test: harden the tick sampling logic #32190
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Under peculiar system load conditions, the profiler thread does not get enough CPU slices to perform the sampling. Improve the interaction between worker and parent thread by performing a large disc read, which is a better blend of CPU and I/O bound work, than earlier versions. This produces x10 more samples than the existing one, in 10 iterations, as opposed to 1024. Also capture worker error situations to improve debugging Refs: nodejs#26401 (comment)
bnoordhuis
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Mar 11, 2020
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Mar 12, 2020
addaleax
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Mar 13, 2020
addaleax
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@HarshithaKP Looks like the test failed in CI in debug mode? |
addaleax
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looks like both probably we should limit the volume of either the disc read, or the transport? |
jasnell
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Mar 16, 2020
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Under peculiar system load conditions, the profiler thread does not get enough CPU slices to perform the sampling. Improve the interaction between worker and parent thread by performing a large disc read, which is a better blend of CPU and I/O bound work, than earlier versions. This produces x10 more samples than the existing one, in 10 iterations, as opposed to 1024. Also capture worker error situations to improve debugging Refs: #26401 (comment) PR-URL: #32190 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: James M Snell <jasnell@gmail.com>
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addaleax
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Under peculiar system load conditions, the profiler thread does not get enough CPU slices to perform the sampling. Improve the interaction between worker and parent thread by performing a large disc read, which is a better blend of CPU and I/O bound work, than earlier versions. This produces x10 more samples than the existing one, in 10 iterations, as opposed to 1024. Also capture worker error situations to improve debugging Refs: #26401 (comment) PR-URL: #32190 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: James M Snell <jasnell@gmail.com>
targos
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Under peculiar system load conditions, the profiler thread does not get enough CPU slices to perform the sampling. Improve the interaction between worker and parent thread by performing a large disc read, which is a better blend of CPU and I/O bound work, than earlier versions. This produces x10 more samples than the existing one, in 10 iterations, as opposed to 1024. Also capture worker error situations to improve debugging Refs: #26401 (comment) PR-URL: #32190 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Anna Henningsen <anna@addaleax.net> Reviewed-By: James M Snell <jasnell@gmail.com>
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Under peculiar system load conditions, the profiler thread
does not get enough CPU slices to perform the sampling.
Improve the interaction between worker and parent thread
by performing a large disc read, which is a better blend of
CPU and I/O bound work, than earlier versions.
This produces x10 more samples than the existing one,
in 10 iterations, as opposed to 1024.
Also capture worker error situations to improve debugging
Refs: #26401 (comment)
Checklist
make -j4 test(UNIX), orvcbuild test(Windows) passes