mirror of https://github.com/knative/pkg.git
141 lines
3.3 KiB
Go
141 lines
3.3 KiB
Go
/*
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Copyright 2019 The Knative Authors
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package metrics
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import (
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"context"
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"runtime"
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"runtime/debug"
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"testing"
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"time"
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"go.opencensus.io/stats/view"
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"knative.dev/pkg/metrics/metricstest"
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)
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func TestMemStatsMetrics(t *testing.T) {
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oldV := debug.SetGCPercent(-1)
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t.Cleanup(func() { debug.SetGCPercent(oldV) })
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ctx, cancel := context.WithCancel(context.Background())
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t.Cleanup(cancel)
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const period = 200 * time.Millisecond
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msp := NewMemStatsAll()
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msp.Start(ctx, period)
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// Reset the metrics configuration to avoid leaked state from other tests.
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InitForTesting()
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views := msp.DefaultViews()
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if got, want := len(views), 27; got != want {
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t.Errorf("len(DefaultViews()) = %d, want %d", got, want)
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}
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if err := view.Register(views...); err != nil {
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t.Error("view.Register() =", err)
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}
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defer view.Unregister(views...)
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metricstest.CheckStatsNotReported(t,
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"go_alloc",
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"go_total_alloc",
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"go_sys",
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"go_lookups",
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"go_mallocs",
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"go_frees",
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"go_heap_alloc",
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"go_heap_sys",
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"go_heap_idle",
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"go_heap_in_use",
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"go_heap_released",
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"go_heap_objects",
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"go_stack_in_use",
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"go_stack_sys",
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"go_mspan_in_use",
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"go_mspan_sys",
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"go_mcache_in_use",
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"go_mcache_sys",
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"go_bucket_hash_sys",
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"go_gc_sys",
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"go_other_sys",
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"go_next_gc",
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"go_last_gc",
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"go_total_gc_pause_ns",
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"go_num_gc",
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"go_num_forced_gc",
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"go_gc_cpu_fraction",
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)
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time.Sleep(period + 100*time.Millisecond)
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metricstest.CheckStatsReported(t,
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"go_alloc",
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"go_total_alloc",
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"go_sys",
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"go_lookups",
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"go_mallocs",
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"go_frees",
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"go_heap_alloc",
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"go_heap_sys",
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"go_heap_idle",
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"go_heap_in_use",
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"go_heap_released",
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"go_heap_objects",
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"go_stack_in_use",
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"go_stack_sys",
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"go_mspan_in_use",
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"go_mspan_sys",
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"go_mcache_in_use",
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"go_mcache_sys",
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"go_bucket_hash_sys",
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"go_gc_sys",
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"go_other_sys",
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"go_next_gc",
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"go_last_gc",
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"go_total_gc_pause_ns",
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"go_num_gc",
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"go_num_forced_gc",
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"go_gc_cpu_fraction",
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)
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want := metricstest.GetLastValueData(t, "go_num_forced_gc", map[string]string{})
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// We have seen zero forced GCs.
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metricstest.CheckLastValueData(t, "go_num_forced_gc", map[string]string{}, want)
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// Force a GC, and wait for the reporting period.
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runtime.GC()
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want++
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time.Sleep(period + 100*time.Millisecond)
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// Now we should report a single forced GC.
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metricstest.CheckLastValueData(t, "go_num_forced_gc", map[string]string{}, want)
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// Repeat, and we should see two.
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runtime.GC()
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want++
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time.Sleep(period + 100*time.Millisecond)
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metricstest.CheckLastValueData(t, "go_num_forced_gc", map[string]string{}, want)
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// After we cancel the context, it should kill the go routine and any additional GCs
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// should not be reported.
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cancel()
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runtime.GC()
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time.Sleep(period + 100*time.Millisecond)
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metricstest.CheckLastValueData(t, "go_num_forced_gc", map[string]string{}, want)
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}
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