profile

Documentation

Overview

Implements methods to filter samples from profiles.

Package profile provides a representation of profile.proto and methods to encode/decode profiles in this format.

Index

• Variables
• type Demangler
• type Function
• type Label
• type Line
• type Location
• type Mapping
• type Profile
  • func Parse(r io.Reader) (*Profile, error)
  • func ParseTracebacks(b []byte) (*Profile, error)
  • func (p *Profile) Aggregate(inlineFrame, function, filename, linenumber, address bool) error
  • func (p *Profile) CheckValid() error
  • func (p *Profile) Compatible(pb *Profile) error
  • func (p *Profile) Copy() *Profile
  • func (p *Profile) Demangle(d Demangler) error
  • func (p *Profile) FilterSamplesByName(focus, ignore, hide *regexp.Regexp) (fm, im, hm bool)
  • func (p *Profile) FilterSamplesByTag(focus, ignore TagMatch) (fm, im bool)
  • func (p *Profile) HasFileLines() bool
  • func (p *Profile) HasFunctions() bool
  • func (p *Profile) Merge(pb *Profile, r float64) error
  • func (p *Profile) ParseMemoryMap(rd io.Reader) error
  • func (p *Profile) Prune(dropRx, keepRx *regexp.Regexp)
  • func (p *Profile) RemoveUninteresting() error
  • func (p *Profile) String() string
  • func (p *Profile) Write(w io.Writer) error
• type Sample
• type TagMatch
• type ValueType

Variables

var (

	// LegacyHeapAllocated instructs the heapz parsers to use the
	// allocated memory stats instead of the default in-use memory. Note
	// that tcmalloc doesn't provide all allocated memory, only in-use
	// stats.
	LegacyHeapAllocated bool
)

Types

type Demangler

type Demangler func(name []string) (map[string]string, error)

Demangler maps symbol names to a human-readable form. This may include C++ demangling and additional simplification. Names that are not demangled may be missing from the resulting map.

type Function

type Function struct {
	ID         uint64
	Name       string
	SystemName string
	Filename   string
	StartLine  int64
	// contains filtered or unexported fields
}

Function corresponds to Profile.Function

type Label

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

Label corresponds to Profile.Label

type Line

type Line struct {
	Function *Function
	Line     int64
	// contains filtered or unexported fields
}

Line corresponds to Profile.Line

type Location

type Location struct {
	ID      uint64
	Mapping *Mapping
	Address uint64
	Line    []Line
	// contains filtered or unexported fields
}

Location corresponds to Profile.Location

type Mapping

type Mapping struct {
	ID              uint64
	Start           uint64
	Limit           uint64
	Offset          uint64
	File            string
	BuildID         string
	HasFunctions    bool
	HasFilenames    bool
	HasLineNumbers  bool
	HasInlineFrames bool
	// contains filtered or unexported fields
}

Mapping corresponds to Profile.Mapping

type Profile

type Profile struct {
	SampleType []*ValueType
	Sample     []*Sample
	Mapping    []*Mapping
	Location   []*Location
	Function   []*Function

	DropFrames string
	KeepFrames string

	TimeNanos     int64
	DurationNanos int64
	PeriodType    *ValueType
	Period        int64
	// contains filtered or unexported fields
}

Profile is an in-memory representation of profile.proto.

func Parse

func Parse(r io.Reader) (*Profile, error)

Parse parses a profile and checks for its validity. The input may be a gzip-compressed encoded protobuf or one of many legacy profile formats which may be unsupported in the future.

func ParseTracebacks

func ParseTracebacks(b []byte) (*Profile, error)

ParseTracebacks parses a set of tracebacks and returns a newly populated profile. It will accept any text file and generate a Profile out of it with any hex addresses it can identify, including a process map if it can recognize one. Each sample will include a tag "source" with the addresses recognized in string format.

func (*Profile) Aggregate

func (p *Profile) Aggregate(inlineFrame, function, filename, linenumber, address bool) error

Aggregate merges the locations in the profile into equivalence classes preserving the request attributes. It also updates the samples to point to the merged locations.

func (*Profile) CheckValid

func (p *Profile) CheckValid() error

CheckValid tests whether the profile is valid. Checks include, but are not limited to:

• len(Profile.Sample[n].value) == len(Profile.value_unit)
• Sample.id has a corresponding Profile.Location

func (*Profile) Compatible

func (p *Profile) Compatible(pb *Profile) error

Compatible determines if two profiles can be compared/merged. returns nil if the profiles are compatible; otherwise an error with details on the incompatibility.

func (*Profile) Copy

func (p *Profile) Copy() *Profile

Copy makes a fully independent copy of a profile.

func (*Profile) Demangle

func (p *Profile) Demangle(d Demangler) error

Demangle attempts to demangle and optionally simplify any function names referenced in the profile. It works on a best-effort basis: it will silently preserve the original names in case of any errors.

func (*Profile) FilterSamplesByName

func (p *Profile) FilterSamplesByName(focus, ignore, hide *regexp.Regexp) (fm, im, hm bool)

FilterSamplesByName filters the samples in a profile and only keeps samples where at least one frame matches focus but none match ignore. Returns true is the corresponding regexp matched at least one sample.

func (*Profile) FilterSamplesByTag

func (p *Profile) FilterSamplesByTag(focus, ignore TagMatch) (fm, im bool)

FilterSamplesByTag removes all samples from the profile, except those that match focus and do not match the ignore regular expression.

func (*Profile) HasFileLines

func (p *Profile) HasFileLines() bool

HasFileLines determines if all locations in this profile have symbolized file and line number information.

func (*Profile) HasFunctions

func (p *Profile) HasFunctions() bool

HasFunctions determines if all locations in this profile have symbolized function information.

func (*Profile) Merge

func (p *Profile) Merge(pb *Profile, r float64) error

Merge adds profile p adjusted by ratio r into profile p. Profiles must be compatible (same Type and SampleType). TODO(rsilvera): consider normalizing the profiles based on the total samples collected.

func (*Profile) ParseMemoryMap

func (p *Profile) ParseMemoryMap(rd io.Reader) error

ParseMemoryMap parses a memory map in the format of /proc/self/maps, and overrides the mappings in the current profile. It renumbers the samples and locations in the profile correspondingly.

func (*Profile) Prune

func (p *Profile) Prune(dropRx, keepRx *regexp.Regexp)

Prune removes all nodes beneath a node matching dropRx, and not matching keepRx. If the root node of a Sample matches, the sample will have an empty stack.

func (*Profile) RemoveUninteresting

func (p *Profile) RemoveUninteresting() error

RemoveUninteresting prunes and elides profiles using built-in tables of uninteresting function names.

func (*Profile) String

func (p *Profile) String() string

Print dumps a text representation of a profile. Intended mainly for debugging purposes.

func (*Profile) Write

func (p *Profile) Write(w io.Writer) error

Write writes the profile as a gzip-compressed marshaled protobuf.

type Sample

type Sample struct {
	Location []*Location
	Value    []int64
	Label    map[string][]string
	NumLabel map[string][]int64
	// contains filtered or unexported fields
}

Sample corresponds to Profile.Sample

type TagMatch

type TagMatch func(key, val string, nval int64) bool

TagMatch selects tags for filtering

type ValueType

type ValueType struct {
	Type string // cpu, wall, inuse_space, etc
	Unit string // seconds, nanoseconds, bytes, etc
	// contains filtered or unexported fields
}

ValueType corresponds to Profile.ValueType