The document discusses the OpenPOWER Foundation and its collaboration with the HPC Advisory Council. Some key points: - OpenPOWER is pleased to announce its membership in HPCAC to further cross-community collaboration opportunities in HPC. OpenPOWER is contributing several POWER8 systems with NVIDIA GPUs to the HPCAC lab for benchmarking and demonstrations. - OpenPOWER aims to fuel innovation through the collaboration of its partners. It has over 100 members from over 20 countries working on technologies across 24 work groups. - One goal is to accelerate the technology roadmap by defining open interconnect standards and expanding the ecosystem of solutions that leverage the POWER architecture.

1. © 2016 OpenPOWER Foundation
HPC Advisory Council
March 21, 2016
Calista Redmond
President, OpenPOWER Foundation
Director, IBM OpenPOWER Global Alliances
credmond@us.ibm.com
@Calista_Redmond

2. © 2016 OpenPOWER Foundation2
Data is the new basis of competitive value
Retail
Banking
Oil & Gas
Healthcare

3. © 2016 OpenPOWER Foundation3
Data is growing exponentially and demands new system approaches
(technology and strategy)
You are here
44 zettabytes
unstructured data
2010 2020
structured data

4. © 2016 OpenPOWER Foundation4
Oil and Gas
•15 PBs of survey data
•10+ months to process new survey
data once acquired
•100x compute needed for deep water
imaging
•Network and high bandwidth storage
intensive
•Long term storage needs
•Multi-TB data sets for visualization
•1 TB per oilfield per day
•2 TB per rig per day
•80% Dark Data*
Data on the Rise and is the New Basis of Competitive Value
Firms of all sizes are experiencing data challenges as they focus on insight
 The world is awash in data – sensor, modeling, social
 Pools of dark data – collected but un-analyzed
Financial Analysis
• 4 TB/day
• 10k to 100k databases
• Multi PB volume
• 400M tasks per day
• <100ms response required
• Tight coupling of near real time
analytics and trading systems to
underlying data sets.
Genomics
• Next Gen Sequence data doubling
every 5 months
• Some leading institutions @
>100PB in 1-2 years
• Projects increasingly National
scale (UK, China, UAE, US)
• Large cluster and Large SMP
needs
• High performance file system and
scalable storage
• Multi-stage workflow process for
personalized treatment
Personalized
medicine

5. © 2016 OpenPOWER Foundation
Cloud Meets Data Centric
Cognitive Systems
5
Big Data • Cloud • Analytics • Watson
Business
Analytics Business Intelligence
Social AnalyticsFinancial
Analytics
Life Sciences
Climate &
Environment
Technical Computing
Oil and Gas
Science
Massive data requirements drive a composable architecture for big data, complex analytics, modeling and
simulation. The DCS architecture will appeal to segments experiencing an explosion of data and the
associated computational demands
From High Performance Computing to High Performance Insights

6. © 2016 OpenPOWER Foundation6
Accelerated innovation through
collaboration of partners
Amplified capabilities driving
industry performance leadership
Vibrant ecosystem through open
development
Cloud Computing
Hyperscale & Large scale
Datacenters
High Performance
Computing & Analytics
Domestic
IT Agendas
Industry adoption, Open choice
OpenPOWER Strategy
Moore’s law no longer
satisfies performance gain
Numerous IT
consumption models
Growing workload
demands
Mature Open
software ecosystem
Market Shifts
OpenPOWER, a catalyst for Open Innovation
OpenPOWER is an open development community,
using the POWER Architecture to serve the evolving needs of customers.

7. © 2016 OpenPOWER Foundation7
OpenPOWER collaboration with HPC Advisory Council
OpenPOWER is pleased to announce our membership in HPCAC
• Furthering cross-community collaboration opportunities in HPC
Contribution of OpenPOWER systems to HPCAC lab for
benchmarking and demonstration
• 4 systems 2x 10c with 256GB memory with dual NVIDIA K80 GPU acceleration

8. © 2016 OpenPOWER Foundation8

9. © 2016 OpenPOWER Foundation9
OpenPOWER Development Community

10. © 2016 OpenPOWER Foundation10
Fueling the OpenPOWER Community

11. © 2016 OpenPOWER Foundation11
continents
20+ technologies revealed
innovations under way100+
members190+
24 6countries
OpenPOWER Foundation reach

12. © 2016 OpenPOWER Foundation12
So what?
What difference does it make?

13. © 2016 OpenPOWER Foundation13
POWER8: Processor Performance Leadership & Accelerator Interfaces
Memory
Buffer
DRAM
Chips
POWER8
12 Cores, 96 Threads
4 Level Large Caches
Up to 1 TB per socket
Up to 230 GB/s sustained
Faster Cores
8 Threads Per Core
Larger Caches
Direct Accelerator
Interconnect
3x Higher Memory
Bandwidth, 1 TB
Memory per Socket

14. © 2016 OpenPOWER Foundation14
Accelerates Technology roadmap
2015 2016 2017
POWER8 POWER8 with NVLink POWER9
OpenPower
CAPI Interface
Enhanced
CAPI & NVLink
Connect-IB
FDR Infiniband
PCIe Gen3
ConnectX-4
EDR Infiniband
CAPI over PCIe Gen3
ConnectX-5
Next-Gen Infiniband
Enhanced CAPI over PCIe Gen4
Mellanox
Interconnect
IBM CPUs
NVIDIA GPUs Kepler
PCIe Gen3
Volta
Enhanced NVLink
Pascal
NVLink
IBM Systems

15. © 2016 OpenPOWER Foundation15
Application Benchmarks

16. © 2016 OpenPOWER Foundation16
Portfolio of HPC Solutions
• Platform LSF & Symphony workflow and resource management
• Compilers: gcc, IBM XLC, PGI Fortran/C/C++, Java, OpenACC,
OpenMP
• Debuggers, Profilers, Math libraries, MPI & HPC apps
Processors &
Systems
HPC
Software
High Performance
File System &
Storage
• High Performance Processors & Systems
• Accelerator, networking, storage integration via CAPI & NVLink
• Innovative solutions like CAPI Flash
• Highest Performance HPC Storage: Elastic Storage Server
• High Performance Spectrum Scale (GPFS) Parallel File System
• Flash Storage

17. © 2016 OpenPOWER Foundation17
IBM Research Paving the Path to Next-Generation HPC
Programming
Models for Exascale
Enhancing Open
Interconnects
POWER
Data Centric System
Node, & Processor
Innovations
Scalable High
Performance Storage
& File Systems

18. © 2016 OpenPOWER Foundation18
Cross community collaboration is essential

19. © 2016 OpenPOWER Foundation19
OpenPOWER and Open Compute Project
are teaming to deliver price performance advantage on Power
• Contributing OpenPOWER Open Compute
reference design via collaboration between IBM and
Rackspace.
• Contributing OpenPOWER firmware from IBM to
ensure fully open opportunity for OpenPOWER Open
Compute system
• Engaging cross community opportunities via
Open Compute role on advisory group to OpenPOWER
Foundation along with joint activities

20. © 2016 OpenPOWER Foundation20
• Over 2,200 Linux ISVs developing on Power
• 50 IBM Innovation Centers
• Compelling PoCs
• Support for little endian applications
Accelerates
software
innovation
Big Data & Machine
Learning
Cloud Mobile Enterprise
Major Linux Distros
HPC
miniDFT
CTH
BLAST
Bowtie
BWA
FASTA
HMMER
GATK
SOAP3
STAC-A2
SHOC
Graph500
Ilog
CHARMM
GROMACS
NAMD
AMBER
RTM
GAMESS
WRF
HYCOM
HOMME
LES
MiniGhost
AMG2013
OpenFOAM

21. © 2016 OpenPOWER Foundation21
Superior Cloud economics, powering
Hyperscale datacenters
SoftLayer Bare Metal POWER cloud
Rackspace joins OpenPOWER, declares
Open Compute OpenPOWER system
Docker, OpenStack HEAT, and Chef Server for Power
Bluemix Cloud Integration and SQLDB Services
with Power Systems for SOE/SOR integration
Power Cloud environments in Europe
Power Dev Cloud free POWER access to ISVs for Porting
hwww.ibm.com/partnerworld/wps/servlet/ContentHandler/stg_com_sys_power-development-platform
IBM Watson Developer’s Cloud for cognitive computing
www.ibm.com/smarterplanet/us/en/ibmwatson/developers.html
OpenSource
Docker

22. © 2016 OpenPOWER Foundation22
Accelerates Infrastructure Standards
2014 2015 2016
Developer Platform
System SW
HW Architecture
Accelerator
Compliance
SP010 – Tyan OpenPOWER Customer Reference System
CAPI – Coherent Accelerator Processor Interface
AFU – Accelerator Function Unit
FSI – Field Replaceable Unit (FRU) Service Interface
25g IO Compatibility
Memory
OpenPOWER I/O
11 Work Groups
Charter
Compliance Specification
Draft Review WG Spec
Comp
STD
Charter
OpenPOWER ISA Profile V1
IO Device Architecture V2
Coherent Accel Intf Arch
OpenPOWER ISA Profile V2
IO Device Architecture V3
Coherent Accel Intf Arch
Charter
P8 SP010
Data
P8 2U2S
Reference
P8+ 1U1S
Reference
P8+ 2U2S
Reference
OPMB Intf. Spec V1Charter
Charter
CAPI AFU Intf Spec V1
OpenCL SDK
CAPI AFU Intf Spec V2
Charter
CAPI Linux
SDK
64b ABI
Platform Ref
Sys I/O Enablement GuideCharter
Charter 25g IO Spec
OPMB – OpenPOWER Memory Bus
ABI – Application Binary Interface
FSI Specification FSI SpecCharter
SDK – Software Developer Kit
Charter Pers Med
Charter Integrated Solutions
Integrated Solutions
Personalized Medicine

23. © 2016 OpenPOWER Foundation23
Engage in the OpenPOWER community
ACTIONOUTCOMEINTEREST Technology and Software
Innovators
Discuss areas of collaboration
and synergy in OpenPOWER.
Sign up for membership and
join a work group.
Build technical and business
relationships.
Develop
collaborative innovations with
compelling value
Innovators, Integrators,
and Partners
Deep understanding of workload
demands and consumption
preferences of end users.
Team with innovators and end
users to drive requirements,
engage in specific projects.
Deliver
collaborative innovations with
compelling value
End Users
Strategic imperatives and
workload demands for
performance and cost
optimization.
Require open software and
systems with choice and
flexibility.
Engage directly on system
design options.
Deploy
collaborative innovations with
compelling value

24. © 2016 OpenPOWER Foundation24
Thank you.
Calista Redmond
President, OpenPOWER Foundation
Director, IBM OpenPOWER Global Alliances
credmond@us.ibm.com
@Calista_Redmond

25. © 2016 OpenPOWER Foundation25
According to results shared at the STAC Summit on June 4, an IBM
Power8-based system server delivered more than twice the
performance of the best-in-class x86 counterpart when running a set
of standard financial industry benchmarks. - HPC Wire
“Both the current results and future potential are so promising that we are
preparing to build an OpenPOWER-based, Open Compute platform.
And it will run OpenStack services. - Aaron Sullivan, Senior Director &
Distinguished Engineer, Rackspace
We estimate that a physical Power Systems server can support
twice as many virtual environments – and therefore double the
number of client systems – as a physical x86 server. -Ubuntu
“The $320 million deal [U.S. Department of Energy's Sierra and Summit
supercomputers] is a validation of sorts of IBM’s recent strategic shift to open
up its POWER computing architecture for
license and use by other companies
looking for alternatives
to an Intel-controlled world. - Forbes
“
While other vendors are struggling to establish themselves in China,
IBM seems to have found the secret with OpenPOWER. Not only
does this seem to be cementing IBM inside the tough Chinese
technology market but the benefits, such as SuperVessel, are now
starting to be felt
across the whole of IBM.
- Enterprise Times
I still see the POWER8 processor as one of the most
powerful processors in the industry – and with the
accelerators being developed in the OpenPOWER
ecosystem, it is going to be hard for other processors
(including Intel and ARM silicon) to match some of the
acceleration speeds that will be achieved by POWER8
and successive generations. - Clabby Analytics
People Can't Stop Talking About OpenPOWER
“
“
“
“People ask me if we would switch to Power, and the answer is
absolutely,” Urs Hölzle, Google, said emphatically and unequivocally.
“Even for a single generation.”
- The Platform
““
The architectures of the last fifteen or more years are clearly not
going to take us past the next several years, so there needs to be a
step change and there are lots of options but for the workloads we’re
looking at ahead, we are confident about this architecture. - Cliff
Brereton, STFC

26. © 2016 OpenPOWER Foundation26
• Design and TCA cost
optimized for cognitive
workloads on scale out
deployments (cloud
and cluster)
• Solutions for cognitive,
HPC and Big Data
Supported by Canonical
IBM Support
Community / 3rd
Party Support
running
The LC Line
The L Line
PurePower
Enterprise
& IFLs
• Enterprise level RAS
for single system
deployments
• Solutions for Big Data
& Analytics
• Converged
infrastructure offering
• Rapid time to value
and simplicity of
management
• Enterprise level
robustness and IFL
capability
• Solution editions for in
memory databases
• (HANA, DB2 BLU)
• Hosted cloud and
hybrid cloud solutions
• Rapid deployments
and POCs
The IBM Power Systems
Linux Portfolio

27. © 2016 OpenPOWER Foundation
Customize and optimize infrastructure
for most compelling business value
• FPGA acceleration, leveraging open CAPI
processor connect
• GPU acceleration, will leverage NVLINK
processor attach in 2016
• Advanced memory options from Samsung,
Micron, SK Hynix
• Leadership interconnect from Mellanox
Cloud options expand adoption
• IBM Softlayer
• OVH and Online in Europe
• Rackspace Open Compute coming soon
OpenPOWER expands POWER opportunity
27
Developer resources for custom tuning
• SuperVessel cloud system access with
acceleration options in US and China
• Linux software porting and optimization
• OpenPOWER Foundation work groups and
technical resources
Linux on Power dedicated ISV support
• Over 1,900 Linux ISVs developing on Power
• 50 IBM Innovation Centers
• Compelling Proof-of-Concepts
• Support for little endian applications
On-going engagements with nearly every major hyperscale client in the U.S. and China

28. © 2016 OpenPOWER Foundation28
8x faster than x86 Ivy Bridge
on pattern extraction
10x faster text search
than CPU only

29. © 2016 OpenPOWER Foundation29
• In-memory distributed database
using GPUs for processing
• Order of magnitude gains:
• Performance over CPU solutions
• Power reduction
• Cost savings
• Anticipate order of magnitude gains
with POWER based NVLink solutions
in 2016
GPUdb in-memory Accelerated Database
Ultrafast ingest and analysis of billions of objects

30. © 2016 OpenPOWER Foundation30
10x higher throughput, 10x lower
latency accelerating NoSQL workloads
PHP (Zend)
PHP (Zend)
Linux (Ubuntu)
Apache Web Server
(Ubuntu)
MariaDB (MariaDB)
PHP (Zend)
Orchestration-Juju
(Ubuntu)
High Speed Data Transfer (Mellanox)
Turbo LAMP Stack for mobile and web apps
Future
TurboLAMP
Dramatically less data center infrastructure
Dramatically faster responsiveness to customers

31. © 2016 OpenPOWER Foundation31
Storage Enablement for
OpenPOWER
Series 7 & 8 – RAID/HBA Portfolio
PMC Flashtec
NVRAM
Up to 10M IOPS
Samsung SSD
2.5”
700K IOPS
Ecosystem of Industry Solutions
Memblaze SSD
PCIe Card
Up to 8TB
10x Performance over typical SATA
SSD’s
2-3x Port Density with 50% Lower
Power
• Density
Industry’s only 16-24 port
native SAS/SATA adapters
• Flexibility HBA, Caching HBA, or RAID
• Performance Leading Throughput & IOPS

32. © 2016 OpenPOWER Foundation32
• Accelerated appliance with novel data-flow implementation of Memcached
on FPGA.
• Up to 36x improved performance and power response times in
microsecond range.
• CAPI integration of memory allows both host memory and coherent-
attached flash to be used as value store.
Up to 36x performance
improvement
for Key-Value Store acceleration

33. © 2016 OpenPOWER Foundation33
Data Engine for NoSQL with 40TB CAPI-attached flash
Load Balancer
500GB Cache
Node
10Gb Uplink
POWER8 Server
Flash Array w/ up
to 40TB
After: NoSQL POWER8 + CAPI Flash
WWW
10Gb Uplink
WWW
Backup Nodes
500GB Cache
Node500GB Cache
Node500GB Cache
Node500GB Cache
Node
Before: NoSQL in memory (x86)
24U
4U
Less is More
24:1 physical server consolidation =
6x less rack space
24:1
server consolidation
3x
lower cost per user

34. © 2016 OpenPOWER Foundation34
Best-in-class ingredients • IBM POWER8
• IBM Java
• NVIDIA CUDA GPU acceleration
• Ubuntu Little Endian Linux for POWER
8x performance
improvement
GPU acceleration for Java on
segmentation using accelerated machine
learning for clustering with Hadoop / Mahout

35. © 2016 OpenPOWER Foundation35
Critical workloads run on Linux on Power
• Compute intensive
• High memory bandwidth
• Floating point
• High I/O rates
• High quality of service
• Scalability
• Flexible infrastructure
• Large memory footprint
Business Applications
• Highly threaded
• Throughput oriented
• Scale out capable
• High quality of service
Web, Java Apps and Infrastructure
• Handle peak workloads
• Scalability
• High quality of service
• Resiliency and security
HPC applications for
Life Sciences
Database
Analytics & Research

36. © 2016 OpenPOWER Foundation36
Solution stacks continuing to grow
Cloud
Software
Operating
System / KVM
Standard Operating
Environment
(System Mgmt)
Existing
Open
Source
Software
Communities
Firmware
Hardware
New OSS
Community
OpenPOWER
Technology
OpenPOWER
Firmware
• ISV community of 1,900+
• All major Linux distros
• Open sourced POWER8
firmware stack
• Resources for porting
and optimizing:
OpenPOWERFoundation.org

37. © 2016 OpenPOWER Foundation37
Industry trends drive innovation beyond the chip
Processors
Semiconductor Technology
System stack innovations are required to drive Cost/Performance
Applications and Services
Firmware, Operating System
and Hypervisor
System Stack
Systems Management &
Cloud Deployment
Systems Acceleration &
HW/SW Optimization
Workload Acceleration
Services Delivery Model
Advanced Memory Tech
Network & I/O Accel
Use Cases
Microprocessors alone no longer drive sufficient Cost/Performance improvements
Processors
Semiconductor Technology
POWER8 Linux
OpenPOWER
NEW

38. © 2016 OpenPOWER Foundation38
Membership
Level
Annual Fee
$ USD
FTEs Technical Steering Committee Board / Voting position
Platinum $100k 10 One seat per member not otherwise
represented
Includes board position
Includes TSC position
Gold $60k 3 May be on TSC if
Work group lead
Gold members may elect one board
representative per three gold members
Silver
$20k
$5k if <300
employees
0 May be on TSC if
Work group lead
Sliver members may elect one board
representative for all silver members
Associate &
Academic
$0 0 May be on TSC if
Work group lead
May be elected to one community
observer, non-voting Board seat
 The OpenPOWER Foundation is a Not-for-profit entity with a Board of Directors and a Technical
Steering Committee.
• Membership levels provide either a default Board of Director position (Platinum) or an opportunity to be elected
to the Board (Gold, Silver, and Assoc/Academic members). The Bylaws include additional governance detail.
• Technical Steering Committee is formed from Work group Leads and Platinum members.
 Membership options include Platinum, Gold, Silver, and Associate / Academic memberships
• Annual fee and dedicated full-time equivalent (FTEs) - verification of FTEs on honor system
• Contributors, committers, Work group leads and project leads influence Technical Steering Committee
• Associate / Academic level is not available to corporations
Membership agreement, Bylaws, and IP Rights Policy available for review
www.openpowerfoundation.org
Anyone may participate in OpenPOWER. Membership levels are designed for those that are
investing to grow and enhance the OpenPOWER community and its proliferation within the industry.
Membership Options

39. © 2016 OpenPOWER Foundation39
UNICAMP Brazil, SA
http://openpower.ic.unicamp.br/mini
cloud/index.html
Oregon State
North America
http://osuosl.org/services/powerdev
Brno University /
RedHat. Czech Republic
https://fit-rhlab.rhcloud.com
SuperVessel
USA and China
www.ptopenlab.com
IIT Bombay, India
3Q, 2015
HPC Center
University of Texas- TACC
3Q, 2015
OpenPOWER Open Software and
University Cloud Environments
• OpenPOWER Platforms
• Open Stack Software
• University research
• Open Development &
Ecosystem Support

40. © 2016 OpenPOWER Foundation40
Site Ox
Free On-demand cloud-based development platform
using Linux on POWER8 for 2 weeks
www.siteox.com
Lots of resources & support for Linux ISVs and Developers
IBM PartnerWorldTechnical Support
• IBM Innovation Centers
• Free access to Power Hardware
• Free porting assistance
• Free Eclipse-based development environment
www.ibm.com/partnerworld/wps/servlet/ContentHandler/pw_com_pwp_partnerw
orld-program
IBM Innovation Centers
All 50+ centers worldwide now support Linux on Power
One-stop for ISVs, developers
HW access, technical support, demos, toolkits, Hands-on labs
www.ibm.com/systems/power/software/linux/centers
IBM Power Development Cloud
Provide free access to Power hardware to ISVs for Porting
hwww.ibm.com/partnerworld/wps/servlet/ContentHandler/stg_com_sys_power-
development-platform
Regional Ecosystem Initiative – Recruiting Key
Solutions
Greater China, North America, Europe
Middleware and Industry Solutions
IBM DeveloperWorks
Technical resources, community, blogs, toolkits, How to
articles, beta code
www.ibm.com/developerworks/linux/
IBM Watson Developer’s Cloud
Access to IBM Watson for developing cognitive
computing applications
www.ibm.com/smarterplanet/us/en/ibmwatson/developers.html
IBM Migration Factory
Premier migration services for large applications
www.ibm.com/systems/power/migratetoibm/index.html

41. © 2016 OpenPOWER Foundation41
IBM Innovation Centers Provide End-to-End Assistance to ISVs
For more information ibm.com/partnerworld/iic For questions, send an email to iici@us.ibm.com
IBM Innovation Centers
provide training and one-to-
one guidance from building
to marketing your solution.
• Technical skills and hardware access across
multiple platforms, local or remote, at little or
no cost for migration to IBM platforms
• Qualify "Ready for" marks to broaden
marketing reach
• Workshops, seminars, and more conducted by
trained subject matter experts.
All 50+ Innovation and Client Centers worldwide support Linux on Power
Latin America
• Mexico City
• Sao Paulo
North America
• Austin
• Cambridge
• Chicago
• Dallas
• Silicon Valley
• Toronto
Europe and Middle East
• Amsterdam
• Barcelona
• Bratislava
• Bucharest
• Budapest
• Copenhagen
• Dublin
• Ehningen
• Hursley
• Istanbul
• Kiev
• La Gaude
• London
• Ljubljana
• Milan
• Moscow
• Paris
• Prague
• Stockholm
• Tel Aviv
• Warsaw
• Zurich
Africa
• Casablanca
• Johannesburg
• Lagos
• Nairobi
Japan
• Tokyo
Asia Pacific
• Bangalore
• Bangkok
• Ho Chi Minh City
• Kuala Lumpur
• Manila
• Seoul
• Shanghai
• Sydney

42. © 2016 OpenPOWER Foundation
Data Centric: Minimizing Data Movement, Optimizing
Workflows
• Locate Computing where the data resides and relative to the task required
• Within the system
• Within the Data Center / Cloud location, or across locations as optimal
• Shifting from algorithms to workflows
Seismic Data Processing Workflow and Data Lifecycle
Cold
Storag
e
Data
Input

43. Region defined by
LINPACK
Conceptual View of Data
Intensive with Floating Point
Workflow
Data Centric
Applications
Compute Centric
Applications
Floating Point
OPS
Integer
OPS
Low Spatial
Locality
High Spatial
Locality
Conceptual View of Data Intensive-
Integer Workflow
Conceptual View of Data
Fusion/Uncertainty Quantification
Workflow
Different Solutions for Different Types of Workflows

44. 44
DCS Workflows: Mixed Compute Capabilities Required
12/9/13
All Source Analytics
Oil and Gas
Science
Financial Analytics
4-40 Racks
2-20 Racks
1-5+ Racks
1-100’s Racks
Analytics
Reservoir
Graph
Analytics
Throughput
Seismic
Value At Risk
Image
Analysis
Capability
Massively Parallel
Compute Capability:
• Simple kernels,
• Ops dominated (e.g.
DGEMM, Linpack)
• Simple data access
patterns.
• Can be preplanned for
high performance.
Analytics Capability:
• Complex code
• Data Dependent Code
Paths / Computation
• Lots of indirection /
pointer chasing
• Often Memory System
Latency Dependent
• C++ templated codes
• Limited opportunity for
vectorization
• Limited scalability
• Limited threading
opportunity