func perCPUTimes() ([]CPUTimesStat, error) {
var (
count C.mach_msg_type_number_t
cpuload *C.processor_cpu_load_info_data_t
ncpu C.natural_t
)
status := C.host_processor_info(C.host_t(C.mach_host_self()),
C.PROCESSOR_CPU_LOAD_INFO,
&ncpu,
(*C.processor_info_array_t)(unsafe.Pointer(&cpuload)),
&count)
if status != C.KERN_SUCCESS {
return nil, fmt.Errorf("host_processor_info error=%d", status)
}
// jump through some cgo casting hoops and ensure we properly free
// the memory that cpuload points to
target := C.vm_map_t(C.mach_task_self_)
address := C.vm_address_t(uintptr(unsafe.Pointer(cpuload)))
defer C.vm_deallocate(target, address, C.vm_size_t(ncpu))
// the body of struct processor_cpu_load_info
// aka processor_cpu_load_info_data_t
var cpu_ticks [C.CPU_STATE_MAX]uint32
// copy the cpuload array to a []byte buffer
// where we can binary.Read the data
size := int(ncpu) * binary.Size(cpu_ticks)
buf := C.GoBytes(unsafe.Pointer(cpuload), C.int(size))
bbuf := bytes.NewBuffer(buf)
var ret []CPUTimesStat
for i := 0; i < int(ncpu); i++ {
err := binary.Read(bbuf, binary.LittleEndian, &cpu_ticks)
if err != nil {
return nil, err
}
c := CPUTimesStat{
CPU: fmt.Sprintf("cpu%d", i),
User: float64(cpu_ticks[C.CPU_STATE_USER]) / ClocksPerSec,
System: float64(cpu_ticks[C.CPU_STATE_SYSTEM]) / ClocksPerSec,
Nice: float64(cpu_ticks[C.CPU_STATE_NICE]) / ClocksPerSec,
Idle: float64(cpu_ticks[C.CPU_STATE_IDLE]) / ClocksPerSec,
}
ret = append(ret, c)
}
return ret, nil
}
func (self *CpuList) Get() error {
var count C.mach_msg_type_number_t
var cpuload *C.processor_cpu_load_info_data_t
var ncpu C.natural_t
status := C.host_processor_info(C.host_t(C.mach_host_self()),
C.PROCESSOR_CPU_LOAD_INFO,
&ncpu,
(*C.processor_info_array_t)(unsafe.Pointer(&cpuload)),
&count)
if status != C.KERN_SUCCESS {
return fmt.Errorf("host_processor_info error=%d", status)
}
// jump through some cgo casting hoops and ensure we properly free
// the memory that cpuload points to
target := C.vm_map_t(C.mach_task_self_)
address := C.vm_address_t(uintptr(unsafe.Pointer(cpuload)))
defer C.vm_deallocate(target, address, C.vm_size_t(ncpu))
// the body of struct processor_cpu_load_info
// aka processor_cpu_load_info_data_t
var cpu_ticks [C.CPU_STATE_MAX]uint32
// copy the cpuload array to a []byte buffer
// where we can binary.Read the data
size := int(ncpu) * binary.Size(cpu_ticks)
buf := C.GoBytes(unsafe.Pointer(cpuload), C.int(size))
bbuf := bytes.NewBuffer(buf)
self.List = make([]Cpu, 0, ncpu)
for i := 0; i < int(ncpu); i++ {
cpu := Cpu{}
err := binary.Read(bbuf, binary.LittleEndian, &cpu_ticks)
if err != nil {
return err
}
cpu.User = uint64(cpu_ticks[C.CPU_STATE_USER])
cpu.Sys = uint64(cpu_ticks[C.CPU_STATE_SYSTEM])
cpu.Idle = uint64(cpu_ticks[C.CPU_STATE_IDLE])
cpu.Nice = uint64(cpu_ticks[C.CPU_STATE_NICE])
self.List = append(self.List, cpu)
}
return nil
}
// stolen from https://github.com/cloudfoundry/gosigar
func getCPUDetailedTimes() ([]CPUTimesStat, error) {
var count C.mach_msg_type_number_t
var cpuload *C.processor_cpu_load_info_data_t
var ncpu C.natural_t
status := C.host_processor_info(C.host_t(C.mach_host_self()),
C.PROCESSOR_CPU_LOAD_INFO,
&ncpu,
(*C.processor_info_array_t)(unsafe.Pointer(&cpuload)),
&count)
if status != C.KERN_SUCCESS {
return nil, fmt.Errorf("host_processor_info error=%d", status)
}
// jump through some cgo casting hoops and ensure we properly free
// the memory that cpuload points to
target := C.vm_map_t(C.mach_task_self_)
address := C.vm_address_t(uintptr(unsafe.Pointer(cpuload)))
defer C.vm_deallocate(target, address, C.vm_size_t(ncpu))
// the body of struct processor_cpu_load_info
// aka processor_cpu_load_info_data_t
var cpu_ticks = make([]uint32, C.CPU_STATE_MAX)
// copy the cpuload array to a []byte buffer
// where we can binary.Read the data
size := int(ncpu) * binary.Size(cpu_ticks)
buf := C.GoBytes(unsafe.Pointer(cpuload), C.int(size))
bbuf := bytes.NewBuffer(buf)
var ret []CPUTimesStat = make([]CPUTimesStat, 0, ncpu+1)
for i := 0; i < int(ncpu); i++ {
err := binary.Read(bbuf, binary.LittleEndian, &cpu_ticks)
if err != nil {
return nil, err
}
cpu := CPUTimesStat{
CPU: strconv.Itoa(i)}
fillCPUStats(cpu_ticks, &cpu)
ret = append(ret, cpu)
}
return ret, nil
}
func (c *statCollector) Update(ch chan<- prometheus.Metric) error {
var (
count C.mach_msg_type_number_t
cpuload *C.processor_cpu_load_info_data_t
ncpu C.natural_t
)
status := C.host_processor_info(C.host_t(C.mach_host_self()),
C.PROCESSOR_CPU_LOAD_INFO,
&ncpu,
(*C.processor_info_array_t)(unsafe.Pointer(&cpuload)),
&count)
if status != C.KERN_SUCCESS {
return fmt.Errorf("host_processor_info error=%d", status)
}
// jump through some cgo casting hoops and ensure we properly free
// the memory that cpuload points to
target := C.vm_map_t(C.mach_task_self_)
address := C.vm_address_t(uintptr(unsafe.Pointer(cpuload)))
defer C.vm_deallocate(target, address, C.vm_size_t(ncpu))
// the body of struct processor_cpu_load_info
// aka processor_cpu_load_info_data_t
var cpu_ticks [C.CPU_STATE_MAX]uint32
// copy the cpuload array to a []byte buffer
// where we can binary.Read the data
size := int(ncpu) * binary.Size(cpu_ticks)
buf := (*[1 << 30]byte)(unsafe.Pointer(cpuload))[:size:size]
bbuf := bytes.NewBuffer(buf)
for i := 0; i < int(ncpu); i++ {
err := binary.Read(bbuf, binary.LittleEndian, &cpu_ticks)
if err != nil {
return err
}
for k, v := range map[string]int{
"user": C.CPU_STATE_USER,
"system": C.CPU_STATE_SYSTEM,
"nice": C.CPU_STATE_NICE,
"idle": C.CPU_STATE_IDLE,
} {
ch <- prometheus.MustNewConstMetric(c.cpu, prometheus.CounterValue, float64(cpu_ticks[v])/ClocksPerSec, "cpu"+strconv.Itoa(i), k)
}
}
return nil
}