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pmon.go
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pmon.go
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/*
* Copyright 2020, 2021, 2022 Hewlett Packard Enterprise Development LP
* Other additional copyright holders may be indicated within.
*
* The entirety of this work is 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.
*/
package switchtec
import (
"unsafe"
)
type BandwidthType int
const (
Raw_BandwidthType BandwidthType = 0
Payload_BandwidthType = 1
)
type BandwidthCounterDirectional struct {
Posted uint64
Completion uint64
NonPosted uint64
}
type BandwidthCounter struct {
TimeInMicroseconds uint64
Egress BandwidthCounterDirectional
Ingress BandwidthCounterDirectional
}
func (from *BandwidthCounter) Subtract(c *BandwidthCounter) {
from.TimeInMicroseconds -= c.TimeInMicroseconds
from.Egress.Posted -= c.Egress.Posted
from.Egress.NonPosted -= c.Egress.NonPosted
from.Egress.Completion -= c.Egress.Completion
from.Ingress.Posted -= c.Ingress.Posted
from.Ingress.NonPosted -= c.Ingress.NonPosted
from.Ingress.Completion -= c.Ingress.Completion
}
func (d *BandwidthCounterDirectional) Total() uint64 {
return d.Posted + d.NonPosted + d.Completion
}
// Set Bandwidth Type for particular physical ports in the system
func (dev *Device) BandwidthCounterSetMany(physPortIds []int, bwType BandwidthType) error {
type port struct {
Id uint8
BwType uint8
}
cmd := struct {
SubCmd uint8
Count uint8 `structex:"countOf='Ports'"`
Ports [maxPorts]port `structex:"truncate"`
}{
SubCmd: uint8(SetBandwidthCounterSubCommand),
Count: uint8(len(physPortIds)),
}
for i := range physPortIds {
cmd.Ports[i] = port{
Id: uint8(physPortIds[i]),
BwType: uint8(bwType),
}
}
return dev.RunCommand(PerformanceMonitorCommand, cmd, nil)
}
// Set Bandwidth Type performance monitor for all ports in the system
func (dev *Device) BandwidthCounterSetAll(bwType BandwidthType) error {
ports, err := dev.LinkStat()
if err != nil {
return err
}
ids := make([]int, len(ports))
for i := range ports {
ids[i] = int(ports[i].PhysPortId)
}
return dev.BandwidthCounterSetMany(ids, bwType)
}
type BandwidthCounterPort struct {
Id uint8
Clear uint8
}
type BandwidthCounterCommand struct {
SubCmd uint8
Count uint8 `structex:"countOf='Ports'"`
Ports [maxPorts]BandwidthCounterPort `structex:"truncate"`
}
const (
MaxBandwidthCounterPorts = uint8((maxDataLength - int(unsafe.Sizeof(BandwidthCounterCommand{}))) / int(unsafe.Sizeof(BandwidthCounter{})))
)
func (dev *Device) BandwidthCounterMany(physPortIds []uint8, clear bool) ([]BandwidthCounter, error) {
cmd := BandwidthCounterCommand{
SubCmd: uint8(GetBandwidthCounterSubCommand),
}
remain := len(physPortIds)
physPortIdIdx := 0
clearFunc := func(clear bool) uint8 {
if clear {
return 1
}
return 0
}
results := []BandwidthCounter{}
for remain != 0 {
cmd.Count = uint8(remain)
if cmd.Count > MaxBandwidthCounterPorts {
cmd.Count = MaxBandwidthCounterPorts
}
for i := 0; i < int(cmd.Count); i++ {
cmd.Ports[i] = BandwidthCounterPort{
Id: physPortIds[physPortIdIdx+i],
Clear: clearFunc(clear),
}
}
type PerformanceMonitorResponse struct {
Counters [MaxBandwidthCounterPorts]BandwidthCounter
}
rsp := PerformanceMonitorResponse{}
if err := dev.RunCommand(PerformanceMonitorCommand, cmd, &rsp); err != nil {
return nil, err
}
remain -= int(cmd.Count)
physPortIdIdx += int(cmd.Count)
results = append(results, rsp.Counters[:cmd.Count]...)
}
return results, nil
}
func (dev *Device) BandwidthCounterAll(clear bool) ([]PortId, []BandwidthCounter, error) {
ports, err := dev.Status()
if err != nil {
return nil, nil, err
}
physPortIds := make([]uint8, len(ports))
for i := range ports {
physPortIds[i] = ports[i].PhysPortId
}
results, err := dev.BandwidthCounterMany(physPortIds, clear)
return ports, results, err
}