mirror of https://github.com/k3s-io/k3s
56 lines
1.5 KiB
Go
56 lines
1.5 KiB
Go
// +build windows
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/*
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Copyright 2018 The Kubernetes Authors.
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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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http://www.apache.org/licenses/LICENSE-2.0
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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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*/
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package kuberuntime
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import (
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"github.com/docker/docker/pkg/sysinfo"
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)
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const (
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// Taken from https://docs.microsoft.com/en-us/virtualization/windowscontainers/manage-containers/resource-controls
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minSharesProcess = 5000
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minSharesHyperV = 10
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maxShares = 10000
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milliCPUToCPU = 1000
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)
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// milliCPUToShares converts milliCPU to CPU shares
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func milliCPUToShares(milliCPU int64, hyperv bool) int64 {
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var minShares int64 = minSharesProcess
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if hyperv {
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minShares = minSharesHyperV
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}
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if milliCPU == 0 {
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// Return here to really match kernel default for zero milliCPU.
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return minShares
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}
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// Conceptually (milliCPU / milliCPUToCPU) * sharesPerCPU, but factored to improve rounding.
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totalCPU := sysinfo.NumCPU()
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shares := (milliCPU * (maxShares - minShares)) / int64(totalCPU) / milliCPUToCPU
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if shares < minShares {
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return minShares
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}
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if shares > maxShares {
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return maxShares
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}
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return shares
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}
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