Reduce timing overhead of EXPLAIN ANALYZE using rdtsc

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ID 5622
Title Reduce timing overhead of EXPLAIN ANALYZE using rdtsc
CI (CFBot) Summary
Stats (from CFBot) Patch version: v12, Patch count: 3, First patch: +8−4, All patches: +414−43
Topic Performance
Tags
Created 2025-03-01 07:48:09
Last modified 2025-10-19 18:24:33 (2 weeks ago)
Latest email 2025-10-22 13:32:03 (1 week ago)
Status
PG19-3 (2025-11-01 – 2025-11-30): Needs review
PG19-2 (2025-09-01 – 2025-09-30): Moved to different CF
2025-03 (2025-03-01 – 2025-04-08): Moved to different CF
Target version
Authors Andres Freund (andresfreund), Lukas Fittl (lfittl), David Geier (geidav)
Reviewers Become reviewer
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Reduce timing overhead of EXPLAIN ANALYZE using rdtsc?
First at 2020-06-12 23:28:10 by Andres Freund <andres at anarazel.de>
Latest at 2025-10-22 13:32:03 by Andres Freund <andres at anarazel.de>
Latest attachment (v12-0001-cpuidex-check-Support-detecting-newer-GCC-versio.patch) at 2025-10-19 18:16:20 from Álvaro Herrera <alvherre at kurilemu.de>
    Attachment (v12-0001-cpuidex-check-Support-detecting-newer-GCC-versio.patch) at 2025-10-19 18:16:20 from Álvaro Herrera <alvherre at kurilemu.de> (Patch: Yes)
    Attachment (v11-0003-pg_test_timing-Add-fast-flag-to-test-fast-timing.patch) at 2025-07-27 19:50:54 from Lukas Fittl <lukas at fittl.com> (Patch: Yes)
    Attachment (v10-0001-instr_time-Add-INSTR_TIME_SET_SECONDS-INSTR_TIME.patch) at 2025-03-01 07:45:58 from Lukas Fittl <lukas at fittl.com> (Patch: Yes)
    Attachment (v9-0001-instr_time-Add-INSTR_TIME_SET_SECONDS-INSTR_TIME_.patch) at 2023-02-20 10:36:32 from David Geier <geidav.pg at gmail.com> (Patch: Yes)
    Attachment (v8-0001-instr_time-Add-INSTR_TIME_SET_SECONDS-INSTR_TIME_.patch) at 2023-02-14 11:11:01 from David Geier <geidav.pg at gmail.com> (Patch: Yes)
    Attachment (v7-0001-instr_time-Add-INSTR_TIME_SET_SECONDS-INSTR_TIME_.patch) at 2023-01-24 13:30:34 from David Geier <geidav.pg at gmail.com> (Patch: Yes)
    Attachment (v9-0001-instr_time-Add-INSTR_TIME_SET_SECONDS-INSTR_TIME_.patch) at 2023-01-21 05:31:57 from Andres Freund <andres at anarazel.de> (Patch: Yes)
    Attachment (v8-0001-Zero-initialize-instr_time-uses-causing-compiler-.patch) at 2023-01-21 00:40:32 from Andres Freund <andres at anarazel.de> (Patch: Yes)
    Attachment (v7-0001-Zero-initialize-instr_time-uses-causing-compiler-.patch) at 2023-01-17 16:47:58 from Andres Freund <andres at anarazel.de> (Patch: Yes)
    Attachment (0001-Change-instr_time-to-just-store-nanoseconds-v6.patch) at 2023-01-04 12:02:05 from David Geier <geidav.pg at gmail.com> (Patch: Yes)
    Attachment (0001-Change-instr_time-to-just-store-nanoseconds-v5.patch) at 2023-01-03 08:38:20 from David Geier <geidav.pg at gmail.com> (Patch: Yes)
    Attachment (0001-Change-instr_time-to-just-store-nanoseconds-v4.patch) at 2023-01-02 13:28:20 from David Geier <geidav.pg at gmail.com> (Patch: Yes)
    Attachment (0001-WIP-Change-instr_time-to-just-store-nanoseconds-v3.patch) at 2022-11-19 20:06:23 from David Geier <geidav.pg at gmail.com> (Patch: Yes)
    Attachment (v2-0002-WIP-Use-cpu-reference-cycles-via-rdtsc-to-measure.patch) at 2022-07-01 08:23:01 from Lukas Fittl <lukas at fittl.com> (Patch: Yes)
    Attachment (v1-0001-WIP-Change-instr_time-to-just-store-nanoseconds-t.patch) at 2020-06-12 23:28:10 from Andres Freund <andres at anarazel.de> (Patch: Yes)
History
When Who What
2025-10-19 18:34:28 CFbot Patch does not need rebase anymore
2025-10-19 18:24:33 Álvaro Herrera (alvherre) Moved from CF PG19-2 to CF PG19-3
2025-08-01 09:33:21 CFbot Patch needs rebase
2025-07-28 20:22:27 CFbot Patch does not need rebase anymore
2025-07-27 19:52:27 Lukas Fittl (lfittl) New status: Needs review
2025-07-27 19:51:45 Lukas Fittl (lfittl) Moved from CF 2025-03 to CF PG19-2
2025-03-11 04:14:43 vigneshwaran C (vignesh.postgres) New status: Waiting on Author
2025-03-06 13:19:42 CFbot Patch needs rebase
2025-03-01 07:48:36 Lukas Fittl (lfittl) Changed authors to Andres Freund (andresfreund), Lukas Fittl (lfittl), David Geier (geidav)
2025-03-01 07:48:10 Lukas Fittl (lfittl) Attached mail thread 20200612232810.f46nbqkdhbutzqdg@alap3.anarazel.de
2025-03-01 07:48:09 Lukas Fittl (lfittl) Created patch record
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