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26089ffde0
* fix: make condition eval compatible with go 1.18 * fix: update circle-ci image to yunion/centos-build:go-1.18.3-0 * update go,mod go version to 1.18 * update vendor Co-authored-by: Qiu Jian <qiujian@yunionyun.com>
numcpus
Package numcpus provides information about the number of CPUs in the system.
It gets the number of CPUs (online, offline, present, possible, configured or kernel maximum) on Linux, Darwin, FreeBSD, NetBSD, OpenBSD, DragonflyBSD or Solaris/Illumos systems.
On Linux, the information is retrieved by reading the corresponding CPU
topology files in /sys/devices/system/cpu.
On BSD systems, the information is retrieved using the hw.ncpu and
hw.ncpuonline sysctls, if supported.
Not all functions are supported on Darwin, FreeBSD, NetBSD, OpenBSD, DragonflyBSD and Solaris/Illumos. ErrNotSupported is returned in case a function is not supported on a particular platform.
Usage
package main
import (
"fmt"
"os"
"github.com/tklauser/numcpus"
)
func main() {
online, err := numcpus.GetOnline()
if err != nil {
fmt.Fprintf(os.Stderr, "GetOnline: %v\n", err)
}
fmt.Printf("online CPUs: %v\n", online)
possible, err := numcpus.GetPossible()
if err != nil {
fmt.Fprintf(os.Stderr, "GetPossible: %v\n", err)
}
fmt.Printf("possible CPUs: %v\n", possible)
}