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build: sync between benchies (#8919)

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Sometimes, the benchmarks fail to start up pageserver in 10s without any
obvious reason. Benchmarks run sequentially on otherwise idle runners.
Try running `sync(2)` after each bench to force a cleaner slate.

Implement this via:
- SYNC_AFTER_EACH_TEST environment variable enabled autouse fixture
- autouse fixture seems to be outermost fixture, so it works as expected
- set SYNC_AFTER_EACH_TEST=true for benchmarks in build_and_test
workflow

Evidence:
https://neon-github-public-dev.s3.amazonaws.com/reports/main/10678984691/index.html#suites/5008d72a1ba3c0d618a030a938fc035c/1210266507534c0f/

---------

Co-authored-by: Alexander Bayandin <alexander@neon.tech>
This commit is contained in:
Joonas Koivunen
2024-09-05 16:29:48 +03:00
committed by GitHub
parent 850421ec06
commit efe03d5a1c
2 changed files with 27 additions and 0 deletions
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.github/workflows/build_and_test.yml vendored
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@@ -286,6 +286,7 @@ jobs:
PERF_TEST_RESULT_CONNSTR: "${{ secrets.PERF_TEST_RESULT_CONNSTR }}"
TEST_RESULT_CONNSTR: "${{ secrets.REGRESS_TEST_RESULT_CONNSTR_NEW }}"
PAGESERVER_VIRTUAL_FILE_IO_ENGINE: tokio-epoll-uring
SYNC_AFTER_EACH_TEST: true
# XXX: no coverage data handling here, since benchmarks are run on release builds,
# while coverage is currently collected for the debug ones