mirror of
https://github.com/prometheus/node_exporter.git
synced 2024-12-27 06:29:50 -08:00
82 lines
2.3 KiB
Go
82 lines
2.3 KiB
Go
// Copyright 2020 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 !nomeminfo
|
|
// +build !nomeminfo
|
|
|
|
package collector
|
|
|
|
import (
|
|
"golang.org/x/sys/unix"
|
|
"unsafe"
|
|
)
|
|
|
|
const (
|
|
CTL_VFS = 10
|
|
VFS_GENERIC = 0
|
|
VFS_BCACHESTAT = 3
|
|
)
|
|
|
|
type bcachestats struct {
|
|
Numbufs int64
|
|
Numbufpages int64
|
|
Numdirtypages int64
|
|
Numcleanpages int64
|
|
Pendingwrites int64
|
|
Pendingreads int64
|
|
Numwrites int64
|
|
Numreads int64
|
|
Cachehits int64
|
|
Busymapped int64
|
|
Dmapages int64
|
|
Highpages int64
|
|
Delwribufs int64
|
|
Kvaslots int64
|
|
Kvaslots_avail int64
|
|
Highflips int64
|
|
Highflops int64
|
|
Dmaflips int64
|
|
}
|
|
|
|
func (c *meminfoCollector) getMemInfo() (map[string]float64, error) {
|
|
uvmexpb, err := unix.SysctlRaw("vm.uvmexp")
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
mib := [3]_C_int{CTL_VFS, VFS_GENERIC, VFS_BCACHESTAT}
|
|
bcstatsb, err := sysctl(mib[:])
|
|
if err != nil {
|
|
return nil, err
|
|
}
|
|
|
|
uvmexp := *(*unix.Uvmexp)(unsafe.Pointer(&uvmexpb[0]))
|
|
ps := float64(uvmexp.Pagesize)
|
|
|
|
bcstats := *(*bcachestats)(unsafe.Pointer(&bcstatsb[0]))
|
|
|
|
// see uvm(9)
|
|
return map[string]float64{
|
|
"active_bytes": ps * float64(uvmexp.Active),
|
|
"cache_bytes": ps * float64(bcstats.Numbufpages),
|
|
"free_bytes": ps * float64(uvmexp.Free),
|
|
"inactive_bytes": ps * float64(uvmexp.Inactive),
|
|
"size_bytes": ps * float64(uvmexp.Npages),
|
|
"swap_size_bytes": ps * float64(uvmexp.Swpages),
|
|
"swap_used_bytes": ps * float64(uvmexp.Swpginuse),
|
|
"swapped_in_pages_bytes_total": ps * float64(uvmexp.Pgswapin),
|
|
"swapped_out_pages_bytes_total": ps * float64(uvmexp.Pgswapout),
|
|
"wired_bytes": ps * float64(uvmexp.Wired),
|
|
}, nil
|
|
}
|