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== Runtime Systems Vision ==
== Runtime Systems Vision ==
Moderator: Vivek Sarkar  
Moderator: Vivek Sarkar  
Panelists:  
Panelists:  


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This session will focus on getting feedback from selected panelists and the audience on our results. Panelists will first provide us with constructive criticism and suggestions, followed by the interaction with the audience.
This session will focus on getting feedback from selected panelists and the audience on our results. Panelists will first provide us with constructive criticism and suggestions, followed by the interaction with the audience.


[[media:Runtime-Panel.pdf|Runtime Systems Vision]]
[[Runtime_Research_Questions| Questions and Discussion]]
 
[[media:Runtime-Panel.pdf|Runtime Systems Vision Panel Summary]]
 
 
 
== Compilers and Auto-tuning ==


[[Runtime_Research_Questions| Questions and Discussion]]
Moderator:  Mary Hall


== Compilers Research ==
Panelists: 


Moderator:  Dan Quinlan
Panel description.
Panelists (to be confirmed): Milind Kulkarni (Purdue), David Padua (UIUC), P. Sadayappan (Ohio State), Armando Solar-Lezama (MIT), Olivier Tardieu (IBM), Nicolas Vasilache (Reservoir)
Mary: see description for the compilers panel and auto-tuning panel on March 2013.
 
[[Compilers_Research_Questions| Questions and Discussion]]


The panelists in this parallel session will engage the audience in discussing the advances in compiler technology that are available and needed for the X-Stack program to support exascale computing systems.  To save power, exascale systems will present many new features far beyond what we face today in terms of heterogeneity, explicit memory and communications management, load balancing and throttling, imbalance, demand for concurrency, deep (e.g. 10 level) memory hierarchies, new messaging and collectives, fault tolerance and new execution models (e.g., codelets).  Furthermore, at these scales, the algorithms employed by systems will change radically and existing code bases will obselete accordingly.  There will be a greater emphasis on irregularity, locality and placement, asynchronity, relaxed precision, communication avoidance, combinatorics, new solvers, and in-situ analysis and uncertainty quantification.  The panelists will discuss how their teams' research in the X-Stack program bridges between new exascale algorithms and new exascale hardware. 


[[media:CompilerPanel_Summary.pptx|Compiler Panel Summary]]
[[media:CompilerPanel_Summary.pptx|Compiler Panel Summary]]


[[Compilers_Research_Questions| Questions and Discussion]]


== Languages and DSLs ==  
== Languages and DSLs ==  


Moderator: Kathy Yelick
Moderator: Dan/Saman
Speakers (to be confirmed): John Mellor-Crummey, Andrew Lumsdaine, Armando Solar-Lezama, Emina Torlak, John Feo


This session will cover the concepts used in various general purpose and domain specific programming languages (DSLs).  Members of the audience will also be encouraged to participate to provide additional perspective on how specific features of the languages involved in the X-Stack projects and elsewhere are meeting various challenges. (The following questions are written assuming that a speaker is presenting a particular language, but can also be answered more generally for what an Exascale language should have. And “language” is used to refer to both general purpose and domain-specific languages.)
Panelists:


[[media:GPLs-DSLs-Summary-2013.pptx|General Purpose and Domain Specific Languages (GPLs and DSLs)]] 
Panel description. Dan/Saman: see this panel description in March of last year.


[[Languages_Research_Questions| Questions and Discussion]]
[[Languages_Research_Questions| Questions and Discussion]]


== Auto tuning and Learning ==
[[media:GPLs and DSLs -Summary-2013.pptx|GPLs and and DSLs Panel Summary)]] 
 


Moderator: Saman Amarasinghe (MIT)
Panelist: Cy Chan (LBNL), Sam WIlliams (LBNL), Mary Hall (Utah), Una-May O’Reily (MIT)


Because of the extreme complexity of the high performance software and hardware, it is becoming impossible to model and understand the behavior of end-to-end system and manually optimize them for performance. One important solution optimizing complex high performance systems is autotuning. Autotuning uses machine learning techniques to explore the optimization space with empirical evaluation of the performance. In this panel we will discuss:
== Mapping and Optimization Framework ==


[[Autotuning_Research_Questions| Questions and Discussion]]
Moderator: Armando Solar-Lezama
 
Panelist:
 
Panel description. Armando we want to bring here discussions about how a high level representation is mapped and optimized to a particular platform, with as much info about automated mappings/code generation as possible. This should include Mappings, Synthesis, Optimization, and Learning
 
[[Mappling Framework Panel Questions| Questions and Discussion]]
 
 
[[media: Mapping Framework Panel-Summary-2013.pptx|Mapping Framework Panel Summary)]] 


== Resilience ==
== Resilience ==


Moderator:  Andrew A. Chien (University of Chicago/ANL)
Moderator:  Mattan Erez
Panelists: Greg Bronevetsky (LLNL), Bob Lucas (USC/ISI), Sriram Krishnamoorthy (PNNL), Josep Torrellas (Illinois), Saman Amarasinghe (MIT)
 
Panelists:  


The panelists in this parallel session will engage the audience in discussing various resilience technologies – extant and emerging – and their capabilities to address different types of resilience challenges.  Panelists will also discuss how each of these technologies will be demonstrated a promising, how they might be incorporated in future x-stacks (cross program synergy), or presented for direct use by applications program experiments.
Panel description. Mattan, we need here to include different resilience approaches and their connection, if any.  
   
   
[[Resilience_Research_Questions| Questions and Discussion]]
[[Resilience_Research_Questions| Questions and Discussion]]
[[media: Resilience Panel-Summary-2013.pptx|Resilience Panel Summary)]]


== Simulation technology ==
== Simulation technology ==


Moderator:  Shekhar Borkar
Moderator:  Shekhar Borkar
Panelists: Arun Rodrigues, John Shalf, Rishi Khan, Krste Asanovic, Greg Bronevetsky


The panelists in this parallel session will engage the audience in discussing various simulation technologies to evaluate and mature software components of the X-Stack program. This evaluation using simulators will also provide guidance for the hardware design. Behavioral simulators are fast, capable of running software close to real time; on the other hand, functional simulators are slower but model the hardware more accurately. Time accurate simulators are even slower, but provide precise timing information much needed to evaluate certain hardware-software interactions. Emulation technology provides time accuracy as well as speed for software evaluation, but is resource and time intensive. Each of these technologies have their pluses and minus, and the panel will discuss their role in the X-Stack program to evaluate software components with hardware interaction, using metrics such as performance, energy, and implementation.
Panelists:
 
Panel description. Shekhar: I would like to have a discussion about simulation for hardware and software research...


[[Simulator_Research_Questions| Questions and Discussion]]
[[Simulator_Research_Questions| Questions and Discussion]]
[[media: Resilience Panel-Summary-2013.pptx|Resilience Panel Summary)]]
== X-Stack OS/R requirements ==
Moderator:  Marc Snir and Barney Maccabe
Panelists:
Panel description.
[[OS/R requirements_Research_Questions| Questions and Discussion]]
[[media: OS/R Requirements Panel-Summary-2013.pptx|OS/R Requirments Panel Summary)]]

Latest revision as of 21:56, April 29, 2014

Runtime Systems Vision

Moderator: Vivek Sarkar

Panelists:

We have presented the results of the Runtime Summit, which include challenges, solutions, a set of important questions to be answered, and a vision for a runtime architecture, with major components, interfaces, and how to measure success.

This session will focus on getting feedback from selected panelists and the audience on our results. Panelists will first provide us with constructive criticism and suggestions, followed by the interaction with the audience.

Questions and Discussion

Runtime Systems Vision Panel Summary


Compilers and Auto-tuning

Moderator: Mary Hall

Panelists:

Panel description. Mary: see description for the compilers panel and auto-tuning panel on March 2013.

Questions and Discussion


Compiler Panel Summary


Languages and DSLs

Moderator: Dan/Saman

Panelists:

Panel description. Dan/Saman: see this panel description in March of last year.

Questions and Discussion

GPLs and and DSLs Panel Summary)


Mapping and Optimization Framework

Moderator: Armando Solar-Lezama

Panelist:

Panel description. Armando we want to bring here discussions about how a high level representation is mapped and optimized to a particular platform, with as much info about automated mappings/code generation as possible. This should include Mappings, Synthesis, Optimization, and Learning

Questions and Discussion


Mapping Framework Panel Summary)

Resilience

Moderator: Mattan Erez

Panelists:

Panel description. Mattan, we need here to include different resilience approaches and their connection, if any.

Questions and Discussion

Resilience Panel Summary)

Simulation technology

Moderator: Shekhar Borkar

Panelists:

Panel description. Shekhar: I would like to have a discussion about simulation for hardware and software research...

Questions and Discussion Resilience Panel Summary)


X-Stack OS/R requirements

Moderator: Marc Snir and Barney Maccabe Panelists:

Panel description.


Questions and Discussion

OS/R Requirments Panel Summary)

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