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117 lines
4.0 KiB
Go
117 lines
4.0 KiB
Go
// Copyright (c) 2015-2021 MinIO, Inc.
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//
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// This file is part of MinIO Object Storage stack
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//
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// This program is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Affero General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Affero General Public License for more details.
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//
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// You should have received a copy of the GNU Affero General Public License
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// along with this program. If not, see <http://www.gnu.org/licenses/>.
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package net
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import (
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"github.com/montanaflynn/stats"
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)
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// Latency holds latency information for read/write operations to the drive
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type Latency struct {
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Avg float64 `json:"avg_secs,omitempty"`
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Percentile50 float64 `json:"percentile50_secs,omitempty"`
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Percentile90 float64 `json:"percentile90_secs,omitempty"`
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Percentile99 float64 `json:"percentile99_secs,omitempty"`
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Min float64 `json:"min_secs,omitempty"`
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Max float64 `json:"max_secs,omitempty"`
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}
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// Throughput holds throughput information for read/write operations to the drive
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type Throughput struct {
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Avg float64 `json:"avg_bytes_per_sec,omitempty"`
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Percentile50 float64 `json:"percentile50_bytes_per_sec,omitempty"`
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Percentile90 float64 `json:"percentile90_bytes_per_sec,omitempty"`
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Percentile99 float64 `json:"percentile99_bytes_per_sec,omitempty"`
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Min float64 `json:"min_bytes_per_sec,omitempty"`
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Max float64 `json:"max_bytes_per_sec,omitempty"`
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}
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// ComputePerfStats takes arrays of Latency & Throughput to compute Statistics
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func ComputePerfStats(latencies, throughputs []float64) (Latency, Throughput, error) {
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var avgLatency float64
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var percentile50Latency float64
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var percentile90Latency float64
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var percentile99Latency float64
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var minLatency float64
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var maxLatency float64
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var avgThroughput float64
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var percentile50Throughput float64
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var percentile90Throughput float64
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var percentile99Throughput float64
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var minThroughput float64
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var maxThroughput float64
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var err error
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if avgLatency, err = stats.Mean(latencies); err != nil {
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return Latency{}, Throughput{}, err
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}
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if percentile50Latency, err = stats.Percentile(latencies, 50); err != nil {
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return Latency{}, Throughput{}, err
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}
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if percentile90Latency, err = stats.Percentile(latencies, 90); err != nil {
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return Latency{}, Throughput{}, err
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}
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if percentile99Latency, err = stats.Percentile(latencies, 99); err != nil {
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return Latency{}, Throughput{}, err
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}
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if maxLatency, err = stats.Max(latencies); err != nil {
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return Latency{}, Throughput{}, err
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}
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if minLatency, err = stats.Min(latencies); err != nil {
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return Latency{}, Throughput{}, err
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}
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l := Latency{
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Avg: avgLatency,
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Percentile50: percentile50Latency,
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Percentile90: percentile90Latency,
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Percentile99: percentile99Latency,
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Min: minLatency,
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Max: maxLatency,
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}
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if avgThroughput, err = stats.Mean(throughputs); err != nil {
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return Latency{}, Throughput{}, err
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}
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if percentile50Throughput, err = stats.Percentile(throughputs, 50); err != nil {
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return Latency{}, Throughput{}, err
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}
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if percentile90Throughput, err = stats.Percentile(throughputs, 90); err != nil {
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return Latency{}, Throughput{}, err
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}
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if percentile99Throughput, err = stats.Percentile(throughputs, 99); err != nil {
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return Latency{}, Throughput{}, err
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}
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if maxThroughput, err = stats.Max(throughputs); err != nil {
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return Latency{}, Throughput{}, err
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}
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if minThroughput, err = stats.Min(throughputs); err != nil {
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return Latency{}, Throughput{}, err
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}
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t := Throughput{
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Avg: avgThroughput,
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Percentile50: percentile50Throughput,
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Percentile90: percentile90Throughput,
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Percentile99: percentile99Throughput,
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Min: minThroughput,
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Max: maxThroughput,
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}
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return l, t, nil
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}
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