skydive_prof.go

// +build prof

/*
 * Copyright (C) 2016 Red Hat, Inc.
 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 main

import (
	"log"
	"os"
	"os/signal"
	"runtime/pprof"
	"syscall"

	"github.com/skydive-project/skydive/cmd/skydive"
)

func profile(c chan os.Signal) {
	for {
		<-c
		f, err := os.Create("/tmp/skydive-cpu.prof")
		if err != nil {
			log.Fatal("could not create CPU profile: ", err)
		}
		if err := pprof.StartCPUProfile(f); err != nil {
			log.Fatal("could not start CPU profile: ", err)
		}
		log.Println("CPU profiling Started")
		<-c
		pprof.StopCPUProfile()
		log.Println("CPU profiling Stopped")
	}
}

func main() {
	c := make(chan os.Signal, 1)
	signal.Notify(c, syscall.SIGUSR1)
	go profile(c)

	skydive.RootCmd.Execute()
}