mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-21 04:20:23 +00:00
32 lines
1.1 KiB
Go
32 lines
1.1 KiB
Go
|
// Copyright 2018 The etcd Authors
|
||
|
|
//
|
||
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
// you may not use this file except in compliance with the License.
|
||
|
|
// You may obtain a copy of the License at
|
||
|
|
//
|
||
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
//
|
||
|
|
// Unless required by applicable law or agreed to in writing, software
|
||
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
// See the License for the specific language governing permissions and
|
||
|
|
// limitations under the License.
|
||
|
|
|
||
|
|
package clientv3
|
||
|
|
|
||
|
|
import (
|
||
|
|
"math/rand"
|
||
|
|
"time"
|
||
|
|
)
|
||
|
|
|
||
|
|
// jitterUp adds random jitter to the duration.
|
||
|
|
//
|
||
|
|
// This adds or subtracts time from the duration within a given jitter fraction.
|
||
|
|
// For example for 10s and jitter 0.1, it will return a time within [9s, 11s])
|
||
|
|
//
|
||
|
|
// Reference: https://godoc.org/github.com/grpc-ecosystem/go-grpc-middleware/util/backoffutils
|
||
|
|
func jitterUp(duration time.Duration, jitter float64) time.Duration {
|
||
|
|
multiplier := jitter * (rand.Float64()*2 - 1)
|
||
|
|
return time.Duration(float64(duration) * (1 + multiplier))
|
||
|
|
}
|