mirror of
https://gitcode.com/JianFeeeee/HomeAgent.git
synced 2026-09-22 09:58:06 +00:00
304cad0648
- docs/zh/架构迁移评估.md: C ABI→子进程+共享内存完整迁移论证(1621行) - docs/zh/experiments/: 18项可复跑可行性实验(架构评估的所有数字来源) - plan.md §11: 11.1~11.9 插件架构缺陷修复清单(唯一权威编号) - main 保持干净,本批次为 update 特性分支的整改起点
61 lines
1.9 KiB
Go
61 lines
1.9 KiB
Go
//go:build ignore
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package main
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import (
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"encoding/binary"
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"fmt"
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"os"
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"os/exec"
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"time"
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"unsafe"
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"golang.org/x/sys/unix"
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)
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func main() {
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fmt.Println("=== 实验 2：跨进程 eventfd 通知 + 共享内存偏移解引用 ===")
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// eventfd 不带 CLOEXEC（需要被子进程继承）
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efd, err := unix.Eventfd(0, unix.EFD_NONBLOCK)
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if err != nil { panic(err) }
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evtFile := os.NewFile(uintptr(efd), "evt")
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// shm: 用 memfd（匿名，无需 /dev/shm 清理）
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mfd, err := unix.MemfdCreate("stagectx", 0)
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if err != nil { panic(err) }
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if err := unix.Ftruncate(mfd, 4096); err != nil { panic(err) }
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shmFile := os.NewFile(uintptr(mfd), "shm")
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data, err := unix.Mmap(mfd, 0, 4096, unix.PROT_READ|unix.PROT_WRITE, unix.MAP_SHARED)
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if err != nil { panic(err) }
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fmt.Printf("PARENT: mmap 基址 = %p\n", unsafe.Pointer(&data[0]))
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// 写 payload 到 arena(偏移 1024)，头部记描述符
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msg := "hello-from-parent-via-offset"
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copy(data[1024:], []byte(msg))
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binary.LittleEndian.PutUint32(data[0:4], 1024)
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binary.LittleEndian.PutUint32(data[4:8], uint32(len(msg)))
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binary.LittleEndian.PutUint64(data[8:16], 42)
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fmt.Printf("PARENT: 数据已落地 arena@1024, 描述符 {off:1024, len:%d, seq:42}\n", len(msg))
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cmd := exec.Command("go", "run", "exp2_child.go")
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cmd.ExtraFiles = []*os.File{evtFile, shmFile} // → 子进程 fd 3, 4
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cmd.Stdout, cmd.Stderr = os.Stdout, os.Stderr
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if err := cmd.Start(); err != nil { panic(err) }
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time.Sleep(3 * time.Second) // 等 go run 编译+启动
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fmt.Println("PARENT: 数据到位后 post eventfd（不等待消费者）")
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t0 := time.Now()
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evtFile.Write([]byte{1,0,0,0,0,0,0,0})
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fmt.Printf("PARENT: post 耗时 %v ← post-and-forget\n", time.Since(t0))
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cmd.Wait()
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// 读子进程回写
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off := binary.LittleEndian.Uint32(data[16:20])
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ln := binary.LittleEndian.Uint32(data[20:24])
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if ln > 0 {
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fmt.Printf("PARENT: 读到子进程回写 → %q ✅ 双向可见\n", string(data[off:off+ln]))
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}
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}
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