procfs

package
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Published: Feb 9, 2021 License: Apache-2.0 Imports: 18 Imported by: 0

Documentation

Overview

Package procfs provides functions to retrieve system, kernel and process metrics from the pseudo-filesystem proc.

Example:

package main

import (
	"fmt"
	"log"

	"github.com/prometheus/procfs"
)

func main() {
	p, err := procfs.Self()
	if err != nil {
		log.Fatalf("could not get process: %s", err)
	}

	stat, err := p.NewStat()
	if err != nil {
		log.Fatalf("could not get process stat: %s", err)
	}

	fmt.Printf("command:  %s\n", stat.Comm)
	fmt.Printf("cpu time: %fs\n", stat.CPUTime())
	fmt.Printf("vsize:    %dB\n", stat.VirtualMemory())
	fmt.Printf("rss:      %dB\n", stat.ResidentMemory())
}

Index

Constants

View Source
const DefaultMountPoint = fs.DefaultProcMountPoint

DefaultMountPoint is the common mount point of the proc filesystem.

Variables

This section is empty.

Functions

This section is empty.

Types

type ARPEntry

type ARPEntry struct {
	// IP address
	IPAddr net.IP
	// MAC address
	HWAddr net.HardwareAddr
	// Name of the device
	Device string
}

ARPEntry contains a single row of the columnar data represented in /proc/net/arp.

type BuddyInfo

type BuddyInfo struct {
	Node  string
	Zone  string
	Sizes []float64
}

A BuddyInfo is the details parsed from /proc/buddyinfo. The data is comprised of an array of free fragments of each size. The sizes are 2^n*PAGE_SIZE, where n is the array index.

type CPUInfo

type CPUInfo struct {
	Processor       uint
	VendorID        string
	CPUFamily       string
	Model           string
	ModelName       string
	Stepping        string
	Microcode       string
	CPUMHz          float64
	CacheSize       string
	PhysicalID      string
	Siblings        uint
	CoreID          string
	CPUCores        uint
	APICID          string
	InitialAPICID   string
	FPU             string
	FPUException    string
	CPUIDLevel      uint
	WP              string
	Flags           []string
	Bugs            []string
	BogoMips        float64
	CLFlushSize     uint
	CacheAlignment  uint
	AddressSizes    string
	PowerManagement string
}

CPUInfo contains general information about a system CPU found in /proc/cpuinfo

type CPUStat

type CPUStat struct {
	User      float64
	Nice      float64
	System    float64
	Idle      float64
	Iowait    float64
	IRQ       float64
	SoftIRQ   float64
	Steal     float64
	Guest     float64
	GuestNice float64
}

CPUStat shows how much time the cpu spend in various stages.

type Cgroup

type Cgroup struct {
	// HierarchyID that can be matched to a named hierarchy using /proc/cgroups. Cgroups V2 only has one
	// hierarchy, so HierarchyID is always 0. For cgroups v1 this is a unique ID number
	HierarchyID int
	// Controllers using this hierarchy of processes. Controllers are also known as subsystems. For
	// Cgroups V2 this may be empty, as all active controllers use the same hierarchy
	Controllers []string
	// Path of this control group, relative to the mount point of the cgroupfs representing this specific
	// hierarchy
	Path string
}

Cgroup models one line from /proc/[pid]/cgroup. Each Cgroup struct describes the the placement of a PID inside a specific control hierarchy. The kernel has two cgroup APIs, v1 and v2. v1 has one hierarchy per available resource controller, while v2 has one unified hierarchy shared by all controllers. Regardless of v1 or v2, all hierarchies contain all running processes, so the question answerable with a Cgroup struct is 'where is this process in this hierarchy' (where==what path on the specific cgroupfs). By prefixing this path with the mount point of *this specific* hierarchy, you can locate the relevant pseudo-files needed to read/set the data for this PID in this hierarchy

Also see http://man7.org/linux/man-pages/man7/cgroups.7.html

type ConntrackStatEntry

type ConntrackStatEntry struct {
	Entries       uint64
	Found         uint64
	Invalid       uint64
	Ignore        uint64
	Insert        uint64
	InsertFailed  uint64
	Drop          uint64
	EarlyDrop     uint64
	SearchRestart uint64
}

A ConntrackStatEntry represents one line from net/stat/nf_conntrack and contains netfilter conntrack statistics at one CPU core

type Crypto

type Crypto struct {
	Alignmask   *uint64
	Async       bool
	Blocksize   *uint64
	Chunksize   *uint64
	Ctxsize     *uint64
	Digestsize  *uint64
	Driver      string
	Geniv       string
	Internal    string
	Ivsize      *uint64
	Maxauthsize *uint64
	MaxKeysize  *uint64
	MinKeysize  *uint64
	Module      string
	Name        string
	Priority    *int64
	Refcnt      *int64
	Seedsize    *uint64
	Selftest    string
	Type        string
	Walksize    *uint64
}

Crypto holds info parsed from /proc/crypto.

type FS

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

FS represents the pseudo-filesystem sys, which provides an interface to kernel data structures.

func NewDefaultFS

func NewDefaultFS() (FS, error)

NewDefaultFS returns a new proc FS mounted under the default proc mountPoint. It will error if the mount point directory can't be read or is a file.

func NewFS

func NewFS(mountPoint string) (FS, error)

NewFS returns a new proc FS mounted under the given proc mountPoint. It will error if the mount point directory can't be read or is a file.

func (FS) AllProcs

func (fs FS) AllProcs() (Procs, error)

AllProcs returns a list of all currently available processes.

func (FS) BuddyInfo

func (fs FS) BuddyInfo() ([]BuddyInfo, error)

BuddyInfo reads the buddyinfo statistics from the specified `proc` filesystem.

func (FS) CPUInfo

func (fs FS) CPUInfo() ([]CPUInfo, error)

CPUInfo returns information about current system CPUs. See https://www.kernel.org/doc/Documentation/filesystems/proc.txt

func (FS) ConntrackStat

func (fs FS) ConntrackStat() ([]ConntrackStatEntry, error)

ConntrackStat retrieves netfilter's conntrack statistics, split by CPU cores

func (FS) Crypto

func (fs FS) Crypto() ([]Crypto, error)

Crypto parses an crypto-file (/proc/crypto) and returns a slice of structs containing the relevant info. More information available here: https://kernel.readthedocs.io/en/sphinx-samples/crypto-API.html

func (FS) Fscacheinfo

func (fs FS) Fscacheinfo() (Fscacheinfo, error)

Fscacheinfo returns information about current fscache statistics. See https://www.kernel.org/doc/Documentation/filesystems/caching/fscache.txt

func (FS) GatherARPEntries

func (fs FS) GatherARPEntries() ([]ARPEntry, error)

GatherARPEntries retrieves all the ARP entries, parse the relevant columns, and then return a slice of ARPEntry's.

func (FS) IPVSBackendStatus

func (fs FS) IPVSBackendStatus() ([]IPVSBackendStatus, error)

IPVSBackendStatus reads and returns the status of all (virtual,real) server pairs from the specified `proc` filesystem.

func (FS) IPVSStats

func (fs FS) IPVSStats() (IPVSStats, error)

IPVSStats reads the IPVS statistics from the specified `proc` filesystem.

func (FS) KernelRandom

func (fs FS) KernelRandom() (KernelRandom, error)

KernelRandom returns values from /proc/sys/kernel/random.

func (FS) LoadAvg

func (fs FS) LoadAvg() (*LoadAvg, error)

LoadAvg returns loadavg from /proc.

func (FS) MDStat

func (fs FS) MDStat() ([]MDStat, error)

MDStat parses an mdstat-file (/proc/mdstat) and returns a slice of structs containing the relevant info. More information available here: https://raid.wiki.kernel.org/index.php/Mdstat

func (FS) Meminfo

func (fs FS) Meminfo() (Meminfo, error)

Meminfo returns an information about current kernel/system memory statistics. See https://www.kernel.org/doc/Documentation/filesystems/proc.txt

func (FS) NetDev

func (fs FS) NetDev() (NetDev, error)

NetDev returns kernel/system statistics read from /proc/net/dev.

func (FS) NetSockstat

func (fs FS) NetSockstat() (*NetSockstat, error)

NetSockstat retrieves IPv4 socket statistics.

func (FS) NetSockstat6

func (fs FS) NetSockstat6() (*NetSockstat, error)

NetSockstat6 retrieves IPv6 socket statistics.

If IPv6 is disabled on this kernel, the returned error can be checked with os.IsNotExist.

func (FS) NetSoftnetStat

func (fs FS) NetSoftnetStat() ([]SoftnetStat, error)

NetSoftnetStat reads data from /proc/net/softnet_stat.

func (FS) NetUDP

func (fs FS) NetUDP() (NetUDP, error)

NetUDP returns the IPv4 kernel/networking statistics for UDP datagrams read from /proc/net/udp.

func (FS) NetUDP6

func (fs FS) NetUDP6() (NetUDP, error)

NetUDP6 returns the IPv6 kernel/networking statistics for UDP datagrams read from /proc/net/udp6.

func (FS) NetUDP6Summary

func (fs FS) NetUDP6Summary() (*NetUDPSummary, error)

NetUDP6Summary returns already computed statistics like the total queue lengths for UDP datagrams read from /proc/net/udp6.

func (FS) NetUDPSummary

func (fs FS) NetUDPSummary() (*NetUDPSummary, error)

NetUDPSummary returns already computed statistics like the total queue lengths for UDP datagrams read from /proc/net/udp.

func (FS) NetUNIX

func (fs FS) NetUNIX() (*NetUNIX, error)

NetUNIX returns data read from /proc/net/unix.

func (FS) NewProc deprecated

func (fs FS) NewProc(pid int) (Proc, error)

NewProc returns a process for the given pid.

Deprecated: use fs.Proc() instead

func (FS) NewStat deprecated

func (fs FS) NewStat() (Stat, error)

NewStat returns information about current cpu/process statistics. See https://www.kernel.org/doc/Documentation/filesystems/proc.txt

Deprecated: use fs.Stat() instead

func (FS) NewXfrmStat

func (fs FS) NewXfrmStat() (XfrmStat, error)

NewXfrmStat reads the xfrm_stat statistics from the 'proc' filesystem.

func (FS) PSIStatsForResource

func (fs FS) PSIStatsForResource(resource string) (PSIStats, error)

PSIStatsForResource reads pressure stall information for the specified resource from /proc/pressure/<resource>. At time of writing this can be either "cpu", "memory" or "io".

func (FS) Proc

func (fs FS) Proc(pid int) (Proc, error)

Proc returns a process for the given pid.

func (FS) Schedstat

func (fs FS) Schedstat() (*Schedstat, error)

Schedstat reads data from /proc/schedstat

func (FS) Self

func (fs FS) Self() (Proc, error)

Self returns a process for the current process.

func (FS) Stat

func (fs FS) Stat() (Stat, error)

Stat returns information about current cpu/process statistics. See https://www.kernel.org/doc/Documentation/filesystems/proc.txt

func (FS) Swaps

func (fs FS) Swaps() ([]*Swap, error)

Swaps returns a slice of all configured swap devices on the system.

func (FS) VM

func (fs FS) VM() (*VM, error)

VM reads the VM statistics from the specified `proc` filesystem.

func (FS) Zoneinfo

func (fs FS) Zoneinfo() ([]Zoneinfo, error)

Zoneinfo parses an zoneinfo-file (/proc/zoneinfo) and returns a slice of structs containing the relevant info. More information available here: https://www.kernel.org/doc/Documentation/sysctl/vm.txt

type Fscacheinfo

type Fscacheinfo struct {
	// Number of index cookies allocated
	IndexCookiesAllocated uint64
	// data storage cookies allocated
	DataStorageCookiesAllocated uint64
	// Number of special cookies allocated
	SpecialCookiesAllocated uint64
	// Number of objects allocated
	ObjectsAllocated uint64
	// Number of object allocation failures
	ObjectAllocationsFailure uint64
	// Number of objects that reached the available state
	ObjectsAvailable uint64
	// Number of objects that reached the dead state
	ObjectsDead uint64
	// Number of objects that didn't have a coherency check
	ObjectsWithoutCoherencyCheck uint64
	// Number of objects that passed a coherency check
	ObjectsWithCoherencyCheck uint64
	// Number of objects that needed a coherency data update
	ObjectsNeedCoherencyCheckUpdate uint64
	// Number of objects that were declared obsolete
	ObjectsDeclaredObsolete uint64
	// Number of pages marked as being cached
	PagesMarkedAsBeingCached uint64
	// Number of uncache page requests seen
	UncachePagesRequestSeen uint64
	// Number of acquire cookie requests seen
	AcquireCookiesRequestSeen uint64
	// Number of acq reqs given a NULL parent
	AcquireRequestsWithNullParent uint64
	// Number of acq reqs rejected due to no cache available
	AcquireRequestsRejectedNoCacheAvailable uint64
	// Number of acq reqs succeeded
	AcquireRequestsSucceeded uint64
	// Number of acq reqs rejected due to error
	AcquireRequestsRejectedDueToError uint64
	// Number of acq reqs failed on ENOMEM
	AcquireRequestsFailedDueToEnomem uint64
	// Number of lookup calls made on cache backends
	LookupsNumber uint64
	// Number of negative lookups made
	LookupsNegative uint64
	// Number of positive lookups made
	LookupsPositive uint64
	// Number of objects created by lookup
	ObjectsCreatedByLookup uint64
	// Number of lookups timed out and requeued
	LookupsTimedOutAndRequed uint64
	InvalidationsNumber      uint64
	InvalidationsRunning     uint64
	// Number of update cookie requests seen
	UpdateCookieRequestSeen uint64
	// Number of upd reqs given a NULL parent
	UpdateRequestsWithNullParent uint64
	// Number of upd reqs granted CPU time
	UpdateRequestsRunning uint64
	// Number of relinquish cookie requests seen
	RelinquishCookiesRequestSeen uint64
	// Number of rlq reqs given a NULL parent
	RelinquishCookiesWithNullParent uint64
	// Number of rlq reqs waited on completion of creation
	RelinquishRequestsWaitingCompleteCreation uint64
	// Relinqs rtr
	RelinquishRetries uint64
	// Number of attribute changed requests seen
	AttributeChangedRequestsSeen uint64
	// Number of attr changed requests queued
	AttributeChangedRequestsQueued uint64
	// Number of attr changed rejected -ENOBUFS
	AttributeChangedRejectDueToEnobufs uint64
	// Number of attr changed failed -ENOMEM
	AttributeChangedFailedDueToEnomem uint64
	// Number of attr changed ops given CPU time
	AttributeChangedOps uint64
	// Number of allocation requests seen
	AllocationRequestsSeen uint64
	// Number of successful alloc reqs
	AllocationOkRequests uint64
	// Number of alloc reqs that waited on lookup completion
	AllocationWaitingOnLookup uint64
	// Number of alloc reqs rejected -ENOBUFS
	AllocationsRejectedDueToEnobufs uint64
	// Number of alloc reqs aborted -ERESTARTSYS
	AllocationsAbortedDueToErestartsys uint64
	// Number of alloc reqs submitted
	AllocationOperationsSubmitted uint64
	// Number of alloc reqs waited for CPU time
	AllocationsWaitedForCPU uint64
	// Number of alloc reqs aborted due to object death
	AllocationsAbortedDueToObjectDeath uint64
	// Number of retrieval (read) requests seen
	RetrievalsReadRequests uint64
	// Number of successful retr reqs
	RetrievalsOk uint64
	// Number of retr reqs that waited on lookup completion
	RetrievalsWaitingLookupCompletion uint64
	// Number of retr reqs returned -ENODATA
	RetrievalsReturnedEnodata uint64
	// Number of retr reqs rejected -ENOBUFS
	RetrievalsRejectedDueToEnobufs uint64
	// Number of retr reqs aborted -ERESTARTSYS
	RetrievalsAbortedDueToErestartsys uint64
	// Number of retr reqs failed -ENOMEM
	RetrievalsFailedDueToEnomem uint64
	// Number of retr reqs submitted
	RetrievalsRequests uint64
	// Number of retr reqs waited for CPU time
	RetrievalsWaitingCPU uint64
	// Number of retr reqs aborted due to object death
	RetrievalsAbortedDueToObjectDeath uint64
	// Number of storage (write) requests seen
	StoreWriteRequests uint64
	// Number of successful store reqs
	StoreSuccessfulRequests uint64
	// Number of store reqs on a page already pending storage
	StoreRequestsOnPendingStorage uint64
	// Number of store reqs rejected -ENOBUFS
	StoreRequestsRejectedDueToEnobufs uint64
	// Number of store reqs failed -ENOMEM
	StoreRequestsFailedDueToEnomem uint64
	// Number of store reqs submitted
	StoreRequestsSubmitted uint64
	// Number of store reqs granted CPU time
	StoreRequestsRunning uint64
	// Number of pages given store req processing time
	StorePagesWithRequestsProcessing uint64
	// Number of store reqs deleted from tracking tree
	StoreRequestsDeleted uint64
	// Number of store reqs over store limit
	StoreRequestsOverStoreLimit uint64
	// Number of release reqs against pages with no pending store
	ReleaseRequestsAgainstPagesWithNoPendingStorage uint64
	// Number of release reqs against pages stored by time lock granted
	ReleaseRequestsAgainstPagesStoredByTimeLockGranted uint64
	// Number of release reqs ignored due to in-progress store
	ReleaseRequestsIgnoredDueToInProgressStore uint64
	// Number of page stores cancelled due to release req
	PageStoresCancelledByReleaseRequests uint64
	VmscanWaiting                        uint64
	// Number of times async ops added to pending queues
	OpsPending uint64
	// Number of times async ops given CPU time
	OpsRunning uint64
	// Number of times async ops queued for processing
	OpsEnqueued uint64
	// Number of async ops cancelled
	OpsCancelled uint64
	// Number of async ops rejected due to object lookup/create failure
	OpsRejected uint64
	// Number of async ops initialised
	OpsInitialised uint64
	// Number of async ops queued for deferred release
	OpsDeferred uint64
	// Number of async ops released (should equal ini=N when idle)
	OpsReleased uint64
	// Number of deferred-release async ops garbage collected
	OpsGarbageCollected uint64
	// Number of in-progress alloc_object() cache ops
	CacheopAllocationsinProgress uint64
	// Number of in-progress lookup_object() cache ops
	CacheopLookupObjectInProgress uint64
	// Number of in-progress lookup_complete() cache ops
	CacheopLookupCompleteInPorgress uint64
	// Number of in-progress grab_object() cache ops
	CacheopGrabObjectInProgress uint64
	CacheopInvalidations        uint64
	// Number of in-progress update_object() cache ops
	CacheopUpdateObjectInProgress uint64
	// Number of in-progress drop_object() cache ops
	CacheopDropObjectInProgress uint64
	// Number of in-progress put_object() cache ops
	CacheopPutObjectInProgress uint64
	// Number of in-progress attr_changed() cache ops
	CacheopAttributeChangeInProgress uint64
	// Number of in-progress sync_cache() cache ops
	CacheopSyncCacheInProgress uint64
	// Number of in-progress read_or_alloc_page() cache ops
	CacheopReadOrAllocPageInProgress uint64
	// Number of in-progress read_or_alloc_pages() cache ops
	CacheopReadOrAllocPagesInProgress uint64
	// Number of in-progress allocate_page() cache ops
	CacheopAllocatePageInProgress uint64
	// Number of in-progress allocate_pages() cache ops
	CacheopAllocatePagesInProgress uint64
	// Number of in-progress write_page() cache ops
	CacheopWritePagesInProgress uint64
	// Number of in-progress uncache_page() cache ops
	CacheopUncachePagesInProgress uint64
	// Number of in-progress dissociate_pages() cache ops
	CacheopDissociatePagesInProgress uint64
	// Number of object lookups/creations rejected due to lack of space
	CacheevLookupsAndCreationsRejectedLackSpace uint64
	// Number of stale objects deleted
	CacheevStaleObjectsDeleted uint64
	// Number of objects retired when relinquished
	CacheevRetiredWhenReliquished uint64
	// Number of objects culled
	CacheevObjectsCulled uint64
}

Fscacheinfo represents fscache statistics.

type IPVSBackendStatus

type IPVSBackendStatus struct {
	// The local (virtual) IP address.
	LocalAddress net.IP
	// The remote (real) IP address.
	RemoteAddress net.IP
	// The local (virtual) port.
	LocalPort uint16
	// The remote (real) port.
	RemotePort uint16
	// The local firewall mark
	LocalMark string
	// The transport protocol (TCP, UDP).
	Proto string
	// The current number of active connections for this virtual/real address pair.
	ActiveConn uint64
	// The current number of inactive connections for this virtual/real address pair.
	InactConn uint64
	// The current weight of this virtual/real address pair.
	Weight uint64
}

IPVSBackendStatus holds current metrics of one virtual / real address pair.

type IPVSStats

type IPVSStats struct {
	// Total count of connections.
	Connections uint64
	// Total incoming packages processed.
	IncomingPackets uint64
	// Total outgoing packages processed.
	OutgoingPackets uint64
	// Total incoming traffic.
	IncomingBytes uint64
	// Total outgoing traffic.
	OutgoingBytes uint64
}

IPVSStats holds IPVS statistics, as exposed by the kernel in `/proc/net/ip_vs_stats`.

type InotifyInfo

type InotifyInfo struct {
	// Watch descriptor number
	WD string
	// Inode number
	Ino string
	// Device ID
	Sdev string
	// Mask of events being monitored
	Mask string
}

InotifyInfo represents a single inotify line in the fdinfo file.

type KernelRandom

type KernelRandom struct {
	// EntropyAvaliable gives the available entropy, in bits.
	EntropyAvaliable *uint64
	// PoolSize gives the size of the entropy pool, in bits.
	PoolSize *uint64
	// URandomMinReseedSeconds is the number of seconds after which the DRNG will be reseeded.
	URandomMinReseedSeconds *uint64
	// WriteWakeupThreshold the number of bits of entropy below which we wake up processes
	// that do a select(2) or poll(2) for write access to /dev/random.
	WriteWakeupThreshold *uint64
	// ReadWakeupThreshold is the number of bits of entropy required for waking up processes that sleep
	// waiting for entropy from /dev/random.
	ReadWakeupThreshold *uint64
}

KernelRandom contains information about to the kernel's random number generator.

type LoadAvg

type LoadAvg struct {
	Load1  float64
	Load5  float64
	Load15 float64
}

LoadAvg represents an entry in /proc/loadavg

type MDStat

type MDStat struct {
	// Name of the device.
	Name string
	// activity-state of the device.
	ActivityState string
	// Number of active disks.
	DisksActive int64
	// Total number of disks the device requires.
	DisksTotal int64
	// Number of failed disks.
	DisksFailed int64
	// Spare disks in the device.
	DisksSpare int64
	// Number of blocks the device holds.
	BlocksTotal int64
	// Number of blocks on the device that are in sync.
	BlocksSynced int64
}

MDStat holds info parsed from /proc/mdstat.

type Meminfo

type Meminfo struct {
	// Total usable ram (i.e. physical ram minus a few reserved
	// bits and the kernel binary code)
	MemTotal uint64
	// The sum of LowFree+HighFree
	MemFree uint64
	// An estimate of how much memory is available for starting
	// new applications, without swapping. Calculated from
	// MemFree, SReclaimable, the size of the file LRU lists, and
	// the low watermarks in each zone.  The estimate takes into
	// account that the system needs some page cache to function
	// well, and that not all reclaimable slab will be
	// reclaimable, due to items being in use. The impact of those
	// factors will vary from system to system.
	MemAvailable uint64
	// Relatively temporary storage for raw disk blocks shouldn't
	// get tremendously large (20MB or so)
	Buffers uint64
	Cached  uint64
	// Memory that once was swapped out, is swapped back in but
	// still also is in the swapfile (if memory is needed it
	// doesn't need to be swapped out AGAIN because it is already
	// in the swapfile. This saves I/O)
	SwapCached uint64
	// Memory that has been used more recently and usually not
	// reclaimed unless absolutely necessary.
	Active uint64
	// Memory which has been less recently used.  It is more
	// eligible to be reclaimed for other purposes
	Inactive     uint64
	ActiveAnon   uint64
	InactiveAnon uint64
	ActiveFile   uint64
	InactiveFile uint64
	Unevictable  uint64
	Mlocked      uint64
	// total amount of swap space available
	SwapTotal uint64
	// Memory which has been evicted from RAM, and is temporarily
	// on the disk
	SwapFree uint64
	// Memory which is waiting to get written back to the disk
	Dirty uint64
	// Memory which is actively being written back to the disk
	Writeback uint64
	// Non-file backed pages mapped into userspace page tables
	AnonPages uint64
	// files which have been mapped, such as libraries
	Mapped uint64
	Shmem  uint64
	// in-kernel data structures cache
	Slab uint64
	// Part of Slab, that might be reclaimed, such as caches
	SReclaimable uint64
	// Part of Slab, that cannot be reclaimed on memory pressure
	SUnreclaim  uint64
	KernelStack uint64
	// amount of memory dedicated to the lowest level of page
	// tables.
	PageTables uint64
	// NFS pages sent to the server, but not yet committed to
	// stable storage
	NFSUnstable uint64
	// Memory used for block device "bounce buffers"
	Bounce uint64
	// Memory used by FUSE for temporary writeback buffers
	WritebackTmp uint64
	// Based on the overcommit ratio ('vm.overcommit_ratio'),
	// this is the total amount of  memory currently available to
	// be allocated on the system. This limit is only adhered to
	// if strict overcommit accounting is enabled (mode 2 in
	// 'vm.overcommit_memory').
	// The CommitLimit is calculated with the following formula:
	// CommitLimit = ([total RAM pages] - [total huge TLB pages]) *
	//                overcommit_ratio / 100 + [total swap pages]
	// For example, on a system with 1G of physical RAM and 7G
	// of swap with a `vm.overcommit_ratio` of 30 it would
	// yield a CommitLimit of 7.3G.
	// For more details, see the memory overcommit documentation
	// in vm/overcommit-accounting.
	CommitLimit uint64
	// The amount of memory presently allocated on the system.
	// The committed memory is a sum of all of the memory which
	// has been allocated by processes, even if it has not been
	// "used" by them as of yet. A process which malloc()'s 1G
	// of memory, but only touches 300M of it will show up as
	// using 1G. This 1G is memory which has been "committed" to
	// by the VM and can be used at any time by the allocating
	// application. With strict overcommit enabled on the system
	// (mode 2 in 'vm.overcommit_memory'),allocations which would
	// exceed the CommitLimit (detailed above) will not be permitted.
	// This is useful if one needs to guarantee that processes will
	// not fail due to lack of memory once that memory has been
	// successfully allocated.
	CommittedAS uint64
	// total size of vmalloc memory area
	VmallocTotal uint64
	// amount of vmalloc area which is used
	VmallocUsed uint64
	// largest contiguous block of vmalloc area which is free
	VmallocChunk      uint64
	HardwareCorrupted uint64
	AnonHugePages     uint64
	ShmemHugePages    uint64
	ShmemPmdMapped    uint64
	CmaTotal          uint64
	CmaFree           uint64
	HugePagesTotal    uint64
	HugePagesFree     uint64
	HugePagesRsvd     uint64
	HugePagesSurp     uint64
	Hugepagesize      uint64
	DirectMap4k       uint64
	DirectMap2M       uint64
	DirectMap1G       uint64
}

Meminfo represents memory statistics.

type Mount

type Mount struct {
	// Name of the device.
	Device string
	// The mount point of the device.
	Mount string
	// The filesystem type used by the device.
	Type string
	// If available additional statistics related to this Mount.
	// Use a type assertion to determine if additional statistics are available.
	Stats MountStats
}

A Mount is a device mount parsed from /proc/[pid]/mountstats.

type MountInfo

type MountInfo struct {
	// Unique ID for the mount
	MountID int
	// The ID of the parent mount
	ParentID int
	// The value of `st_dev` for the files on this FS
	MajorMinorVer string
	// The pathname of the directory in the FS that forms
	// the root for this mount
	Root string
	// The pathname of the mount point relative to the root
	MountPoint string
	// Mount options
	Options map[string]string
	// Zero or more optional fields
	OptionalFields map[string]string
	// The Filesystem type
	FSType string
	// FS specific information or "none"
	Source string
	// Superblock options
	SuperOptions map[string]string
}

A MountInfo is a type that describes the details, options for each mount, parsed from /proc/self/mountinfo. The fields described in each entry of /proc/self/mountinfo is described in the following man page. http://man7.org/linux/man-pages/man5/proc.5.html

func GetMounts

func GetMounts() ([]*MountInfo, error)

GetMounts retrieves mountinfo information from `/proc/self/mountinfo`.

func GetProcMounts

func GetProcMounts(pid int) ([]*MountInfo, error)

GetProcMounts retrieves mountinfo information from a processes' `/proc/<pid>/mountinfo`.

type MountStats

type MountStats interface {
	// contains filtered or unexported methods
}

A MountStats is a type which contains detailed statistics for a specific type of Mount.

type MountStatsNFS

type MountStatsNFS struct {
	// The version of statistics provided.
	StatVersion string
	// The mount options of the NFS mount.
	Opts map[string]string
	// The age of the NFS mount.
	Age time.Duration
	// Statistics related to byte counters for various operations.
	Bytes NFSBytesStats
	// Statistics related to various NFS event occurrences.
	Events NFSEventsStats
	// Statistics broken down by filesystem operation.
	Operations []NFSOperationStats
	// Statistics about the NFS RPC transport.
	Transport NFSTransportStats
}

A MountStatsNFS is a MountStats implementation for NFSv3 and v4 mounts.

type NFSBytesStats

type NFSBytesStats struct {
	// Number of bytes read using the read() syscall.
	Read uint64
	// Number of bytes written using the write() syscall.
	Write uint64
	// Number of bytes read using the read() syscall in O_DIRECT mode.
	DirectRead uint64
	// Number of bytes written using the write() syscall in O_DIRECT mode.
	DirectWrite uint64
	// Number of bytes read from the NFS server, in total.
	ReadTotal uint64
	// Number of bytes written to the NFS server, in total.
	WriteTotal uint64
	// Number of pages read directly via mmap()'d files.
	ReadPages uint64
	// Number of pages written directly via mmap()'d files.
	WritePages uint64
}

A NFSBytesStats contains statistics about the number of bytes read and written by an NFS client to and from an NFS server.

type NFSEventsStats

type NFSEventsStats struct {
	// Number of times cached inode attributes are re-validated from the server.
	InodeRevalidate uint64
	// Number of times cached dentry nodes are re-validated from the server.
	DnodeRevalidate uint64
	// Number of times an inode cache is cleared.
	DataInvalidate uint64
	// Number of times cached inode attributes are invalidated.
	AttributeInvalidate uint64
	// Number of times files or directories have been open()'d.
	VFSOpen uint64
	// Number of times a directory lookup has occurred.
	VFSLookup uint64
	// Number of times permissions have been checked.
	VFSAccess uint64
	// Number of updates (and potential writes) to pages.
	VFSUpdatePage uint64
	// Number of pages read directly via mmap()'d files.
	VFSReadPage uint64
	// Number of times a group of pages have been read.
	VFSReadPages uint64
	// Number of pages written directly via mmap()'d files.
	VFSWritePage uint64
	// Number of times a group of pages have been written.
	VFSWritePages uint64
	// Number of times directory entries have been read with getdents().
	VFSGetdents uint64
	// Number of times attributes have been set on inodes.
	VFSSetattr uint64
	// Number of pending writes that have been forcefully flushed to the server.
	VFSFlush uint64
	// Number of times fsync() has been called on directories and files.
	VFSFsync uint64
	// Number of times locking has been attempted on a file.
	VFSLock uint64
	// Number of times files have been closed and released.
	VFSFileRelease uint64
	// Unknown.  Possibly unused.
	CongestionWait uint64
	// Number of times files have been truncated.
	Truncation uint64
	// Number of times a file has been grown due to writes beyond its existing end.
	WriteExtension uint64
	// Number of times a file was removed while still open by another process.
	SillyRename uint64
	// Number of times the NFS server gave less data than expected while reading.
	ShortRead uint64
	// Number of times the NFS server wrote less data than expected while writing.
	ShortWrite uint64
	// Number of times the NFS server indicated EJUKEBOX; retrieving data from
	// offline storage.
	JukeboxDelay uint64
	// Number of NFS v4.1+ pNFS reads.
	PNFSRead uint64
	// Number of NFS v4.1+ pNFS writes.
	PNFSWrite uint64
}

A NFSEventsStats contains statistics about NFS event occurrences.

type NFSOperationStats

type NFSOperationStats struct {
	// The name of the operation.
	Operation string
	// Number of requests performed for this operation.
	Requests uint64
	// Number of times an actual RPC request has been transmitted for this operation.
	Transmissions uint64
	// Number of times a request has had a major timeout.
	MajorTimeouts uint64
	// Number of bytes sent for this operation, including RPC headers and payload.
	BytesSent uint64
	// Number of bytes received for this operation, including RPC headers and payload.
	BytesReceived uint64
	// Duration all requests spent queued for transmission before they were sent.
	CumulativeQueueMilliseconds uint64
	// Duration it took to get a reply back after the request was transmitted.
	CumulativeTotalResponseMilliseconds uint64
	// Duration from when a request was enqueued to when it was completely handled.
	CumulativeTotalRequestMilliseconds uint64
	// The count of operations that complete with tk_status < 0.  These statuses usually indicate error conditions.
	Errors uint64
}

A NFSOperationStats contains statistics for a single operation.

type NFSTransportStats

type NFSTransportStats struct {
	// The transport protocol used for the NFS mount.
	Protocol string
	// The local port used for the NFS mount.
	Port uint64
	// Number of times the client has had to establish a connection from scratch
	// to the NFS server.
	Bind uint64
	// Number of times the client has made a TCP connection to the NFS server.
	Connect uint64
	// Duration (in jiffies, a kernel internal unit of time) the NFS mount has
	// spent waiting for connections to the server to be established.
	ConnectIdleTime uint64
	// Duration since the NFS mount last saw any RPC traffic.
	IdleTimeSeconds uint64
	// Number of RPC requests for this mount sent to the NFS server.
	Sends uint64
	// Number of RPC responses for this mount received from the NFS server.
	Receives uint64
	// Number of times the NFS server sent a response with a transaction ID
	// unknown to this client.
	BadTransactionIDs uint64
	// A running counter, incremented on each request as the current difference
	// ebetween sends and receives.
	CumulativeActiveRequests uint64
	// A running counter, incremented on each request by the current backlog
	// queue size.
	CumulativeBacklog uint64

	// Maximum number of simultaneously active RPC requests ever used.
	MaximumRPCSlotsUsed uint64
	// A running counter, incremented on each request as the current size of the
	// sending queue.
	CumulativeSendingQueue uint64
	// A running counter, incremented on each request as the current size of the
	// pending queue.
	CumulativePendingQueue uint64
}

A NFSTransportStats contains statistics for the NFS mount RPC requests and responses.

type Namespace

type Namespace struct {
	Type  string // Namespace type.
	Inode uint32 // Inode number of the namespace. If two processes are in the same namespace their inodes will match.
}

Namespace represents a single namespace of a process.

type Namespaces

type Namespaces map[string]Namespace

Namespaces contains all of the namespaces that the process is contained in.

type NetDev

type NetDev map[string]NetDevLine

NetDev is parsed from /proc/net/dev or /proc/[pid]/net/dev. The map keys are interface names.

func (NetDev) Total

func (netDev NetDev) Total() NetDevLine

Total aggregates the values across interfaces and returns a new NetDevLine. The Name field will be a sorted comma separated list of interface names.

type NetDevLine

type NetDevLine struct {
	Name         string `json:"name"`          // The name of the interface.
	RxBytes      uint64 `json:"rx_bytes"`      // Cumulative count of bytes received.
	RxPackets    uint64 `json:"rx_packets"`    // Cumulative count of packets received.
	RxErrors     uint64 `json:"rx_errors"`     // Cumulative count of receive errors encountered.
	RxDropped    uint64 `json:"rx_dropped"`    // Cumulative count of packets dropped while receiving.
	RxFIFO       uint64 `json:"rx_fifo"`       // Cumulative count of FIFO buffer errors.
	RxFrame      uint64 `json:"rx_frame"`      // Cumulative count of packet framing errors.
	RxCompressed uint64 `json:"rx_compressed"` // Cumulative count of compressed packets received by the device driver.
	RxMulticast  uint64 `json:"rx_multicast"`  // Cumulative count of multicast frames received by the device driver.
	TxBytes      uint64 `json:"tx_bytes"`      // Cumulative count of bytes transmitted.
	TxPackets    uint64 `json:"tx_packets"`    // Cumulative count of packets transmitted.
	TxErrors     uint64 `json:"tx_errors"`     // Cumulative count of transmit errors encountered.
	TxDropped    uint64 `json:"tx_dropped"`    // Cumulative count of packets dropped while transmitting.
	TxFIFO       uint64 `json:"tx_fifo"`       // Cumulative count of FIFO buffer errors.
	TxCollisions uint64 `json:"tx_collisions"` // Cumulative count of collisions detected on the interface.
	TxCarrier    uint64 `json:"tx_carrier"`    // Cumulative count of carrier losses detected by the device driver.
	TxCompressed uint64 `json:"tx_compressed"` // Cumulative count of compressed packets transmitted by the device driver.
}

NetDevLine is single line parsed from /proc/net/dev or /proc/[pid]/net/dev.

type NetSockstat

type NetSockstat struct {
	// Used is non-nil for IPv4 sockstat results, but nil for IPv6.
	Used      *int
	Protocols []NetSockstatProtocol
}

A NetSockstat contains the output of /proc/net/sockstat{,6} for IPv4 or IPv6, respectively.

type NetSockstatProtocol

type NetSockstatProtocol struct {
	Protocol string
	InUse    int
	Orphan   *int
	TW       *int
	Alloc    *int
	Mem      *int
	Memory   *int
}

A NetSockstatProtocol contains statistics about a given socket protocol. Pointer fields indicate that the value may or may not be present on any given protocol.

type NetUDP

type NetUDP []*netUDPLine

NetUDP represents the contents of /proc/net/udp{,6} file without the header.

type NetUDPSummary

type NetUDPSummary struct {
	// TxQueueLength shows the total queue length of all parsed tx_queue lengths.
	TxQueueLength uint64
	// RxQueueLength shows the total queue length of all parsed rx_queue lengths.
	RxQueueLength uint64
	// UsedSockets shows the total number of parsed lines representing the
	// number of used sockets.
	UsedSockets uint64
}

NetUDPSummary provides already computed values like the total queue lengths or the total number of used sockets. In contrast to NetUDP it does not collect the parsed lines into a slice.

type NetUNIX

type NetUNIX struct {
	Rows []*NetUNIXLine
}

NetUNIX holds the data read from /proc/net/unix.

type NetUNIXFlags

type NetUNIXFlags uint64

NetUNIXFlags is the type of the flags field.

func (NetUNIXFlags) String

func (f NetUNIXFlags) String() string

type NetUNIXLine

type NetUNIXLine struct {
	KernelPtr string
	RefCount  uint64
	Protocol  uint64
	Flags     NetUNIXFlags
	Type      NetUNIXType
	State     NetUNIXState
	Inode     uint64
	Path      string
}

NetUNIXLine represents a line of /proc/net/unix.

type NetUNIXState

type NetUNIXState uint64

NetUNIXState is the type of the state field.

func (NetUNIXState) String

func (s NetUNIXState) String() string

type NetUNIXType

type NetUNIXType uint64

NetUNIXType is the type of the type field.

func (NetUNIXType) String

func (t NetUNIXType) String() string

type PSILine

type PSILine struct {
	Avg10  float64
	Avg60  float64
	Avg300 float64
	Total  uint64
}

PSILine is a single line of values as returned by /proc/pressure/* The Avg entries are averages over n seconds, as a percentage The Total line is in microseconds

type PSIStats

type PSIStats struct {
	Some *PSILine
	Full *PSILine
}

PSIStats represent pressure stall information from /proc/pressure/* Some indicates the share of time in which at least some tasks are stalled Full indicates the share of time in which all non-idle tasks are stalled simultaneously

type Proc

type Proc struct {
	// The process ID.
	PID int
	// contains filtered or unexported fields
}

Proc provides information about a running process.

func NewProc

func NewProc(pid int) (Proc, error)

NewProc returns a process for the given pid under /proc.

func Self

func Self() (Proc, error)

Self returns a process for the current process read via /proc/self.

func (Proc) Cgroups

func (p Proc) Cgroups() ([]Cgroup, error)

Cgroups reads from /proc/<pid>/cgroups and returns a []*Cgroup struct locating this PID in each process control hierarchy running on this system. On every system (v1 and v2), all hierarchies contain all processes, so the len of the returned struct is equal to the number of active hierarchies on this system

func (Proc) CmdLine

func (p Proc) CmdLine() ([]string, error)

CmdLine returns the command line of a process.

func (Proc) Comm

func (p Proc) Comm() (string, error)

Comm returns the command name of a process.

func (Proc) Cwd

func (p Proc) Cwd() (string, error)

Cwd returns the absolute path to the current working directory of the process.

func (Proc) Environ

func (p Proc) Environ() ([]string, error)

Environ reads process environments from /proc/<pid>/environ

func (Proc) Executable

func (p Proc) Executable() (string, error)

Executable returns the absolute path of the executable command of a process.

func (Proc) FDInfo

func (p Proc) FDInfo(fd string) (*ProcFDInfo, error)

FDInfo constructor. On kernels older than 3.8, InotifyInfos will always be empty.

func (Proc) FileDescriptorTargets

func (p Proc) FileDescriptorTargets() ([]string, error)

FileDescriptorTargets returns the targets of all file descriptors of a process. If a file descriptor is not a symlink to a file (like a socket), that value will be the empty string.

func (Proc) FileDescriptors

func (p Proc) FileDescriptors() ([]uintptr, error)

FileDescriptors returns the currently open file descriptors of a process.

func (Proc) FileDescriptorsInfo

func (p Proc) FileDescriptorsInfo() (ProcFDInfos, error)

FileDescriptorsInfo retrieves information about all file descriptors of the process.

func (Proc) FileDescriptorsLen

func (p Proc) FileDescriptorsLen() (int, error)

FileDescriptorsLen returns the number of currently open file descriptors of a process.

func (Proc) IO

func (p Proc) IO() (ProcIO, error)

IO creates a new ProcIO instance from a given Proc instance.

func (Proc) Limits

func (p Proc) Limits() (ProcLimits, error)

Limits returns the current soft limits of the process.

func (Proc) MountInfo

func (p Proc) MountInfo() ([]*MountInfo, error)

MountInfo retrieves mount information for mount points in a process's namespace. It supplies information missing in `/proc/self/mounts` and fixes various other problems with that file too.

func (Proc) MountStats

func (p Proc) MountStats() ([]*Mount, error)

MountStats retrieves statistics and configuration for mount points in a process's namespace.

func (Proc) Namespaces

func (p Proc) Namespaces() (Namespaces, error)

Namespaces reads from /proc/<pid>/ns/* to get the namespaces of which the process is a member.

func (Proc) NetDev

func (p Proc) NetDev() (NetDev, error)

NetDev returns kernel/system statistics read from /proc/[pid]/net/dev.

func (Proc) NewLimits deprecated

func (p Proc) NewLimits() (ProcLimits, error)

NewLimits returns the current soft limits of the process.

Deprecated: use p.Limits() instead

func (Proc) NewStat deprecated

func (p Proc) NewStat() (ProcStat, error)

NewStat returns the current status information of the process.

Deprecated: use p.Stat() instead

func (Proc) NewStatus

func (p Proc) NewStatus() (ProcStatus, error)

NewStatus returns the current status information of the process.

func (Proc) ProcMaps

func (p Proc) ProcMaps() ([]*ProcMap, error)

ProcMaps reads from /proc/[pid]/maps to get the memory-mappings of the process.

func (Proc) ProcSMapsRollup

func (p Proc) ProcSMapsRollup() (ProcSMapsRollup, error)

ProcSMapsRollup reads from /proc/[pid]/smaps_rollup to get summed memory information of the process.

If smaps_rollup does not exists (require kernel >= 4.15), the content of /proc/pid/smaps will we read and summed.

func (Proc) RootDir

func (p Proc) RootDir() (string, error)

RootDir returns the absolute path to the process's root directory (as set by chroot)

func (Proc) Schedstat

func (p Proc) Schedstat() (ProcSchedstat, error)

Schedstat returns task scheduling information for the process.

func (Proc) Stat

func (p Proc) Stat() (ProcStat, error)

Stat returns the current status information of the process.

func (Proc) Wchan

func (p Proc) Wchan() (string, error)

Wchan returns the wchan (wait channel) of a process.

type ProcFDInfo

type ProcFDInfo struct {
	// File descriptor
	FD string
	// File offset
	Pos string
	// File access mode and status flags
	Flags string
	// Mount point ID
	MntID string
	// List of inotify lines (structured) in the fdinfo file (kernel 3.8+ only)
	InotifyInfos []InotifyInfo
}

ProcFDInfo contains represents file descriptor information.

type ProcFDInfos

type ProcFDInfos []ProcFDInfo

ProcFDInfos represents a list of ProcFDInfo structs.

func (ProcFDInfos) InotifyWatchLen

func (p ProcFDInfos) InotifyWatchLen() (int, error)

InotifyWatchLen returns the total number of inotify watches

func (ProcFDInfos) Len

func (p ProcFDInfos) Len() int

func (ProcFDInfos) Less

func (p ProcFDInfos) Less(i, j int) bool

func (ProcFDInfos) Swap

func (p ProcFDInfos) Swap(i, j int)

type ProcIO

type ProcIO struct {
	// Chars read.
	RChar uint64
	// Chars written.
	WChar uint64
	// Read syscalls.
	SyscR uint64
	// Write syscalls.
	SyscW uint64
	// Bytes read.
	ReadBytes uint64
	// Bytes written.
	WriteBytes uint64
	// Bytes written, but taking into account truncation. See
	// Documentation/filesystems/proc.txt in the kernel sources for
	// detailed explanation.
	CancelledWriteBytes int64
}

ProcIO models the content of /proc/<pid>/io.

type ProcLimits

type ProcLimits struct {
	// CPU time limit in seconds.
	CPUTime int64
	// Maximum size of files that the process may create.
	FileSize int64
	// Maximum size of the process's data segment (initialized data,
	// uninitialized data, and heap).
	DataSize int64
	// Maximum size of the process stack in bytes.
	StackSize int64
	// Maximum size of a core file.
	CoreFileSize int64
	// Limit of the process's resident set in pages.
	ResidentSet int64
	// Maximum number of processes that can be created for the real user ID of
	// the calling process.
	Processes int64
	// Value one greater than the maximum file descriptor number that can be
	// opened by this process.
	OpenFiles int64
	// Maximum number of bytes of memory that may be locked into RAM.
	LockedMemory int64
	// Maximum size of the process's virtual memory address space in bytes.
	AddressSpace int64
	// Limit on the combined number of flock(2) locks and fcntl(2) leases that
	// this process may establish.
	FileLocks int64
	// Limit of signals that may be queued for the real user ID of the calling
	// process.
	PendingSignals int64
	// Limit on the number of bytes that can be allocated for POSIX message
	// queues for the real user ID of the calling process.
	MsqqueueSize int64
	// Limit of the nice priority set using setpriority(2) or nice(2).
	NicePriority int64
	// Limit of the real-time priority set using sched_setscheduler(2) or
	// sched_setparam(2).
	RealtimePriority int64
	// Limit (in microseconds) on the amount of CPU time that a process
	// scheduled under a real-time scheduling policy may consume without making
	// a blocking system call.
	RealtimeTimeout int64
}

ProcLimits represents the soft limits for each of the process's resource limits. For more information see getrlimit(2): http://man7.org/linux/man-pages/man2/getrlimit.2.html.

type ProcMap

type ProcMap struct {
	// The start address of current mapping.
	StartAddr uintptr
	// The end address of the current mapping
	EndAddr uintptr
	// The permissions for this mapping
	Perms *ProcMapPermissions
	// The current offset into the file/fd (e.g., shared libs)
	Offset int64
	// Device owner of this mapping (major:minor) in Mkdev format.
	Dev uint64
	// The inode of the device above
	Inode uint64
	// The file or psuedofile (or empty==anonymous)
	Pathname string
}

ProcMap contains the process memory-mappings of the process, read from /proc/[pid]/maps

type ProcMapPermissions

type ProcMapPermissions struct {
	// mapping has the [R]ead flag set
	Read bool
	// mapping has the [W]rite flag set
	Write bool
	// mapping has the [X]ecutable flag set
	Execute bool
	// mapping has the [S]hared flag set
	Shared bool
	// mapping is marked as [P]rivate (copy on write)
	Private bool
}

ProcMapPermissions contains permission settings read from /proc/[pid]/maps

type ProcSMapsRollup

type ProcSMapsRollup struct {
	// Amount of the mapping that is currently resident in RAM
	Rss uint64
	// Process's proportional share of this mapping
	Pss uint64
	// Size in bytes of clean shared pages
	SharedClean uint64
	// Size in bytes of dirty shared pages
	SharedDirty uint64
	// Size in bytes of clean private pages
	PrivateClean uint64
	// Size in bytes of dirty private pages
	PrivateDirty uint64
	// Amount of memory currently marked as referenced or accessed
	Referenced uint64
	// Amount of memory that does not belong to any file
	Anonymous uint64
	// Amount would-be-anonymous memory currently on swap
	Swap uint64
	// Process's proportional memory on swap
	SwapPss uint64
}

type ProcSchedstat

type ProcSchedstat struct {
	RunningNanoseconds uint64
	WaitingNanoseconds uint64
	RunTimeslices      uint64
}

ProcSchedstat contains the values from /proc/<pid>/schedstat

type ProcStat

type ProcStat struct {
	// The process ID.
	PID int
	// The filename of the executable.
	Comm string
	// The process state.
	State string
	// The PID of the parent of this process.
	PPID int
	// The process group ID of the process.
	PGRP int
	// The session ID of the process.
	Session int
	// The controlling terminal of the process.
	TTY int
	// The ID of the foreground process group of the controlling terminal of
	// the process.
	TPGID int
	// The kernel flags word of the process.
	Flags uint
	// The number of minor faults the process has made which have not required
	// loading a memory page from disk.
	MinFlt uint
	// The number of minor faults that the process's waited-for children have
	// made.
	CMinFlt uint
	// The number of major faults the process has made which have required
	// loading a memory page from disk.
	MajFlt uint
	// The number of major faults that the process's waited-for children have
	// made.
	CMajFlt uint
	// Amount of time that this process has been scheduled in user mode,
	// measured in clock ticks.
	UTime uint
	// Amount of time that this process has been scheduled in kernel mode,
	// measured in clock ticks.
	STime uint
	// Amount of time that this process's waited-for children have been
	// scheduled in user mode, measured in clock ticks.
	CUTime uint
	// Amount of time that this process's waited-for children have been
	// scheduled in kernel mode, measured in clock ticks.
	CSTime uint
	// For processes running a real-time scheduling policy, this is the negated
	// scheduling priority, minus one.
	Priority int
	// The nice value, a value in the range 19 (low priority) to -20 (high
	// priority).
	Nice int
	// Number of threads in this process.
	NumThreads int
	// The time the process started after system boot, the value is expressed
	// in clock ticks.
	Starttime uint64
	// Virtual memory size in bytes.
	VSize uint
	// Resident set size in pages.
	RSS int
	// contains filtered or unexported fields
}

ProcStat provides status information about the process, read from /proc/[pid]/stat.

func (ProcStat) CPUTime

func (s ProcStat) CPUTime() float64

CPUTime returns the total CPU user and system time in seconds.

func (ProcStat) ResidentMemory

func (s ProcStat) ResidentMemory() int

ResidentMemory returns the resident memory size in bytes.

func (ProcStat) StartTime

func (s ProcStat) StartTime() (float64, error)

StartTime returns the unix timestamp of the process in seconds.

func (ProcStat) VirtualMemory

func (s ProcStat) VirtualMemory() uint

VirtualMemory returns the virtual memory size in bytes.

type ProcStatus

type ProcStatus struct {
	// The process ID.
	PID int
	// The process name.
	Name string

	// Thread group ID.
	TGID int

	// Peak virtual memory size.
	VmPeak uint64 // nolint:golint
	// Virtual memory size.
	VmSize uint64 // nolint:golint
	// Locked memory size.
	VmLck uint64 // nolint:golint
	// Pinned memory size.
	VmPin uint64 // nolint:golint
	// Peak resident set size.
	VmHWM uint64 // nolint:golint
	// Resident set size (sum of RssAnnon RssFile and RssShmem).
	VmRSS uint64 // nolint:golint
	// Size of resident anonymous memory.
	RssAnon uint64 // nolint:golint
	// Size of resident file mappings.
	RssFile uint64 // nolint:golint
	// Size of resident shared memory.
	RssShmem uint64 // nolint:golint
	// Size of data segments.
	VmData uint64 // nolint:golint
	// Size of stack segments.
	VmStk uint64 // nolint:golint
	// Size of text segments.
	VmExe uint64 // nolint:golint
	// Shared library code size.
	VmLib uint64 // nolint:golint
	// Page table entries size.
	VmPTE uint64 // nolint:golint
	// Size of second-level page tables.
	VmPMD uint64 // nolint:golint
	// Swapped-out virtual memory size by anonymous private.
	VmSwap uint64 // nolint:golint
	// Size of hugetlb memory portions
	HugetlbPages uint64

	// Number of voluntary context switches.
	VoluntaryCtxtSwitches uint64
	// Number of involuntary context switches.
	NonVoluntaryCtxtSwitches uint64

	// UIDs of the process (Real, effective, saved set, and filesystem UIDs)
	UIDs [4]string
	// GIDs of the process (Real, effective, saved set, and filesystem GIDs)
	GIDs [4]string
}

ProcStatus provides status information about the process, read from /proc/[pid]/stat.

func (ProcStatus) TotalCtxtSwitches

func (s ProcStatus) TotalCtxtSwitches() uint64

TotalCtxtSwitches returns the total context switch.

type Procs

type Procs []Proc

Procs represents a list of Proc structs.

func AllProcs

func AllProcs() (Procs, error)

AllProcs returns a list of all currently available processes under /proc.

func (Procs) Len

func (p Procs) Len() int

func (Procs) Less

func (p Procs) Less(i, j int) bool

func (Procs) Swap

func (p Procs) Swap(i, j int)

type Schedstat

type Schedstat struct {
	CPUs []*SchedstatCPU
}

Schedstat contains scheduler statistics from /proc/schedstat

See https://www.kernel.org/doc/Documentation/scheduler/sched-stats.txt for a detailed description of what these numbers mean.

Note the current kernel documentation claims some of the time units are in jiffies when they are actually in nanoseconds since 2.6.23 with the introduction of CFS. A fix to the documentation is pending. See https://lore.kernel.org/patchwork/project/lkml/list/?series=403473

type SchedstatCPU

type SchedstatCPU struct {
	CPUNum string

	RunningNanoseconds uint64
	WaitingNanoseconds uint64
	RunTimeslices      uint64
}

SchedstatCPU contains the values from one "cpu<N>" line

type SoftIRQStat

type SoftIRQStat struct {
	Hi          uint64
	Timer       uint64
	NetTx       uint64
	NetRx       uint64
	Block       uint64
	BlockIoPoll uint64
	Tasklet     uint64
	Sched       uint64
	Hrtimer     uint64
	Rcu         uint64
}

SoftIRQStat represent the softirq statistics as exported in the procfs stat file. A nice introduction can be found at https://0xax.gitbooks.io/linux-insides/content/interrupts/interrupts-9.html It is possible to get per-cpu stats by reading /proc/softirqs

type SoftnetStat

type SoftnetStat struct {
	// Number of processed packets
	Processed uint32
	// Number of dropped packets
	Dropped uint32
	// Number of times processing packets ran out of quota
	TimeSqueezed uint32
}

SoftnetStat contains a single row of data from /proc/net/softnet_stat

type Stat

type Stat struct {
	// Boot time in seconds since the Epoch.
	BootTime uint64
	// Summed up cpu statistics.
	CPUTotal CPUStat
	// Per-CPU statistics.
	CPU []CPUStat
	// Number of times interrupts were handled, which contains numbered and unnumbered IRQs.
	IRQTotal uint64
	// Number of times a numbered IRQ was triggered.
	IRQ []uint64
	// Number of times a context switch happened.
	ContextSwitches uint64
	// Number of times a process was created.
	ProcessCreated uint64
	// Number of processes currently running.
	ProcessesRunning uint64
	// Number of processes currently blocked (waiting for IO).
	ProcessesBlocked uint64
	// Number of times a softirq was scheduled.
	SoftIRQTotal uint64
	// Detailed softirq statistics.
	SoftIRQ SoftIRQStat
}

Stat represents kernel/system statistics.

func NewStat deprecated

func NewStat() (Stat, error)

NewStat returns information about current cpu/process statistics. See https://www.kernel.org/doc/Documentation/filesystems/proc.txt

Deprecated: use fs.Stat() instead

type Swap

type Swap struct {
	Filename string
	Type     string
	Size     int
	Used     int
	Priority int
}

Swap represents an entry in /proc/swaps.

type VM

type VM struct {
	AdminReserveKbytes        *int64   // /proc/sys/vm/admin_reserve_kbytes
	BlockDump                 *int64   // /proc/sys/vm/block_dump
	CompactUnevictableAllowed *int64   // /proc/sys/vm/compact_unevictable_allowed
	DirtyBackgroundBytes      *int64   // /proc/sys/vm/dirty_background_bytes
	DirtyBackgroundRatio      *int64   // /proc/sys/vm/dirty_background_ratio
	DirtyBytes                *int64   // /proc/sys/vm/dirty_bytes
	DirtyExpireCentisecs      *int64   // /proc/sys/vm/dirty_expire_centisecs
	DirtyRatio                *int64   // /proc/sys/vm/dirty_ratio
	DirtytimeExpireSeconds    *int64   // /proc/sys/vm/dirtytime_expire_seconds
	DirtyWritebackCentisecs   *int64   // /proc/sys/vm/dirty_writeback_centisecs
	DropCaches                *int64   // /proc/sys/vm/drop_caches
	ExtfragThreshold          *int64   // /proc/sys/vm/extfrag_threshold
	HugetlbShmGroup           *int64   // /proc/sys/vm/hugetlb_shm_group
	LaptopMode                *int64   // /proc/sys/vm/laptop_mode
	LegacyVaLayout            *int64   // /proc/sys/vm/legacy_va_layout
	LowmemReserveRatio        []*int64 // /proc/sys/vm/lowmem_reserve_ratio
	MaxMapCount               *int64   // /proc/sys/vm/max_map_count
	MemoryFailureEarlyKill    *int64   // /proc/sys/vm/memory_failure_early_kill
	MemoryFailureRecovery     *int64   // /proc/sys/vm/memory_failure_recovery
	MinFreeKbytes             *int64   // /proc/sys/vm/min_free_kbytes
	MinSlabRatio              *int64   // /proc/sys/vm/min_slab_ratio
	MinUnmappedRatio          *int64   // /proc/sys/vm/min_unmapped_ratio
	MmapMinAddr               *int64   // /proc/sys/vm/mmap_min_addr
	NrHugepages               *int64   // /proc/sys/vm/nr_hugepages
	NrHugepagesMempolicy      *int64   // /proc/sys/vm/nr_hugepages_mempolicy
	NrOvercommitHugepages     *int64   // /proc/sys/vm/nr_overcommit_hugepages
	NumaStat                  *int64   // /proc/sys/vm/numa_stat
	NumaZonelistOrder         string   // /proc/sys/vm/numa_zonelist_order
	OomDumpTasks              *int64   // /proc/sys/vm/oom_dump_tasks
	OomKillAllocatingTask     *int64   // /proc/sys/vm/oom_kill_allocating_task
	OvercommitKbytes          *int64   // /proc/sys/vm/overcommit_kbytes
	OvercommitMemory          *int64   // /proc/sys/vm/overcommit_memory
	OvercommitRatio           *int64   // /proc/sys/vm/overcommit_ratio
	PageCluster               *int64   // /proc/sys/vm/page-cluster
	PanicOnOom                *int64   // /proc/sys/vm/panic_on_oom
	PercpuPagelistFraction    *int64   // /proc/sys/vm/percpu_pagelist_fraction
	StatInterval              *int64   // /proc/sys/vm/stat_interval
	Swappiness                *int64   // /proc/sys/vm/swappiness
	UserReserveKbytes         *int64   // /proc/sys/vm/user_reserve_kbytes
	VfsCachePressure          *int64   // /proc/sys/vm/vfs_cache_pressure
	WatermarkBoostFactor      *int64   // /proc/sys/vm/watermark_boost_factor
	WatermarkScaleFactor      *int64   // /proc/sys/vm/watermark_scale_factor
	ZoneReclaimMode           *int64   // /proc/sys/vm/zone_reclaim_mode
}

The VM interface is described at

https://www.kernel.org/doc/Documentation/sysctl/vm.txt

Each setting is exposed as a single file. Each file contains one line with a single numerical value, except lowmem_reserve_ratio which holds an array and numa_zonelist_order (deprecated) which is a string

type XfrmStat

type XfrmStat struct {
	// All errors which are not matched by other
	XfrmInError int
	// No buffer is left
	XfrmInBufferError int
	// Header Error
	XfrmInHdrError int
	// No state found
	// i.e. either inbound SPI, address, or IPSEC protocol at SA is wrong
	XfrmInNoStates int
	// Transformation protocol specific error
	// e.g. SA Key is wrong
	XfrmInStateProtoError int
	// Transformation mode specific error
	XfrmInStateModeError int
	// Sequence error
	// e.g. sequence number is out of window
	XfrmInStateSeqError int
	// State is expired
	XfrmInStateExpired int
	// State has mismatch option
	// e.g. UDP encapsulation type is mismatched
	XfrmInStateMismatch int
	// State is invalid
	XfrmInStateInvalid int
	// No matching template for states
	// e.g. Inbound SAs are correct but SP rule is wrong
	XfrmInTmplMismatch int
	// No policy is found for states
	// e.g. Inbound SAs are correct but no SP is found
	XfrmInNoPols int
	// Policy discards
	XfrmInPolBlock int
	// Policy error
	XfrmInPolError int
	// All errors which are not matched by others
	XfrmOutError int
	// Bundle generation error
	XfrmOutBundleGenError int
	// Bundle check error
	XfrmOutBundleCheckError int
	// No state was found
	XfrmOutNoStates int
	// Transformation protocol specific error
	XfrmOutStateProtoError int
	// Transportation mode specific error
	XfrmOutStateModeError int
	// Sequence error
	// i.e sequence number overflow
	XfrmOutStateSeqError int
	// State is expired
	XfrmOutStateExpired int
	// Policy discads
	XfrmOutPolBlock int
	// Policy is dead
	XfrmOutPolDead int
	// Policy Error
	XfrmOutPolError     int
	XfrmFwdHdrError     int
	XfrmOutStateInvalid int
	XfrmAcquireError    int
}

XfrmStat models the contents of /proc/net/xfrm_stat.

func NewXfrmStat

func NewXfrmStat() (XfrmStat, error)

NewXfrmStat reads the xfrm_stat statistics.

type Zoneinfo

type Zoneinfo struct {
	Node                       string
	Zone                       string
	NrFreePages                *int64
	Min                        *int64
	Low                        *int64
	High                       *int64
	Scanned                    *int64
	Spanned                    *int64
	Present                    *int64
	Managed                    *int64
	NrActiveAnon               *int64
	NrInactiveAnon             *int64
	NrIsolatedAnon             *int64
	NrAnonPages                *int64
	NrAnonTransparentHugepages *int64
	NrActiveFile               *int64
	NrInactiveFile             *int64
	NrIsolatedFile             *int64
	NrFilePages                *int64
	NrSlabReclaimable          *int64
	NrSlabUnreclaimable        *int64
	NrMlockStack               *int64
	NrKernelStack              *int64
	NrMapped                   *int64
	NrDirty                    *int64
	NrWriteback                *int64
	NrUnevictable              *int64
	NrShmem                    *int64
	NrDirtied                  *int64
	NrWritten                  *int64
	NumaHit                    *int64
	NumaMiss                   *int64
	NumaForeign                *int64
	NumaInterleave             *int64
	NumaLocal                  *int64
	NumaOther                  *int64
	Protection                 []*int64
}

Zoneinfo holds info parsed from /proc/zoneinfo.

Directories

Path Synopsis
internal
fs

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