mirror of
https://github.com/kubernetes-sigs/node-feature-discovery.git
synced 2025-03-15 13:07:48 +00:00
655f5c5555
Remove 'cpuid', 'pstate' and 'rdt' feature sources and move their
functionality under the 'cpu' source. The goal is to have a more
systematic organization of feature sources and labels. After this change
we now basically have one source per type of hw, one for kernel and one
for userspace sw.
Related feature labels are changed, correspondingly, new labels being:
feature.node.k8s.io/cpu-cpuid.<cpuid flag>
feature.node.k8s.io/cpu-pstate.turbo
feature.node.k8s.io/cpu-rdt.<rdt feature>
44 lines
1.2 KiB
Go
44 lines
1.2 KiB
Go
/*
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Copyright 2017 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 cpu
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import (
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"fmt"
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"io/ioutil"
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"runtime"
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)
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// Discover returns feature names for p-state related features such as turbo boost.
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func turboEnabled() (bool, error) {
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// On Arm platform, the frequency boost mechanism is software-based.
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// So skip pstate detection on Arm.
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switch runtime.GOARCH {
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case "arm64":
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return false, nil
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}
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// Only looking for turbo boost for now...
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bytes, err := ioutil.ReadFile("/sys/devices/system/cpu/intel_pstate/no_turbo")
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if err != nil {
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return false, fmt.Errorf("can't detect whether turbo boost is enabled: %s", err.Error())
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}
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if bytes[0] == byte('0') {
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return true, nil
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}
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return false, nil
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}
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