49 lines
1.1 KiB
Go
49 lines
1.1 KiB
Go
package main
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import (
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"log"
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"net/http"
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_ "net/http/pprof" // 注册pprof HTTP端点
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"os"
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"runtime"
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"runtime/trace"
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"time"
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)
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// simulateAlloc 模拟高频内存分配
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func simulateAlloc() {
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for {
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_ = make([]byte, 1*1024*1024) // 每次分配1MB
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time.Sleep(10 * time.Millisecond)
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}
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}
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func main() {
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// 1. 启动trace追踪，输出到文件
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f, err := os.Create("gc_trace.out")
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if err != nil {
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log.Fatalf("创建trace文件失败: %v", err)
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}
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defer f.Close()
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trace.Start(f)
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defer trace.Stop()
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// 2. 启动pprof HTTP服务（端口6060）
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go func() {
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log.Println("pprof服务启动: http://localhost:6060/debug/pprof/")
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log.Fatal(http.ListenAndServe(":6060", nil))
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}()
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// 3. 模拟内存分配压力
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go simulateAlloc()
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// 4. 运行30秒，积累诊断数据
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log.Println("程序将运行30秒，可访问pprof分析GC...")
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time.Sleep(30 * time.Second)
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// 5. 打印最终GC状态
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var stats runtime.MemStats
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runtime.ReadMemStats(&stats)
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log.Printf("运行结束，GC总次数: %d，累计STW时长: %d ms", stats.NumGC, stats.PauseTotalNs/1e6)
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}
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