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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.
// +build !nomeminfo
package collector
// #include <mach/mach_host.h>
// #include <sys/sysctl.h>
// typedef struct xsw_usage xsw_usage_t;
import "C"
import (
"encoding/binary"
"fmt"
"unsafe"
"golang.org/x/sys/unix"
)
func (c *meminfoCollector) getMemInfo() (map[string]float64, error) {
host := C.mach_host_self()
infoCount := C.mach_msg_type_number_t(C.HOST_VM_INFO64_COUNT)
vmstat := C.vm_statistics64_data_t{}
ret := C.host_statistics64(
C.host_t(host),
C.HOST_VM_INFO64,
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
}
swapraw, err := unix.SysctlRaw("vm.swapusage")
if err != nil {
return nil, err
}
swap := (*C.xsw_usage_t)(unsafe.Pointer(&swapraw[0]))
// Syscall removes terminating NUL which we need to cast to uint64
total := binary.LittleEndian.Uint64([]byte(totalb + "\x00"))
var pageSize C.vm_size_t
C.host_page_size(C.host_t(host), &pageSize)
ps := float64(pageSize)
return map[string]float64{
"active_bytes": ps * float64(vmstat.active_count),
"compressed_bytes": ps * float64(vmstat.compressor_page_count),
"inactive_bytes": ps * float64(vmstat.inactive_count),
"wired_bytes": ps * float64(vmstat.wire_count),
"free_bytes": ps * float64(vmstat.free_count),
"swapped_in_bytes_total": ps * float64(vmstat.pageins),
"swapped_out_bytes_total": ps * float64(vmstat.pageouts),
"total_bytes": float64(total),
"swap_used_bytes": float64(swap.xsu_used),
"swap_total_bytes": float64(swap.xsu_total),
}, nil
}
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