gitlab.com/aquachain/aquachain@v1.17.16-rc3.0.20221018032414-e3ddf1e1c055/common/metrics/debug_test.go (about)

     1  // Copyright 2018 The aquachain Authors
     2  // This file is part of the aquachain library.
     3  //
     4  // The aquachain library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The aquachain library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the aquachain library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package metrics
    18  
    19  import (
    20  	"runtime"
    21  	"runtime/debug"
    22  	"testing"
    23  	"time"
    24  )
    25  
    26  func BenchmarkDebugGCStats(b *testing.B) {
    27  	r := NewRegistry()
    28  	RegisterDebugGCStats(r)
    29  	b.ResetTimer()
    30  	for i := 0; i < b.N; i++ {
    31  		CaptureDebugGCStatsOnce(r)
    32  	}
    33  }
    34  
    35  func TestDebugGCStatsBlocking(t *testing.T) {
    36  	if g := runtime.GOMAXPROCS(0); g < 2 {
    37  		t.Skipf("skipping TestDebugGCMemStatsBlocking with GOMAXPROCS=%d\n", g)
    38  		return
    39  	}
    40  	ch := make(chan int)
    41  	go testDebugGCStatsBlocking(ch)
    42  	var gcStats debug.GCStats
    43  	t0 := time.Now()
    44  	debug.ReadGCStats(&gcStats)
    45  	t1 := time.Now()
    46  	t.Log("i++ during debug.ReadGCStats:", <-ch)
    47  	go testDebugGCStatsBlocking(ch)
    48  	d := t1.Sub(t0)
    49  	t.Log(d)
    50  	time.Sleep(d)
    51  	t.Log("i++ during time.Sleep:", <-ch)
    52  }
    53  
    54  func testDebugGCStatsBlocking(ch chan int) {
    55  	i := 0
    56  	for {
    57  		select {
    58  		case ch <- i:
    59  			return
    60  		default:
    61  			i++
    62  		}
    63  	}
    64  }