Scaling Out Python* To HPC and Big Data · NumPy* and SciPy* Continuous Improvement •MKL-level...
Transcript of Scaling Out Python* To HPC and Big Data · NumPy* and SciPy* Continuous Improvement •MKL-level...
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Scaling Out Python* To HPC and Big Data
Sergey MaidanovSoftware Engineering Manager for
Intel® Distribution for Python*
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What Problems We Solve: Scalable Performance
Make Python usable beyond prototyping environment by scaling out to HPC and Big Data environments
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What Problems We Solve: Ease of Use
4
“Any articles I found on your site that related to actually using the MKL for compiling something were overly technical. I couldn't figure out what the heck some of the things were doing or talking about.“ – Intel® Parallel Studio
2015 Beta Survey Response
https://software.intel.com/en-us/forums/intel-math-kernel-library/topic/280832
https://software.intel.com/en-us/articles/building-numpyscipy-with-intel-mkl-and-intel-fortran-on-windows
https://software.intel.com/en-us/articles/numpyscipy-with-intel-mkl
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Why Yet Another Python Distribution?
Intel® Xeon® Processors Intel® Xeon Phi™ Product Family
Configuration Info: apt/atlas: installed with apt-get, Ubuntu 16.10, python 3.5.2, numpy 1.11.0, scipy 0.17.0; pip/openblas: installed with pip, Ubuntu 16.10, python 3.5.2, numpy 1.11.1, scipy 0.18.0; Intel Python: Intel Distribution for Python 2017;. Hardware: Xeon: Intel Xeon CPU E5-2698 v3 @ 2.30 GHz (2 sockets, 16 cores each, HT=off), 64 GB of RAM, 8 DIMMS of 8GB@2133MHz; Xeon Phi: Intel Intel® Xeon Phi™ CPU 7210 1.30 GHz, 96 GB of RAM, 6 DIMMS of 16GB@1200MHz
Software and workloads used in performance tests may have been optimized for performance only on Intel microprocessors. Performance tests, such as SYSmark and MobileMark, are measured using specific computer systems, components, software, operations and functions. Any change to any of those factors may cause the results to vary. You should consult other information and performance tests to assist you in fully evaluating your contemplated purchases, including the performance of that product when combined with other products. * Other brands and names are the property of their respective owners. Benchmark Source: Intel Corporation
Optimization Notice: Intel’s compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. Notice revision #20110804 .
Mature AVX2 instructions based product New AVX512 instructions based product
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Scaling To HPC & Big Data Environments• Hardware and software efficiency crucial in production (Perf/Watt, etc.)
• Efficiency = Parallelism– Instruction Level Parallelism with effective memory access patterns– SIMD– Multi-threading– Multi-node
Roofline Performance Model*
Arithmetic Intensity
SpMVBLAS1
Stencils
FFT
BLAS3 Particle Methods
Low High
Gfl
op
/s
Peak Gflop/s
* Roofline Performance Model https://crd.lbl.gov/departments/computer-science/PAR/research/roofline/
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Efficiency = Parallelism and Python?• CPython as interpreter inhibits parallelism but…
• … Overall Python tools evolved far toward unlocking parallelism
Native extensions numpy*, scipy*, scikit-learn* accelerated with Intel® MKL, Intel® DAAL,
Intel® IPP
Composable multi-threading with Intel®
TBB and Dask*
Multi-nodeparallelism with
mpi4py* accelerated with Intel® MPI*
Language extensions for vectorization &
multi-threading(Cython*, Numba*)
Integration with Big Data platforms and Machine Learning frameworks (pySpark*, Theano*, TensorFlow*, etc.)
Mixed language profiling with Intel® VTune™ Amplifier
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Composable Multi-Threading With Intel® TBB
• Amhdal’s law suggests extracting parallelism at all levels
• If software components do not coordinate on threads use it may lead to oversubscription
• Intel TBB dynamically balances HW thread loads and effectively manages oversubscription
• Intel engineers extended Cpython* and Numba* thread pools with support of Intel® TBB
>python –m TBB myapp.py
ApplicationComponent 1
Component N
Subcomponent 1
Subcomponent 2
Subcomponent K
Subcomponent 1
Subcomponent M
Subcomponent 1
Subcomponent 1
Subcomponent 1
Subcomponent 1
Subcomponent 1
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MKL
TBB
DAAL
pyDAALNumPySciPy TBB
JoblibDask
Application
Pyt
ho
n p
acka
ges
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libs
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Composable Multi-Threading Example: Batch QR Performance
Numpy1.00x
Numpy0.22x
Numpy0.47x
Dask0.61x
Dask0.89x
Dask1.46x
0.0x
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Default MKL Serial MKL Intel® TBB
Speedup relative to Default Numpy*
Intel® MKL, OpenMP* threading
Intel® MKL, Serial
Intel® MKL, Intel® TBB threading
Over-subscription
App-level parallelism
only
TBB-composable
nested parallelism
System info: 32x Intel(R) Xeon(R) CPU E5-2698 v3 @ 2.30GHz, disabled HT, 64GB RAM; Intel(R) MKL 2017.0 Beta Update 1 Intel(R) 64 architecture, Intel(R) AVX2; Intel(R)TBB 4.4.4; Ubuntu 14.04.4 LTS; Dask 0.10.0; Numpy 1.11.0.
Software and workloads used in performance tests may have been optimized for performance only on Intel microprocessors. Performance tests, such as SYSmarkand MobileMark, are measured using specific computer systems, components, software, operations and functions. Any change to any of those factors may cause the results to vary. You should consult other information and performance tests to assist you in fully evaluating your contemplated purchases, including the performance of that product when combined with other products. * Other brands and names are the property of their respective owners. Benchmark Source: Intel Corporation
Optimization Notice: Intel’s compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. Notice revision #20110804 .
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NumPy* and SciPy* Continuous Improvement
• MKL-level performance for dense linear algebra and FFT
• NumPy random, umath & NumExpr* exploit SIMD and multi-threading out-of-the-box
• Better memory allocation and copy in NumPy
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Numpy - U1+TBB
Numpy - U1-opt+TBB
Intel Python 2017U1
Intel Python 2017U1.14X
See system configuration details on the next slide
MO
PS
Does not scale beyond 16K options
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NumExpr* Scalability: Black-Scholes Formula
System info: 32x Intel® Xeon® CPU E5-2698 v3 @ 2.30GHz, disabled HT, 64GB RAM; Intel® Distribution for Python* 2017 Update
Software and workloads used in performance tests may have been optimized for performance only on Intel microprocessors. Performance tests, such as SYSmark and MobileMark, are measured using specific computer systems, components, software, operations and functions. Any change to any of those factors may cause the results to vary. You should consult other information and performance tests to assist you in fully evaluating your contemplated purchases, including the performance of that product when combined with other products. * Other brands and names are the property of their respective owners. Benchmark Source: Intel Corporation
Optimization Notice: Intel’s compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. Notice revision #20110804 .
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Black-Scoles Formula with NumExpr*
What’s a magic?
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Cython* Scalability: Black-Scholes Formula
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Black-Scholes Formula: NumExpr* vs. Cython*
Cython-parallel - U1-opt+TBB Numexpr-opt - U1-opt+TBB
75% of native C
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Skt-Learn* Optimizations With Intel® MKL... And Intel® DAAL
0x
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3x
4x
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9x
Approximateneighbors
Fast K-means GLM GLM net LASSO Lasso path Least angleregression,OpenMP
Non-negativematrix
factorization
Regression bySGD
Samplingwithout
replacement
SVD
Speedups of Scikit-Learn BenchmarksIntel® Distribution for Python* 2017 Update 1 vs. system Python & NumPy/Scikit-Learn
System info: 32x Intel® Xeon® CPU E5-2698 v3 @ 2.30GHz, disabled HT, 64GB RAM; Intel® Distribution for Python* 2017 Gold; Intel® MKL 2017.0.0; Ubuntu 14.04.4 LTS; Numpy 1.11.1; scikit-learn 0.17.1.
Software and workloads used in performance tests may have been optimized for performance only on Intel microprocessors. Performance tests, such as SYSmark and MobileMark, are measured using specific computer systems, components, software, operations and functions. Any change to any of those factors may cause the results to vary. You should consult other information and performance tests to assist you in fully evaluating your contemplated purchases, including the performance of that product when combined with other products. * Other brands and names are the property of their respective owners. Benchmark Source: Intel Corporation
Optimization Notice: Intel’s compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. Notice revision #20110804 .
Effect of Intel MKL optimizations for
NumPy* and SciPy*
1 1.11
54.13
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System Sklearn Intel SKlearn Intel PyDAAL
Spee
du
p
Potential Speedup of Scikit-learn* due to PyDAAL
PCA, 1M Samples, 200 Features
Effect of DAAL optimizations for Scikit-Learn*
Intel® Distribution for Python* ships Intel® Data Analytics Acceleration Library with Python interfaces, a.k.a. pyDAAL
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Ideas Behind Intel® DAAL: Heterogeneous Analytics
• Data is different, data analytics pipeline is the same
• Data transfer between devices is costly, protocols are different– Need data analysis proximity to Data Source
– Need data analysis proximity to Client
– Data Source device ≠ Client device
– Requires abstraction from communication protocols
Pre-processing Transformation Analysis Modeling Decision Making
Decompression,Filtering, Normalization
Aggregation,Dimension Reduction
Summary StatisticsClustering, etc.
Machine Learning (Training)Parameter Estimation
Simulation
ForecastingDecision Trees, etc.
Scie
nti
fic/
Engi
nee
rin
g
Web
/So
cial
Bu
sin
ess
Compute (Server, Desktop, … ) Client EdgeData Source Edge
Validation
Hypothesis testingModel errors
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Ideas Behind Intel® DAAL: Effective Data Management, Streaming and Distributed Processing
…
Observations, n
Time
Mem
ory
C
apac
ity
Categorical
Blank/Missing
Numeric
Featu
res, p
Big Data Attributes Computational Solution
Distributed across different devices •Distributed processing with communication-avoiding algorithms
Huge data size not fitting into device memory
•Distributed processing•Streaming algorithms
Data coming in time •Data buffering & asynchronous computing•Streaming algorithms
Non-homogeneous data •CategoricalNumeric (counters, histograms, etc)•Homogeneous numeric data kernels• Conversions, Indexing, Repacking
Sparse/Missing/Noisy data •Sparse data algorithms•Recovery methods (bootstrapping, outlier correction)
Outlier
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Ideas Behind Intel® DAAL: Storage & Compute
• Optimizing storage ≠ optimizing compute– Storage: efficient non-homogeneous data encoding for smaller footprint and faster retrieval
– Compute: efficient memory layout, homogeneous data, contiguous access
– Easier manageable for traditional HPC, much more challenging for Big Data
…
Samples, n
Variable
s,
p
Storage ComputeMemory
Filtering, conversions,
basic statistics
Data homogenization and blocking
DAAL DataSource DAAL NumericTable DAAL Algorithm
SIMD
ymm1
ymm3
ymm2
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Ideas Behind Intel® DAAL: Languages & Platforms
DAAL has multiple programming language bindings
• C++ – ultimate performance for real-time analytics with DAAL
• Java*/Scala* – easy integration with Big Data platforms (Hadoop*, Spark*, etc)
• Python* – advanced analytics for data scientist
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50%
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pyDAAL (Offline) pyDAAL (Offline+BasicStatistics)
pyDAAL (Online)
10% faster if basic statistics pre-computed while reading
dataset 25%
incremental cost for
streaming computing
support
Ex 1. Compute Basic Statistics While Reading Dataset Ex 2. Offline vs. Online
• 𝑐𝑜𝑣 𝑋, 𝑌 = 𝐸((𝑋 − 𝐸 𝑋 )(𝑌 − 𝐸 𝑌 )
• Algorithm: Maximum Likelihood Estimator
• Dataset: CSV file n=1M, p=100
…
Samples, n
Variable
s,
p
Storage ComputeMemory
Basic statistics Data blockingSIMD
ymm1
ymm3
ymm2
System Info: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz, 504GB, 2x24 cores, HT=on, OS RH7.2 x86_64, Intel Distribution for Python 2017 Update 1 (Python 3.5)
Software and workloads used in performance tests may have been optimized for performance only on Intel microprocessors. Performance tests, such as SYSmark and MobileMark, are measured using specific computer systems, components, software, operations and functions. Any change to any of those factors may cause the results to vary. You should consult other information and performance tests to assist you in fully evaluating your contemplated purchases, including the performance of that product when combined with other products. * Other brands and names are the property of their respective owners. Benchmark Source: Intel Corporation
Optimization Notice: Intel’s compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. Notice revision #20110804 .
Better memory management in pyDAAL allows bigger datasets even for offline processing• Ex.: Scikit-learn fails to process n=50M, p=1000 while
pyDAAL successfully completes work
Online processing removes dataset size limitation
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Ex 3: Read vs. Compute• Algorithm: SVM Classification with RBF kernel
• Training dataset: CSV file (PCA-preprocessed MNIST, 40 principal components) n=42000, p=40
• Testing dataset: CSV file (PCA-preprocessed MNIST, 40 principal components) n=28000, p=40
System Info: Intel(R) Xeon(R) CPU E5-2680 v3 @ 2.50GHz, 504GB, 2x24 cores, HT=on, OS RH7.2 x86_64, Intel Distribution for Python 2017 Update 1 (Python 3.5)
Software and workloads used in performance tests may have been optimized for performance only on Intel microprocessors. Performance tests, such as SYSmark and MobileMark, are measured using specific computer systems, components, software, operations and functions. Any change to any of those factors may cause the results to vary. You should consult other information and performance tests to assist you in fully evaluating your contemplated purchases, including the performance of that product when combined with other products. * Other brands and names are the property of their respective owners. Benchmark Source: Intel Corporation
Optimization Notice: Intel’s compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. Notice revision #20110804 .
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60% faster CVS file read, 2.2x faster
training66x faster prediction in pyDAAL. Read and compute balanced
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Distributed Parallelism
• Intel® MPI* accelerates Intel® Distribution for Python (mpi4py*, ipyparallel*)
• Intel Distribution for Python also supports– PySpark* - Python* interfaces for Spark*, an
engine for large-scale data processing
– Dask* - flexible parallel computing library for numerical computing 1.7x 2.2x 3.0x 5.3x
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PyDAAL Implicit ALS with Mpi4Py*
Scales with MPI, Spark, Dask and other distributed computing engines
Configuration Info: Hardware (each node): Intel(R) Xeon(R) CPU E5-2697 v4 @ 2.30GHz, 2x18 cores, HT is ON, RAM 128GB; Versions: Oracle Linux Server 6.6, Intel® DAAL 2017 Gold, Intel® MPI 5.1.3; Interconnect: 1 GB Ethernet.
Software and workloads used in performance tests may have been optimized for performance only on Intel microprocessors. Performance tests, such as SYSmark and MobileMark, are measured using specific computer systems, components, software, operations and functions. Any change to any of those factors may cause the results to vary. You should consult other information and performance tests to assist you in fully evaluating your contemplated purchases, including the performance of that product when combined with other products. * Other brands and names are the property of their respective owners. Benchmark Source: Intel Corporation
Optimization Notice: Intel’s compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice. Notice revision #20110804 .
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Summary And Call To Action
• Intel created the Python* distribution for out-of-the-box performance and scalability on Intel® Architecture– With minimum to no code modification Python aims to scale
• Multiple technologies applied to unlock parallelism at all levels– Numerical libraries, libraries for parallelism, Python code compilation/JITing, profiling
– Enhancing mature Python packages and bringing new technologies, e.g. pyDAAL, TBB
• With multiple choices available Python developer needs to be conscious what will scale best– Intel® VTune™ Amplifier helps making conscious decisions
Intel Distribution for Python is free!https://software.intel.com/en-us/intel-distribution-for-python
Commercial support included for Intel® Parallel Studio XE customers!
Easy to install with Anaconda* https://anaconda.org/intel/
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