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Etienne PerotandgVisor bot
7de3c5af4a
Useful to search for decent bucket sizes interactively. PiperOrigin-RevId: 480214658
69 lines
2.7 KiB
Go
69 lines
2.7 KiB
Go
// Copyright 2019 The gVisor Authors.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// buckettool prints buckets for distribution metrics.
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package main
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import (
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"fmt"
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"os"
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"time"
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"gvisor.dev/gvisor/pkg/log"
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"gvisor.dev/gvisor/pkg/metric"
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"gvisor.dev/gvisor/runsc/flag"
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)
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var (
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typeFlag = flag.String("type", "duration", "Type of the bucketer: 'duration' or 'exponential'")
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numFiniteBucketsFlag = flag.Int("num_finite_buckets", 8, "Number of finite buckets")
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minDurationFlag = flag.Duration("min_duration", 5*time.Millisecond, "For -type=duration: Minimum duration")
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maxDurationFlag = flag.Duration("max_duration", 10*time.Minute, "For -type=duration: Maximum duration")
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widthFlag = flag.Uint64("exponential_width", 5, "For -type=exponential: Initial bucket width")
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scaleFlag = flag.Float64("exponential_scale", 10, "For -type=exponential: Scaling factor")
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growthFlag = flag.Float64("exponential_growth", 4, "For -type=exponential: Exponential growth factor")
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)
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func exitf(format string, values ...any) {
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log.Warningf(format, values...)
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os.Exit(1)
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}
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func main() {
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flag.Parse()
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var bucketer metric.Bucketer
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var formatVal func(int64) string
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switch *typeFlag {
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case "duration":
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bucketer = metric.NewDurationBucketer(*numFiniteBucketsFlag, *minDurationFlag, *maxDurationFlag)
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formatVal = func(val int64) string {
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return time.Duration(val).String()
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}
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case "exponential":
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bucketer = metric.NewExponentialBucketer(*numFiniteBucketsFlag, *widthFlag, *scaleFlag, *growthFlag)
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formatVal = func(val int64) string {
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return fmt.Sprintf("%v", val)
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}
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default:
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exitf("Invalid -type: %s", *typeFlag)
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}
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fmt.Printf("Number of finite buckets: %d\n", bucketer.NumFiniteBuckets())
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fmt.Printf("Number of total buckets: %d\n", bucketer.NumFiniteBuckets()+2)
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fmt.Printf("> Underflow bucket: (-inf; %s)\n", formatVal(bucketer.LowerBound(0)))
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for b := 0; b < bucketer.NumFiniteBuckets(); b++ {
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fmt.Printf("> Bucket index %d: [%s, %s). (Middle: %s)\n", b, formatVal(bucketer.LowerBound(b)), formatVal(bucketer.LowerBound(b+1)), formatVal((bucketer.LowerBound(b)+bucketer.LowerBound(b+1))/2))
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}
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fmt.Printf("> Overflow bucket: [%s; +inf)\n", formatVal(bucketer.LowerBound(bucketer.NumFiniteBuckets())))
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}
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