mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-28 23:19:46 -08:00
85 lines
2.5 KiB
Go
85 lines
2.5 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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// +build freebsd dragonfly
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// +build !nomeminfo
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package collector
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import (
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"fmt"
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"golang.org/x/sys/unix"
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)
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type sysctlType uint8
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const (
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sysctlTypeUint32 sysctlType = iota
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sysctlTypeUint64
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)
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type meminfoSysctl struct {
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name string
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dataType sysctlType
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conversion func(uint64) uint64
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}
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func (c *meminfoCollector) getMemInfo() (map[string]float64, error) {
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info := make(map[string]float64)
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tmp32, err := unix.SysctlUint32("vm.stats.vm.v_page_size")
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if err != nil {
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return nil, fmt.Errorf("sysctl(vm.stats.vm.v_page_size) failed: %s", err)
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}
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size := uint64(tmp32)
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fromPage := func(v uint64) uint64 {
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return v * size
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}
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for key, v := range map[string]meminfoSysctl{
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"active_bytes": {"vm.stats.vm.v_active_count", sysctlTypeUint32, fromPage},
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"inactive_bytes": {"vm.stats.vm.v_inactive_count", sysctlTypeUint32, fromPage},
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"wired_bytes": {"vm.stats.vm.v_wire_count", sysctlTypeUint32, fromPage},
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"cache_bytes": {"vm.stats.vm.v_cache_count", sysctlTypeUint32, fromPage},
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"buffer_bytes": {"vfs.bufspace", sysctlTypeUint32, nil},
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"free_bytes": {"vm.stats.vm.v_free_count", sysctlTypeUint32, fromPage},
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"size_bytes": {"vm.stats.vm.v_page_count", sysctlTypeUint32, fromPage},
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"swap_in_bytes_total": {"vm.stats.vm.v_swappgsin", sysctlTypeUint32, fromPage},
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"swap_out_bytes_total": {"vm.stats.vm.v_swappgsout", sysctlTypeUint32, fromPage},
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"swap_size_bytes": {"vm.swap_total", sysctlTypeUint64, nil},
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} {
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var tmp64 uint64
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switch v.dataType {
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case sysctlTypeUint32:
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tmp32, err = unix.SysctlUint32(v.name)
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tmp64 = uint64(tmp32)
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case sysctlTypeUint64:
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tmp64, err = unix.SysctlUint64(v.name)
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}
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if err != nil {
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return nil, err
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}
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if v.conversion != nil {
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// Convert to bytes.
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info[key] = float64(v.conversion(tmp64))
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continue
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}
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info[key] = float64(tmp64)
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}
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return info, nil
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}
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