Earlier we learned how to use static shared memory. In this tutorial, we'll explain how to use the dynamic version of shared memory to improve the performance.
## Introduction:
As we mentioned earlier that Memory bottlenecks is the main problem why we are not able to get the highest performance, therefore minimizing the latency for memory access plays prominent role in application optimization. In this tutorial, we'll learn how to use dynamic shared memory.
Programmers familiar with CUDA, OpenCL will be able to quickly learn and start coding with the HIP API. In case you are not, don't worry. You choose to start with the best one. We'll be explaining everything assuming you are completely new to gpgpu programming.
We will be using the Simple Matrix Transpose application from the previous tutorial and modify it to learn how to use shared memory.
## Shared Memory
Shared memory is way more faster than that of global and constant memory and accessible to all the threads in the block. For In the same sourcecode, we will use the `HIP_DYNAMIC_SHARED` keyword to declare dynamic shared memory as follows:
` HIP_DYNAMIC_SHARED(float, sharedMem) `
here the first parameter is the data type while the second one is the variable name.
- [HIP Terminology](https://github.com/ROCm-Developer-Tools/HIP/docs/markdown/hip_terms.md) (including Rosetta Stone of GPU computing terms across CUDA/HIP/HC/AMP/OpenL)
