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author | Christopher Speller <crspeller@gmail.com> | 2017-05-17 16:51:25 -0400 |
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committer | GitHub <noreply@github.com> | 2017-05-17 16:51:25 -0400 |
commit | d103ed6ca97ca5a2669f6cf5fe4b3d2a9c945f26 (patch) | |
tree | dbde13123c6add150448f7b75753ac022d862475 /vendor/github.com/armon/go-metrics/metrics.go | |
parent | cd23b8139a9463b67e3096744321f6f4eb0ca40a (diff) | |
download | chat-d103ed6ca97ca5a2669f6cf5fe4b3d2a9c945f26.tar.gz chat-d103ed6ca97ca5a2669f6cf5fe4b3d2a9c945f26.tar.bz2 chat-d103ed6ca97ca5a2669f6cf5fe4b3d2a9c945f26.zip |
Upgrading server dependancies (#6431)
Diffstat (limited to 'vendor/github.com/armon/go-metrics/metrics.go')
-rwxr-xr-x | vendor/github.com/armon/go-metrics/metrics.go | 115 |
1 files changed, 115 insertions, 0 deletions
diff --git a/vendor/github.com/armon/go-metrics/metrics.go b/vendor/github.com/armon/go-metrics/metrics.go new file mode 100755 index 000000000..b818e4182 --- /dev/null +++ b/vendor/github.com/armon/go-metrics/metrics.go @@ -0,0 +1,115 @@ +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 +} |