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|
package flamegraph
import (
"bytes"
"encoding/gob"
"fmt"
"io"
"ior/internal/event"
"ior/internal/file"
"ior/internal/flags"
"ior/internal/types"
"iter"
"os"
"strings"
"time"
// Is there a zstd library part of Go 1.25
"github.com/DataDog/zstd"
)
type pathType = string
type traceIdType = types.TraceId
type commType = string
type pidType = uint32
type tidType = uint32
type flagsType = file.Flags
type pathMap map[pathType]map[traceIdType]map[commType]map[pidType]map[tidType]map[flagsType]Counter
// iorData is a structure that holds data related to I/O operations.
// It contains a map of paths, which is used to manage and store path-related information.
type iorData struct {
paths pathMap // paths is a map that stores path-related data. Note: This field is currently unexported.
}
func newIorData() iorData {
return iorData{paths: make(pathMap)}
}
func newIorDataFromFile(filename string) (iorData, error) {
iod := newIorData()
if err := iod.loadFromFile(filename); err != nil {
return iorData{}, err
}
return iod, nil
}
func cloneString(s string) string {
// Clone the string by creating a new string with the same content
// This is a workaround to avoid using unsafe package
return string([]byte(s))
}
func (iod iorData) addEventPair(ev *event.Pair) {
cnt := Counter{Count: 1, Duration: ev.Duration, DurationToPrev: ev.DurationToPrev}
iod.add(ev.FileName(), ev.EnterEv.GetTraceId(), strings.TrimSpace(ev.Comm), ev.EnterEv.GetPid(),
ev.EnterEv.GetTid(), ev.Flags(), cnt)
}
func (iod iorData) add(path pathType, traceId traceIdType, comm commType,
pid pidType, tid tidType, flags flagsType, addCnt Counter) {
pathMap, ok := iod.paths[path]
if !ok {
pathMap = make(map[traceIdType]map[commType]map[pidType]map[tidType]map[flagsType]Counter)
iod.paths[path] = pathMap
}
traceIdMap, ok := iod.paths[path][traceId]
if !ok {
traceIdMap = make(map[commType]map[pidType]map[tidType]map[flagsType]Counter)
iod.paths[path][traceId] = traceIdMap
}
commMap, ok := iod.paths[path][traceId][comm]
if !ok {
commMap = make(map[pidType]map[tidType]map[flagsType]Counter)
iod.paths[path][traceId][comm] = commMap
}
pidMap, ok := iod.paths[path][traceId][comm][pid]
if !ok {
pidMap = make(map[tidType]map[flagsType]Counter)
iod.paths[path][traceId][comm][pid] = pidMap
}
tidMap, ok := iod.paths[path][traceId][comm][pid][tid]
if !ok {
tidMap = make(map[flagsType]Counter)
iod.paths[path][traceId][comm][pid][tid] = tidMap
}
cnt, ok := iod.paths[path][traceId][comm][pid][tid][flags]
if !ok {
iod.paths[path][traceId][comm][pid][tid][flags] = addCnt
} else {
iod.paths[path][traceId][comm][pid][tid][flags] = cnt.add(addCnt)
}
}
func (iod iorData) merge(other iorData) iorData {
for path, traceIdMap := range other.paths {
if _, ok := iod.paths[path]; !ok {
iod.paths[path] = make(map[traceIdType]map[commType]map[pidType]map[tidType]map[flagsType]Counter)
}
for traceId, commMap := range traceIdMap {
if _, ok := iod.paths[path][traceId]; !ok {
iod.paths[path][traceId] = make(map[commType]map[pidType]map[tidType]map[flagsType]Counter)
}
for comm, pidMap := range commMap {
if _, ok := iod.paths[path][traceId][comm]; !ok {
iod.paths[path][traceId][comm] = make(map[pidType]map[tidType]map[flagsType]Counter)
}
for pid, tidMap := range pidMap {
if _, ok := iod.paths[path][traceId][comm][pid]; !ok {
iod.paths[path][traceId][comm][pid] = make(map[tidType]map[flagsType]Counter)
}
for tid, flagsMap := range tidMap {
if _, ok := iod.paths[path][traceId][comm][pid][tid]; !ok {
iod.paths[path][traceId][comm][pid][tid] = make(map[flagsType]Counter)
}
for flags, cnt := range flagsMap {
iod.add(path, traceId, comm, pid, tid, flags, cnt)
}
}
}
}
}
}
return iod
}
func (iod iorData) serializeToFile() error {
hostname, err := os.Hostname()
if err != nil {
panic(err)
}
filename := fmt.Sprintf("%s-%s-%s.ior.zst", hostname, flags.Get().FlamegraphName,
time.Now().Format("2006-01-02_15:04:05"))
fmt.Println("Writing", filename)
tmpFilename := fmt.Sprintf("%s.tmp", filename)
file, err := os.Create(tmpFilename)
if err != nil {
return err
}
defer file.Close()
encoder := zstd.NewWriter(file)
defer encoder.Close()
bytes, err := iod.serialize()
if err != nil {
return err
}
if _, err := encoder.Write(bytes); err != nil {
return err
}
return os.Rename(tmpFilename, filename)
}
func (iod iorData) loadFromFile(filename string) error {
file, err := os.Open(filename)
if err != nil {
return err
}
defer file.Close()
decoder := zstd.NewReader(file)
defer decoder.Close()
var buffer bytes.Buffer
if _, err = io.Copy(&buffer, decoder); err != nil {
return err
}
return iod.deserialize(&buffer)
}
func (iod iorData) serialize() ([]byte, error) {
var buf bytes.Buffer
enc := gob.NewEncoder(&buf)
err := enc.Encode(iod.paths)
return buf.Bytes(), err
}
func (iod *iorData) deserialize(buf *bytes.Buffer) error {
dec := gob.NewDecoder(buf)
return dec.Decode(&iod.paths)
}
// Record returned by the iterator
type iterRecord struct {
path pathType
traceId traceIdType
comm commType
pid pidType
tid tidType
flags flagsType
cnt Counter
}
func (ir iterRecord) StringByName(name string) string {
switch name {
case "path":
return strings.Join(strings.Split(ir.path, "/"), ";/")
case "comm":
return ir.comm
case "tracepoint":
return ir.traceId.String()
case "pid":
return fmt.Sprint(ir.pid)
case "tid":
return fmt.Sprint(ir.tid)
case "flags":
return ir.flags.String()
default:
panic(fmt.Sprintln("No", name, "in record"))
}
}
func (iod iorData) iter() iter.Seq[iterRecord] {
return func(yield func(iterRecord) bool) {
for path, traceIdMap := range iod.paths {
for traceId, commMap := range traceIdMap {
for comm, pidMap := range commMap {
for pid, tidMap := range pidMap {
for tid, flagsMap := range tidMap {
for flags, cnt := range flagsMap {
record := iterRecord{
path: path,
traceId: traceId,
comm: comm,
pid: pid,
tid: tid,
flags: flags,
cnt: cnt,
}
if !yield(record) {
// Stop iteration if yield returns false
return
}
}
}
}
}
}
}
}
}
|
