OpenCL for heterogeneous reconfigurable systems programming

The open standard OpenCL for heterogeneous reconfigurable systems programming Alexey Shmatok <alexey.shmatok@gmail.com> activedaily.blogspot.com

What's OpenCL, for what purpose this standard? Application (App) Application Programming Interface (API) CS CS CS CS (type 1) (type 2) (type 3) (type N) ... MCPU GPU FPGA *** 2 activedaily.blogspot.com

Who is supporting OpenCL? ● NVIDIA ● ATI-AMD ● IBM ● Apple ● Intel ● ... 3 activedaily.blogspot.com

What's described by OpenCL, main concept? ● Platform model ● Execution model ● Memory model ● Programming model - data parallel - task parallel - combination data & task parallel ● ... 4 activedaily.blogspot.com

Platform model 5 activedaily.blogspot.com

Renaissance of co-processor concept CU1 CU2 H SW ... CUn 6 activedaily.blogspot.com

Big systems ”into the clouds” H2 ux u1 u2 ... ... H1 uy u1 Hm uz u2 u1 u2 7 activedaily.blogspot.com

Execution model ● Host-system program (host) - OpenCL API, C/C++, ... ● Programs of execution units (kernels) - C99 with some restrictions & extensions 8 activedaily.blogspot.com

Interoperability (API, SDK) //Host //kernels int main(...) __kernel k1(...) { {…} ... API __kernel k2(...) SDK {...} // OpenCL API Calls Runtime ... Libs Utils Compiler Driver etc.. } Host OS Compute Units program 9 activedaily.blogspot.com

Memory model 10 activedaily.blogspot.com

Memories of compute unit __global, __local, __constant & __private P P P P P P P P P k k ... k k k ... k k k ... k ... L L L G/C Compute Unit __kernel void k(...) #include <CL/cl.h> { ... __global int *ptr; int main() ... main { } ... H iBuf=clCreateBuffer(.) ... oBuf=clCreateBuffer(.) ... 11 activedaily.blogspot.com }

Programming model ● Data parallelism ● Task parallelism ● Combination (data & task parallel) GPU Multi-Core CPU Combination 12 activedaily.blogspot.com

Synchronization (barrier,mem_fence) Single Group (1 thread) (n-threads) PM ... BARRIER LM ... 13 activedaily.blogspot.com

N-dimension space (NDRange) __kernel void k1( ) { int x = get_global_id(0); int y = get_global_id(1); ... } 14 activedaily.blogspot.com

Example (kernel) // scalar void mul (int n, float *a,float *b,float *c) { for(int i=0;i<n;i++) c[i] = a[i] * b[i]; // parallel } __kernel void mul ( __global const float *a, __global const float *b, __global float *c) { int i = get_global_id(0); c[i] = a[i] * b[i]; } 15 activedaily.blogspot.com

OpenCL SDK ● NVIDIA (GPU, Nexus) ● ATI-AMD (GPU,CPU x86) ● IBM (CPU,ppc) ● Apple (XCode) 16 activedaily.blogspot.com

«Hardware» OpenCL Multi-Core CPU GPU FPGA Nano-electronic devices 17 activedaily.blogspot.com

Programmable devices application development (FPGA) Universal Algorithm synthesizer FPGA HDL 0120h 18 activedaily.blogspot.com

“Enhancement” Universal synthesizer C-to-HDL Synthesis, place & route Algorithm translator* FPGA C* HDL 0120h 19 activedaily.blogspot.com

FPGA programming based on OpenCL Special syntesizer Synthesis, place & route Algorithm FPGA C OpenCL 0120h FPGA SDK 20 activedaily.blogspot.com

OpenCL Algorithm OpenCL MCPU SDK GPU SDK FPGA SDK Future SDK 21 activedaily.blogspot.com

OpenCL FPGA SDK ● «Real-time» synthesis, (“HPC”- system required) ● Specially optimized algorithm ● Library of specially optimized components ● SDKs (utilities) 22 activedaily.blogspot.com

GPU, FPGA, Nano* 0.1K-0.5K 10K-700K >1G Components Cores Logic Cells 23 activedaily.blogspot.com

Nano-electronic devices Fragment from wikipedai article about nanoelectroinic devices: Single molecule devices are another possibility. These schemes would make heavy use of molecular self-assembly, designing the device components to construct a larger structure or even a complete system on their own. This can be very useful for reconfigurable computing, and may even completely replace present FPGA technology. Устройства на базе одной молекулы это другая возможность. В таких схемах может быть максимально использован механизм молекулярной само-сборки при создании компонентов устройств для конструирования больших структур или даже целых систем. Такой подход может быть очень полезен для “реконфигурирумого компьютинга”, и даже может полностью заместить нынешние технологии ПЛИС. 24 activedaily.blogspot.com

OCL-FPGA SDK road-map :) Q1-Q2 2010 Prototype (concept) v0.x Q3-Q4 2010 Test version (beta) v1.0 Q1-Q2 2011 Stable version (stable) v1.0 Q3-Q4 2011 Test version (beta) v2.0 Q1-Q2 2012 Stable version (stable) v2.0 ... 25 activedaily.blogspot.com

Questions ??? activedaily.blogspot.com or google:fpga+opencl nanoelectronics+opencl Alexey Shmatok <alexey.shmatok@gmail.com> 26 activedaily.blogspot.com

OpenCL for heterogeneous reconfigurable systems programming

by activedaily on Dec 17, 2009

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OpenCL for heterogeneous reconfigurable systems programming — Presentation Transcript