// Copyright 2018 The Prometheus 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. //go:build !nocpu // +build !nocpu package collector import ( "log/slog" "strconv" "github.com/illumos/go-kstat" "github.com/prometheus/client_golang/prometheus" ) // #include import "C" type cpuCollector struct { cpu typedDesc logger *slog.Logger } func init() { registerCollector("cpu", defaultEnabled, NewCpuCollector) } func NewCpuCollector(logger *slog.Logger) (Collector, error) { return &cpuCollector{ cpu: typedDesc{nodeCPUSecondsDesc, prometheus.CounterValue}, logger: logger, }, nil } func (c *cpuCollector) Update(ch chan<- prometheus.Metric) error { ncpus := C.sysconf(C._SC_NPROCESSORS_ONLN) tok, err := kstat.Open() if err != nil { return err } defer tok.Close() for cpu := 0; cpu < int(ncpus); cpu++ { ksCPU, err := tok.Lookup("cpu", cpu, "sys") if err != nil { return err } for k, v := range map[string]string{ "idle": "cpu_nsec_idle", "kernel": "cpu_nsec_kernel", "user": "cpu_nsec_user", "wait": "cpu_nsec_wait", } { kstatValue, err := ksCPU.GetNamed(v) if err != nil { return err } ch <- c.cpu.mustNewConstMetric(float64(kstatValue.UintVal)/1e9, strconv.Itoa(cpu), k) } } return nil }