英文:
How to Disable transparent huge page in Golang Code?
问题
有没有办法让我的进程不使用透明巨大页面，而只是更改整个操作系统（Linux）的配置？
英文:
Is there a way for my processes not to use transparent huge page instead of just changing the configuration of the entire operating system(Linux)?
答案1
得分: 1
你可以按照下面的示例进行操作。应该进行彻底的测试，以确保与Go运行时没有不良交互。
package main
import (
"fmt"
"log"
"os"
"os/exec"
"runtime"
"syscall"
)
const (
// https://filippo.io/linux-syscall-table/
PRCTL_SYSCALL = 157
// see /usr/include/linux/prctl.h
PR_SET_THP_DISABLE = 41
PR_GET_THP_DISABLE = 42
)
func disableTHP() {
_, _, errno := syscall.RawSyscall6(uintptr(PRCTL_SYSCALL), uintptr(PR_SET_THP_DISABLE), uintptr(1), 0, 0, 0, 0)
if errno != 0 {
log.Fatalf("禁用THP失败：%v", errno)
}
}
func isTHPDisabled() bool {
s, _, errno := syscall.RawSyscall6(uintptr(PRCTL_SYSCALL), uintptr(PR_GET_THP_DISABLE), 0, 0, 0, 0, 0)
if errno != 0 {
log.Fatalf("获取THP禁用状态失败：%v", errno)
}
return s == 1
}
func main() {
if os.Getenv("X_IN_CHILD_PROC") == "" {
runtime.LockOSThread()
disableTHP()
cmd := exec.Command(os.Args[0], os.Args...)
cmd.Env = append(os.Environ(), fmt.Sprintf("X_IN_CHILD_PROC=yes"))
cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
_ = cmd.Run() // 错误被丢弃
os.Exit(cmd.ProcessState.ExitCode())
}
// 下面的代码已禁用THP
if !isTHPDisabled() { // 检查一下
log.Fatal("THP未被禁用")
}
fmt.Println("THP已禁用")
fmt.Println("你好，世界")
}
英文:
You can do it like shown below. You should test thoroughly to ensure there are no ill interactions with the go runtime.
package main
import (
"fmt"
"log"
"os"
"os/exec"
"runtime"
"syscall"
)
const (
// https://filippo.io/linux-syscall-table/
PRCTL_SYSCALL = 157
// see /usr/include/linux/prctl.h
PR_SET_THP_DISABLE = 41
PR_GET_THP_DISABLE = 42
)
func disableTHP() {
_, _, errno := syscall.RawSyscall6(uintptr(PRCTL_SYSCALL), uintptr(PR_SET_THP_DISABLE), uintptr(1), 0, 0, 0, 0)
if errno != 0 {
log.Fatalf("failed to disable THP: %v", errno)
}
}
func isTHPDisabled() bool {
s, _, errno := syscall.RawSyscall6(uintptr(PRCTL_SYSCALL), uintptr(PR_GET_THP_DISABLE), 0, 0, 0, 0, 0)
if errno != 0 {
log.Fatalf("failed get THP disable status: %v", errno)
}
return s == 1
}
func main() {
if os.Getenv("X_IN_CHILD_PROC") == "" {
runtime.LockOSThread()
disableTHP()
cmd := exec.Command(os.Args[0], os.Args...)
cmd.Env = append(os.Environ(), fmt.Sprintf("X_IN_CHILD_PROC=yes"))
cmd.Stdin, cmd.Stdout, cmd.Stderr = os.Stdin, os.Stdout, os.Stderr
_ = cmd.Run() // err discarded
os.Exit(cmd.ProcessState.ExitCode())
}
// code below has THP disabled
if !isTHPDisabled() { // sanity check
log.Fatal("THP is somehow not disabled")
}
fmt.Println("THP is disabled")
fmt.Println("hello world")
}
通过集体智慧和协作来改善编程学习和解决问题的方式。致力于成为全球开发者共同参与的知识库，让每个人都能够通过互相帮助和分享经验来进步。
评论