github.com/cloudwego/runtimex@v0.1.0/runtimex_test.go (about)

     1  // Copyright 2024 CloudWeGo Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //    http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package runtimex_test
    16  
    17  import (
    18  	"runtime"
    19  	"sync"
    20  	"sync/atomic"
    21  	"testing"
    22  	"time"
    23  
    24  	"github.com/modern-go/reflect2"
    25  
    26  	"github.com/cloudwego/runtimex"
    27  )
    28  
    29  //go:noinline
    30  func testStackFunction(n int) int {
    31  	var stack [1024 * 4]int64
    32  	for i := 0; i < len(stack); i++ {
    33  		stack[i] = int64(n + i)
    34  	}
    35  	return int(stack[len(stack)/2])
    36  }
    37  
    38  func assert(t *testing.T, cond bool, args ...interface{}) {
    39  	t.Helper()
    40  	if cond {
    41  		return
    42  	}
    43  	if len(args) > 0 {
    44  		t.Fatal(args...)
    45  	}
    46  	t.Fatal("assertion failed")
    47  }
    48  
    49  func TestReflect2NotFound(t *testing.T) {
    50  	notFound, _ := reflect2.TypeByName("runtime.xxx123").(reflect2.StructType)
    51  	assert(t, notFound == nil)
    52  
    53  	gType := reflect2.TypeByName("runtime.g").(reflect2.StructType)
    54  	assert(t, gType != nil, gType)
    55  	mField := gType.FieldByName("xxx123")
    56  	assert(t, mField == nil)
    57  }
    58  
    59  func TestRuntimeStatus(t *testing.T) {
    60  	goroutines := 8
    61  	pnum := 4
    62  	oldpnum := runtime.GOMAXPROCS(pnum)
    63  	defer runtime.GOMAXPROCS(oldpnum)
    64  
    65  	var (
    66  		stop int32
    67  		wg   sync.WaitGroup
    68  		gm   sync.Map
    69  		pm   sync.Map
    70  	)
    71  	for i := 0; i < goroutines; i++ {
    72  		wg.Add(1)
    73  		go func(n int) {
    74  			defer wg.Done()
    75  			for j := 1; atomic.LoadInt32(&stop) == 0; j++ {
    76  				testStackFunction(j % 102400)
    77  
    78  				if j%1024 == 0 {
    79  					gid, err := runtimex.GID()
    80  					assert(t, err == nil)
    81  					pid, err := runtimex.PID()
    82  					assert(t, err == nil)
    83  					t.Logf("gid=%d,pid=%d", gid, pid)
    84  
    85  					gm.Store(gid, true)
    86  					pm.Store(pid, true)
    87  				}
    88  			}
    89  		}(i)
    90  	}
    91  	time.Sleep(time.Second)
    92  	atomic.StoreInt32(&stop, 1)
    93  	wg.Wait()
    94  	gcount := 0
    95  	gm.Range(func(key, value interface{}) bool {
    96  		gcount++
    97  		return true
    98  	})
    99  	pcount := 0
   100  	pm.Range(func(key, value interface{}) bool {
   101  		pcount++
   102  		return true
   103  	})
   104  	assert(t, gcount == goroutines, gcount, goroutines)
   105  	assert(t, pcount == pnum, pcount, pnum)
   106  }
   107  
   108  func BenchmarkGID(b *testing.B) {
   109  	b.ReportAllocs()
   110  	// 0 allocs/op
   111  	for i := 0; i < b.N; i++ {
   112  		id, err := runtimex.GID()
   113  		if id < 0 || err != nil {
   114  			b.Fatal(err)
   115  		}
   116  	}
   117  }
   118  
   119  func BenchmarkPID(b *testing.B) {
   120  	b.ReportAllocs()
   121  	// 0 allocs/op
   122  	for i := 0; i < b.N; i++ {
   123  		id, err := runtimex.PID()
   124  		if id < 0 || err != nil {
   125  			b.Fatal(err)
   126  		}
   127  	}
   128  }