github.com/MetalBlockchain/subnet-evm@v0.4.9/metrics/cputime_unix.go (about)

     1  // (c) 2022, Ava Labs, Inc.
     2  //
     3  // This file is a derived work, based on the go-ethereum library whose original
     4  // notices appear below.
     5  //
     6  // It is distributed under a license compatible with the licensing terms of the
     7  // original code from which it is derived.
     8  //
     9  // Much love to the original authors for their work.
    10  // **********
    11  // Copyright 2018 The go-ethereum Authors
    12  // This file is part of the go-ethereum library.
    13  //
    14  // The go-ethereum library is free software: you can redistribute it and/or modify
    15  // it under the terms of the GNU Lesser General Public License as published by
    16  // the Free Software Foundation, either version 3 of the License, or
    17  // (at your option) any later version.
    18  //
    19  // The go-ethereum library is distributed in the hope that it will be useful,
    20  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    21  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    22  // GNU Lesser General Public License for more details.
    23  //
    24  // You should have received a copy of the GNU Lesser General Public License
    25  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    26  
    27  //go:build !windows && !js
    28  // +build !windows,!js
    29  
    30  package metrics
    31  
    32  import (
    33  	syscall "golang.org/x/sys/unix"
    34  
    35  	"github.com/ethereum/go-ethereum/log"
    36  )
    37  
    38  // getProcessCPUTime retrieves the process' CPU time since program startup.
    39  func getProcessCPUTime() int64 {
    40  	var usage syscall.Rusage
    41  	if err := syscall.Getrusage(syscall.RUSAGE_SELF, &usage); err != nil {
    42  		log.Warn("Failed to retrieve CPU time", "err", err)
    43  		return 0
    44  	}
    45  	return int64(usage.Utime.Sec+usage.Stime.Sec)*100 + int64(usage.Utime.Usec+usage.Stime.Usec)/10000 //nolint:unconvert
    46  }