99 lines
3.5 KiB
Go
99 lines
3.5 KiB
Go
// +build libipmctl,cgo
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// Copyright 2020 Google Inc. All Rights Reserved.
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//
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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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package machine
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// #cgo pkg-config: libipmctl
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// #include <nvm_management.h>
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import "C"
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import (
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"fmt"
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info "github.com/google/cadvisor/info/v1"
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"k8s.io/klog"
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)
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// getNVMAvgPowerBudget retrieves configured power budget
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// (in watts) for NVM devices. When libipmct is not available
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// zero is returned.
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func getNVMAvgPowerBudget() (uint, error) {
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// Get number of devices on the platform
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// see: https://github.com/intel/ipmctl/blob/v01.00.00.3497/src/os/nvm_api/nvm_management.h#L1478
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var count C.uint
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err := C.nvm_get_number_of_devices(&count)
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if err != C.NVM_SUCCESS {
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klog.Warningf("Unable to get number of NVM devices. Status code: %d", err)
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return uint(0), fmt.Errorf("Unable to get number of NVM devices. Status code: %d", err)
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}
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// Load basic device information for all the devices
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// to obtain UID of the first one.
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var devices = make([]C.struct_device_discovery, count)
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err = C.nvm_get_devices(&devices[0], C.uchar(count))
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if err != C.NVM_SUCCESS {
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klog.Warningf("Unable to get all NVM devices. Status code: %d", err)
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return uint(0), fmt.Errorf("Unable to get all NVM devices. Status code: %d", err)
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}
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// Power budget is same for all the devices
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// so we can rely on any of them.
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var device C.struct_device_details
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err = C.nvm_get_device_details(&devices[0].uid[0], &device)
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if err != C.NVM_SUCCESS {
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uid := C.GoString(&devices[0].uid[0])
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klog.Warningf("Unable to get details of NVM device %q. Status code: %d", uid, err)
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return uint(0), fmt.Errorf("Unable to get details of NVM device %q. Status code: %d", uid, err)
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}
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return uint(device.avg_power_budget / 1000), nil
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}
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// getNVMCapacities retrieves the total NVM capacity in bytes for memory mode and app direct mode
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func getNVMCapacities() (uint64, uint64, error) {
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var caps C.struct_device_capacities
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err := C.nvm_get_nvm_capacities(&caps)
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if err != C.NVM_SUCCESS {
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klog.Warningf("Unable to get NVM capacity. Status code: %d", err)
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return uint64(0), uint64(0), fmt.Errorf("Unable to get NVM capacity. Status code: %d", err)
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}
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return uint64(caps.memory_capacity), uint64(caps.app_direct_capacity), nil
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}
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// GetNVMInfo returns information specific for non-volatile memory modules
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func GetNVMInfo() (info.NVMInfo, error) {
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nvmInfo := info.NVMInfo{}
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// Initialize libipmctl library.
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cErr := C.nvm_init()
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if cErr != C.NVM_SUCCESS {
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klog.Warningf("libipmctl initialization failed with status %d", cErr)
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return info.NVMInfo{}, fmt.Errorf("libipmctl initialization failed with status %d", cErr)
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}
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defer C.nvm_uninit()
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var err error
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nvmInfo.MemoryModeCapacity, nvmInfo.AppDirectModeCapacity, err = getNVMCapacities()
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if err != nil {
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return info.NVMInfo{}, fmt.Errorf("Unable to get NVM capacities, err: %s", err)
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}
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nvmInfo.AvgPowerBudget, err = getNVMAvgPowerBudget()
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if err != nil {
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return info.NVMInfo{}, fmt.Errorf("Unable to get NVM average power budget, err: %s", err)
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}
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return nvmInfo, nil
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}
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