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Drop parallel build from stress tests

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BUILD_PARALLEL_JOBS environmental variable is set to 6, which does not
align well with 4 and 8 CPU core systems dedicated to CI "stress" tests.
When multiple parallel jobs run on the host, they compete for resources
with an undesirable result: 6 compiler processes of one job may starve
named, resulting in lower-than-expected throughput and minutes-long
query response latency spikes.

Better drop the build parallelism of BIND-under-test. About 1-2 minutes
are added to the 60-65 minutes long job duration.
This commit is contained in:
Michal Nowak 2023-03-09 11:10:53 +01:00
parent ce49dccf40
commit 3fd7e7c81f
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1 changed files with 5 additions and 1 deletions
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.gitlab-ci.yml
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@ -1362,12 +1362,16 @@ respdiff-long-third-party:
# "Stress" tests
# Parallel build in the "make" step is avoided since multiple jobs can be
# executed concurrently on the same runner. This may present problems when one
# job runs a performance-sensitive task of replying to queries while another
# takes all cores to build BIND.
.stress: &stress_job
stage: performance
script:
- *configure
- *setup_interfaces
- make -j${BUILD_PARALLEL_JOBS:-1} -k all V=1
- make -k all V=1
- make DESTDIR="${INSTALL_PATH}" install
- git clone --depth 1 https://gitlab-ci-token:${CI_JOB_TOKEN}@gitlab.isc.org/isc-private/bind-qa.git
- cd bind-qa/bind9/stress