XEON PHI

TOPICS

• • • • • • What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi Performance Applications

What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi Performance

WHAT ARE MULTICORE PROCESSORS?

Applications

What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi Performance

WHAT ARE MULTICORE PROCESSORS?

Applications

What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi Performance

WHAT ARE MULTICORE PROCESSORS?

Applications

What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi Performance

WHAT ARE MULTICORE PROCESSORS?

• Advantages: • I/O latency reduction – many operations are performed inside the die • • • Power efficiency – a dual core processor will require less power than 2 single core processors.

Area reduction – more common circuitry yields less redundancy.

Higher performance – utilizing parallel coding techniques allows for an increase in overall performance.

Applications

What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi Performance

WHAT ARE MULTICORE PROCESSORS?

• Disadvantages: • Parallelization overhead – the take advantage of multiple cores an adequate OS and optimized application code is needed. • • SW development difficulties – multiple cores and threads increase the difficulty of code development.

HW development difficulties – integrating multicore chips reduce production yield in comparison to the less dense single chip designs.

Applications

What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi

INTEL’S MIC ARCHITECTURE

• The Larrabee project (2006) • Originally designed for GPU purposes.

• Introduced very wide 512-bit SIMD units to the x86 processor design.

• • • • Cache coherence multiprocessor system Up to 4 threads per core Ultra-wide ring memory bus Project was terminated on may 2010

Performance Applications

What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi Performance

XEON PHI!

• The Larrabee project gave birth to the Xeon Phi family of processors: • Knights Ferry (May 2010) • • 32 cores, up to 750 GFLOPS Knights Corner (Nov. 2011) • • 60 cores, up to 1.2 TFLOPS Knights Landing (June 2013) • 72 cores, up to 3 TFLOPS!!!

Applications

What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi Performance Applications

What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi Performance

PROGRAMING FOR XEON PHI (MIC)

• Programing for a MIC processor is almost transparent in comparison to normal CPU’s • Standard programing languages: C/C++ and Fortran • Standard parallel programming tools: OpenMP & MPI • MPI can be executed on both host and on the coprocessor • • Any code can run on MIC, not just kernels Optimizing for MIC is similar to optimizing for normal CPUs

Applications

What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi Performance

XEON PHI VS. NVIDIA TESLA

Criteria

HPC programming Threading MPI support Code types

Xeon Phi

C++/C/Fortran/OpenCL OpenMP, Multithreading Host and coprocessor Serial, scripts, etc…

Tesla

CUDA/OpenCL Hardware threads Host only Kernel

Applications

What are multicore processors?

Intel MIC architecture

PERFORMANCE

Xeon Phi Programming for Xeon Phi Performance Applications

What are multicore processors?

Intel MIC architecture

PERFORMANCE

Xeon Phi Programming for Xeon Phi Performance Applications

What are multicore processors?

Intel MIC architecture

PERFORMANCE

Xeon Phi Programming for Xeon Phi Performance Applications

What are multicore processors?

Intel MIC architecture

PERFORMANCE

Xeon Phi Programming for Xeon Phi Performance Applications

What are multicore processors?

Intel MIC architecture

APPLICATIONS

Xeon Phi Programming for Xeon Phi Performance Applications

What are multicore processors?

Intel MIC architecture Xeon Phi Programming for Xeon Phi Performance Applications

SUPERCOMPUTING

• • Xeon Phi provide 8 out of 10 PFLOPS of “Stampede” super computer.

Tianhe-2, 2013’s world’s fastest SC, is based on Knights Corner technology

BIBLIOGRAPHY

• • • • • • • www.wikipedia.com

www.extremetech.com

www.intel.com www.tacc.utexas.edu

www.upi.com

www.nvidia.com

www1.cse.wustl.edu