Question

好的，我正在使用ThreadPool来启动线程。在threaad代码中，我试图弄清楚它实际使用的cpu时间。我读过有ProcessThread。 TotalProcessorTime属性（http://msdn.microsoft.com/en-us/library/system.diagnostics.processthread.totalprocessortime.aspx）但我无法阅读它。那么我如何获得当前线程？

Answer 1

我一直在尝试同样的事情......了解特定线程消耗了多少cpu。在下面的代码中，我能够识别正在执行WorkHard的当前线程。但是，变量intitialTicks和finalTicks在执行难以计算的函数之前和之后都有currentProcessThread.TotalProcessorTime.Ticks，但两者都保持相同的值，因此差值为零

    public void WorkHard()
    {
        long initialTicks, finalTicks, deltaTicks;
        byte f;
        bool threadFound;

        ProcessThreadCollection currentProcessThreads;
        ProcessThread currentProcessThread = null;

        int m_currentThreadId = kernel32.GetCurrentThreadId();

        while (m_keepWorking)
        {
            f = (byte)rnd.Next(31);
            System.Threading.Thread.Sleep(f*25);
            threadFound = false;
            currentProcessThreads = Process.GetCurrentProcess().Threads;

            foreach (ProcessThread t in currentProcessThreads)
            {
                if (t.Id == m_currentThreadId)
                {
                    currentProcessThread = t;
                    threadFound = true;
                    break;
                }
            }

            initialTicks = threadFound ? currentProcessThread.TotalProcessorTime.Ticks : 0; 
            fibonacci(f);
            finalTicks = threadFound ? currentProcessThread.TotalProcessorTime.Ticks : 0;
            deltaTicks = finalTicks - initialTicks;
            lock (workerLogFile.BaseStream)
            {
                workerLogFile.WriteLine(string.Concat(m_minionName, " finished calculating fib(", f.ToString(), ") at ", DateTime.Now.ToString("yyyy.MM.dd HH:mm:ss.ffff"), " on threadId[", m_currentThreadId.ToString(), "]. Process required ", finalTicks.ToString()," - ", initialTicks.ToString()," = ", deltaTicks.ToString(), " ticks"));
            }

            OnMinionDoneEvent(new minionEventArgs(String.Concat(m_minionName, ", on thread ", m_currentThreadId.ToString("000000"), ", done working on Fibonacci(", f.ToString(), ")"), finalTicks - initialTicks));
        }
        lock (workerLogFile.BaseStream)
        {
            workerLogFile.WriteLine(string.Concat(m_minionName, " called to rest at ", DateTime.Now.ToString("yyyy.MM.dd HH:mm:ss.ffff"), " on threadId[", m_currentThreadId.ToString(), "]."));
        }

Answer 2

一些小说：

1）通过ProcessThread获取正确的进程线程。 TotalProcessorTime您需要本机线程ID

2）听起来非常类似于您将托管线程ID（通过Thread.CurrentThread.Name）与本机线程ID进行比较，以通过System.Diagnostics命名空间获取当前线程。请记住托管线程ID！= ProcessThreadID。您需要使用GetCurrentThreadId函数http://msdn.microsoft.com/en-us/library/ms683183(VS.85).aspx

3）线程池线程可以被回收，因此线程池的TotalProcessorTime可能比你预期的要大

4）如果您分析线程使用情况，可能更容易在Visual Studio Ultimate中使用线程分析器，或者使用其他优秀的分析器（即ANTS，DotTrace，SciTech）

如何获取当前线程的ProcessThread.TotalProcessorTime

2 个答案: