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Respect Linux cgroup CPU number for --threads value
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We want to respect `cgroup` constraints so that when we run in a container, the default max threads value is appropriately set to the maximum number of cores in this container rather than the host OS's.

We check both `/sys/fs/cgroup/cpuset.cpus.effective` (`cgroup v2`) and `/sys/fs/cgroup/cpuset.cpus` (`cgroup v1`) to find the number of cores.
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angelapwen committed Jan 22, 2024
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39 changes: 38 additions & 1 deletion lib/util.js
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