github.com/fxsjy/go-ethereum@v1.8.4-0.20180410143526-2e247705cd27/metrics/runtime.go (about)

     1  package metrics
     2  
     3  import (
     4  	"runtime"
     5  	"runtime/pprof"
     6  	"time"
     7  )
     8  
     9  var (
    10  	memStats       runtime.MemStats
    11  	runtimeMetrics struct {
    12  		MemStats struct {
    13  			Alloc         Gauge
    14  			BuckHashSys   Gauge
    15  			DebugGC       Gauge
    16  			EnableGC      Gauge
    17  			Frees         Gauge
    18  			HeapAlloc     Gauge
    19  			HeapIdle      Gauge
    20  			HeapInuse     Gauge
    21  			HeapObjects   Gauge
    22  			HeapReleased  Gauge
    23  			HeapSys       Gauge
    24  			LastGC        Gauge
    25  			Lookups       Gauge
    26  			Mallocs       Gauge
    27  			MCacheInuse   Gauge
    28  			MCacheSys     Gauge
    29  			MSpanInuse    Gauge
    30  			MSpanSys      Gauge
    31  			NextGC        Gauge
    32  			NumGC         Gauge
    33  			GCCPUFraction GaugeFloat64
    34  			PauseNs       Histogram
    35  			PauseTotalNs  Gauge
    36  			StackInuse    Gauge
    37  			StackSys      Gauge
    38  			Sys           Gauge
    39  			TotalAlloc    Gauge
    40  		}
    41  		NumCgoCall   Gauge
    42  		NumGoroutine Gauge
    43  		NumThread    Gauge
    44  		ReadMemStats Timer
    45  	}
    46  	frees       uint64
    47  	lookups     uint64
    48  	mallocs     uint64
    49  	numGC       uint32
    50  	numCgoCalls int64
    51  
    52  	threadCreateProfile = pprof.Lookup("threadcreate")
    53  )
    54  
    55  // Capture new values for the Go runtime statistics exported in
    56  // runtime.MemStats.  This is designed to be called as a goroutine.
    57  func CaptureRuntimeMemStats(r Registry, d time.Duration) {
    58  	for range time.Tick(d) {
    59  		CaptureRuntimeMemStatsOnce(r)
    60  	}
    61  }
    62  
    63  // Capture new values for the Go runtime statistics exported in
    64  // runtime.MemStats.  This is designed to be called in a background
    65  // goroutine.  Giving a registry which has not been given to
    66  // RegisterRuntimeMemStats will panic.
    67  //
    68  // Be very careful with this because runtime.ReadMemStats calls the C
    69  // functions runtime·semacquire(&runtime·worldsema) and runtime·stoptheworld()
    70  // and that last one does what it says on the tin.
    71  func CaptureRuntimeMemStatsOnce(r Registry) {
    72  	t := time.Now()
    73  	runtime.ReadMemStats(&memStats) // This takes 50-200us.
    74  	runtimeMetrics.ReadMemStats.UpdateSince(t)
    75  
    76  	runtimeMetrics.MemStats.Alloc.Update(int64(memStats.Alloc))
    77  	runtimeMetrics.MemStats.BuckHashSys.Update(int64(memStats.BuckHashSys))
    78  	if memStats.DebugGC {
    79  		runtimeMetrics.MemStats.DebugGC.Update(1)
    80  	} else {
    81  		runtimeMetrics.MemStats.DebugGC.Update(0)
    82  	}
    83  	if memStats.EnableGC {
    84  		runtimeMetrics.MemStats.EnableGC.Update(1)
    85  	} else {
    86  		runtimeMetrics.MemStats.EnableGC.Update(0)
    87  	}
    88  
    89  	runtimeMetrics.MemStats.Frees.Update(int64(memStats.Frees - frees))
    90  	runtimeMetrics.MemStats.HeapAlloc.Update(int64(memStats.HeapAlloc))
    91  	runtimeMetrics.MemStats.HeapIdle.Update(int64(memStats.HeapIdle))
    92  	runtimeMetrics.MemStats.HeapInuse.Update(int64(memStats.HeapInuse))
    93  	runtimeMetrics.MemStats.HeapObjects.Update(int64(memStats.HeapObjects))
    94  	runtimeMetrics.MemStats.HeapReleased.Update(int64(memStats.HeapReleased))
    95  	runtimeMetrics.MemStats.HeapSys.Update(int64(memStats.HeapSys))
    96  	runtimeMetrics.MemStats.LastGC.Update(int64(memStats.LastGC))
    97  	runtimeMetrics.MemStats.Lookups.Update(int64(memStats.Lookups - lookups))
    98  	runtimeMetrics.MemStats.Mallocs.Update(int64(memStats.Mallocs - mallocs))
    99  	runtimeMetrics.MemStats.MCacheInuse.Update(int64(memStats.MCacheInuse))
   100  	runtimeMetrics.MemStats.MCacheSys.Update(int64(memStats.MCacheSys))
   101  	runtimeMetrics.MemStats.MSpanInuse.Update(int64(memStats.MSpanInuse))
   102  	runtimeMetrics.MemStats.MSpanSys.Update(int64(memStats.MSpanSys))
   103  	runtimeMetrics.MemStats.NextGC.Update(int64(memStats.NextGC))
   104  	runtimeMetrics.MemStats.NumGC.Update(int64(memStats.NumGC - numGC))
   105  	runtimeMetrics.MemStats.GCCPUFraction.Update(gcCPUFraction(&memStats))
   106  
   107  	// <https://code.google.com/p/go/source/browse/src/pkg/runtime/mgc0.c>
   108  	i := numGC % uint32(len(memStats.PauseNs))
   109  	ii := memStats.NumGC % uint32(len(memStats.PauseNs))
   110  	if memStats.NumGC-numGC >= uint32(len(memStats.PauseNs)) {
   111  		for i = 0; i < uint32(len(memStats.PauseNs)); i++ {
   112  			runtimeMetrics.MemStats.PauseNs.Update(int64(memStats.PauseNs[i]))
   113  		}
   114  	} else {
   115  		if i > ii {
   116  			for ; i < uint32(len(memStats.PauseNs)); i++ {
   117  				runtimeMetrics.MemStats.PauseNs.Update(int64(memStats.PauseNs[i]))
   118  			}
   119  			i = 0
   120  		}
   121  		for ; i < ii; i++ {
   122  			runtimeMetrics.MemStats.PauseNs.Update(int64(memStats.PauseNs[i]))
   123  		}
   124  	}
   125  	frees = memStats.Frees
   126  	lookups = memStats.Lookups
   127  	mallocs = memStats.Mallocs
   128  	numGC = memStats.NumGC
   129  
   130  	runtimeMetrics.MemStats.PauseTotalNs.Update(int64(memStats.PauseTotalNs))
   131  	runtimeMetrics.MemStats.StackInuse.Update(int64(memStats.StackInuse))
   132  	runtimeMetrics.MemStats.StackSys.Update(int64(memStats.StackSys))
   133  	runtimeMetrics.MemStats.Sys.Update(int64(memStats.Sys))
   134  	runtimeMetrics.MemStats.TotalAlloc.Update(int64(memStats.TotalAlloc))
   135  
   136  	currentNumCgoCalls := numCgoCall()
   137  	runtimeMetrics.NumCgoCall.Update(currentNumCgoCalls - numCgoCalls)
   138  	numCgoCalls = currentNumCgoCalls
   139  
   140  	runtimeMetrics.NumGoroutine.Update(int64(runtime.NumGoroutine()))
   141  
   142  	runtimeMetrics.NumThread.Update(int64(threadCreateProfile.Count()))
   143  }
   144  
   145  // Register runtimeMetrics for the Go runtime statistics exported in runtime and
   146  // specifically runtime.MemStats.  The runtimeMetrics are named by their
   147  // fully-qualified Go symbols, i.e. runtime.MemStats.Alloc.
   148  func RegisterRuntimeMemStats(r Registry) {
   149  	runtimeMetrics.MemStats.Alloc = NewGauge()
   150  	runtimeMetrics.MemStats.BuckHashSys = NewGauge()
   151  	runtimeMetrics.MemStats.DebugGC = NewGauge()
   152  	runtimeMetrics.MemStats.EnableGC = NewGauge()
   153  	runtimeMetrics.MemStats.Frees = NewGauge()
   154  	runtimeMetrics.MemStats.HeapAlloc = NewGauge()
   155  	runtimeMetrics.MemStats.HeapIdle = NewGauge()
   156  	runtimeMetrics.MemStats.HeapInuse = NewGauge()
   157  	runtimeMetrics.MemStats.HeapObjects = NewGauge()
   158  	runtimeMetrics.MemStats.HeapReleased = NewGauge()
   159  	runtimeMetrics.MemStats.HeapSys = NewGauge()
   160  	runtimeMetrics.MemStats.LastGC = NewGauge()
   161  	runtimeMetrics.MemStats.Lookups = NewGauge()
   162  	runtimeMetrics.MemStats.Mallocs = NewGauge()
   163  	runtimeMetrics.MemStats.MCacheInuse = NewGauge()
   164  	runtimeMetrics.MemStats.MCacheSys = NewGauge()
   165  	runtimeMetrics.MemStats.MSpanInuse = NewGauge()
   166  	runtimeMetrics.MemStats.MSpanSys = NewGauge()
   167  	runtimeMetrics.MemStats.NextGC = NewGauge()
   168  	runtimeMetrics.MemStats.NumGC = NewGauge()
   169  	runtimeMetrics.MemStats.GCCPUFraction = NewGaugeFloat64()
   170  	runtimeMetrics.MemStats.PauseNs = NewHistogram(NewExpDecaySample(1028, 0.015))
   171  	runtimeMetrics.MemStats.PauseTotalNs = NewGauge()
   172  	runtimeMetrics.MemStats.StackInuse = NewGauge()
   173  	runtimeMetrics.MemStats.StackSys = NewGauge()
   174  	runtimeMetrics.MemStats.Sys = NewGauge()
   175  	runtimeMetrics.MemStats.TotalAlloc = NewGauge()
   176  	runtimeMetrics.NumCgoCall = NewGauge()
   177  	runtimeMetrics.NumGoroutine = NewGauge()
   178  	runtimeMetrics.NumThread = NewGauge()
   179  	runtimeMetrics.ReadMemStats = NewTimer()
   180  
   181  	r.Register("runtime.MemStats.Alloc", runtimeMetrics.MemStats.Alloc)
   182  	r.Register("runtime.MemStats.BuckHashSys", runtimeMetrics.MemStats.BuckHashSys)
   183  	r.Register("runtime.MemStats.DebugGC", runtimeMetrics.MemStats.DebugGC)
   184  	r.Register("runtime.MemStats.EnableGC", runtimeMetrics.MemStats.EnableGC)
   185  	r.Register("runtime.MemStats.Frees", runtimeMetrics.MemStats.Frees)
   186  	r.Register("runtime.MemStats.HeapAlloc", runtimeMetrics.MemStats.HeapAlloc)
   187  	r.Register("runtime.MemStats.HeapIdle", runtimeMetrics.MemStats.HeapIdle)
   188  	r.Register("runtime.MemStats.HeapInuse", runtimeMetrics.MemStats.HeapInuse)
   189  	r.Register("runtime.MemStats.HeapObjects", runtimeMetrics.MemStats.HeapObjects)
   190  	r.Register("runtime.MemStats.HeapReleased", runtimeMetrics.MemStats.HeapReleased)
   191  	r.Register("runtime.MemStats.HeapSys", runtimeMetrics.MemStats.HeapSys)
   192  	r.Register("runtime.MemStats.LastGC", runtimeMetrics.MemStats.LastGC)
   193  	r.Register("runtime.MemStats.Lookups", runtimeMetrics.MemStats.Lookups)
   194  	r.Register("runtime.MemStats.Mallocs", runtimeMetrics.MemStats.Mallocs)
   195  	r.Register("runtime.MemStats.MCacheInuse", runtimeMetrics.MemStats.MCacheInuse)
   196  	r.Register("runtime.MemStats.MCacheSys", runtimeMetrics.MemStats.MCacheSys)
   197  	r.Register("runtime.MemStats.MSpanInuse", runtimeMetrics.MemStats.MSpanInuse)
   198  	r.Register("runtime.MemStats.MSpanSys", runtimeMetrics.MemStats.MSpanSys)
   199  	r.Register("runtime.MemStats.NextGC", runtimeMetrics.MemStats.NextGC)
   200  	r.Register("runtime.MemStats.NumGC", runtimeMetrics.MemStats.NumGC)
   201  	r.Register("runtime.MemStats.GCCPUFraction", runtimeMetrics.MemStats.GCCPUFraction)
   202  	r.Register("runtime.MemStats.PauseNs", runtimeMetrics.MemStats.PauseNs)
   203  	r.Register("runtime.MemStats.PauseTotalNs", runtimeMetrics.MemStats.PauseTotalNs)
   204  	r.Register("runtime.MemStats.StackInuse", runtimeMetrics.MemStats.StackInuse)
   205  	r.Register("runtime.MemStats.StackSys", runtimeMetrics.MemStats.StackSys)
   206  	r.Register("runtime.MemStats.Sys", runtimeMetrics.MemStats.Sys)
   207  	r.Register("runtime.MemStats.TotalAlloc", runtimeMetrics.MemStats.TotalAlloc)
   208  	r.Register("runtime.NumCgoCall", runtimeMetrics.NumCgoCall)
   209  	r.Register("runtime.NumGoroutine", runtimeMetrics.NumGoroutine)
   210  	r.Register("runtime.NumThread", runtimeMetrics.NumThread)
   211  	r.Register("runtime.ReadMemStats", runtimeMetrics.ReadMemStats)
   212  }