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Diffstat (limited to 'src/runtime/metrics/histogram.go')
| -rw-r--r-- | src/runtime/metrics/histogram.go | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/runtime/metrics/histogram.go b/src/runtime/metrics/histogram.go new file mode 100644 index 0000000000..e1364e1e26 --- /dev/null +++ b/src/runtime/metrics/histogram.go @@ -0,0 +1,30 @@ +// Copyright 2020 The Go Authors. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package metrics + +// Float64Histogram represents a distribution of float64 values. +type Float64Histogram struct { + // Counts contains the weights for each histogram bucket. The length of + // Counts is equal to the length of Buckets (in the metric description) + // plus one to account for the implicit minimum bucket. + // + // Given N buckets, the following is the mathematical relationship between + // Counts and Buckets. + // count[0] is the weight of the range (-inf, bucket[0]) + // count[n] is the weight of the range [bucket[n], bucket[n+1]), for 0 < n < N-1 + // count[N-1] is the weight of the range [bucket[N-1], inf) + Counts []uint64 + + // Buckets contains the boundaries between histogram buckets, in increasing order. + // + // Because this slice contains boundaries, there are len(Buckets)+1 counts: + // a count for all values less than the first boundary, a count covering each + // [slice[i], slice[i+1]) interval, and a count for all values greater than or + // equal to the last boundary. + // + // For a given metric name, the value of Buckets is guaranteed not to change + // between calls until program exit. + Buckets []float64 +} |