35 lines
691 B
Go
35 lines
691 B
Go
package main
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import (
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"fmt"
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"runtime"
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"sync"
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"time"
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)
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func main() {
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runtime.GOMAXPROCS(1)
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var wg sync.WaitGroup
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startTime := time.Now()
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// 4个CPU密集型任务（不释放P）
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for i := 0; i < 4; i++ {
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wg.Add(1)
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go func(id int) {
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defer wg.Done()
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taskStart := time.Now()
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// 模拟1秒CPU密集型计算（不释放P）
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end := time.Now().Add(1 * time.Second)
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for time.Now().Before(end) {
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// 空循环，持续占用CPU
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}
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taskDuration := time.Since(taskStart)
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fmt.Printf("任务%d：自身耗时：%v，完成时间：%v\n",
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id, taskDuration, time.Since(startTime))
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}(i)
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}
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wg.Wait()
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fmt.Printf("总耗时：%v\n", time.Since(startTime))
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}
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