mirror of
https://github.com/prometheus/node_exporter
synced 2024-12-18 04:15:06 +00:00
66 lines
1.4 KiB
Go
66 lines
1.4 KiB
Go
// Copyright 2015 The Prometheus 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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//
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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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//go:build !noloadavg
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// +build !noloadavg
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package collector
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import (
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"fmt"
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"strconv"
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"github.com/illumos/go-kstat"
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)
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// #include <sys/param.h>
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import "C"
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func kstatToFloat(ks *kstat.KStat, kstatKey string) float64 {
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kstatValue, err := ks.GetNamed(kstatKey)
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if err != nil {
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panic(err)
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}
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kstatLoadavg, err := strconv.ParseFloat(
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fmt.Sprintf("%.2f", float64(kstatValue.UintVal)/C.FSCALE), 64)
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if err != nil {
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panic(err)
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}
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return kstatLoadavg
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}
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func getLoad() ([]float64, error) {
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tok, err := kstat.Open()
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if err != nil {
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panic(err)
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}
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defer tok.Close()
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ks, err := tok.Lookup("unix", 0, "system_misc")
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if err != nil {
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panic(err)
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}
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loadavg1Min := kstatToFloat(ks, "avenrun_1min")
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loadavg5Min := kstatToFloat(ks, "avenrun_5min")
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loadavg15Min := kstatToFloat(ks, "avenrun_15min")
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return []float64{loadavg1Min, loadavg5Min, loadavg15Min}, nil
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}
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