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|3||Jan 23||[[#Tuesday (Jan 26)Week 3 - Class I|Assembly Lab (Lab 3) - continued]]||[[#Friday (Jan 29)Week 3 - Class II|Compiled C Lab (Lab 4)]]||[[#Week 3 Deliverables|Blog about the Assembly Lab (Lab 3) and Compiled C Lab (Lab 4)]]
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|4||Jan 30||[[#Tuesday (Feb 2)Week 4 - Class I|Software Optimization]]||[[#Friday (Feb 5)Week 4 - Class II|Algorithm Selection Lab (Lab 5)]]||[[#Week 4 Deliverables|Blog about the Algorithm Selection Lab (Lab 5).]]
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|5||Feb 6|||[[#Tuesday (Feb 9)Week 5 - Class I|Algorithm Selection Lab (Lab 5) Continued]]||[[#Friday (Feb 12)Week 5 - Class II|SIMD and Auto-Vectorization (Lab 6)]]||[[#Week 5 Deliverables|Blog your the Algorithm Selection Lab (Lab 5) and the Auto-Vectorization Lab (Lab 6).]]
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|6||Feb 13||[[#Tuesday Week 6 - Class I|Inline Assembler Lab (Feb 16Lab 7)|Memory architecture]]||[[#Friday (Feb 19)Week 6 - Class II|Inline Assembler Lab (Lab 7)continued...]]||[[#Week 6 Deliverables|Blog about your Inline Assembler Lab (Lab 7).]]
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|7||Feb 20||[[#Tuesday (Feb 23)Week 7 - Class I|Course Presentation AssignmentMemory Architecture]]||[[#Friday (Feb 26)Week 7 - Class II|Project Startup]]||[[#Week 7 Deliverables|Blog about your selected presentation and project topics.]]
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|8||Mar 6||style="background:[[#f0f0ff" colspan="2" align="center"Week 8 - Class I|Linaro Connect Project Discussion]]||[[#Week 8 - No classes. Prepare for your presentation and work on your project.Class II|Presentations]]||[[#Week 8 Deliverables|Prepare for your presentation and work on Blog about your project.]]
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|9||Mar 13||[[#Tuesday (Mar 15)Week 9 - Class I|PresentationsProfiling]]||[[#Friday (Mar 18)Week 9 - Class II|PresentationsBenchmarking]]||[[#Week 9 Deliverables|Blog about your Presentationproject work.]]
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|Labs||align="right"|10%||See deliverables column above. All labs must be submitted by April 21.
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|Project work||align="right"|60%||3 stages: 15% (TBASunday, March 26) / 20% (TBAThursday, April 9) / 25% (TBASaturday, April 22)
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=== Week 2 Deliverables ===
* Blog your conclusion to the [[SPO600 Code Review Lab|Code Review Lab]] (Lab 1)
== Week 3 ==
=== Week 3 - Class I ===
* Continue group work on [[SPO600 Assembler Lab|Lab 3]].
=== Week 3 - Class II ===
* [[SPO600 Compiled C Lab]] (Lab 4)
=== Week 3 Deliverables ===
* Blog your conclusion to:
** [[SPO600 Assembler Lab|Lab 3]]
** [[SPO600 Compiled C Lab|Lab 4]]
== Week 4 ==
=== Week 4 - Class I ===
Software Optimization
* [[Compiler Optimizations]]
* [[Profile Guided Optimization]]
* Algorithm Selection
=== Week 4 - Class II ===
* [[SPO600 Algorithm Selection Lab]] (Lab 5)
=== Week 4 Deliverables ===
* Blog about your Lab 5 results.
== Week 5 ==
=== Week 5 - Class I ===
* Finish the [[SPO600 Algorithm Selection Lab|Algorithm Selection Lab]]
=== Week 5 - Class II ===
* Introduction to Vector Processing/SIMD
* [[SPO600 Vectorization Lab|Vectorization Lab]] (Lab 6)
=== Week 5 Deliverables ===
* Blog your results for the [[SPO600 Algorithm Selection Lab|Algorithm Selection Lab]] (Lab 5)
* Blog your results for the [[SPO600 Vectorization Lab|Vectorization Lab]] (Lab 6)
* For each of the above, be sure to include links to your code, detailed results, and your reflection on the lab.
== Week 6 ==
=== Week 6 - Class I ===
* [[Inline Assembly Language]] -- often used for:
*# Implementing a memory barrier
*# Performing an [[Atomic Operation]]
*#* '''Atomics''' are operations which must be completed in a single step (or appear to be completed in a single step) without potential interruption.
*#* Wikipedia has a good basic overview of the need for atomicity in the article on [http://en.wikipedia.org/wiki/Linearizability Linerarizability]
*# Gaining performance (by accessing processor features not exposed by the high-level language being used (C, C++, ...))
* [[SPO600 Inline Assembler Lab|Inline Assembler Lab]] (Lab 7)
=== Week 6 - Class II ===
* [[SPO600 Inline Assembler Lab|Inline Assembler Lab]] (Lab 7) continued...
=== Week 6 Deliverables ===
* Blog your Lab 7 results.
== Week 7 ==
=== Week 7 - Class I ===
==== Overview/Review of Processor Operation ====
* Fetch-decode-dispatch-execute cycle
* Pipelining
* Branch Prediction
* In-order vs. Out-of-order execution
** Micro-ops
==== Memory Basics ====
* Organization of Memory
** System organization
** Process organization
*** Text, data
*** Stack
*** Heap
* Memory Speeds
* Cache
** Cache lookup
** Cache synchronization and invalidation
** Cache line size
* Prefetch
** Prefetch hinting
==== Memory Architecture ====
* Virtual Memory and Memory Management Units (MMUs)
** General principles of VM and operation of MMUs
** Memory protection
*** Unmapped Regions
*** Write Protection
*** Execute Protection
*** Privilege Levels
** Swapping
** Text sharing
** Data sharing
** Shared memory for Inter-Process Communication
** Copy-on-Write (CoW)
** Demand Loading
** Memory mapped files
==== Memory Barriers ====
'''Memory Barriers''' ensure that memory accesses are sequenced so that multiple threads, processes, cores, or IO devices see a predictable view of memory.
* Leif Lindholm provides an excellent explanation of memory barriers.
** Blog series - I recommend this series, especially the introduction, as a very clear explanation of memory barrier issues.
*** Part 1 - [http://community.arm.com/groups/processors/blog/2011/03/22/memory-access-ordering--an-introduction Memory Access Ordering - An Introduction]
*** Part 2 - [http://community.arm.com/groups/processors/blog/2011/04/11/memory-access-ordering-part-2--barriers-and-the-linux-kernel Memory Access Ordering Part 2 - Barriers and the Linux Kernel]
*** Part 3 - [http://community.arm.com/groups/processors/blog/2011/10/19/memory-access-ordering-part-3--memory-access-ordering-in-the-arm-architecture Memory Access Ordering Part 3 - Memory Access Ordering in the ARM Architecture]
** Presentation at Embedded Linux Conference 2010 (Note: Acquire/Release in C++11 and ARMv8 aarch64 appeared after this presentation):
*** [http://elinux.org/images/f/fa/Software_implications_memory_systems.pdf Slides]
*** [http://free-electrons.com/pub/video/2010/elce/elce2010-lindholm-memory-450p.webm Video]
* [http://www.rdrop.com/users/paulmck/scalability/paper/whymb.2010.07.23a.pdf Memory Barriers - A Hardware View for Software Hackers] - This is a highly-rated paper that explains memory barrier issues - as the title suggests, it is designed to describe the hardware origin of the problem to software developers. Despite the fact that it is an introduction to the topic, it is still very technical.
* [http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.faqs/ka14041.html ARM Technical Support Knowlege Article - In what situations might I need to insert memory barrier instructions?] - Note that there are some additional mechanisms present in ARMv8 aarch64, including Acquire/Release.
* [https://www.kernel.org/doc/Documentation/memory-barriers.txt Kernel Documentation on Memory Barriers] - discusses the memory barrier issue generally, and the solutions used within the Linux kernel. This is part of the kernel documentation.
* Acquire-Release mechanisms
** [http://blogs.msdn.com/b/oldnewthing/archive/2008/10/03/8969397.aspx MSDN Blog Post] with a very clear explanation of Acquire-Release.
** [http://preshing.com/20130922/acquire-and-release-fences/ Preshing on Programming post] with a good explanation.
** [http://infocenter.arm.com/help/index.jsp?topic=/com.arm.doc.genc010197a/index.html ARMv8 Instruction Set Architecture Manual] (ARM InfoCentre registration required) - See the section on Acquire/Release and Load/Store, especially Load/Store Exclusive (e.g., LDREX)
==== The Future of Memory ====
* NUMA (on steroids!)
* Non-volatile, byte-addressed main memory
* Non-local memory
* Memory encryption
=== Week 7 - Class II ===
* [[Winter 2017 SPO600 Project|Course Project]]
=== Week 7 Deliverables ===
* Blog your Lab 7 results, including the second part
* (To be announced: Project Deliverables)
== Week 8 ==
=== Week 8 - Class I ===
* Project Discussions
=== Week 8 - Class II ===
* Project Presentation #0
** Selected glibc function(s)
** Plan of Action
=== Week 8 Deliverables ===
* Blog about your selected function(s) and project plan
** Remember: You should be posting 1-2 times per week
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== Week 3 ==
* [[SPO600 Vectorization Lab|Vectorization Lab]] (Lab 6)
* Blog your results for the [[SPO600 Algorithm Selection Lab|Algorithm Selection Lab]] (Lab 5)
