cgroup

type BlockIOSubsystem struct {
	Metadata
	Throttle ThrottlePolicy `json:"throttle,omitempty"` // Throttle limits for upper IO rates and metrics.

}

type CFQDevice struct {
	DeviceID DeviceID `json:"device_id"` // ID of the device.

	// Proportional weight for the device. 0 means a per device weight is not set and
	// that the blkio.weight value is used.
	Weight uint64 `json:"weight"`

	TimeMs           uint64          `json:"time_ms"`          // Disk time allocated to cgroup per device in milliseconds.
	Sectors          uint64          `json:"sectors"`          // Number of sectors transferred to/from disk by the cgroup.
	Bytes            OperationValues `json:"io_service_bytes"` // Number of bytes transferred to/from the disk by the cgroup.
	IOs              OperationValues `json:"io_serviced"`      // Number of IO operations issued to the disk by the cgroup.
	ServiceTimeNanos OperationValues `json:"io_service_time"`  // Amount of time between request dispatch and request completion for the IOs done by this cgroup.
	WaitTimeNanos    OperationValues `json:"io_wait_time"`     // Amount of time the IOs for this cgroup spent waiting in the scheduler queues for service.
	Merges           OperationValues `json:"io_merged"`        // Total number of bios/requests merged into requests belonging to this cgroup.
}

type CFQScheduler struct {
	Weight  uint64      `json:"weight"` // Default weight for all devices unless overridden. Allowed range of weights is from 10 to 1000.
	Devices []CFQDevice `json:"devices,omitempty"`
}

type CFS struct {
	// Period of time in microseconds for how regularly the cgroup's access to
	// CPU resources should be reallocated.
	PeriodMicros uint64 `json:"period_us"`
	// Total amount of time in microseconds for which all tasks in the cgroup
	// can run during one period.
	QuotaMicros uint64 `json:"quota_us"`
	// Relative share of CPU time available to tasks the cgroup. The value is
	// an integer greater than or equal to 2.
	Shares uint64 `json:"shares"`
}

type CPUAccountingStats struct {
	UserNanos   uint64 `json:"user_nanos"`
	SystemNanos uint64 `json:"system_nanos"`
}

type CPUAccountingSubsystem struct {
	Metadata
	TotalNanos  uint64   `json:"total_nanos"`
	UsagePerCPU []uint64 `json:"usage_percpu_nanos"`
	// CPU time statistics for tasks in this cgroup.
	Stats CPUAccountingStats `json:"stats,omitempty"`
}

type CPUSubsystem struct {
	Metadata
	// Completely Fair Scheduler (CFS) settings.
	CFS CFS `json:"cfs,omitempty"`
	// Real-time (RT) Scheduler settings.
	RT RT `json:"rt,omitempty"`
	// CPU time statistics for tasks in this cgroup.
	Stats ThrottleStats `json:"stats,omitempty"`
}

type DeviceID struct {
	Major uint64
	Minor uint64
}

type MemoryData struct {
	Usage     uint64 `json:"usage"`         // Usage in bytes.
	MaxUsage  uint64 `json:"max_usage"`     // Max usage in bytes.
	Limit     uint64 `json:"limit"`         // Limit in bytes.
	FailCount uint64 `json:"failure_count"` // Number of times the memory limit has been reached.
}

type MemoryStat struct {
	// Page cache, including tmpfs (shmem), in bytes.
	Cache uint64 `json:"cache"`
	// Anonymous and swap cache, not including tmpfs (shmem), in bytes.
	RSS uint64 `json:"rss"`
	// Anonymous transparent hugepages in bytes.
	RSSHuge uint64 `json:"rss_huge"`
	// Size of memory-mapped mapped files, including tmpfs (shmem), in bytes.
	MappedFile uint64 `json:"mapped_file"`
	// Number of pages paged into memory.
	PagesIn uint64 `json:"pgpgin"`
	// Number of pages paged out of memory.
	PagesOut uint64 `json:"pgpgout"`
	// Number of times a task in the cgroup triggered a page fault.
	PageFaults uint64 `json:"pgfault"`
	// Number of times a task in the cgroup triggered a major page fault.
	MajorPageFaults uint64 `json:"pgmajfault"`
	// Swap usage in bytes.
	Swap uint64 `json:"swap"`
	// Anonymous and swap cache on active least-recently-used (LRU) list, including tmpfs (shmem), in bytes.
	ActiveAnon uint64 `json:"active_anon"`
	// Anonymous and swap cache on inactive LRU list, including tmpfs (shmem), in bytes.
	InactiveAnon uint64 `json:"inactive_anon"`
	// File-backed memory on active LRU list, in bytes.
	ActiveFile uint64 `json:"active_file"`
	// File-backed memory on inactive LRU list, in bytes.
	InactiveFile uint64 `json:"inactive_file"`
	// Memory that cannot be reclaimed, in bytes.
	Unevictable uint64 `json:"unevictable"`
	// Memory limit for the hierarchy that contains the memory cgroup, in bytes.
	HierarchicalMemoryLimit uint64 `json:"hierarchical_memory_limit"`
	// Memory plus swap limit for the hierarchy that contains the memory cgroup, in bytes.
	HierarchicalMemswLimit uint64 `json:"hierarchical_memsw_limit"`
}

type MemorySubsystem struct {
	Metadata
	Mem       MemoryData `json:"mem"`      // Memory usage by tasks in this cgroup.
	MemSwap   MemoryData `json:"memsw"`    // Memory plus swap usage by tasks in this cgroup.
	Kernel    MemoryData `json:"kmem"`     // Kernel memory used by tasks in this cgroup.
	KernelTCP MemoryData `json:"kmem_tcp"` // Kernel TCP buffer memory used by tasks in this cgroup.
	Stats     MemoryStat `json:"stats"`    // A wide range of memory statistics.
}

type Metadata struct {
	ID   string `json:"id,omitempty"`   // ID of the cgroup.
	Path string `json:"path,omitempty"` // Path to the cgroup relative to the cgroup subsystem's mountpoint.
}

type OperationValues struct {
	Read  uint64 `json:"read"`
	Write uint64 `json:"write"`
	Async uint64 `json:"async"`
	Sync  uint64 `json:"sync"`
}

type RT struct {
	// Period of time in microseconds for how regularly the cgroup's access to
	// CPU resources should be reallocated.
	PeriodMicros uint64 `json:"period_us"`
	// Period of time in microseconds for the longest continuous period in which
	// the tasks in the cgroup have access to CPU resources.
	RuntimeMicros uint64 `json:"quota_us"`
}

type Reader struct {
	// contains filtered or unexported fields
}

type Stats struct {
	Metadata
	CPU           *CPUSubsystem           `json:"cpu"`
	CPUAccounting *CPUAccountingSubsystem `json:"cpuacct"`
	Memory        *MemorySubsystem        `json:"memory"`
	BlockIO       *BlockIOSubsystem       `json:"blkio"`
}

type ThrottleDevice struct {
	DeviceID DeviceID `json:"device_id"` // ID of the device.

	ReadLimitBPS   uint64 `json:"read_bps_device"`   // Read limit in bytes per second (BPS). Zero means no limit.
	WriteLimitBPS  uint64 `json:"write_bps_device"`  // Write limit in bytes per second (BPS). Zero mean no limit.
	ReadLimitIOPS  uint64 `json:"read_iops_device"`  // Read limit in IOPS. Zero means no limit.
	WriteLimitIOPS uint64 `json:"write_iops_device"` // Write limit in IOPS. Zero means no limit.

	Bytes OperationValues `json:"io_service_bytes"` // Number of bytes transferred to/from the disk by the cgroup.
	IOs   OperationValues `json:"io_serviced"`      // Number of IO operations issued to the disk by the cgroup.
}

type ThrottlePolicy struct {
	Devices    []ThrottleDevice `json:"devices,omitempty"`      // Device centric view of limits and metrics.
	TotalBytes uint64           `json:"total_io_service_bytes"` // Total number of bytes serviced by all devices.
	TotalIOs   uint64           `json:"total_io_serviced"`      // Total number of IO operations serviced by all devices.
}

type ThrottleStats struct {
	// Number of periods with throttling active.
	Periods uint64 `json:"periods,omitempty"`
	// Number of periods when the cgroup hit its throttling limit.
	ThrottledPeriods uint64 `json:"throttled_periods,omitempty"`
	// Aggregate time the cgroup was throttled for in nanoseconds.
	ThrottledTimeNanos uint64 `json:"throttled_nanos,omitempty"`
}