/
main.go
138 lines (124 loc) · 3.09 KB
/
main.go
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// Copyright 2015 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Command perfdump prints the raw contents of a perf.data profile.
package main
import (
"flag"
"fmt"
"log"
"os"
"reflect"
"github.com/aclements/go-perf/perffile"
)
func main() {
var (
flagInput = flag.String("i", "perf.data", "input perf.data `file`")
flagOrder = flag.String("order", "time", "sort `order`; one of: file, time, causal")
)
flag.Parse()
order, ok := parseOrder(*flagOrder)
if flag.NArg() > 0 || !ok {
flag.Usage()
os.Exit(1)
}
f, err := perffile.Open(*flagInput)
if err != nil {
log.Fatal(err)
}
defer f.Close()
fmt.Printf("events:\n")
for _, event := range f.Events {
fmt.Printf(" %p=%+v\n", event, *event)
}
if f.Meta.BuildIDs != nil {
fmt.Printf("build IDs:\n")
for _, bid := range f.Meta.BuildIDs {
fmt.Printf(" %v\n", bid)
}
}
for _, hdr := range []struct {
label string
val interface{}
}{
//{"build IDs", &f.Meta.BuildIDs},
{"hostname", f.Meta.Hostname},
{"OS release", f.Meta.OSRelease},
{"version", f.Meta.Version},
{"arch", f.Meta.Arch},
{"CPUs online", f.Meta.CPUsOnline},
{"CPUs available", f.Meta.CPUsAvail},
{"CPU desc", f.Meta.CPUDesc},
{"CPUID", f.Meta.CPUID},
{"total memory", f.Meta.TotalMem},
{"cmdline", f.Meta.CmdLine},
{"core groups", f.Meta.CoreGroups},
{"thread groups", f.Meta.ThreadGroups},
{"NUMA nodes", f.Meta.NUMANodes},
{"PMU mappings", f.Meta.PMUMappings},
{"groups", f.Meta.Groups},
} {
if hdr.val == reflect.Zero(reflect.ValueOf(hdr.val).Type()) {
continue
}
fmt.Printf("%s: %v\n", hdr.label, hdr.val)
}
fmt.Println()
rs := f.Records(order)
for rs.Next() {
fmt.Printf("%v{\n", rs.Record.Type())
switch r := rs.Record.(type) {
case *perffile.RecordSample:
v := reflect.ValueOf(r).Elem()
for _, n := range r.Fields() {
f := v.FieldByName(n)
fmt.Printf("\t%s,\n", fmtVal(n, f))
}
default:
printFields(reflect.ValueOf(r))
}
fmt.Printf("}\n")
//fmt.Printf("%v %+v\n", rs.Record.Type(), rs.Record)
}
if err := rs.Err(); err != nil {
log.Fatal(err)
}
}
func parseOrder(order string) (perffile.RecordsOrder, bool) {
switch order {
case "file":
return perffile.RecordsFileOrder, true
case "time":
return perffile.RecordsTimeOrder, true
case "causal":
return perffile.RecordsCausalOrder, true
}
return 0, false
}
func printFields(v reflect.Value) {
for v.Kind() == reflect.Ptr {
v = v.Elem()
}
t := v.Type()
for i := 0; i < t.NumField(); i++ {
info := t.Field(i)
f := v.Field(i)
if info.Anonymous {
printFields(f)
} else if (f.Kind() == reflect.Ptr || f.Kind() == reflect.Slice) && f.IsNil() {
// Skip
} else {
fmt.Printf("\t%s,\n", fmtVal(info.Name, f))
}
}
}
func fmtVal(name string, v reflect.Value) string {
if v.Kind() == reflect.Ptr {
return fmt.Sprintf("%-14s %p", name+":", v.Interface())
}
switch name {
case "IP", "Addr", "Callchain":
return fmt.Sprintf("%-14s %#x", name+":", v.Interface())
}
return fmt.Sprintf("%-14s %+v", name+":", v.Interface())
}