worker: add ability to take heap snapshot from parent thread #31569

addaleax · 2020-01-29T16:46:35Z

@nodejs/workers

Checklist

make -j4 test (UNIX), or vcbuild test (Windows) passes
tests and/or benchmarks are included
documentation is changed or added
commit message follows commit guidelines

richardlau · 2020-01-29T17:17:05Z

Add a test for when the worker is no longer running?

addaleax · 2020-01-29T17:30:55Z

@richardlau Thanks, yes – I had missed that I hadn’t fully implemented that part yet 👍

miss-click sorry about that

doc/api/errors.md

doc/api/worker_threads.md

lib/internal/worker.js

lib/internal/heap_utils.js

lib/internal/errors.js

nodejs-github-bot · 2020-01-30T16:23:35Z

CI: https://ci.nodejs.org/job/node-test-pull-request/28783/

nodejs-github-bot · 2020-01-31T21:15:58Z

CI: https://ci.nodejs.org/job/node-test-pull-request/28821/

nodejs-github-bot · 2020-02-01T02:45:59Z

CI: https://ci.nodejs.org/job/node-test-pull-request/28827/

Trott · 2020-02-01T03:11:20Z

Needs a rebase. Also is the failure of test.parallel/test-bootstrap-modules CI when run with tools/test.py --worker related to this change? I haven't seen it before and we got it three times in a row here.

richardlau · 2020-02-01T04:08:31Z

Needs a rebase. Also is the failure of test.parallel/test-bootstrap-modules CI when run with tools/test.py --worker related to this change? I haven't seen it before and we got it three times in a row here.

Yes, it is related:

21:56:18 not ok 112 parallel/test-bootstrap-modules
21:56:18   ---
21:56:18   duration_ms: 0.278
21:56:18   severity: fail
21:56:18   exitcode: 1
21:56:18   stack: |-
21:56:18     
21:56:18     events.js:298
21:56:18           throw er; // Unhandled 'error' event
21:56:18           ^
21:56:18     AssertionError [ERR_ASSERTION]: These modules were unexpectedly loaded:
21:56:18       Internal Binding stream_wrap,
21:56:18       Internal Binding uv,
21:56:18       NativeModule internal/heap_utils,
21:56:18       NativeModule internal/stream_base_commons
21:56:18     
21:56:18         at Object.<anonymous> (/home/iojs/build/workspace/node-test-commit-custom-suites-freestyle/test/parallel/test-bootstrap-modules.js:131:8)
21:56:18         at Module._compile (internal/modules/cjs/loader.js:1208:30)
21:56:18         at Object.Module._extensions..js (internal/modules/cjs/loader.js:1228:10)
...

test-bootstrap-modules is there to alert when extra modules are being loaded by the bootstrap process, which they are for workers in this PR, which has added internal/heap_utils and requires it from internal/worker. internal/heap_utils requires internal/stream_base_commons and that requires stream_wrap and uv (

node/lib/internal/stream_base_commons.js

Lines 10 to 18 in cb21011

    
           const { 
        
             WriteWrap, 
        
             kReadBytesOrError, 
        
             kArrayBufferOffset, 
        
             kBytesWritten, 
        
             kLastWriteWasAsync, 
        
             streamBaseState 
        
           } = internalBinding('stream_wrap'); 
        
           const { UV_EOF } = internalBinding('uv');

).

If we're okay adding these extra modules to the bootstrapping of worker threads (it's probably okay -- the whole point of the test is to make us make a considered decision) then they should be added to the list of modules expected to be loaded for workers in the test:

node/test/parallel/test-bootstrap-modules.js

Lines 86 to 107 in ab9e894

    
           if (!common.isMainThread) { 
        
             expectedModules.add('Internal Binding messaging'); 
        
             expectedModules.add('Internal Binding symbols'); 
        
             expectedModules.add('Internal Binding worker'); 
        
             expectedModules.add('NativeModule _stream_duplex'); 
        
             expectedModules.add('NativeModule _stream_passthrough'); 
        
             expectedModules.add('NativeModule _stream_readable'); 
        
             expectedModules.add('NativeModule _stream_transform'); 
        
             expectedModules.add('NativeModule _stream_writable'); 
        
             expectedModules.add('NativeModule internal/error-serdes'); 
        
             expectedModules.add('NativeModule internal/process/worker_thread_only'); 
        
             expectedModules.add('NativeModule internal/streams/buffer_list'); 
        
             expectedModules.add('NativeModule internal/streams/destroy'); 
        
             expectedModules.add('NativeModule internal/streams/end-of-stream'); 
        
             expectedModules.add('NativeModule internal/streams/legacy'); 
        
             expectedModules.add('NativeModule internal/streams/pipeline'); 
        
             expectedModules.add('NativeModule internal/streams/state'); 
        
             expectedModules.add('NativeModule internal/worker'); 
        
             expectedModules.add('NativeModule internal/worker/io'); 
        
             expectedModules.add('NativeModule stream'); 
        
             expectedModules.add('NativeModule worker_threads'); 
        
           }

otherwise perhaps internal/heap_utils should be lazily loaded.

codecov-io · 2020-02-01T04:19:31Z

Codecov Report

Merging #31569 into master will increase coverage by 1.13%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #31569      +/-   ##
==========================================
+ Coverage   96.16%    97.3%   +1.13%     
==========================================
  Files         193      193              
  Lines       64651    64653       +2     
==========================================
+ Hits        62172    62910     +738     
+ Misses       2479     1743     -736

Impacted Files	Coverage Δ
lib/_http_server.js	`98.16% <0%> (-0.12%)`	⬇️
lib/internal/process/per_thread.js	`98.62% <0%> (ø)`	⬆️
lib/internal/http2/core.js	`96.51% <0%> (+0.12%)`	⬆️
lib/internal/fs/utils.js	`97.2% <0%> (+0.29%)`	⬆️
lib/child_process.js	`100% <0%> (+0.57%)`	⬆️
lib/internal/child_process/serialization.js	`93.49% <0%> (+0.81%)`	⬆️
lib/internal/streams/async_iterator.js	`99.12% <0%> (+0.85%)`	⬆️
lib/internal/url.js	`98.68% <0%> (+1.17%)`	⬆️
lib/internal/child_process.js	`97.23% <0%> (+1.29%)`	⬆️
lib/net.js	`98.46% <0%> (+1.41%)`	⬆️
... and 26 more

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addaleax · 2020-02-01T10:30:39Z

Needs a rebase.

Done! :)

otherwise perhaps internal/heap_utils should be lazily loaded.

Yeah, I think that makes sense here. Done! 👍

nodejs-github-bot · 2020-02-01T10:31:32Z

CI: https://ci.nodejs.org/job/node-test-pull-request/28841/

nodejs-github-bot · 2020-02-01T22:51:24Z

CI: https://ci.nodejs.org/job/node-test-pull-request/28866/

nodejs-github-bot · 2020-02-02T13:15:27Z

CI: https://ci.nodejs.org/job/node-test-pull-request/28875/

nodejs-github-bot · 2020-02-02T23:37:42Z

CI: https://ci.nodejs.org/job/node-test-pull-request/28881/

nodejs-github-bot · 2020-02-03T03:47:59Z

CI: https://ci.nodejs.org/job/node-test-pull-request/28887/

Trott · 2020-02-03T15:04:35Z

Landed in 875a4d1

PR-URL: #31569 Reviewed-By: Denys Otrishko <shishugi@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Richard Lau <riclau@uk.ibm.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

Notable changes: * async_hooks * add executionAsyncResource (Matteo Collina) #30959 * crypto * add crypto.diffieHellman (Tobias Nießen) #31178 * add DH support to generateKeyPair (Tobias Nießen) #31178 * simplify DH groups (Tobias Nießen) #31178 * add key type 'dh' (Tobias Nießen) #31178 * test * skip keygen tests on arm systems (Tobias Nießen) #31178 * perf_hooks * add property flags to GCPerformanceEntry (Kirill Fomichev) #29547 * process * report ArrayBuffer memory in `memoryUsage()` (Anna Henningsen) #31550 * readline * make tab size configurable (Ruben Bridgewater) #31318 * report * add support for Workers (Anna Henningsen) #31386 * worker * add ability to take heap snapshot from parent thread (Anna Henningsen) #31569 * added new collaborators * add ronag to collaborators (Robert Nagy) #31498 PR-URL: #31837

Adapt doc to match implementation which exports getHeapSnapshot(). PR-URL: #32061 Refs: #31569 Refs: https://github.com/nodejs/node/blob/987a67339518d0380177a2e589f2bbd274230d0e/lib/internal/worker.js#L323 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Shelley Vohr <codebytere@gmail.com> Reviewed-By: Matheus Marchini <mat@mmarchini.me> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

PR-URL: nodejs#31569 Reviewed-By: Denys Otrishko <shishugi@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Richard Lau <riclau@uk.ibm.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

Adapt doc to match implementation which exports getHeapSnapshot(). PR-URL: nodejs#32061 Refs: nodejs#31569 Refs: https://github.com/nodejs/node/blob/987a67339518d0380177a2e589f2bbd274230d0e/lib/internal/worker.js#L323 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Shelley Vohr <codebytere@gmail.com> Reviewed-By: Matheus Marchini <mat@mmarchini.me> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

PR-URL: #31569 Reviewed-By: Denys Otrishko <shishugi@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Gus Caplan <me@gus.host> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Richard Lau <riclau@uk.ibm.com> Reviewed-By: Rich Trott <rtrott@gmail.com>

Adapt doc to match implementation which exports getHeapSnapshot(). PR-URL: #32061 Refs: #31569 Refs: https://github.com/nodejs/node/blob/987a67339518d0380177a2e589f2bbd274230d0e/lib/internal/worker.js#L323 Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: Shelley Vohr <codebytere@gmail.com> Reviewed-By: Matheus Marchini <mat@mmarchini.me> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Luigi Pinca <luigipinca@gmail.com> Reviewed-By: Rich Trott <rtrott@gmail.com> Reviewed-By: Ruben Bridgewater <ruben@bridgewater.de>

addaleax added semver-minor PRs that contain new features and should be released in the next minor version. worker Issues and PRs related to Worker support. labels Jan 29, 2020

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addaleax removed the lib / src Issues and PRs related to general changes in the lib or src directory. label Jan 29, 2020

addaleax force-pushed the worker-heapdump branch from a1e2c47 to 60e6b4f Compare January 29, 2020 17:30

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addaleax added 6 commits February 1, 2020 11:15

worker: add ability to take heap snapshot from parent thread

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fixup! worker: add ability to take heap snapshot from parent thread

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fixup! worker: add ability to take heap snapshot from parent thread

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fixup! worker: add ability to take heap snapshot from parent thread

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fixup! worker: add ability to take heap snapshot from parent thread

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fixup! worker: add ability to take heap snapshot from parent thread

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addaleax force-pushed the worker-heapdump branch from 9aae228 to 6bbff20 Compare February 1, 2020 10:30

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addaleax deleted the worker-heapdump branch February 4, 2020 16:41

codebytere mentioned this pull request Feb 17, 2020

v13.9.0 proposal #31837

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Worker threads hyj1991/v8-profiler-next#9

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doc: change worker.takeHeapSnapshot to getHeapSnapshot #32061

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src: revamp internal field count tracking #31960

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worker: add ability to take heap snapshot from parent thread #31569

worker: add ability to take heap snapshot from parent thread #31569

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worker: add ability to take heap snapshot from parent thread #31569

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