node_exporter/collector/meminfo_darwin.go
2017-01-03 11:22:46 +01:00

60 lines
1.9 KiB
Go

// 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.
// +build !nomeminfo
package collector
// #include <mach/mach_host.h>
import "C"
import (
"encoding/binary"
"fmt"
"syscall"
"unsafe"
"golang.org/x/sys/unix"
)
func (c *meminfoCollector) getMemInfo() (map[string]float64, error) {
infoCount := C.mach_msg_type_number_t(C.HOST_VM_INFO_COUNT)
vmstat := C.vm_statistics_data_t{}
ret := C.host_statistics(
C.host_t(C.mach_host_self()),
C.HOST_VM_INFO,
C.host_info_t(unsafe.Pointer(&vmstat)),
&infoCount,
)
if ret != C.KERN_SUCCESS {
return nil, fmt.Errorf("Couldn't get memory statistics, host_statistics returned %d", ret)
}
totalb, err := unix.Sysctl("hw.memsize")
if err != nil {
return nil, err
}
// Syscall removes terminating NUL which we need to cast to uint64
total := binary.LittleEndian.Uint64([]byte(totalb + "\x00"))
ps := C.natural_t(syscall.Getpagesize())
return map[string]float64{
"active_bytes_total": float64(ps * vmstat.active_count),
"inactive_bytes_total": float64(ps * vmstat.inactive_count),
"wired_bytes_total": float64(ps * vmstat.wire_count),
"free_bytes_total": float64(ps * vmstat.free_count),
"swapped_in_pages_total": float64(ps * vmstat.pageins),
"swapped_out_pages_total": float64(ps * vmstat.pageouts),
"bytes_total": float64(total),
}, nil
}