When copying data from global to local memory, you often see code like below (1D data): [raw] if (get_group_id(0)==0) { for (int i=0; i < N; i++) { data_local[i] = data_global[offset+i] } } mem_fence(CLK_LOCAL_MEM_FENCE); [/raw] This can be replaced this with an asynchronous copy with the function async_work_group_copy, which results in more manageable and cleaner code. The

Valgrind is a great tool for finding possible memory leaks in code written in C, C++, Java, Perl, Python, assembly code, Fortran, Ada, etc. I use it to check out if the provided code is ok, before I start porting it to GPU-code. It finds one of those devils in the details. But also for

You can’t ignore accelerators when designing a new cluster for HPC anymore. Back in 2010 I suggested to use GPUs to enter the Top 500 with a budget of only €38k. It takes ten times more now, as almost everybody started to use accelerators. To get into the November top 500 would roughly take a

At Intel they have CPUs (Xeon, Ivy Bridge), GPUs (Isis) and Accelerators (Xeon Phi). OpenCL enables each processor to be used to the fullest and they now promote it as such. Watch the below video and see their view on why OpenCL makes a difference for Intel’s customers. This is important, because till recently Intel

Khronos just announced three OpenCL based releases:  SYCL 1.2 Provisional Spec – Abstraction Layer for Leveraging C++ and OpenCL WebCL 1.0 Final Spec – JavaScript bindings to OpenCL OpenCL 2.0 Adopters Program – Conformance for OpenCL 2.0 implementations Below I’ve quoted the summaries. For each of these I’ve prepared articles, but due to lack of

Khronos just sent out the below message to Press and Game Developers. To my understanding, there are many game devs under the readers of this blog, so I’d like you to share the message with you. JOIN KHRONOS GROUP AT GDC 2014 SAN FRANCISCO Press Conference, Technology Sessions and Refreshment OasisWe invite you to attend

This article actually discusses the question: is GPGPU a solution for the masses, or is it for niche-products? For the latter open standards matter a lot less, as you will read. If you watch the below video on sale&marketing by Victor Antonio, then you get what is so difficult about open standards: It pushes all