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authorAnton Evangelatov <anton.evangelatov@gmail.com>2018-02-23 17:56:08 +0800
committerPéter Szilágyi <peterke@gmail.com>2018-02-23 17:56:08 +0800
commitae9f97221a96a86e4343a5c3cc4b1db44627a2f3 (patch)
tree0154be72d0f2e1f032d129b9433d1bf3939cd8f0 /metrics/runtime_test.go
parent7f74bdf8dded0e1ac3c01e043c2ed89d78f308cf (diff)
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metrics: pull library and introduce ResettingTimer and InfluxDB reporter (#15910)
* go-metrics: fork library and introduce ResettingTimer and InfluxDB reporter. * vendor: change nonsense/go-metrics to ethersphere/go-metrics * go-metrics: add tests. move ResettingTimer logic from reporter to type. * all, metrics: pull in metrics package in go-ethereum * metrics/test: make sure metrics are enabled for tests * metrics: apply gosimple rules * metrics/exp, internal/debug: init expvar endpoint when starting pprof server * internal/debug: tiny comment formatting fix
Diffstat (limited to 'metrics/runtime_test.go')
-rw-r--r--metrics/runtime_test.go88
1 files changed, 88 insertions, 0 deletions
diff --git a/metrics/runtime_test.go b/metrics/runtime_test.go
new file mode 100644
index 000000000..ebbfd501a
--- /dev/null
+++ b/metrics/runtime_test.go
@@ -0,0 +1,88 @@
+package metrics
+
+import (
+ "runtime"
+ "testing"
+ "time"
+)
+
+func BenchmarkRuntimeMemStats(b *testing.B) {
+ r := NewRegistry()
+ RegisterRuntimeMemStats(r)
+ b.ResetTimer()
+ for i := 0; i < b.N; i++ {
+ CaptureRuntimeMemStatsOnce(r)
+ }
+}
+
+func TestRuntimeMemStats(t *testing.T) {
+ r := NewRegistry()
+ RegisterRuntimeMemStats(r)
+ CaptureRuntimeMemStatsOnce(r)
+ zero := runtimeMetrics.MemStats.PauseNs.Count() // Get a "zero" since GC may have run before these tests.
+ runtime.GC()
+ CaptureRuntimeMemStatsOnce(r)
+ if count := runtimeMetrics.MemStats.PauseNs.Count(); 1 != count-zero {
+ t.Fatal(count - zero)
+ }
+ runtime.GC()
+ runtime.GC()
+ CaptureRuntimeMemStatsOnce(r)
+ if count := runtimeMetrics.MemStats.PauseNs.Count(); 3 != count-zero {
+ t.Fatal(count - zero)
+ }
+ for i := 0; i < 256; i++ {
+ runtime.GC()
+ }
+ CaptureRuntimeMemStatsOnce(r)
+ if count := runtimeMetrics.MemStats.PauseNs.Count(); 259 != count-zero {
+ t.Fatal(count - zero)
+ }
+ for i := 0; i < 257; i++ {
+ runtime.GC()
+ }
+ CaptureRuntimeMemStatsOnce(r)
+ if count := runtimeMetrics.MemStats.PauseNs.Count(); 515 != count-zero { // We lost one because there were too many GCs between captures.
+ t.Fatal(count - zero)
+ }
+}
+
+func TestRuntimeMemStatsNumThread(t *testing.T) {
+ r := NewRegistry()
+ RegisterRuntimeMemStats(r)
+ CaptureRuntimeMemStatsOnce(r)
+
+ if value := runtimeMetrics.NumThread.Value(); value < 1 {
+ t.Fatalf("got NumThread: %d, wanted at least 1", value)
+ }
+}
+
+func TestRuntimeMemStatsBlocking(t *testing.T) {
+ if g := runtime.GOMAXPROCS(0); g < 2 {
+ t.Skipf("skipping TestRuntimeMemStatsBlocking with GOMAXPROCS=%d\n", g)
+ }
+ ch := make(chan int)
+ go testRuntimeMemStatsBlocking(ch)
+ var memStats runtime.MemStats
+ t0 := time.Now()
+ runtime.ReadMemStats(&memStats)
+ t1 := time.Now()
+ t.Log("i++ during runtime.ReadMemStats:", <-ch)
+ go testRuntimeMemStatsBlocking(ch)
+ d := t1.Sub(t0)
+ t.Log(d)
+ time.Sleep(d)
+ t.Log("i++ during time.Sleep:", <-ch)
+}
+
+func testRuntimeMemStatsBlocking(ch chan int) {
+ i := 0
+ for {
+ select {
+ case ch <- i:
+ return
+ default:
+ i++
+ }
+ }
+}