CScADS Workshop on
Libraries and Algorithms for Petascale Applications
July 30th
August 2nd, 2007
Held at the
Snowbird
Ski & Summer Resort
Highway
210, Little Cottonwood Canyon
Snowbird,
Utah 84092-9000
Organized by Jack Dongarra and Bill Gropp
This workshop is sponsored
by the
Center for Scalable Application Development
Software,
with funding from the
DOE Office of Science through the
Scientific Discovery through Advanced Computing
(SciDAC) program.
We
would like to thank you for agreeing to participate in the CScADS workshop on
Libraries and Algorithms for Petascale Applications. The purpose of this workshop is to identify
challenges for library and algorithm developers from the needs of the SciDAC
applications, and to foster collaboration between the communities.
Specific topics to include the effective use of multicore processors (both algorithms
and libraries) and the use of automatic tuning in libraries, but would not be
restricted to those topics.
The
workshop charge is to:
Identify important open problems and challenges for performance tools
for petascale systems
Brainstorm on promising approaches to open problems
Identify infrastructure needs to address key challenges
Assess available infrastructure
Identify opportunities for synergy
opportunities to
consolidate and harden existing infrastructures
reuse existing components developed by others
refactor and extend existing components to apply them to new challenges
Collaborate on design of sharable components
Identify targets of opportunity for further investment of resources
strategic investment targets for the DOE Office of Science
We
would like to keep things informal.
Dress
at the workshop is informal. Please tell
us if you need special requirements (vegetarian food etc...) We are expecting to
have an internet and wireless connections at the meeting. There will be a
laptop projector for giving talks.
We
hope everyone will participate in the discussions that occur during the
sessions and outside the meeting room. We are looking for more cutting edge,
provocative, honest, and/or controversial talks.
The
workshop and all guest rooms are in the Cliff Lodge. The workshop will take
place in the Summit Room which is on the 10th floor.
The
Banquet and reception on the 1st floor. If the weather's nice, we can have it
outside, otherwise they'll find a room for us inside (last week it was in the
WasatchB room).
Additional
information and be found at http://cscads.rice.edu/workshops/july2007/workshop-logistics
and
http://cscads.rice.edu/workshops/july2007/lib-workshop-07
For reimbursement there will be
forms. Since your hotel is already
covered by the workshop we will probably just need your airfare receipt.
Please
remember that Snowbird is at 8500 ft altitude.
Coming from low altitude, drink plenty of liquids, don't have too much
alcohol your first day or so, and take it easy.
For
those of you around Sunday evening, folks can informally gather in the Aerie
lounge on the 10th floor of the Cliff Lodge to find old friends.
For
those of you not taking the shuttle, the Cliff Lodge is "Entry 4"
into Snowbird.
Agenda:
|
Monday |
June 30th |
Applications |
|
8:00 8:30 |
Continental Breakfast |
Meeting Room: Cliff Lodge |
|
8:30 9:00 |
Welcome and Introduction |
|
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8:30 9:10 |
Steve Jardin, Princeton Plasma Physics Laboratory |
|
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9:10 9:50 |
Rich Lee, SLAC |
Finite-Element Electromagnetic Simulations for
Particle Accelerators at Petascale |
|
9:50 10:20 |
Break |
|
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10:20 11:00 |
Serguei
Ovchinnikov, Tech-X Corporation |
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11:00 11:40 |
Johan Carlsson, Tech-X Corporation |
Concurrent Divide-and-Conquer Library with
Petascale Electromagnetics Applications |
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11:40 12:20 |
Ron Shepard, ANL |
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12:20 2:00 |
Lunch |
On your own (Covered by per diem) |
|
2:00 2:40 |
Ichitaro
Yamazaki, UC Davis |
Algorithmic Challenges in Quantum
Monte-Carlo (QMC) Simulation of Strongly-Correlated Materials |
|
2:40 3:20 |
Kenneth Roche, ORNL |
UNEDF Project: Comments on Some Perceived Software
Issues and Opportunities for Collaboration |
|
3:20 3:40 |
Break |
|
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3:40 4:20 |
Marc Baboulin, U of Tennessee & Cerfacs |
Very Large Least Squares for Parameter
Estimation: Algorithm and Application |
|
4:20 5:00 |
|
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6:00 |
Dinner Banquet |
|
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Tuesday |
July 31st |
Software and Libraries |
|
8:00 8:30 |
Continental Breakfast |
|
|
8:30 9:15 |
Edo Apra, ORNL |
|
|
9:15 10:00 |
Jim Amundson, FNAL |
Computational Challenges in State-Of-The-Art
Accelerator Beam Dynamics. |
|
10:00 10:30 |
Break |
|
|
10:30 11:15 |
Jim Demmel, UC Berkeley |
|
|
11:15 12:00 |
Sherry Li, LBNL |
Development of Sparse Direct Solvers and
Eigensolvers in TOPS |
|
12:00 1:30 |
Lunch |
On your own (Covered by per diem) |
|
1:30 2:15 |
Dan Sorensen, Rice U |
|
|
2:15 3:00 |
Mike Heroux, SNL |
|
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3:00 3:30 |
Break |
|
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3:30 4:15 |
Sanjukta Bhowmick, Columbia U |
|
|
4:15 5:00 |
Karen Devine, SNL |
Dynamic Load Balancing and Partitioning using the
Zoltan Toolkit |
|
6:00 |
Dinner |
On your own (Covered by per diem) |
|
7:30 - |
General Discussion and Optional Hands-on Session |
|
|
Wednesday |
August 1st |
Software and Libraries |
|
8:00 8:30 |
Continental Breakfast |
|
|
8:30 9:10 |
Alfredo Buttari, U of Tennessee |
|
|
9:10 9:50 |
Julien Langou, U of Colorado, Denver |
Latency-Avoiding and Fault-Tolerant
Algorithms for Dense Linear Algebra and Petascale Architectures |
|
9:50 10:30 |
Stan Tomov, U of Tennessee |
Computer Science/Math Challenges Related to
Nano-Technology Applications |
|
10:30 10:45 |
Break |
|
|
10:45 11:25 |
Hong Zhang, ANL |
|
|
11:25 12:05 |
Lori Diachin, LLNL |
Interoperable Meshing Tools for Advanced
Petascale Simulations |
|
12:05 6:00 |
Lunch / Enjoy the Snowbird area (Hiking maps provided) |
On your own (Covered by per diem) |
|
6:00 |
Dinner - Banquet |
|
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Thursday |
August 2nd |
Summary and Priories for DOE: Challenges for Libraries and Algorithms |
|
8:00 8:30 |
Continental Breakfast |
|
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8:30 12:00 |
Split into Groups Respond to charge |
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12:00 1:30 |
Lunch |
On your own (Covered by per diem) |
|
1:30 3:00 |
Group reports |
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List of Attendees:
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Cliff Lodge Registration (Level C) |
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Reception/Banquet
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Marc |
Baboulin |
Libraries |
2 |
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Michael |
Heroux |
Libraries |
2 |
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Julien |
Langou |
Libraries |
2 |
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Rich
(Lie-Quan) |
Lee |
Application |
2 |
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Serguei |
Ovtchinnikov |
Application |
2 |
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Ron |
Shepard |
Application |
2 |
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Hong |
Zhang |
Libraries |
2 |
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Alfredo |
Buttari |
Libraries |
1 |
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Sanjukta |
Bhowmick |
Libraries |
3 |
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Johan |
Carlsson |
Application |
3 |
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Karen |
Devine |
Libraries |
3 |
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Steve |
Jardin |
Application |
3 |
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Sherry |
Li |
Libraries |
3 |
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Stanimire |
Tomov |
Libraries |
3 |
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Ichitaro |
Yamazaki |
Application |
3 |
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James |
Demmel |
Libraries |
1 |
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Julie |
Langou |
Libraries |
1 |
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Jack |
Dongarra |
Libraries |
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Bill |
Gropp |
Libraries |
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Questions
for groups
·
What do users
want from libraries that they dont have now?
o Functionality
§ Operations
§ Types/precision/data layouts
o Ease of use
§ Portability
§ Interoperability
§ Reproducibility
§ Maintainability
o Scalability
§ Target platforms (petascale, multicore, clusters,
)
§ Fraction of peak
§ Memory hierarchies /Out of core
§ Hierarchical machines ->
·
Role of automatic
code generation and tuning?
o When is it worth starting over to write a library
generator rather than a library?
§ Dealing with hierarchical machines
o Maintainability
o Adapting to new architectures
o How much are users willing to accommodate runtime
tuning in their applications?