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package main
import (
"flag"
"fmt"
"log"
"os"
"runtime"
"runtime/pprof"
"time"
"github.com/BurntSushi/xgb"
"github.com/BurntSushi/xgb/xproto"
)
var (
flagRequests int
flagGOMAXPROCS int
flagCpuProfName string
flagMemProfName string
)
func init() {
flag.IntVar(&flagRequests, "requests", 100000, "Number of atoms to intern.")
flag.IntVar(&flagGOMAXPROCS, "cpu", 1, "Value of GOMAXPROCS.")
flag.StringVar(&flagCpuProfName, "cpuprof", "cpu.prof",
"Name of CPU profile file.")
flag.StringVar(&flagMemProfName, "memprof", "mem.prof",
"Name of memory profile file.")
flag.Parse()
runtime.GOMAXPROCS(flagGOMAXPROCS)
}
func seqNames(n int) []string {
names := make([]string, n)
for i := range names {
names[i] = fmt.Sprintf("NAME%d", i)
}
return names
}
func main() {
X, err := xgb.NewConn()
if err != nil {
log.Fatal(err)
}
names := seqNames(flagRequests)
fcpu, err := os.Create(flagCpuProfName)
if err != nil {
log.Fatal(err)
}
defer fcpu.Close()
pprof.StartCPUProfile(fcpu)
defer pprof.StopCPUProfile()
start := time.Now()
cookies := make([]xproto.InternAtomCookie, flagRequests)
for i := 0; i < flagRequests; i++ {
cookies[i] = xproto.InternAtom(X,
false, uint16(len(names[i])), names[i])
}
for _, cookie := range cookies {
cookie.Reply()
}
fmt.Printf("Exec time: %s\n\n", time.Since(start))
fmem, err := os.Create(flagMemProfName)
if err != nil {
log.Fatal(err)
}
defer fmem.Close()
pprof.WriteHeapProfile(fmem)
memStats := &runtime.MemStats{}
runtime.ReadMemStats(memStats)
// This isn't right. I'm not sure what's wrong.
lastGcTime := time.Unix(int64(memStats.LastGC/1000000000),
int64(memStats.LastGC-memStats.LastGC/1000000000))
fmt.Printf("Alloc: %d\n", memStats.Alloc)
fmt.Printf("TotalAlloc: %d\n", memStats.TotalAlloc)
fmt.Printf("LastGC: %s\n", lastGcTime)
fmt.Printf("PauseTotalNs: %d\n", memStats.PauseTotalNs)
fmt.Printf("PauseNs: %d\n", memStats.PauseNs)
fmt.Printf("NumGC: %d\n", memStats.NumGC)
}
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