Menu
Apart from the __syncthreads() function(s) which synchronizes the warps within a thread block, theres another function called __syncwarp(). What exactly does this function do?
The cuda programming guide says,
will cause the executing thread to wait until all warp lanes named in mask have executed a __syncwarp() (with the same mask) before resuming execution. All non-exited threads named in mask must execute a corresponding __syncwarp() with the same mask, or the result is undefined.
Executing __syncwarp() guarantees memory ordering among threads participating in the barrier. Thus, threads within a warp that wish to communicate via memory can store to memory, execute __syncwarp(), and then safely read values stored by other threads in the warp.
So does this mean that this function ensures synchronization in threads within a warp that is included by the mask? If so, do we need such synchronization within the threads in the same warp since they all are ensured to be executed in lockstep?
891
Java - Thread Synchronization. Each object in Java is associated with a monitor, which a thread can lock or unlock. Only one thread at a time may hold a lock on a monitor. Java programming language provides a very handy way of creating threads and synchronizing their task by using synchronized blocks. You keep shared resources within this block.
Synchronizing data for multithreading. When multiple threads can make calls to the properties and methods of a single object, it is critical that those calls be synchronized. Otherwise one thread might interrupt what another thread is doing, and the object could be left in an invalid state.
The .NET class library provides a number of classes for synchronizing threads. See Overview of Synchronization Primitives. You can use the Monitor class or a compiler keyword to synchronize blocks of code, instance methods, and static methods. There is no support for synchronized static fields.
Learn about .NET thread synchronization primitives used to synchronize access to a shared resource or control thread interaction See how unhandled exceptions are handled in .NET. Most unhandled thread exceptions proceed naturally and lead to application termination. Provides a mechanism that synchronizes access to objects.
This feature is available on CUDA 9 and yes it synchronizes all threads within a warp and useful for divergent warps. This is useful for Volta architecture in which threads within a warp can be scheduled separately.
100
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
