/
service.go
138 lines (123 loc) · 3.13 KB
/
service.go
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package oppprof
import (
"context"
"io"
"net"
"net/http"
httpPprof "net/http/pprof"
"os"
"path/filepath"
"runtime"
"runtime/pprof"
"strconv"
"github.com/ethereum-optimism/optimism/op-service/httputil"
"github.com/ethereum/go-ethereum/log"
)
type Service struct {
listenEnabled bool
listenAddr string
listenPort int
profileType string
profileDir string
profileFilename string
cpuFile io.Closer
httpServer *httputil.HTTPServer
}
func New(listenEnabled bool, listenAddr string, listenPort int, profType profileType, profileDir, profileFilename string) *Service {
return &Service{
listenEnabled: listenEnabled,
listenAddr: listenAddr,
listenPort: listenPort,
profileType: string(profType),
profileDir: profileDir,
profileFilename: profileFilename,
}
}
func (s *Service) Start() error {
switch s.profileType {
case "cpu":
if err := s.startCPUProfile(); err != nil {
return err
}
case "block":
runtime.SetBlockProfileRate(1)
case "mutex":
runtime.SetMutexProfileFraction(1)
}
if s.listenEnabled {
if err := s.startServer(); err != nil {
return err
}
}
if s.profileType != "" {
log.Info("start profiling to file", "profile_type", s.profileType, "profile_filepath", s.buildTargetFilePath())
}
return nil
}
func (s *Service) Stop(ctx context.Context) error {
switch s.profileType {
case "cpu":
pprof.StopCPUProfile()
if s.cpuFile != nil {
if err := s.cpuFile.Close(); err != nil {
return err
}
}
case "heap":
runtime.GC()
fallthrough
default:
profile := pprof.Lookup(s.profileType)
if profile == nil {
break
}
filepath := s.buildTargetFilePath()
log.Info("saving profile info", "profile_type", s.profileType, "profile_filepath", s.buildTargetFilePath())
f, err := os.Create(filepath)
if err != nil {
return err
}
defer f.Close()
_ = profile.WriteTo(f, 0)
}
if s.httpServer != nil {
if err := s.httpServer.Stop(ctx); err != nil {
return err
}
}
return nil
}
func (s *Service) startServer() error {
log.Debug("starting pprof server", "addr", net.JoinHostPort(s.listenAddr, strconv.Itoa(s.listenPort)))
mux := http.NewServeMux()
// have to do below to support multiple servers, since the
// pprof import only uses DefaultServeMux
mux.Handle("/debug/pprof/", http.HandlerFunc(httpPprof.Index))
mux.Handle("/debug/pprof/profile", http.HandlerFunc(httpPprof.Profile))
mux.Handle("/debug/pprof/symbol", http.HandlerFunc(httpPprof.Symbol))
mux.Handle("/debug/pprof/trace", http.HandlerFunc(httpPprof.Trace))
addr := net.JoinHostPort(s.listenAddr, strconv.Itoa(s.listenPort))
var err error
s.httpServer, err = httputil.StartHTTPServer(addr, mux)
if err != nil {
return err
}
log.Info("started pprof server", "addr", s.httpServer.Addr())
return nil
}
func (s *Service) startCPUProfile() error {
f, err := os.Create(s.buildTargetFilePath())
if err != nil {
return err
}
err = pprof.StartCPUProfile(f)
s.cpuFile = f
return err
}
func (s *Service) buildTargetFilePath() string {
filename := s.profileType + ".prof"
if s.profileFilename != "" {
filename = s.profileFilename
}
return filepath.Join(s.profileDir, filename)
}