golang.org/x/tools/gopls@v0.15.3/internal/debug/metrics.go (about)

     1  // Copyright 2019 The Go Authors. All rights reserved.
     2  // Use of this source code is governed by a BSD-style
     3  // license that can be found in the LICENSE file.
     4  
     5  package debug
     6  
     7  import (
     8  	"golang.org/x/tools/internal/event/export/metric"
     9  	"golang.org/x/tools/internal/event/label"
    10  	"golang.org/x/tools/internal/event/tag"
    11  )
    12  
    13  var (
    14  	// the distributions we use for histograms
    15  	bytesDistribution        = []int64{1 << 10, 1 << 11, 1 << 12, 1 << 14, 1 << 16, 1 << 20}
    16  	millisecondsDistribution = []float64{0.1, 0.5, 1, 2, 5, 10, 50, 100, 500, 1000, 5000, 10000, 50000, 100000}
    17  
    18  	receivedBytes = metric.HistogramInt64{
    19  		Name:        "received_bytes",
    20  		Description: "Distribution of received bytes, by method.",
    21  		Keys:        []label.Key{tag.RPCDirection, tag.Method},
    22  		Buckets:     bytesDistribution,
    23  	}
    24  
    25  	sentBytes = metric.HistogramInt64{
    26  		Name:        "sent_bytes",
    27  		Description: "Distribution of sent bytes, by method.",
    28  		Keys:        []label.Key{tag.RPCDirection, tag.Method},
    29  		Buckets:     bytesDistribution,
    30  	}
    31  
    32  	latency = metric.HistogramFloat64{
    33  		Name:        "latency",
    34  		Description: "Distribution of latency in milliseconds, by method.",
    35  		Keys:        []label.Key{tag.RPCDirection, tag.Method},
    36  		Buckets:     millisecondsDistribution,
    37  	}
    38  
    39  	started = metric.Scalar{
    40  		Name:        "started",
    41  		Description: "Count of RPCs started by method.",
    42  		Keys:        []label.Key{tag.RPCDirection, tag.Method},
    43  	}
    44  
    45  	completed = metric.Scalar{
    46  		Name:        "completed",
    47  		Description: "Count of RPCs completed by method and status.",
    48  		Keys:        []label.Key{tag.RPCDirection, tag.Method, tag.StatusCode},
    49  	}
    50  )
    51  
    52  func registerMetrics(m *metric.Config) {
    53  	receivedBytes.Record(m, tag.ReceivedBytes)
    54  	sentBytes.Record(m, tag.SentBytes)
    55  	latency.Record(m, tag.Latency)
    56  	started.Count(m, tag.Started)
    57  	completed.Count(m, tag.Latency)
    58  }