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The daemon process is now moved into a new sub-cgroup called nix-daemon when the daemon starts. This is necessary to abide by the no-processes-in-inner-nodes rule, because the service cgroup becomes an inner node when the child cgroups for the build are created (see LocalDerivationGoal::startBuilder()). See #9675
37 lines
867 B
C++
37 lines
867 B
C++
#pragma once
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///@file
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#include <chrono>
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#include <optional>
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#include "types.hh"
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namespace nix {
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std::optional<Path> getCgroupFS();
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std::map<std::string, std::string> getCgroups(const Path & cgroupFile);
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struct CgroupStats
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{
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std::optional<std::chrono::microseconds> cpuUser, cpuSystem;
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};
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/**
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* Destroy the cgroup denoted by 'path'. The postcondition is that
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* 'path' does not exist, and thus any processes in the cgroup have
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* been killed. Also return statistics from the cgroup just before
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* destruction.
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*/
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CgroupStats destroyCgroup(const Path & cgroup);
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std::string getCurrentCgroup();
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/**
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* Get the cgroup that should be used as the parent when creating new
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* sub-cgroups. The first time this is called, the current cgroup will be
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* returned, and then all subsequent calls will return the original cgroup.
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*/
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std::string getRootCgroup();
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}
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