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04 방응준
1.
Parallel Programming with
Intel® Parallel Studio www.intel.com/go/parallel 방 응 준(ejbang@escomsoft.com) ㈜이에스컴소프트
2.
Trend Multi-Core Processors Change
the Rules Quad Core Dual Core Single Core www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 2 *Other brands and names are the property of their respective owners
3.
Paradigm Shift: More Cores,
Not a Faster Clock • Power and thermal issues limit clock PERFORMANCE frequency • Performance Multi-core Needs increases now Parallel Applications come from parallelism GHz Era Multi-core Era TIME www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 3 *Other brands and names are the property of their respective owners
4.
Non-parallel (serial) is
old and slow. Unnecessary bottlenecks. www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 4 *Other brands and names are the property of their respective owners
5.
Parallelism is the
key to performance. Unnecessary bottlenecks. Parallel programming lets work proceed when ready. www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 5 *Other brands and names are the property of their respective owners
6.
Parallelism is the
key toperformance. Dead end. Not the future. The future is here. We are ready. www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 6 *Other brands and names are the property of their respective owners
7.
Targeting the „Mass
Market“ of Parallelism MAINSTREAM DEVELOPERS www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 7 *Other brands and names are the property of their respective owners
8.
Targeting the „Mass
Market“ of Parallelism MAINSTREAM DEVELOPERS www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 8 *Other brands and names are the property of their respective owners
9.
the Mainstream Developers
www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 9 *Other brands and names are the property of their respective owners
10.
the Mainstream Developers
www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 10 *Other brands and names are the property of their respective owners
11.
Intel® Parallel Studio Microsoft
Visual Studio plug in* for Parallelism + The Perfect Combination for Fast & Reliable Code DESIGN CODE & DEBUG VERIFY TUNE www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 11 *Other brands and names are the property of their respective owners
12.
New software tools
drive adoption of multi-core For Microsoft Visual Studio* C++ architects, developers, and software innovators creating parallel Windows* applications. • Advisor • Composer • Inspector • Amplifier www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 12 *Other brands and names are the property of their respective owners
13.
Parallel Programming development
lifecycle DESIGN Gain insight on where parallelism will most benefit existing source code CODE & DEBUG Develop effective applications with a C/C++ compiler and comprehensive threaded libraries VERIFY Ensure application reliability with proactive parallel memory and threading error checking TUNE Enhance applications with easy-to-use performance analyzer and tuner www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 13 *Other brands and names are the property of their respective owners
14.
Intel® Parallel Advisor
(Available in Q3/2010 ) Gain insight on where parallelism will most benefit existing source code DESIGN PHASE • First and only threading advisor • See where parallelism will most benefit Windows* apps • Step-by-step threading guidance • Make better design decisions • Shorter learning curve for parallelism www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 14 *Other brands and names are the property of their respective owners
15.
Intel® Parallel Advisor
Workflow www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 15 *Other brands and names are the property of their respective owners
16.
Mark Insert Annotate
ANNOTATE_SITE_BEGIN(site1); for (i=0; i<N; i++) { ANNOTATE_TASK_BEGIN(task1); func1(i); ANNOTATE_LOCK_ACQUIRE(0); glob_variable++; ANNOTATE_LOCK_RELEASE(0); func2(i); ANNOTATE_TASK_END(task1); } ANNOTATE_SITE_END(site1); www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 16 *Other brands and names are the property of their respective owners
17.
Views of Intel®
Parallel Advisor www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 17 *Other brands and names are the property of their respective owners
18.
Intel® Parallel Composer Develop
effective applications with a C/C++ compiler and comprehensive threaded libraries CODE & DEBUG PHASE • Easier, faster parallelism for Windows* apps • C/C++ compiler and advanced threaded libraries • Built-in parallel debugger • Supports OpenMP* • Save time and increase productivity • Code Coverage www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 18 *Other brands and names are the property of their respective owners
19.
Intel® Threading Building
Blocks - today • Extends C++ for parallelism – Solves C++ challenges in multiple areas – Portable to any C++ compiler, processor, O.S., already ported to a wide variety! – Coordinated with Visual Studio® 2010’s PPL and Concurrency Runtime • Open source project started by Intel - http://threadingbuildingblocks.org • Most used abstraction for parallelism • Flattered www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 19 *Other brands and names are the property of their respective owners
20.
Generic Parallel Algorithms
parallel_for(range) Concurrent Containers concurrent_hash_map parallel_reduce concurrent_queue All these make up TBB parallel_for_each(begin, end) concurrent_bounded_queue parallel_do concurrent_vector parallel_invoke pipeline parallel_sort Thread Local Storage parallel_scan enumerable_thread_specific combinable Task scheduler task_group Synchronization Primitives task_structured_group atomic; task_scheduler_init mutex; recursive_mutex; task_scheduler_observer spin_mutex; spin_rw_mutex; queuing_mutex; queuing_rw_mutex; Miscellaneous Threads null_mutex; null_rw_mutex tick_count tbb_thread Memory Allocation tbb_allocator; cache_aligned_allocator; scalable_allocator; zero_allocator www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 20 *Other brands and names are the property of their respective owners
21.
Classical parallel algorithm
usage example #include "tbb/blocked_range.h" #include "tbb/parallel_for.h“ ChangeArrayclass defines using namespace tbb; a for-loop body for parallel_for class ChangeArray{ int* array; blocked_range– TBB template public: ChangeArray (int* a): array(a) {} representing 1D iteration space void operator()( const blocked_range<int>& r ) const{ for (inti=r.begin();i!=r.end();i++ ){ Foo (array[i]); } As usual with C++ function } objects the main work }; is done inside operator() void ChangeArrayParallel (int* a, int n ) { parallel_for (blocked_range<int>(0, n), ChangeArray(a), auto_partitioner()); } int main (){ task_scheduler_init init; A call to a template function int A[N]; parallel_for<Range, Body>: // initialize array here… with arguments ChangeArrayParallel(A, N); Range blocked_range return 0; Body ChangeArray } www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 21 *Other brands and names are the property of their respective owners
22.
C++0x lambda functions
support parallel_for example will transform into: Capture variables by value #include "tbb/blocked_range.h" from surrounding scope to #include "tbb/parallel_for.h“ completely mimic the non-lambda using namespace tbb; implementation. Note that [&] could be used to capture void ChangeArrayParallel (int* a, int n ) variables by reference. { parallel_for (0, n, 1, [=](inti) { parallel_for has an overload that takes Foo (a[i]); start, stop and step argument and } constructs blocked_range internally /*, auto_partitioner*/); } Using lambda functions implement int main (){ MyBody::operator() right inside //task_scheduler_init init; int A[N]; the call to parallel_for(). // initialize array here… ChangeArrayParallel (A, N); auto_partitioner is used by default return 0; } explicit task_scheduler_init creation is now optional www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 22 *Other brands and names are the property of their respective owners
23.
Intel® Threading Building
Blocks (TBB) and Microsoft* Visual Studio* 2010 Parallel Pattern Library Identical semantics shared for a core set of concurrent containers and algorithm classes parallel_for(first,last,step,f) parallel_for_each parallel_invoke task_handle task_group_status task_group structured_task_group is_current_task_group_cancelling missing_wait concurrent_vector* concurrent_queue* *These are based on Intel’s implementation used by Threading Building Blocks www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 23 *Other brands and names are the property of their respective owners
24.
Built-in Parallel Debugger
Extension www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 24 *Other brands and names are the property of their respective owners
25.
Intel® Parallel Inspector Ensure
application reliability with proactive parallel memory and threading error checking VERIFY PHASE • Find threading errors faster • Parallel memory and threading error checking • Rapid analysis of code • Help ensure Windows* application reliability • Ship apps that run error-free www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 25 *Other brands and names are the property of their respective owners
26.
Memory Errors Analysis •
Memory Leaks • Invalid Memory Accesses • Invalid Partial Memory Accesses • Mismatched Memory Allocation / Deallocation • Missing Allocations • Uninitialized Memory Accesses • Uninitialized Partial Memory Access www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 26 *Other brands and names are the property of their respective owners
27.
Intel® Parallel Inspector-Memory
Errors www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 27 *Other brands and names are the property of their respective owners
28.
Intel® Parallel Inspector-Memory
Errors www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 28 *Other brands and names are the property of their respective owners
29.
Threading Error Analysis •
Potential Threading Errors Detected • Data Races • Deadlock • Potential Privacy Infringement www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 29 *Other brands and names are the property of their respective owners
30.
Intel® Parallel Inspector-Threading
Errors Data Racing www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 30 *Other brands and names are the property of their respective owners
31.
Race Conditions • Threads
“race” against each other for resources • Execution order is assumed but cannot be guaranteed • Storage conflict is most common • Concurrent access of same memory location by multiple threads – At least one thread is writing www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 31 *Other brands and names are the property of their respective owners
32.
Intel® Parallel Amplifier Quickly
find bottlenecks and tune parallel applications for scalable multi-core performance TUNE PHASE • Quickly find bottlenecks • Tune Windows* apps faster • Optimize app performance • Scale apps for multi-core • Designed for parallel apps • Performance Analysis • Performance Scalability Analysis • Locks & Waits Analysis www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 32 *Other brands and names are the property of their respective owners
33.
Where to parallel…
www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 33 *Other brands and names are the property of their respective owners
34.
Thank you! Time for
Questions now. Naver Cafe: cafe.naver.com/intelsw Twitter: IntelSDP www.intel.com/go/parallel Copyright © 2009, Intel Corporation. All rights reserved. 34 *Other brands and names are the property of their respective owners
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