mirror of https://github.com/containers/podman.git
d9c388e2fe
Instead of trying to write out own code to do basic process operations (e.g. checking if a PID is still running in a multi-OS friendly manner), use shirou/gopsutil, a multi-platform library that should abstract all the complexity away. Unlike our previous approach on Windows, this one should actually work. Signed-off-by: Matt Heon <mheon@redhat.com> |
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| .. | ||
| .cirrus.yml | ||
| LICENSE | ||
| README.md | ||
| numcpus.go | ||
| numcpus_bsd.go | ||
| numcpus_linux.go | ||
| numcpus_solaris.go | ||
| numcpus_unsupported.go | ||
| numcpus_windows.go | ||
README.md
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)
}