获取线程上下文切换次数？？？

2013-01-09 11:22:26 364 阅读 AI 写同款 · GEO 优化AI 选题数据监测一键分发 ›

STM32CUBEIDE调试中HardFault_Handler崩溃的故障分析器实战解析本文详细解析STM32CUBEIDE调试中HardFault_Handler崩溃问题的实战处理方法。通过内置故障分析器自动诊断硬件异常原因，如内存越界、堆栈溢出等，提供图形化界面简化调试流程，并分享配置步骤、典型案例及高级调试技巧，帮助开发者快速定位和解决嵌入式系统崩溃问题。阅读详情

在一些程序的性能测试中，需要知道线程的上下文切换次数，请教大家如何获取程序中线程的上下文切换次数？

...全文

Transformer模型详解（图解最完整版） Transformer由论文提出，现在是谷歌云TPU推荐的参考模型。论文相关的Tensorflow的代码可以从GitHub获取，其作为Tensor2Tensor包的一部分。哈佛的NLP团队也实现了一个基于PyTorch的版本，并注释该论文。在本文中，我们将试图把模型简化一点，并逐一介绍里面的核心概念，希望让普通读者也能轻易理解。Transformer 与 RNN 不同，可以比较好地并行训练。阅读详情

sdudubing

其它技术问题 3,881 成员 9,044 内容

+ 关注 + 加入社区

切换为时间正序

sdudubing 2013-01-09

打赏
举报

自己顶下了！！！

赵4老师 2013-01-09

打赏
举报

仅供参考 Windows NT Performance Counters －－－－－ Thread Object The Thread performance object consists of counters that measure aspects of thread behavior. A thread is the basic object that executes instructions on a processor. All running processes have at least one thread. Processor Time Processor Time is the percentage of elapsed time that this thread used the processor to execute instructions. An instruction is the basic unit of execution in a processor, and a thread is the object that executes instructions. Code executed to handle some hardware interrupts and trap conditions are included in this count. Detail Level: Novice Counter Type: PERF_100NSEC_TIMER % User Time User Time is the percentage of elapsed time that this thread has spent executing code in user mode. Applications, environment subsystems, and integral subsystems execute in user mode. Code executing in user mode cannot damage the integrity of the Windows NT Executive, Kernel, and device drivers. Unlike some early operating systems, Windows NT uses process boundaries for subsystem protection in addition to the traditional protection of user and privileged modes. These subsystem processes provide additional protection. Therefore, some work done by Windows NT on behalf of your application might appear in other subsystem processes in addition to the privileged time in your process. Detail Level: Advanced Counter Type: PERF_100NSEC_TIMER % Privileged Time Privileged Time is the percentage of elapsed time that this thread has spent executing code in privileged mode. When a Windows NT system service is called, the service will often run in privileged mode in order to gain access to system-private data. Such data is protected from access by threads executing in user mode. Calls to the system can be explicit or implicit, such as page faults or interrupts. Unlike some early operating systems, Windows NT uses process boundaries for subsystem protection in addition to the traditional protection of user and privileged modes. These subsystem processes provide additional protection. Therefore, some work done by Windows NT on behalf of your application might appear in other subsystem processes in addition to the privileged time in your process. Detail Level: Advanced Counter Type: PERF_100NSEC_TIMER Context Switches/sec Context Switches/sec is the rate of switches from one thread to another. Thread switches can occur either inside of a single process or across processes. A thread switch can be caused either by one thread asking another for information, or by a thread being preempted by another, higher priority thread becoming ready to run. Unlike some early operating systems, Windows NT uses process boundaries for subsystem protection in addition to the traditional protection of user and privileged modes. These subsystem processes provide additional protection. Therefore, some work done by Windows NT on behalf of an application might appear in other subsystem processes in addition to the privileged time in the application. Switching to the subsystem process causes one context switch in the application thread. Switching back causes another context switch in the subsystem thread. Detail Level: Advanced Counter Type: PERF_COUNTER_COUNTER Elapsed Time The total elapsed time (in seconds) this thread has been running. Detail Level: Advanced Counter Type: PERF_ELAPSED_TIME Priority Current The current dynamic priority of this thread. The system can raise the thread's dynamic priority above the base priority if the thread is handling user input, or lower it towards the base priority if the thread becomes compute bound. Detail Level: Advanced Counter Type: PERF_COUNTER_RAWCOUNT Priority Base The current base priority of this thread. The system can raise the thread's dynamic priority above the base priority if the thread is handling user input, or lower it towards the base priority if the thread becomes compute bound. Detail Level: Advanced Counter Type: PERF_COUNTER_RAWCOUNT Start Address Starting virtual address for this thread. Detail Level: Wizard Counter Type: PERF_COUNTER_RAWCOUNT Thread State Thread State is the current state of the thread. It is 0 for Initialized, 1 for Ready, 2 for Running, 3 for Standby, 4 for Terminated, 5 for Wait, 6 for Transition, 7 for Unknown. A Running thread is using a processor; a Standby thread is about to use one. A Ready thread wants to use a processor, but is waiting for a processor because none are free. A thread in Transition is waiting for a resource in order to execute, such as waiting for its execution stack to be paged in from disk. A Waiting thread has no use for the processor because it is waiting for a peripheral operation to complete or a resource to become free. Detail Level: Wizard Counter Type: PERF_COUNTER_RAWCOUNT Thread Wait Reason Thread Wait Reason is only applicable when the thread is in the Wait state (see Thread State.) It is 0 or 7 when the thread is waiting for the Executive, 1 or 8 for a Free Page, 2 or 9 for a Page In, 3 or 10 for a Pool Allocation, 4 or 11 for an Execution Delay, 5 or 12 for a Suspended condition, 6 or 13 for a User Request, 14 for an Event Pair High, 15 for an Event Pair Low, 16 for an LPC Receive, 17 for an LPC Reply, 18 for Virtual Memory, 19 for a Page Out; 20 and higher are not assigned at the time of this writing. Event Pairs are used to communicate with protected subsystems (see Context Switches.) Detail Level: Wizard Counter Type: PERF_COUNTER_RAWCOUNT ID Process ID Process is the unique identifier of this process. ID Process numbers are reused, so they only identify a process for the lifetime of that process. Detail Level: Wizard Counter Type: PERF_COUNTER_RAWCOUNT ID Thread ID Thread is the unique identifier of this thread. ID Thread numbers are reused, so they only identify a thread for the lifetime of that thread. Detail Level: Wizard Counter Type: PERF_COUNTER_RAWCOUNT －－－－－ Thread Details Object Thread Details performance object consists of counters that measure aspects of thread behavior that are difficult or time-consuming to collect. These counters are distinguished from those in the Thread performance object by their high overhead. User PC Current User Program Counter for this thread. Detail Level: Wizard Counter Type: PERF_COUNTER_RAWCOUNT

获取线程上下文切换次数？？？

相关推荐