", "java-fix/libs/libhftjava_kernel.so": "8651664da26fe5173f8550b71cf0f08f5e3094087327da5ecc80c7a6e6036833", "java-fix/libs/libhftjava_socketxtreme.so": "8651664da26fe5173f8550b71cf0f08f5e3094087327da5ecc80c7a6e6036833", "java-fix/libs/libhftjava_tcpdirect.so": "8651664da26fe5173f8550b71cf0f08f5e3094087327da5ecc80c7a6e6036833", "java-fix/libs/mina-core-2.2.3.jar": "974518e8388a973682323388f35b9a3ccf567d958addde837de1e69b74602952", "java-fix/libs/philadelphia-core-2.0.0.jar": "396136037b0f41e635e3aea233c3f31f4a388318b445f4afe1609b9a6d28a7b7", "java-fix/libs/philadelphia-fix44-2.0.0.jar": "8ff229c5791f1924fa01f26e046ee7153024789e78faa120b520cd593a100780", "java-fix/libs/quickfixj-core-2.3.1.jar": "d063713127ae8fe86989065d183d1b0db43b5aa0d41c377770020681ea3a4593", "java-fix/libs/quickfixj-messages-fix44-2.3.1.jar": "235bd33802e2cad6a573a88f964c9601b7143cfcd024217fb3b4e1d154b9f14e", "java-fix/libs/slf4j-api-1.7.14.jar": "b030a29e088dea60b07c7299d25f43cbd120502e10dcae3f382435ecd5de5ddd", "java-fix/libs/slf4j-simple-1.7.14.jar": "0f8932ce5b92fb71a424283c7b7bfa29e7aaaf545272aacc85b02c2b0cf34733", "libhftnet.so": "77a6f181115b92075a3ee02a7e7dbca496150dcf03a4278cd6b81cbaefc0abd9", "load-bench-capabilities.tsv": "0aac973351ceb5830f2ca7699cdb687777144ee01939c7859e24f289099f3c68", "load-bench-machine-scan.conf": "a7d771328e7c69df1e4966eddccd8e24c69a4d9249df12867e746034c3ee19ec", "load-bench-standards.conf": "ad14e811a81f6af9ade11464c9f3d005221028417ea0592c6fca3f4bb108abf3" }, "changed_artifacts": [ "bench_roundtrip_vma_sx_count" ], "unchanged_artifacts": 51, "root_owned_paths_verified": true, "diagnostic_only": true, "publishable": false, "wrapper_sha256": "fea983d0edd45fcc80aedfc1569efb146c767c8e9fa924d9c0f72b05a226bc7b", "remaining_fix_processes": [] }, "finding": "Recurring slow positive-receive steps are dominated by socketxtreme_poll (median 5913-6120ns across runs), not held-packet release (107ns) or remaining receive-step work (736-739ns). A separate periodic post-send waiting tail persists. All 492 selected measured timelines match raw samples. No canonical repair is established.", "limitations": [ "Instrumented diagnostic is not canonical and does not replace the retained partial row.", "An interval inside a vendor API does not prove which internal function, lock, or external interruption caused the delay.", "Measured client page-fault deltas are zero; no peer-side page-fault attribution is made.", "Counter-tool identity adapters are read-only and explicit; ordinary audit rejections remain retained.", "System/vendor VMA remains unchanged; deeper private vendor instrumentation needs separate approval." ] }