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54 lines
1.4 KiB
54 lines
1.4 KiB
// Copyright 2019 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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//go:build linux
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// +build linux
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package linux
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import (
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"golang.org/x/sys/unix"
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"syscall"
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)
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// OSVersion returns version info of operation system.
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// e.g. Linux 4.15.0-45-generic.x86_64
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func OSVersion() (osVersion string, err error) {
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var un syscall.Utsname
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err = syscall.Uname(&un)
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if err != nil {
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return
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}
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charsToString := func(ca []int8) string {
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s := make([]byte, len(ca))
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var lens int
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for ; lens < len(ca); lens++ {
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if ca[lens] == 0 {
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break
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}
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s[lens] = uint8(ca[lens])
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}
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return string(s[0:lens])
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}
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osVersion = charsToString(un.Sysname[:]) + " " + charsToString(un.Release[:]) + "." + charsToString(un.Machine[:])
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return
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}
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// SetAffinity sets cpu affinity.
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func SetAffinity(cpus []int) error {
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var cpuSet unix.CPUSet
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cpuSet.Zero()
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for _, c := range cpus {
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cpuSet.Set(c)
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}
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return unix.SchedSetaffinity(unix.Getpid(), &cpuSet)
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}
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