mirror of
https://github.com/prometheus/node_exporter.git
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76 lines
2.3 KiB
Go
76 lines
2.3 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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//go:build !nomeminfo
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// +build !nomeminfo
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package collector
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// #include <mach/mach_host.h>
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// #include <sys/sysctl.h>
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// typedef struct xsw_usage xsw_usage_t;
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import "C"
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import (
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"encoding/binary"
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"fmt"
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"unsafe"
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"golang.org/x/sys/unix"
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)
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func (c *meminfoCollector) getMemInfo() (map[string]float64, error) {
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host := C.mach_host_self()
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infoCount := C.mach_msg_type_number_t(C.HOST_VM_INFO64_COUNT)
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vmstat := C.vm_statistics64_data_t{}
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ret := C.host_statistics64(
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C.host_t(host),
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C.HOST_VM_INFO64,
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C.host_info_t(unsafe.Pointer(&vmstat)),
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&infoCount,
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)
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if ret != C.KERN_SUCCESS {
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return nil, fmt.Errorf("Couldn't get memory statistics, host_statistics returned %d", ret)
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}
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totalb, err := unix.Sysctl("hw.memsize")
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if err != nil {
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return nil, err
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}
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swapraw, err := unix.SysctlRaw("vm.swapusage")
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if err != nil {
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return nil, err
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}
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swap := (*C.xsw_usage_t)(unsafe.Pointer(&swapraw[0]))
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// Syscall removes terminating NUL which we need to cast to uint64
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total := binary.LittleEndian.Uint64([]byte(totalb + "\x00"))
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var pageSize C.vm_size_t
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C.host_page_size(C.host_t(host), &pageSize)
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ps := float64(pageSize)
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return map[string]float64{
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"active_bytes": ps * float64(vmstat.active_count),
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"compressed_bytes": ps * float64(vmstat.compressor_page_count),
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"inactive_bytes": ps * float64(vmstat.inactive_count),
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"wired_bytes": ps * float64(vmstat.wire_count),
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"free_bytes": ps * float64(vmstat.free_count),
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"swapped_in_bytes_total": ps * float64(vmstat.pageins),
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"swapped_out_bytes_total": ps * float64(vmstat.pageouts),
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"total_bytes": float64(total),
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"swap_used_bytes": float64(swap.xsu_used),
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"swap_total_bytes": float64(swap.xsu_total),
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}, nil
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}
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