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Xeon Phi Programming
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• Xeon Phi Architecture Overview
• Xeon Phi Programming Model
– Programming Model Overview
– Message Passing Interface (MPI) on Intel® Xeon Phi™
coprocessor
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Intel Xeon Phi Coprocessors and the MIC
Architecture
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Intel Xeon Phi Coprocessors
and the MIC Architecture
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Theoretical Maximum
(Intel® Xeon® processor E5-2670 vs. Intel®
Xeon Phi™ coprocessor 5110P & SE10P/X)
Single
Precision
Memory
Bandwidth
Double
Precision
(GF/s)
(GB/s)
(GF/s)
Up to 3.2x
Up to 3.45x
Up to 3.2x
Higher is Better
1200
2,147
Higher is Better
2,022
1,074
1,011
2000
Higher is Better
350
352
320
1000
300
800
1500
250
200
600
1000
400
666
150
333
100
500
102
200
50
0
E5-2670
(2x 2.6GHz, 8C,
115W)
5110P
(60C,
1.053GHz,
225W)
SE10P/X
(61C, 1.1GHz,
300W)
0
E5-2670
(2x 2.6GHz, 8C,
115W)
5110P
(60C,
1.053GHz,
225W)
5
SE10P/X
(61C, 1.1GHz,
300W)
0
E5-2670
5110P
SE10P/X
(2x 2.6GHz, 8C, (60C, 1.053GHz, (61C, 1.1GHz,
115W)
225W)
300W)
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Interacting with Intel Xeon Phi coprocessors
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micsmc: Real-TimeMonitoring Tool
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• Xeon Phi Architecture Overview
• Xeon Phi Programming Model
– Programming Model Overview
– Message Passing Interface (MPI) on Intel® Xeon Phi™
coprocessor
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A Process Viewpoint of the Intel® MIC
Architecture Enabled Compute Continuum
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• Xeon Phi Architecture Overview
• Xeon Phi Programming Model
– Programming Model Overview
– Message Passing Interface (MPI) on Intel® Xeon Phi™
coprocessor
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Intel® MIC Architecture Native Compilation
Communication
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Coprocessor only Programming Model
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Coprocessor only Programming Model
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MPI+Offload Programming Model
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MPI+Offload Programming Model
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Symmetric Programming Model
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Symmetric Programming Model
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Cluster example
Sample machinefile:
snode1:16
snode1-mic0:60
snode1-mic1:60
snode2:16
snode2-mic0:60
snode2-mic1:60
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INTEL MPI example
# sudo scp /opt/intel/impi/4.1.1.036/mic/bin/* mic0:/bin/
mpiexec 100% 1061KB 1.0MB/s 00:00
pmi_proxy 100% 871KB 871.4KB/s 00:00
...
# sudo scp /opt/intel/impi/4.1.1.036/mic/lib/* mic0:/lib64/
libmpi.so.4.1 100% 4391KB 4.3MB/s 00:00
libmpigf.so.4.1 100% 321KB 320.8KB/s 00:00
libmpigc4.so.4.1 100% 175KB 175.2KB/s 00:00
...
# sudo scp /opt/intel/composer_xe_2013.4.183/compiler/lib/mic/*
mic0:/lib64/
libimf.so 100% 2516KB 2.5MB/s 00:01
libsvml.so 100% 4985KB 4.9MB/s 00:01
libintlc.so.5 100% 128KB 128.1KB/s 00:00
...
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INTEL MPI example
Before compiling , establish the proper environment settings for the
compiler and for the Intel MPI Library for Intel® Xeon Phi™ Coprocessor
# source /opt/intel/composer_xe_2013.4.183/bin/compilervars.sh intel64
# source /opt/intel/impi/4.1.1.036/ bin64/mpivars.sh
Build the application montecarlo.mic for the coprocessor:
# mpiicc –mmic montecarlo.c -o montecarlo.mic
Build the application for the host:
# mpiicc montecarlo.c -o montecarlo.host
Upload the application montecarlo.mic to the /tmp directory on the
coprocessors using the scp command.
# sudo scp ./montecarlo.mic mic0:/tmp/montecarlo.mic
Enable the MPI communication between host and coprocessors:
# export I_MPI_MIC=enable
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Thank You.
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Q&A
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