export cpu and mem profiles to a file that can be processed by pprof tool
(memprofile, cpuprofile string)
| 79 | |
| 80 | // export cpu and mem profiles to a file that can be processed by pprof tool |
| 81 | func runPprof(memprofile, cpuprofile string) { |
| 82 | |
| 83 | go func() { |
| 84 | fmt.Println(http.ListenAndServe("localhost:6060", nil)) |
| 85 | }() |
| 86 | |
| 87 | if cpuprofile != "" { |
| 88 | f, err := os.Create(cpuprofile) |
| 89 | if err != nil { |
| 90 | log.Fatal("could not create CPU profile: ", err) |
| 91 | } |
| 92 | defer f.Close() // error handling omitted for example |
| 93 | if err := pprof.StartCPUProfile(f); err != nil { |
| 94 | log.Fatal("could not start CPU profile: ", err) |
| 95 | } |
| 96 | defer pprof.StopCPUProfile() |
| 97 | } |
| 98 | |
| 99 | if memprofile != "" { |
| 100 | f, err := os.Create(memprofile) |
| 101 | if err != nil { |
| 102 | log.Fatal("could not create memory profile: ", err) |
| 103 | } |
| 104 | defer f.Close() // error handling omitted for example |
| 105 | runtime.GC() // get up-to-date statistics |
| 106 | if err := pprof.WriteHeapProfile(f); err != nil { |
| 107 | log.Fatal("could not write memory profile: ", err) |
| 108 | } |
| 109 | } |
| 110 | } |
| 111 | |
| 112 | func main() { |
| 113 | numWorkers := flag.Int("workers", 1, "number of workers") |