node_exporter/collector/meminfo_bsd.go

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// Copyright 2015 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.
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// +build freebsd dragonfly
// +build !nomeminfo
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package collector
import (
"fmt"
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"golang.org/x/sys/unix"
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)
func (c *meminfoCollector) getMemInfo() (map[string]float64, error) {
info := make(map[string]float64)
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size, err := unix.SysctlUint32("vm.stats.vm.v_page_size")
if err != nil {
return nil, fmt.Errorf("sysctl(vm.stats.vm.v_page_size) failed: %s", err)
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}
for key, v := range map[string]string{
"active": "vm.stats.vm.v_active_count",
"inactive": "vm.stats.vm.v_inactive_count",
"wire": "vm.stats.vm.v_wire_count",
"cache": "vm.stats.vm.v_cache_count",
"free": "vm.stats.vm.v_free_count",
"swappgsin": "vm.stats.vm.v_swappgsin",
"swappgsout": "vm.stats.vm.v_swappgsout",
"total": "vm.stats.vm.v_page_count",
} {
value, err := unix.SysctlUint32(v)
if err != nil {
return nil, err
}
// Convert metrics to kB (same as Linux meminfo).
info[key] = float64(value) * float64(size)
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}
return info, nil
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}