// Collect returns the current state of all metrics of the collector.
func (c *goCollector) Collect(ch chan<- Metric) {
c.goroutines.Set(float64(runtime.NumGoroutine()))
ch <- c.goroutines
var stats debug.GCStats
stats.PauseQuantiles = make([]time.Duration, 5)
debug.ReadGCStats(&stats)
quantiles := make(map[float64]float64)
for idx, pq := range stats.PauseQuantiles[1:] {
quantiles[float64(idx+1)/float64(len(stats.PauseQuantiles)-1)] = pq.Seconds()
}
quantiles[0.0] = stats.PauseQuantiles[0].Seconds()
ch <- MustNewConstSummary(c.gcDesc, uint64(stats.NumGC), float64(stats.PauseTotal.Seconds()), quantiles)
}
func (rm *RuntimeMetrics) Report() {
var mem runtime.MemStats
runtime.ReadMemStats(&mem)
if rm.options.Memory {
// bytes allocated and not yet freed
rm.reportGauge("alloc", float64(mem.Alloc))
// total number of allocated objects
rm.reportGauge("heap_objects", float64(mem.HeapObjects))
}
if rm.options.GC {
rm.reportGauge("pause_total_ns", float64(mem.PauseTotalNs))
rm.reportGauge("num_gc", float64(mem.NumGC))
rm.reportGauge("next_gc", float64(mem.NextGC))
rm.reportGauge("gc_cpu_fraction", mem.GCCPUFraction)
}
if rm.options.GCQuantile {
var gc debug.GCStats
gc.PauseQuantiles = make([]time.Duration, 3)
debug.ReadGCStats(&gc)
rm.reportGauge("gc_pause_quantile_50", float64(gc.PauseQuantiles[1]/1000)/1000.0)
rm.reportGauge("gc_pause_quantile_max", float64(gc.PauseQuantiles[2]/1000)/1000.0)
}
if rm.options.Goroutines {
rm.reportGauge("num_goroutines", float64(runtime.NumGoroutine()))
}
if rm.options.Cgo {
rm.reportGauge("num_cgo_call", float64(runtime.NumCgoCall()))
}
if rm.options.FDs {
if num, err := getFDUsage(); err == nil {
rm.reportGauge("num_fds_used", float64(num))
}
}
}
func (i *info) dumpGC(buf *bytes.Buffer) {
buf.WriteString("# GC\r\n")
count := 5
var st debug.GCStats
st.Pause = make([]time.Duration, count)
// st.PauseQuantiles = make([]time.Duration, count)
debug.ReadGCStats(&st)
h := make([]string, 0, count)
for i := 0; i < count && i < len(st.Pause); i++ {
h = append(h, st.Pause[i].String())
}
i.dumpPairs(buf, infoPair{"gc_last_time", st.LastGC.Format(gcTimeFormat)},
infoPair{"gc_num", st.NumGC},
infoPair{"gc_pause_total", st.PauseTotal.String()},
infoPair{"gc_pause_history", strings.Join(h, ",")},
)
}