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monitor.go
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monitor.go
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package main
import "math"
import "fmt"
import "sync"
import "flag"
import "time"
import "runtime"
import "log"
import "os"
import "io"
import "os/signal"
var stackbuf []byte = make([]byte, 102400)
var logfile *os.File
var monitorlog string
var rotatelock sync.Mutex
var lastrotation time.Time
func dumpStackTrace() {
rotatelock.Lock()
defer rotatelock.Unlock()
size := runtime.Stack(stackbuf, true)
logfile.Write(stackbuf[0:size])
logfile.Write([]byte("-----------------------------\n"))
}
func rotate() *os.File {
rotatelock.Lock()
defer rotatelock.Unlock()
if logfile != nil {
logfile.Close()
}
_, err := os.Stat(monitorlog)
if err != nil {
if !os.IsNotExist(err) {
log.Panicln("couldn't stat monitor log", err)
} else {
goto OPEN
}
}
err = os.Rename(monitorlog, monitorlog+".old")
if err != nil {
log.Fatalln("couldn't rotate monitorlog file", err)
}
OPEN: f, err := os.Create(monitorlog)
if err != nil {
log.Fatalln("couldn't create monitorlog file", monitorlog, err)
}
return f
}
func dumpHisto(w io.Writer) {
ss := make([][]int, 25)
for i := range ss {
ss[i] = make([]int, 40)
}
func () {
allSegsLock.RLock()
defer allSegsLock.RUnlock()
for _, v := range allSegs.Segs {
for i := 0; i < 12; i++ {
trg := int(v.Pitches[i] * 40)
if trg == 40 {
trg--
}
ss[i][trg]++
}
for i := 0; i < 12; i++ {
t := int(math.Log10(math.Abs(v.Timbre[i])+1))
if v.Timbre[i] > 0 {
t += 20
} else {
t = 19 - t
}
if t < 0 {
t = 0
}
if t > 39 {
t = 39
}
ss[i+12][t]++
}
trg := int(v.BeatDistance * 40)
if trg >= 40 {
trg = 39
}
ss[24][trg]++
}
}()
for _, g := range ss {
max := 0
for _, v := range g {
if v > max {
max = v
}
}
for h := max; h > 0; h-- {
for v := range g {
if v >= h {
w.Write([]byte{'#'})
} else {
w.Write([]byte{' '})
}
}
w.Write([]byte{'\n'})
}
w.Write([]byte("====\n"))
}
}
func monitor() {
logfile = rotate()
for {
fmt.Fprintln(logfile, time.Now())
fmt.Fprintf(logfile, "dumpchan %d\n", len(dumpchan))
fmt.Fprintf(logfile, "RequestQueue %d\n", len(RequestQueue))
fmt.Fprintf(logfile, "AudioQueue %d\n", len(AudioQueue))
fmt.Fprintf(logfile, "UploadChan %d\n", len(UploadChan))
// dumpHisto(logfile)
fmt.Fprintln(logfile,"----")
time.Sleep(5*time.Minute)
}
}
func signalHandler() {
c := make(chan os.Signal, 100)
signal.Notify(c, os.Interrupt)
for {
_ = <- c
dumpStackTrace()
close(RequestQueue)
close(AudioQueue)
// close(FileQueue)
close(UploadChan)
os.Exit(2)
}
}
func init() {
flag.StringVar(&monitorlog, "monitorlog", "log", "")
gofuncs = append(gofuncs, monitor)
gofuncs = append(gofuncs, signalHandler)
}