diff options
Diffstat (limited to 'vendor/go.uber.org/automaxprocs/internal/cgroups/cgroups.go')
| -rw-r--r-- | vendor/go.uber.org/automaxprocs/internal/cgroups/cgroups.go | 118 |
1 files changed, 0 insertions, 118 deletions
diff --git a/vendor/go.uber.org/automaxprocs/internal/cgroups/cgroups.go b/vendor/go.uber.org/automaxprocs/internal/cgroups/cgroups.go deleted file mode 100644 index e89f54360..000000000 --- a/vendor/go.uber.org/automaxprocs/internal/cgroups/cgroups.go +++ /dev/null @@ -1,118 +0,0 @@ -// Copyright (c) 2017 Uber Technologies, Inc. -// -// Permission is hereby granted, free of charge, to any person obtaining a copy -// of this software and associated documentation files (the "Software"), to deal -// in the Software without restriction, including without limitation the rights -// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell -// copies of the Software, and to permit persons to whom the Software is -// furnished to do so, subject to the following conditions: -// -// The above copyright notice and this permission notice shall be included in -// all copies or substantial portions of the Software. -// -// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR -// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, -// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE -// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER -// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, -// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN -// THE SOFTWARE. - -//go:build linux -// +build linux - -package cgroups - -const ( - // _cgroupFSType is the Linux CGroup file system type used in - // `/proc/$PID/mountinfo`. - _cgroupFSType = "cgroup" - // _cgroupSubsysCPU is the CPU CGroup subsystem. - _cgroupSubsysCPU = "cpu" - // _cgroupSubsysCPUAcct is the CPU accounting CGroup subsystem. - _cgroupSubsysCPUAcct = "cpuacct" - // _cgroupSubsysCPUSet is the CPUSet CGroup subsystem. - _cgroupSubsysCPUSet = "cpuset" - // _cgroupSubsysMemory is the Memory CGroup subsystem. - _cgroupSubsysMemory = "memory" - - // _cgroupCPUCFSQuotaUsParam is the file name for the CGroup CFS quota - // parameter. - _cgroupCPUCFSQuotaUsParam = "cpu.cfs_quota_us" - // _cgroupCPUCFSPeriodUsParam is the file name for the CGroup CFS period - // parameter. - _cgroupCPUCFSPeriodUsParam = "cpu.cfs_period_us" -) - -const ( - _procPathCGroup = "/proc/self/cgroup" - _procPathMountInfo = "/proc/self/mountinfo" -) - -// CGroups is a map that associates each CGroup with its subsystem name. -type CGroups map[string]*CGroup - -// NewCGroups returns a new *CGroups from given `mountinfo` and `cgroup` files -// under for some process under `/proc` file system (see also proc(5) for more -// information). -func NewCGroups(procPathMountInfo, procPathCGroup string) (CGroups, error) { - cgroupSubsystems, err := parseCGroupSubsystems(procPathCGroup) - if err != nil { - return nil, err - } - - cgroups := make(CGroups) - newMountPoint := func(mp *MountPoint) error { - if mp.FSType != _cgroupFSType { - return nil - } - - for _, opt := range mp.SuperOptions { - subsys, exists := cgroupSubsystems[opt] - if !exists { - continue - } - - cgroupPath, err := mp.Translate(subsys.Name) - if err != nil { - return err - } - cgroups[opt] = NewCGroup(cgroupPath) - } - - return nil - } - - if err := parseMountInfo(procPathMountInfo, newMountPoint); err != nil { - return nil, err - } - return cgroups, nil -} - -// NewCGroupsForCurrentProcess returns a new *CGroups instance for the current -// process. -func NewCGroupsForCurrentProcess() (CGroups, error) { - return NewCGroups(_procPathMountInfo, _procPathCGroup) -} - -// CPUQuota returns the CPU quota applied with the CPU cgroup controller. -// It is a result of `cpu.cfs_quota_us / cpu.cfs_period_us`. If the value of -// `cpu.cfs_quota_us` was not set (-1), the method returns `(-1, nil)`. -func (cg CGroups) CPUQuota() (float64, bool, error) { - cpuCGroup, exists := cg[_cgroupSubsysCPU] - if !exists { - return -1, false, nil - } - - cfsQuotaUs, err := cpuCGroup.readInt(_cgroupCPUCFSQuotaUsParam) - if defined := cfsQuotaUs > 0; err != nil || !defined { - return -1, defined, err - } - - cfsPeriodUs, err := cpuCGroup.readInt(_cgroupCPUCFSPeriodUsParam) - if defined := cfsPeriodUs > 0; err != nil || !defined { - return -1, defined, err - } - - return float64(cfsQuotaUs) / float64(cfsPeriodUs), true, nil -} |