HSA Version 1.0 arrived today
Subject: General Tech | March 17, 2015 - 01:18 PM | Jeremy Hellstrom
Tagged: hsa foundation, hsa, amd, arm, Samsung, Imagination Technologies, HSAIL
We have been talking about the HSA foundation since 2013, a cooperative effort by AMD, ARM, Imagination, Samsung, Qualcomm, MediaTek and TI to design a heterogeneous memory architecture to allow GPUs, DSPs and CPUs to all directly access the same physical memory. The release of the official specifications today are a huge step forward for these companies, especially for garnering future mobile market share as physical hardware apart from Carrizo becomes available.
Programmers will be able to use C, C++, Fortran, Java, and Python to write HSA-compliant code which is then compiled into HSAIL (Heterogeneous System Architecture Intermediate Language) and from there to the actual binary executables which will run on your devices. HSA currently supports x86 and x64 and there are Linux kernel patches available for those who develop on that OS. Intel and NVIDIA are not involved in this project at all, they have chosen their own solutions for mobile devices and while Intel certainly has pockets deep enough to experiment NVIDIA might not. We shall soon see if Pascal and improvements Maxwell's performance and efficiency through future generations can compete with the benefits of HSA.
The current problem is of course hardware, Bald Eagle and Carrizo are scheduled to arrive on the market soon but currently they are not available. Sea Islands GPUs and Kaveri have some HSA enhancements but with limited hardware to work with it will be hard to convince developers to focus on programming HSA optimized applications. The release of the official specs today is a great first step; if you prefer an overview to reading through the official documents The Register has a good article right here.
"The HSA Foundation today officially published version 1.0 of its Heterogeneous System Architecture specification, which (if we were being flippant) describes how GPUs, DSPs and CPUs can share the same physical memory and pass pointers between each other. (A provisional 1.0 version went live in August 2014.)"
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