1 package main
2
3 import (
4 "flag"
5 "fmt"
6 "log"
7 "os"
8 "runtime"
9 "runtime/pprof"
10 "time"
11
12 "github.com/jezek/xgb"
13 "github.com/jezek/xgb/xproto"
14 )
15
16 var (
17 flagRequests int
18 flagGOMAXPROCS int
19 flagCpuProfName string
20 flagMemProfName string
21 )
22
23 func init() {
24 flag.IntVar(&flagRequests, "requests", 100000, "Number of atoms to intern.")
25 flag.IntVar(&flagGOMAXPROCS, "cpu", 1, "Value of GOMAXPROCS.")
26 flag.StringVar(&flagCpuProfName, "cpuprof", "cpu.prof",
27 "Name of CPU profile file.")
28 flag.StringVar(&flagMemProfName, "memprof", "mem.prof",
29 "Name of memory profile file.")
30
31 flag.Parse()
32
33 runtime.GOMAXPROCS(flagGOMAXPROCS)
34 }
35
36 func seqNames(n int) []string {
37 names := make([]string, n)
38 for i := range names {
39 names[i] = fmt.Sprintf("NAME%d", i)
40 }
41 return names
42 }
43
44 func main() {
45 X, err := xgb.NewConn()
46 if err != nil {
47 log.Fatal(err)
48 }
49
50 names := seqNames(flagRequests)
51
52 fcpu, err := os.Create(flagCpuProfName)
53 if err != nil {
54 log.Fatal(err)
55 }
56 defer fcpu.Close()
57 pprof.StartCPUProfile(fcpu)
58 defer pprof.StopCPUProfile()
59
60 start := time.Now()
61 cookies := make([]xproto.InternAtomCookie, flagRequests)
62 for i := 0; i < flagRequests; i++ {
63 cookies[i] = xproto.InternAtom(X,
64 false, uint16(len(names[i])), names[i])
65 }
66 for _, cookie := range cookies {
67 cookie.Reply()
68 }
69 fmt.Printf("Exec time: %s\n\n", time.Since(start))
70
71 fmem, err := os.Create(flagMemProfName)
72 if err != nil {
73 log.Fatal(err)
74 }
75 defer fmem.Close()
76 pprof.WriteHeapProfile(fmem)
77
78 memStats := &runtime.MemStats{}
79 runtime.ReadMemStats(memStats)
80
81
82 lastGcTime := time.Unix(int64(memStats.LastGC/1000000000),
83 int64(memStats.LastGC-memStats.LastGC/1000000000))
84
85 fmt.Printf("Alloc: %d\n", memStats.Alloc)
86 fmt.Printf("TotalAlloc: %d\n", memStats.TotalAlloc)
87 fmt.Printf("LastGC: %s\n", lastGcTime)
88 fmt.Printf("PauseTotalNs: %d\n", memStats.PauseTotalNs)
89 fmt.Printf("PauseNs: %d\n", memStats.PauseNs)
90 fmt.Printf("NumGC: %d\n", memStats.NumGC)
91 }
92
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