__thread被GNU支持,clang等支持.它在thread_local之前是很有用的…它们之间并不相等,而且一般都被支持.它们之间的不同就是thread_local在访问变量的线程中使用延迟初始化来初始话变量.而__thread并不初始化,您必须手动初始化.所以每一次thread_local都是有开销的,而__thread没有.因为这种低效率,Apple的编译器禁用...
If I need some thread local storage and I might need several entries should I use:Thread.GetData(slot) and Thread.SetData(slot, object)or should I make my own static member like this[ThreadStatic] static Dictionary<String,Object> myItems = new Dictionary<String,Object>;and get things through...
I'm trying to get a minimal example runnable which uses the thread local storage (TLS) support. Thus, I started to study this feature with the help of the ABI manual (https://www.ti.com/lit/an/sprab89a/sprab89a.pdf?ts=1609866389585) providing an entire chapter for TLS (chapter 7)....
This provides a performance benefit over the GD model. Only one call to tls_get_addr() is required per function, to determine the address of dtv0,m. The dynamic TLS offset, bound at link-edit time, is added to the dtv0,m address for each reference. Initial Executable (IE) - static...
thread exploits the performance improvement on multiprocessor by concurrent 相比进程,线程的切换花销更小,可以更容易的共享资源,可以提高等待I/O和处理时的性能,还可以充分发掘多核处理器的计算能力。 线程中的全局变量-TLS Basic understanding of thread
Thread-relative static fields provide better performance than data slots and have the benefit of compile-time type checking. Be aware that any class constructor code will run on the first thread in the first context that accesses the field. In all other threads or contexts in...
如果要用到thread local的class对象: 可以考虑使用 muduo::ThreadLocal<T>和muduo::ThreadLocalSingleton<T>这两个class, 它能在线程退出时销毁class对象 例如用examples/asio/chat/server_threaded_highperformance.cc用ThreadLocalSingleton来保存每个EventLoop线程所管辖的客户连接,以实现高效的消息转发(可以参阅...
The alignment is for performance reasons and using 4 registers for the 1st 4 arguments is more efficient than 4 stack pushes. As there are a large number of API functions and locally written procedures that use 4 or less arguments, register passing using the normal FASTCALL has less overhead...
optimized for the kernel-level security, efficient memory usage, and greater real-time performance that Windows CE-based platforms require. This white paper provides an overview of the Windows CE process and thread-handling capabilities, as they are implemented in Windows CE 3.0. (9 printed pages...
Sets the data in the specified slot on the currently running thread, for that thread's current domain. For better performance, use fields marked with the ThreadStaticAttribute attribute instead.