116 lines
2.8 KiB
Go
116 lines
2.8 KiB
Go
package metrics
|
|
|
|
import (
|
|
"runtime"
|
|
"time"
|
|
)
|
|
|
|
func (m *Metrics) SetGauge(key []string, val float32) {
|
|
if m.HostName != "" && m.EnableHostname {
|
|
key = insert(0, m.HostName, key)
|
|
}
|
|
if m.EnableTypePrefix {
|
|
key = insert(0, "gauge", key)
|
|
}
|
|
if m.ServiceName != "" {
|
|
key = insert(0, m.ServiceName, key)
|
|
}
|
|
m.sink.SetGauge(key, val)
|
|
}
|
|
|
|
func (m *Metrics) EmitKey(key []string, val float32) {
|
|
if m.EnableTypePrefix {
|
|
key = insert(0, "kv", key)
|
|
}
|
|
if m.ServiceName != "" {
|
|
key = insert(0, m.ServiceName, key)
|
|
}
|
|
m.sink.EmitKey(key, val)
|
|
}
|
|
|
|
func (m *Metrics) IncrCounter(key []string, val float32) {
|
|
if m.EnableTypePrefix {
|
|
key = insert(0, "counter", key)
|
|
}
|
|
if m.ServiceName != "" {
|
|
key = insert(0, m.ServiceName, key)
|
|
}
|
|
m.sink.IncrCounter(key, val)
|
|
}
|
|
|
|
func (m *Metrics) AddSample(key []string, val float32) {
|
|
if m.EnableTypePrefix {
|
|
key = insert(0, "sample", key)
|
|
}
|
|
if m.ServiceName != "" {
|
|
key = insert(0, m.ServiceName, key)
|
|
}
|
|
m.sink.AddSample(key, val)
|
|
}
|
|
|
|
func (m *Metrics) MeasureSince(key []string, start time.Time) {
|
|
if m.EnableTypePrefix {
|
|
key = insert(0, "timer", key)
|
|
}
|
|
if m.ServiceName != "" {
|
|
key = insert(0, m.ServiceName, key)
|
|
}
|
|
now := time.Now()
|
|
elapsed := now.Sub(start)
|
|
msec := float32(elapsed.Nanoseconds()) / float32(m.TimerGranularity)
|
|
m.sink.AddSample(key, msec)
|
|
}
|
|
|
|
// Periodically collects runtime stats to publish
|
|
func (m *Metrics) collectStats() {
|
|
for {
|
|
time.Sleep(m.ProfileInterval)
|
|
m.emitRuntimeStats()
|
|
}
|
|
}
|
|
|
|
// Emits various runtime statsitics
|
|
func (m *Metrics) emitRuntimeStats() {
|
|
// Export number of Goroutines
|
|
numRoutines := runtime.NumGoroutine()
|
|
m.SetGauge([]string{"runtime", "num_goroutines"}, float32(numRoutines))
|
|
|
|
// Export memory stats
|
|
var stats runtime.MemStats
|
|
runtime.ReadMemStats(&stats)
|
|
m.SetGauge([]string{"runtime", "alloc_bytes"}, float32(stats.Alloc))
|
|
m.SetGauge([]string{"runtime", "sys_bytes"}, float32(stats.Sys))
|
|
m.SetGauge([]string{"runtime", "malloc_count"}, float32(stats.Mallocs))
|
|
m.SetGauge([]string{"runtime", "free_count"}, float32(stats.Frees))
|
|
m.SetGauge([]string{"runtime", "heap_objects"}, float32(stats.HeapObjects))
|
|
m.SetGauge([]string{"runtime", "total_gc_pause_ns"}, float32(stats.PauseTotalNs))
|
|
m.SetGauge([]string{"runtime", "total_gc_runs"}, float32(stats.NumGC))
|
|
|
|
// Export info about the last few GC runs
|
|
num := stats.NumGC
|
|
|
|
// Handle wrap around
|
|
if num < m.lastNumGC {
|
|
m.lastNumGC = 0
|
|
}
|
|
|
|
// Ensure we don't scan more than 256
|
|
if num-m.lastNumGC >= 256 {
|
|
m.lastNumGC = num - 255
|
|
}
|
|
|
|
for i := m.lastNumGC; i < num; i++ {
|
|
pause := stats.PauseNs[i%256]
|
|
m.AddSample([]string{"runtime", "gc_pause_ns"}, float32(pause))
|
|
}
|
|
m.lastNumGC = num
|
|
}
|
|
|
|
// Inserts a string value at an index into the slice
|
|
func insert(i int, v string, s []string) []string {
|
|
s = append(s, "")
|
|
copy(s[i+1:], s[i:])
|
|
s[i] = v
|
|
return s
|
|
}
|