func (b *builder) tagGroupLabel(g []*Tag) (label string, flat, cum int64) {
formatTag := b.config.FormatTag
if formatTag == nil {
formatTag = measurement.Label
}
if len(g) == 1 {
t := g[0]
return formatTag(t.Value, t.Unit), t.FlatValue(), t.CumValue()
}
min := g[0]
max := g[0]
df, f := min.FlatDiv, min.Flat
dc, c := min.CumDiv, min.Cum
for _, t := range g[1:] {
if v, _ := measurement.Scale(t.Value, t.Unit, min.Unit); int64(v) < min.Value {
min = t
}
if v, _ := measurement.Scale(t.Value, t.Unit, max.Unit); int64(v) > max.Value {
max = t
}
f += t.Flat
df += t.FlatDiv
c += t.Cum
dc += t.CumDiv
}
if df != 0 {
f = f / df
}
if dc != 0 {
c = c / dc
}
return formatTag(min.Value, min.Unit) + ".." + formatTag(max.Value, max.Unit), f, c
}
// printCallgrind prints a graph for a profile on callgrind format.
func printCallgrind(w io.Writer, rpt *Report) error {
o := rpt.options
rpt.options.NodeFraction = 0
rpt.options.EdgeFraction = 0
rpt.options.NodeCount = 0
g, _, _, _ := rpt.newTrimmedGraph()
rpt.selectOutputUnit(g)
fmt.Fprintln(w, "events:", o.SampleType+"("+o.OutputUnit+")")
files := make(map[string]int)
names := make(map[string]int)
for _, n := range g.Nodes {
fmt.Fprintln(w, "fl="+callgrindName(files, n.Info.File))
fmt.Fprintln(w, "fn="+callgrindName(names, n.Info.Name))
sv, _ := measurement.Scale(n.Flat, o.SampleUnit, o.OutputUnit)
fmt.Fprintf(w, "%d %d\n", n.Info.Lineno, int64(sv))
// Print outgoing edges.
for _, out := range n.Out.Sort() {
c, _ := measurement.Scale(out.Weight, o.SampleUnit, o.OutputUnit)
callee := out.Dest
fmt.Fprintln(w, "cfl="+callgrindName(files, callee.Info.File))
fmt.Fprintln(w, "cfn="+callgrindName(names, callee.Info.Name))
// pprof doesn't have a flat weight for a call, leave as 0.
fmt.Fprintln(w, "calls=0", callee.Info.Lineno)
fmt.Fprintln(w, n.Info.Lineno, int64(c))
}
fmt.Fprintln(w)
}
return nil
}
// printCallgrind prints a graph for a profile on callgrind format.
func printCallgrind(w io.Writer, rpt *Report) error {
o := rpt.options
rpt.options.NodeFraction = 0
rpt.options.EdgeFraction = 0
rpt.options.NodeCount = 0
g, _, _, _ := rpt.newTrimmedGraph()
rpt.selectOutputUnit(g)
nodeNames := getDisambiguatedNames(g)
fmt.Fprintln(w, "positions: instr line")
fmt.Fprintln(w, "events:", o.SampleType+"("+o.OutputUnit+")")
objfiles := make(map[string]int)
files := make(map[string]int)
names := make(map[string]int)
// prevInfo points to the previous NodeInfo.
// It is used to group cost lines together as much as possible.
var prevInfo *graph.NodeInfo
for _, n := range g.Nodes {
if prevInfo == nil || n.Info.Objfile != prevInfo.Objfile || n.Info.File != prevInfo.File || n.Info.Name != prevInfo.Name {
fmt.Fprintln(w)
fmt.Fprintln(w, "ob="+callgrindName(objfiles, n.Info.Objfile))
fmt.Fprintln(w, "fl="+callgrindName(files, n.Info.File))
fmt.Fprintln(w, "fn="+callgrindName(names, n.Info.Name))
}
addr := callgrindAddress(prevInfo, n.Info.Address)
sv, _ := measurement.Scale(n.FlatValue(), o.SampleUnit, o.OutputUnit)
fmt.Fprintf(w, "%s %d %d\n", addr, n.Info.Lineno, int64(sv))
// Print outgoing edges.
for _, out := range n.Out.Sort() {
c, _ := measurement.Scale(out.Weight, o.SampleUnit, o.OutputUnit)
callee := out.Dest
fmt.Fprintln(w, "cfl="+callgrindName(files, callee.Info.File))
fmt.Fprintln(w, "cfn="+callgrindName(names, nodeNames[callee]))
// pprof doesn't have a flat weight for a call, leave as 0.
fmt.Fprintf(w, "calls=0 %s %d\n", callgrindAddress(prevInfo, callee.Info.Address), callee.Info.Lineno)
// TODO: This address may be in the middle of a call
// instruction. It would be best to find the beginning
// of the instruction, but the tools seem to handle
// this OK.
fmt.Fprintf(w, "* * %d\n", int64(c))
}
prevInfo = &n.Info
}
return nil
}
func printTopProto(w io.Writer, rpt *Report) error {
p := rpt.prof
o := rpt.options
g, _, _, _ := rpt.newTrimmedGraph()
rpt.selectOutputUnit(g)
out := profile.Profile{
SampleType: []*profile.ValueType{
{Type: "cum", Unit: o.OutputUnit},
{Type: "flat", Unit: o.OutputUnit},
},
TimeNanos: p.TimeNanos,
DurationNanos: p.DurationNanos,
PeriodType: p.PeriodType,
Period: p.Period,
}
var flatSum int64
for i, n := range g.Nodes {
name, flat, cum := n.Info.PrintableName(), n.Flat, n.Cum
flatSum += flat
f := &profile.Function{
ID: uint64(i + 1),
Name: name,
SystemName: name,
}
l := &profile.Location{
ID: uint64(i + 1),
Line: []profile.Line{
{
Function: f,
},
},
}
fv, _ := measurement.Scale(flat, o.SampleUnit, o.OutputUnit)
cv, _ := measurement.Scale(cum, o.SampleUnit, o.OutputUnit)
s := &profile.Sample{
Location: []*profile.Location{l},
Value: []int64{int64(cv), int64(fv)},
}
out.Function = append(out.Function, f)
out.Location = append(out.Location, l)
out.Sample = append(out.Sample, s)
}
return out.Write(w)
}
// ProfileLabels returns printable labels for a profile.
func ProfileLabels(rpt *Report) []string {
label := []string{}
prof := rpt.prof
o := rpt.options
if len(prof.Mapping) > 0 {
if prof.Mapping[0].File != "" {
label = append(label, "File: "+filepath.Base(prof.Mapping[0].File))
}
if prof.Mapping[0].BuildID != "" {
label = append(label, "Build ID: "+prof.Mapping[0].BuildID)
}
}
label = append(label, prof.Comments...)
if o.SampleType != "" {
label = append(label, "Type: "+o.SampleType)
}
if prof.TimeNanos != 0 {
const layout = "Jan 2, 2006 at 3:04pm (MST)"
label = append(label, "Time: "+time.Unix(0, prof.TimeNanos).Format(layout))
}
if prof.DurationNanos != 0 {
duration := measurement.Label(prof.DurationNanos, "nanoseconds")
totalNanos, totalUnit := measurement.Scale(rpt.total, o.SampleUnit, "nanoseconds")
var ratio string
if totalUnit == "ns" && totalNanos != 0 {
ratio = "(" + percentage(int64(totalNanos), prof.DurationNanos) + ")"
}
label = append(label, fmt.Sprintf("Duration: %s, Total samples = %s %s", duration, rpt.formatValue(rpt.total), ratio))
}
return label
}
func tagDistance(t, u *Tag) float64 {
v, _ := measurement.Scale(u.Value, u.Unit, t.Unit)
if v < float64(t.Value) {
return float64(t.Value) - v
}
return v - float64(t.Value)
}
func (rpt *Report) selectOutputUnit(g *graph.Graph) {
o := rpt.options
// Select best unit for profile output.
// Find the appropriate units for the smallest non-zero sample
if o.OutputUnit != "minimum" || len(g.Nodes) == 0 {
return
}
var minValue int64
for _, n := range g.Nodes {
nodeMin := abs64(n.Flat)
if nodeMin == 0 {
nodeMin = abs64(n.Cum)
}
if nodeMin > 0 && (minValue == 0 || nodeMin < minValue) {
minValue = nodeMin
}
}
maxValue := rpt.total
if minValue == 0 {
minValue = maxValue
}
if r := o.Ratio; r > 0 && r != 1 {
minValue = int64(float64(minValue) * r)
maxValue = int64(float64(maxValue) * r)
}
_, minUnit := measurement.Scale(minValue, o.SampleUnit, "minimum")
_, maxUnit := measurement.Scale(maxValue, o.SampleUnit, "minimum")
unit := minUnit
if minUnit != maxUnit && minValue*100 < maxValue && o.OutputFormat != Callgrind {
// Minimum and maximum values have different units. Scale
// minimum by 100 to use larger units, allowing minimum value to
// be scaled down to 0.01, except for callgrind reports since
// they can only represent integer values.
_, unit = measurement.Scale(100*minValue, o.SampleUnit, "minimum")
}
if unit != "" {
o.OutputUnit = unit
} else {
o.OutputUnit = o.SampleUnit
}
}
func tagGroupLabel(g []*Tag) (label string, flat, cum int64) {
if len(g) == 1 {
t := g[0]
return measurement.Label(t.Value, t.Unit), t.Flat, t.Cum
}
min := g[0]
max := g[0]
f := min.Flat
c := min.Cum
for _, t := range g[1:] {
if v, _ := measurement.Scale(t.Value, t.Unit, min.Unit); int64(v) < min.Value {
min = t
}
if v, _ := measurement.Scale(t.Value, t.Unit, max.Unit); int64(v) > max.Value {
max = t
}
f += t.Flat
c += t.Cum
}
return measurement.Label(min.Value, min.Unit) + ".." + measurement.Label(max.Value, max.Unit), f, c
}
// parseTagFilterRange returns a function to checks if a value is
// contained on the range described by a string. It can recognize
// strings of the form:
// "32kb" -- matches values == 32kb
// ":64kb" -- matches values <= 64kb
// "4mb:" -- matches values >= 4mb
// "12kb:64mb" -- matches values between 12kb and 64mb (both included).
func parseTagFilterRange(filter string) func(int64, string) bool {
ranges := tagFilterRangeRx.FindAllStringSubmatch(filter, 2)
if len(ranges) == 0 {
return nil // No ranges were identified
}
v, err := strconv.ParseInt(ranges[0][1], 10, 64)
if err != nil {
panic(fmt.Errorf("Failed to parse int %s: %v", ranges[0][1], err))
}
scaledValue, unit := measurement.Scale(v, ranges[0][2], ranges[0][2])
if len(ranges) == 1 {
switch match := ranges[0][0]; filter {
case match:
return func(v int64, u string) bool {
sv, su := measurement.Scale(v, u, unit)
return su == unit && sv == scaledValue
}
case match + ":":
return func(v int64, u string) bool {
sv, su := measurement.Scale(v, u, unit)
return su == unit && sv >= scaledValue
}
case ":" + match:
return func(v int64, u string) bool {
sv, su := measurement.Scale(v, u, unit)
return su == unit && sv <= scaledValue
}
}
return nil
}
if filter != ranges[0][0]+":"+ranges[1][0] {
return nil
}
if v, err = strconv.ParseInt(ranges[1][1], 10, 64); err != nil {
panic(fmt.Errorf("Failed to parse int %s: %v", ranges[1][1], err))
}
scaledValue2, unit2 := measurement.Scale(v, ranges[1][2], unit)
if unit != unit2 {
return nil
}
return func(v int64, u string) bool {
sv, su := measurement.Scale(v, u, unit)
return su == unit && sv >= scaledValue && sv <= scaledValue2
}
}
