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perf(flow): use batch mode for flow #4599

Merged
merged 29 commits into from
Sep 11, 2024
Merged

perf(flow): use batch mode for flow #4599

merged 29 commits into from
Sep 11, 2024

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discord9
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@discord9 discord9 commented Aug 21, 2024 •
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I hereby agree to the terms of the GreptimeDB CLA.

Refer to a related PR or issue link (optional)

What's changed and what's your intention?

most of adds/deletes are just refactor and tests, core changes are only about 300 lines of code

  • refactor reduce.rs's reduce operator to be more efficient(only about 300 lines of code)
  • most other code changes are change from using row mode api to batch mode api or refactor
  • also change most debug log in flow to trace
  • add more flow usecase test

optimize flow to reduce cpu usage from 100% to 2.6%, and hardly any impact on tsbs write

before(100% cpu) flamegraph:
图片
after(1~2% cpu) flamegraph:
图片

Checklist

  • I have written the necessary rustdoc comments.
  • I have added the necessary unit tests and integration tests.
  • This PR requires documentation updates.

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@discord9 discord9 changed the title perf(flow): use batch mode to reduce cpu usage by two order of magnitude perf(flow): use batch mode to reduce flow's cpu usage by two order of magnitude Aug 21, 2024
@github-actions github-actions bot added the docs-not-required This change does not impact docs. label Aug 21, 2024
@discord9 discord9 force-pushed the flow_use_batch_mode branch 2 times, most recently from 48063c0 to 9ef585c Compare August 23, 2024 11:23
@discord9 discord9 changed the title perf(flow): use batch mode to reduce flow's cpu usage by two order of magnitude perf(flow): use batch mode for flow Aug 26, 2024
@discord9 discord9 force-pushed the flow_use_batch_mode branch 2 times, most recently from 403c12f to b4678e2 Compare August 30, 2024 03:08
@discord9 discord9 marked this pull request as ready for review August 30, 2024 03:17
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codecov bot commented Aug 30, 2024 •
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Codecov Report

Attention: Patch coverage is 64.37824% with 275 lines in your changes missing coverage. Please review.

Project coverage is 84.51%. Comparing base (208afe4) to head (b055f10).
Report is 12 commits behind head on main.

Additional details and impacted files 
@@            Coverage Diff             @@
##             main    #4599      +/-   ##
==========================================
- Coverage   84.81%   84.51%   -0.30%     
==========================================
  Files        1109     1114       +5     
  Lines      200016   200894     +878     
==========================================
+ Hits       169637   169787     +150     
- Misses      30379    31107     +728

zhongzc
zhongzc approved these changes Sep 3, 2024
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zhongzc
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@discord9 discord9 force-pushed the flow_use_batch_mode branch from 140781b to 446314e Compare September 3, 2024 09:17
@discord9 discord9 requested a review from a team as a code owner September 3, 2024 12:00
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discord9 commented Sep 4, 2024

added some sqlness testcase for flow

@killme2008 killme2008 requested a review from waynexia September 9, 2024 03:42
killme2008
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@discord9 discord9 force-pushed the flow_use_batch_mode branch from 445d854 to 1d9a0b8 Compare September 9, 2024 06:25
@nicecui nicecui mentioned this pull request Sep 10, 2024
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fengjiachun
fengjiachun approved these changes Sep 10, 2024
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Rest LGTM

src/flow/src/compute/render/reduce.rs Outdated Show resolved Hide resolved
@discord9 discord9 enabled auto-merge September 11, 2024 03:14
@discord9 discord9 added this pull request to the merge queue Sep 11, 2024
Merged via the queue into GreptimeTeam:main with commit a3d567f Sep 11, 2024
32 checks passed
@discord9 discord9 deleted the flow_use_batch_mode branch September 11, 2024 03:47
CookiePieWw pushed a commit to CookiePieWw/greptimedb that referenced this pull request Sep 17, 2024
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perf(flow): use batch mode for flow (GreptimeTeam#4599)
7d8d84c 
* generic bundle trait

* feat: impl get/let

* fix: drop batch

* test: tumble batch

* feat: use batch eval flow

* fix: div use arrow::div not mul

* perf: not append batch

* perf: use bool mask for reduce

* perf: tiny opt

* perf: refactor slow path

* feat: opt if then

* fix: WIP

* perf: if then

* chore: use trace instead

* fix: reduce missing non-first batch

* perf: flow if then using interleave

* docs: add TODO

* perf: remove unnecessary eq

* chore: remove unused import

* fix: run_available no longer loop forever

* feat: blocking on high input buf

* chore: increase threhold

* chore: after rebase

* chore: per review

* chore: per review

* fix: allow empty values in reduce&test

* tests: more flow doc example tests

* chore: per review

* chore: per review
@discord9 discord9 mentioned this pull request Oct 23, 2024
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@zhongzc zhongzc zhongzc approved these changes

@killme2008 killme2008 killme2008 left review comments

@fengjiachun fengjiachun fengjiachun approved these changes

@waynexia waynexia Awaiting requested review from waynexia waynexia is a code owner

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