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// +build libpfm,cgo
// Copyright 2020 Google Inc. All Rights Reserved.
//
// 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.
// Manager of perf events for containers.
package perf
import (
"fmt"
"os"
info "github.com/google/cadvisor/info/v1"
"github.com/google/cadvisor/stats"
"github.com/google/cadvisor/utils/sysinfo"
)
type manager struct {
events PerfEvents
onlineCPUs []int
cpuToSocket map[int]int
stats.NoopDestroy
}
func NewManager(configFile string, topology []info.Node) (stats.Manager, error) {
if configFile == "" {
return &stats.NoopManager{}, nil
}
file, err := os.Open(configFile)
if err != nil {
return nil, fmt.Errorf("unable to read configuration file %q: %w", configFile, err)
}
config, err := parseConfig(file)
if err != nil {
return nil, fmt.Errorf("unable to parse configuration file %q: %w", configFile, err)
}
onlineCPUs := sysinfo.GetOnlineCPUs(topology)
cpuToSocket := make(map[int]int)
for _, cpu := range onlineCPUs {
cpuToSocket[cpu] = sysinfo.GetSocketFromCPU(topology, cpu)
}
return &manager{events: config, onlineCPUs: onlineCPUs, cpuToSocket: cpuToSocket}, nil
}
func (m *manager) GetCollector(cgroupPath string) (stats.Collector, error) {
collector := newCollector(cgroupPath, m.events, m.onlineCPUs, m.cpuToSocket)
err := collector.setup()
if err != nil {
collector.Destroy()
return &stats.NoopCollector{}, err
}
return collector, nil
}
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