github.com/testinprod-io/op-erigon@v1.9.6/metrics/cpu_syscall.go (about)

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