github.com/aigarnetwork/aigar@v0.0.0-20191115204914-d59a6eb70f8e/metrics/cpu_syscall.go (about)

     1  //  Copyright 2018 The go-ethereum Authors
     2  //  Copyright 2019 The go-aigar Authors
     3  //  This file is part of the go-aigar library.
     4  //
     5  //  The go-aigar library is free software: you can redistribute it and/or modify
     6  //  it under the terms of the GNU Lesser General Public License as published by
     7  //  the Free Software Foundation, either version 3 of the License, or
     8  //  (at your option) any later version.
     9  //
    10  //  The go-aigar library is distributed in the hope that it will be useful,
    11  //  but WITHOUT ANY WARRANTY; without even the implied warranty of
    12  //  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    13  //  GNU Lesser General Public License for more details.
    14  //
    15  //  You should have received a copy of the GNU Lesser General Public License
    16  //  along with the go-aigar library. If not, see <http://www.gnu.org/licenses/>.
    17  
    18  // +build !windows
    19  
    20  package metrics
    21  
    22  import (
    23  	"syscall"
    24  
    25  	"github.com/AigarNetwork/aigar/log"
    26  )
    27  
    28  // getProcessCPUTime retrieves the process' CPU time since program startup.
    29  func getProcessCPUTime() int64 {
    30  	var usage syscall.Rusage
    31  	if err := syscall.Getrusage(syscall.RUSAGE_SELF, &usage); err != nil {
    32  		log.Warn("Failed to retrieve CPU time", "err", err)
    33  		return 0
    34  	}
    35  	return int64(usage.Utime.Sec+usage.Stime.Sec)*100 + int64(usage.Utime.Usec+usage.Stime.Usec)/10000 //nolint:unconvert
    36  }