What is Tlsindex?

With thread local storage (TLS), you can provide unique data for each thread that the process can access using a global index. One thread allocates the index, which can be used by the other threads to retrieve the unique data associated with the index.

How does thread_ local work?

In C++, thread_local is defined as a specifier to define the thread-local data and this data is created when the thread is created and destroyed when the thread is also destroyed, hence this thread-local data is known as thread-local storage.

What is TLS memory?

Thread-local storage (TLS) is a computer programming method that uses static or global memory local to a thread.

What is threadLocal in Java?

The ThreadLocal class is used to create thread local variables which can only be read and written by the same thread. For example, if two threads are accessing code having reference to same threadLocal variable then each thread will not see any modification to threadLocal variable done by other thread.

What is ELF TLS?

The ELF Thread Local Storage ABI (TLS) is a storage model for variables that allows each thread to have a unique copy of a global variable. This model is used to implement C++’s thread_local storage model. On thread creation the variable will be given its initial value from the initial TLS image.

What is Pthread_key_create?

The pthread_key_create() function shall create a thread-specific data key visible to all threads in the process. Key values provided by pthread_key_create() are opaque objects used to locate thread-specific data.

What is threading local?

Thread-local data is data whose values are thread specific. To manage thread-local data, just create an instance of local (or a subclass) and store attributes on it: mydata = threading.local() mydata.x = 1. The instance’s values will be different for separate threads.

What is thread cache?

The Malloc Thread Cache maintains a per-thread pool of unallocated memory for the purpose of reducing contention for the global heap structures. This cache attempts to preallocate memory pieces for future use according to the pattern of allocations already performed by the thread.

Is thread local storage slow?

TLS is always going to be slow relative to simple access. Accessing TLS globals in a tight loop is going to be slow, too. Try caching the TLS value in a temporary instead.