mirror of https://github.com/k3s-io/k3s
75 lines
2.0 KiB
Go
75 lines
2.0 KiB
Go
// +build libpfm,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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// Manager of perf events for containers.
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package perf
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import (
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"fmt"
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"os"
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info "github.com/google/cadvisor/info/v1"
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"github.com/google/cadvisor/stats"
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)
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type manager struct {
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events PerfEvents
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numCores int
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topology []info.Node
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stats.NoopDestroy
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}
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func NewManager(configFile string, numCores int, topology []info.Node) (stats.Manager, error) {
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if configFile == "" {
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return &stats.NoopManager{}, nil
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}
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file, err := os.Open(configFile)
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if err != nil {
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return nil, fmt.Errorf("Unable to read configuration file %q: %q", configFile, err)
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}
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config, err := parseConfig(file)
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if err != nil {
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return nil, fmt.Errorf("Unable to read configuration file %q: %q", configFile, err)
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}
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if areGroupedEventsUsed(config) {
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return nil, fmt.Errorf("event grouping is not supported you must modify config file at %s", configFile)
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}
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return &manager{events: config, numCores: numCores, topology: topology}, nil
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}
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func areGroupedEventsUsed(events PerfEvents) bool {
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for _, group := range events.Core.Events {
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if len(group) > 1 {
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return true
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}
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}
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return false
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}
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func (m *manager) GetCollector(cgroupPath string) (stats.Collector, error) {
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collector := newCollector(cgroupPath, m.events, m.numCores, m.topology)
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err := collector.setup()
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if err != nil {
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collector.Destroy()
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return &stats.NoopCollector{}, err
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}
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return collector, nil
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}
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