dmesg

Documentation

Index

• Constants
• func HasEDACCorrectableErrors(line string) bool
• func HasOOM(line string) bool
• func HasOOMCgroup(line string) bool
• func HasOOMKillConstraint(line string) bool
• func HasOOMKiller(line string) bool
• func Match(line string) (name string, message string)

Constants

const (
	// e.g.,
	// Out of memory: Killed process 123, UID 48, (httpd).
	// [...] Out of memory: Killed process 123, UID 48, (httpd).
	//
	// NOTE: this is often followed by a line like:
	// [Sun Dec  8 09:23:39 2024] oom_reaper: reaped process 345646 (vector), now anon-rss:0kB, file-rss:0kB, shmem-rss:0
	// (to reap the memory used by the OOM victim)
	EventOOM = "memory_oom"
	RegexOOM = `Out of memory:`

	// e.g.,
	// oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),
	// [...] oom-kill:constraint=CONSTRAINT_MEMCG,nodemask=(null),
	EventOOMKillConstraint = "memory_oom_kill_constraint"
	RegexOOMKillConstraint = `oom-kill:constraint=`

	// e.g.,
	// postgres invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
	// [...] postgres invoked oom-killer: gfp_mask=0x201d2, order=0, oomkilladj=0
	EventOOMKiller = "memory_oom_killer"
	RegexOOMKiller = `(?i)\b(invoked|triggered) oom-killer\b`

	// e.g.,
	// Memory cgroup out of memory: Killed process 123, UID 48, (httpd).
	// [...] Memory cgroup out of memory: Killed process 123, UID 48, (httpd).
	EventOOMCgroup = "memory_oom_cgroup"
	RegexOOMCgroup = `Memory cgroup out of memory`

	// May indicate that Dual Inline Memory Module (DIMM) is beginning to fail.
	//
	// e.g.,
	// [...] EDAC MC0: 1 CE memory read error
	// [...] EDAC MC1: 128 CE memory read error on CPU_SrcID#1_Ha#0_Chan#1_DIMM#1
	//
	// ref.
	// https://serverfault.com/questions/682909/how-to-find-faulty-memory-module-from-mce-message
	// https://github.com/Azure/azurehpc/blob/2d57191cb35ed638525ba9424cc2aa1b5abe1c05/experimental/aks_npd_draino/npd/deployment/node-problem-detector-config.yaml#L51C20-L51C40
	EventEDACCorrectableErrors = "memory_edac_correctable_errors"
	RegexEDACCorrectableErrors = `.*CE memory read error.*`
)

Functions

func HasEDACCorrectableErrors

func HasEDACCorrectableErrors(line string) bool

func HasOOM

func HasOOM(line string) bool

Returns true if the line indicates that the file-max limit has been reached. ref. https://docs.kernel.org/admin-guide/sysctl/fs.html#file-max-file-nr

func HasOOMCgroup

func HasOOMCgroup(line string) bool

func HasOOMKillConstraint

func HasOOMKillConstraint(line string) bool

func HasOOMKiller

func HasOOMKiller(line string) bool

func Match

func Match(line string) (name string, message string)