Introducing the Transmeta Efficeon TM8000

Transcription

Introducing the Transmeta
Efficeon TM8000 Microprocessor
Family
Matthew R. Perry, Ph.D.
President and Chief Executive Officer
David R. Ditzel
Co-Founder, Vice-Chairman and CTO
October 14 ,2003
Transmeta Corporation
Page 1
October 14, 2003
How Crusoe Changed the Industry
"Until Transmeta released the Crusoe processor
in 2000, the mobile computer market was
stagnating with repurposed desktop technology,
oversized and overweight hardware, and
disappointing growth. Crusoe showed the
computer industry what was possible…”
Rob Enderle, emerging technology expert for the Enderle Group
Page 2
October 14, 2003
Notebook Computer Market Evolution
12
10
10 lbs.
9.8 lbs.
Compaq
LTE-286
Toshiba
T4500C
Number of Pounds
8
9.0 lbs.
Panasonic
CF-41
7.0 lbs.
Compaq
Presario
6
5.5 lbs.
Fujitsu
Lifebook
4
2
3.3 lbs.
Fujitsu
Loox-T 2.4 lbs.
Toshiba
Libretto 1.8 lbs.
Sony
0.9 lbs.
Vaio U
OQO
0
1990
1992
1994
1996
1998
2000
2001
2002 2003
Year of Introduction
Page 3
October 14, 2003
Crusoe Was Adopted by Mobile PC Leaders
Crusoe was used by 6 of top 10
worldwide leaders!
Page 4
October 14, 2003
Efficient Computing
Transmeta Is A Leading Provider of
Efficient Computing Processors
Page 5
October 14, 2003
Based on Transmeta’s Unique Approach
Page 6
October 14, 2003
Page 7
October 14, 2003
Page 8
October 14, 2003
Performance Efficient
More Work Per GHz plus More GHz
Page 9
October 14, 2003
Wider Market for Efficeon
Thin
Client
UPC
Thin & Mainstream Blades &
Quiet DT
Light
Laptop
Low End /
Value
High End /
Performance
Embedded
Performance
Page 10
October 14, 2003
Efficient Computing Overview
Performance Efficient
• Higher performance per cycle, and higher GHz
• Performance comparable or superior to leading competitors
Power Efficient
• Extremely low standby power
• Low power integrated northbridge
Space Efficient
• Two compact packaging options for the microprocessor
• Highly integrated chipsets are also space efficient
Cost Efficient
• Efficeon will lead in x86 “Performance per Watt per Dollar”
• Simpler thermal solution and smaller board save cost
Freedom of Choice
• Enables choice of best-in-class solutions from industry leaders
• Chipset, Graphics, Wireless solutions available today
Page 11
October 14, 2003
Industry Endorsements
and Thank-You’s
Page 12
October 14, 2003
Efficeon Endorsement Partners
Page 13
October 14, 2003
Efficeon OEM Endorsers
DTR
MoBits
Page 14
Xybernaut
October 14, 2003
Special Thank-You: Sharp
• Sharp has provided Efficeon-based prototype systems for our
technology demonstrations at the launch.
• These demos can be viewed in the demonstration area.
• Historical Reference: Sharp’s existing Actius MM10 notebook,
based on the Crusoe processor, is the thinnest and lightest fullfeatured notebook computer available for sale in the U.S.
• Sharp’s MM10 is Ranked #8 on PC World’s Top 15
Notebook PCs ranking for the month of September.
Sharp’s Actius MM10 is based on the
Crusoe Architecture
Page 15
October 14, 2003
Special Thank-You: Fujitsu
•
Fujitsu has provided Efficeon-based prototype systems for our
technology demonstrations at the launch.
• These demos can be viewed in our demonstration room
•
Historical Reference: Fujitsu’s LifeBook P Series, which used the
Crusoe processor, when introduced, was the world’s smallest full
featured notebook
Fujitsu’s LIfebook P Series was based on
the Crusoe Architecture
Page 16
October 14, 2003
Special Thank-You: TSMC
• TSMC is manufacturing the Efficeon family in the same
well-proven 130nm process as is currently used to
deliver the 1GHz Crusoe
• Has provided outstanding support during the development of the
Efficeon processor family
• Provided fast turnarounds for engineering wafers
• Delivered excellent yields
• Proved to be very responsive to Transmeta’s needs
• All while meeting their commitments on the 1GHz Crusoe products
Page 17
October 14, 2003
Special Thank-You: Fujitsu Semiconductor
• On October 7th it was announced that Fujitsu
Semiconductor had been selected as the 1st foundry
for the planned 90nm generation of Efficeon products
• ‘Mainframe class’ process expected to deliver high clock
frequencies based on advanced 90nm transistors with leadership
40nm physical gate lengths
• Close collaboration with Transmeta engineers
• Dedicated engineering resources
• Excellent communications and program management
• Production Goal: Second Half 2004
Page 18
October 14, 2003
The New Era Has Begun!
Page 19
October 14, 2003
Introducing the Transmeta
Efficeon TM8000 Microprocessor
David R. Ditzel
Co-Founder, Vice-Chairman and CTO
October 14 ,2003
Efficeon Launch Event
Page 20
October 14, 2003
Agenda
• Introducing Efficeon
• Efficeon Technical Overview
• High Performance IO Interfaces
• New Code Morphing Software
• Microarchitecture Description
• Evaluation
• Performance
• Power
• Board Area
• Processor Roadmap
• Summary
• LongRun2 Technology Preview
Page 21
October 14, 2003
Transmeta is pleased to announce:
A new eon for efficient PC computing:
TM
Efficeon and Crusoe are trademarks of Transmeta Corporation. Pentium-4, Pentium-M and Centrino are trademarks of Intel Corporation.
Page 22
October 14, 2003
Efficeon is…
Transmeta’s Next Generation Processor
A high-performance, low-power x86 microprocessor
• New 256-bit VLIW microarchitecture issues up to 8 instructions/cycle
• New Code Morphing Software
• Fully x86 compatible (Pentium-4 ISA)
• Supports MMX / SSE / SSE-II SIMD instructions for multimedia
Features an enhanced integrated northbridge
• Integrated DDR Memory interface
• Integrated AGP Graphics interface
• Integrated HyperTransport interface
Efficient Design
• Performance Efficient: Better performance / MHz than Pentium-4
• Energy Efficient: New low power features
• Space Efficient: Small real-estate solutions
• Cost Efficient: Simple design enables low cost manufacturing
Page 23
October 14, 2003
Crusoe and Efficeon
Performance
TM8000 family
1 GHz
-40 oC temp
for embedded
TM5000 family
$20
$100
Page 24
Price
Range
October 14, 2003
Efficeon: High Performance Interfaces
DDR-400 Memory
AGP- 4X Graphics
• High Performance 64-bit DDR
• Up to 200MHz/400 Megatransfers/sec
• Supports up to 4GB of memory
• Optional ECC Support
Supports 1X, 2X or 4X rates
AGP 2.0 compliant
Full GART support
Graphics
AGP
DDR
LPC
LPC
Low Pin Count Bus (Rev 1.0)
Used for BIOS/CMS FLASH
FLASH
802.11
PCI
HT
HT
Southbridge
HyperTransport IO
• Point to Point LVDS Interface
• 8-bit path each direction
• 200 or 400 MHz Speeds
• 1.6 Gigabytes/s aggregate
• 12 times the bandwidth of PCI
Support for High Performance Graphics, Memory, and Communications
Page 25
October 14, 2003
Transmeta Technology
Low
Power
Efficeon is the sum of
x86 Code Morphing Software
+
Code Morphing Software

=
x86 PC
Compatibility
VLIW Hardware
Provides Compatibility

Very Long Instruction Word
processor
Translates the 1’s and 0’s of x86
instructions to equivalent 1’s and
0’s for a simple VLIW processor

Simple and fast

Fewer transistors
High
Performance
Learns and improves with time
Page 26
October 14, 2003
Efficeon: A New Micro-Architecture
An
An 8
8 Instruction/Clock
Instruction/Clock CPU
CPU for
for Mainstream
Mainstream PC
PC Use
Use
4 instr/clock to 8 instr/clock
Crusoe TM5800
More than twice the
Instruction Level Parallelism
Efficeon TM8000
Higher Performance
More MHz x more ILP
CPU with
Integrated
Northbridge
Can run same workload
at lower MHz and Voltage
128-Bit VLIW
32 Bit
32 Bit
32 Bit
256-Bit VLIW
32 Bit
32 Bit
Four 32-bit instructions
issued per clock
CPU with
Integrated
Northbridge
Energy Efficiency
32 Bit
32 Bit
32 Bit
32 Bit
32 Bit
32 Bit
Eight 32-bit instructions
issued per clock
Page 27
October 14, 2003
32 Bit
High Instruction Level Parallelism
Each clock, Efficeon can issue from
one to eight 32-bit instruction “atoms”. . .
atom1
Load or
Store or
32-bit add
atom2
atom3
Load or
Store or
32-bit add
FP / MMX
SSE / SSE2
atom4
Integer
ALU-1
MMX
SSE /SSE2
atom5
Integer
ALU-2
Branch
atom6
Alias
Exec-1
atom7
atom8
Control
Exec-2
. . . to any of the above eleven logical execution units.
Page 28
October 14, 2003
New Code Morphing Software
44 Gear
Gear System
System Significantly
Significantly Improves
Improves Responsiveness
Responsiveness and
and Overall
Overall Performance
Performance
1st Gear
Executes 1 instruction at a time
• Profiles code at runtime
• Gathers data for flow analysis
• Gathers branch frequencies and directions
• Detects load/store typing (IO vs memory)
Filters out infrequently executed code
No startup cost
Lowest speed
Page 29
October 14, 2003
44 Gear
Gear System
Responsiveness and
and Overall
Overall Performance
Performance
1st Gear
2nd Gear
Uses profile data to create initial translations
after code reaches 1st threshold.
• Translates a “Region” of up to100 x86 instructions.
• Adds flow graph “Shape” information
• Light Optimization
• “Greedy” scheduling
Low translation overhead
Fast execution
Page 30
October 14, 2003
44 Gear
Gear System
Responsiveness and
and Overall
Overall Performance
Performance
1st Gear
2nd Gear
3rd Gear
Further optimizes the 2nd gear regions
• Common sub-expression elimination
• Memory re-ordering
• Significant code optimization
• Critical path scheduling
Medium translation overhead
Faster execution
Page 31
October 14, 2003
44 Gear
Gear System
Responsiveness and
and Overall
Overall Performance
Performance
1st Gear
2nd Gear
3rd Gear
4th Gear
Most advanced optimizations
for “hottest” code regions.
• Splices together multiple regions
• Optimizes across region boundaries
• Used advanced behavioral data
• Critical path scheduling
Highest translation overhead
Fastest execution
Page 32
October 14, 2003
Advanced Code Optimization Capabilities
Some of Efficeon’s Advanced Code Morphing Software optimizations:
•
•
•
•
•
•
•
•
•
•
•
Aggressive scheduling of instruction level parallelism for 8-wide VLIW
Out-of-Order Execution on In-Order Hardware
Critical path height reduction
Common sub-expression elimination
Uses Transmeta’s proprietary “Address Alias Checking Hardware”
• Re-ordering of loads and stores even with potential aliases
• Elimination of loads and stores even with potential aliases
Software register renaming to avoid false dependencies
Fusing operations
Dead code elimination
Removal of conditional branches
Adaptive re-translation during program execution
Loop unrolling and optimization
• Remove Exit Branches
• Loop invariant code motion
• Code motion across back-edge • Strength reduction
Important “hot” codes get the most optimization
Page 33
October 14, 2003
Internal Registers and Cache
Registers with support for speculative “Undo/Commit”
• 64 32-bit integer registers
• 48 shadowed
• 64 80-bit floating point registers
• Full MMX and SSE-I and SSE-II support
• 48 shadowed
• 4 Predicate Registers (all shadowed)
Caches:
• 1 MB Level 2 cache with ECC
• 4-way set associative, 128-byte lines
• 128 KB Level 1 Instruction Cache
• 64 KByte Level 1 Data Cache
Memory Enhancements with support for speculative “Undo/Commit”
• 14 entry Write Queue / Store Buffer
• 32 entry Victim Cache with 32-byte lines
• 4 32-byte Write combiners
• Support for speculative stores in data cache
Page 34
October 14, 2003
VLIW Pipeline Instruction Flow
L2 Cache
1 MB
I Cache
128 KB
Decoupled
Front End
Instruction
Fetch Unit
Queues
up to
48 atoms
6 Stage Integer Pipe
8 Stage Floating Point Pipe
6 Stage Load/Store Pipe
D Cache
64 KB
Page 35
October 14, 2003
Pipeline Diagrams
6-Stage Integer Pipe
IS
DR
RM
EM
CM
WB
IS: Instruction Issue
DR: Instruction Decode
RM: Register Read for ALU operands
EM: Execute ALU operation
CM: ALU Condition flag completion
WB: Write Back results to integer register file
8-Stage Floating Point Pipe
IS
DR
DT
XA
XB
XC
XD
WB
IS: Instruction Issue
DR: Decode-1
DT: Decode-2
XA: Floating Point compute stage-1
XB: Floating Point compute stage-2
XC: Floating Point compute stage-3
XD: Floating Point compute stage-4
WB: Write Back to floating point register file
Page 36
October 14, 2003
Efficeon Processor Layout
LR2
Efficeon die size includes
Northbridge and AGP Port:
130 nm technology:
119 mm2 die size
Instruction
Front End
Integer Unit
90 nm technology:
68 mm2 die size
Bus
Unit
Page 37
October 14, 2003
Performance
Page 38
October 14, 2003
Integer Performance per Clock
2.5
2.3x
2.0
Efficeon outperforms
1.4x
1.5
1.3x
SHA1
RSA
Bytes per cycle
for a 1024-byte buffer
1024-bit Signatures
per million cycles
Page 39
Efficeon
Centrino
P4
Efficeon
Centrino
P4
0.0
Efficeon
0.5
Centrino
1.0
P4
Performance per clock
relative to Pentium - 4
SHA1, RSA and AES are the basis for modern encryption suites, and are
a good real-world benchmark of computationally intensive integer codes.
AES
Bytes per cycle, 1024-byte
Buffer (AES-128-CBC)
October 14, 2003
Comparing Mobile Performance
TDP = maximum Thermal Design Power
• For many form factors, TDP often limits the maximum MHz
• 7 Watts TDP tends to be about the upper limit for fanless notebook systems
What MHz can you achieve within a 7 Watt TDP?
• Different processors achieve different MHz for the same TDP limit
• To compare performance, you must compare at the maximum MHz for a
given TDP limit
For example, maximum MHz for the common 7W TDP envelope:
Intel
Centrino
Transmeta
Efficeon
7 Watt TDP
7 Watt TDP
900 MHz
1100 MHz
Page 40
October 14, 2003
Integer Performance (at 7 Watt TDP MHz)
SHA1, RSA and AES are the basis for modern encryption suites, and are
a good real-world benchmark of computationally intensive integer codes.
2.7x
2.5
2
1.5
1.2x
Note: Now relative to
Centrino, since there is
no 7 watt Pentium-4.
SHA1
RSA
Intel Centrino
900 MHz (7 Watt TDP)
Page 41
Efficeon
Centrino
Efficeon
Efficeon
0.5
Centrino
1
0
2.2x
Centrino
Performance
(relative to Centrino)
3
AES
Transmeta Efficeon
1100MHz (7 Watt TDP)
October 14, 2003
Floating Point Performance (at 7 Watt TDP MHz)
2000
1000
500
0
MFLOPS
1452
MFLOPS
Intel Centrino
900 MHz (7 Watt TDP)
1910
Efficeon
1500
~1.3x
Centrino
LINPACK 100x100
DP MFLOPS
2500
Page 42
Transmeta Efficeon
1100MHz (7 Watt TDP)
October 14, 2003
PC System Performance (at 7 Watt TDP MHz)
Efficeon comparable with system effects
28.7
27.3
Centrino
Efficeon
2866
0.2
Efficeon
0.4
2985
108
Efficeon
0.6
Centrino
95
99
Efficeon
Centrino
105
Centrino
117
Efficeon
0.8
103
1
Centrino
Relative Performance
1.2
0
CPUmark99
MobileMark 2002
SysMark2002
Centrino 900 MHz ~ 7 W TDP
855GM Northbridge ~ 1-2 W TDP
PCmark2002 CPU Business Winstone
2001
Efficeon 1100 MHz ~7W TDP
(includes integrated Northbridge)
* Similarly configured ultralight systems: DDR-266 DRAM, 1.8” HDD, Windows XP Professional
Page 43
October 14, 2003
Standby Power
Page 44
October 14, 2003
Efficeon consumes ~8x Lower Idle Power
CPU + Northbridge + DRAM
1.6
1.4
Standby power is
key for preserving
battery life.
Windows XP Idle Power
1.2
1
~8x less power
0.8
Closest “apples-to0.6
apples” comparison
0.4
is to compare key
components of
0.2
• CPU Core
• CPU IO
0
• Northbridge Core
• Northbridge IO
• DRAM
Measured in comparable systems
using supply voltages from each
rail to subsystem components.
DRAM and Northbridge share a supply.
1.45 Watts
0.18 Watts
Centrino
Efficeon
Windows XP Idle Power
Centrino System Function
Centrino
Watts
Efficeon System Function
Efficeon
Watts
CPU Core Power
0.275
CPU+Northbridge Core Power
0.055
Front Side Bus Power
0.097
HyperTransport Bus Power
0.073
Northbridge Core Power
0.537
DDR Memory + NB Bus Power
0.542
DDR Memory + NB Bus Power
0.056
Total CPU+NB+Memory
1.451
Total CPU+NB+Memory
0.184
Page 45
October 14, 2003
Compact Board Space Solutions
from Transmeta and nVidia
Page 46
October 14, 2003
Small Package Solutions
Intel
Pentium M
35x35 mm
1225 mm2
Efficeon
Efficeon TM8600
CPU + Northbridge
Standard Package
29x29 mm
841 mm2
Efficeon
Efficeon TM8620
CPU + Northbridge
Small Package
21 x 21mm
441 mm2
Intel MCH
Northbridge
37.5x37.5 mm
1406 mm2
ICH
Southbridge
31x31 mm
961 mm2
Total Area =
3592 mm2
(Figures approximately to scale)
nVidia
nForce3 Go 150
Southbridge
Standard Package
35x35 mm
1225 mm2
Total Area =
2066 mm2
nVidia
nForce3 Go 120
Southbridge
Small Package
22x22mm
484 mm2
Total Area =
925 mm2
Transmeta CPU+NB & nVidia SB
real estate up to 4x smaller
Page 47
October 14, 2003
3D Graphics Performance (3DMark 2001)
3DMark 2001SE Score
Efficeon + Nvidia solution outperforms
while delivering most compact board area
3500
3000
~1.6x
2500
2963
2000
1500
1819
1000
500
0
Transmeta Efficeon 1100MHz
nVidia GeForce4 420 Go
nVidia Southbridge
Intel Centrino 900 MHz
Intel 855GM graphics
* Resolution for both systems was set to 1024 x 768 x 32. Both CPU’s at their 7 Watt TDP MHz limit.
Page 48
October 14, 2003
Efficeon Roadmap
Page 49
October 14, 2003
Long Term Efficeon Roadmap
Clock Speed and TDP Maximum Power
Legend:
GHz / TDP Max
Efficeon
Efficeon Generation-3
90/65 nm
Efficeon
Fujitsu 90 nm
Higher Performance
TSMC 130 nm
Extended Power Range
2.0 GHz / 25 W
New Features
1.8 GHz / 12 W
1.3 GHz / 14 W
1.6 GHz / 7 W
1.2 GHz / 12 W
1.4 GHz / 5 W
1.1 GHz / 7 W
1.0 GHz / 3 W
1.0 GHz / 5 W
Efficeon
Q4 2003
2004
2005
Note: Average power is typically far lower than TDP power.
Page 50
October 14, 2003
Efficeon Family Products
There will be a family of Efficeon TM8000 products:
130 nm CMOS Technology
• TM8600 1MB L2 Cache
• TM8300 512KB L2 Cache
• TM8620 Small Package, 1MB L2
90 nm CMOS Technology
• TM8800 1MB L2 Cache
• TM8500 512KB L2 Cache
• TM8820 Small Package, 1MB L2
Page 51
Standard Package
Lower Cost
Small Size
Standard Package
Lower Cost
Small Size
October 14, 2003
Summary
Efficeon incorporates all the learning from Crusoe experience
• New microarchitecture and Code Morphing Software
• New high performance interfaces: AGP, DDR, and HyperTransport
Efficeon is a major leap forward in CPU performance.
At comparable thermal limits of nearest competitor, Efficeon is:
• ~2x higher performance on Integer intensive codes AES, SHA1
• ~1.3x higher performance on Floating Point with Linpack
• ~1.6x higher performance on 3D graphics (vs Centrino with 855GM)
Transmeta with nVidia offer extremely compact solutions
• ~4x smaller than closest alternative CPU + Northbridge + Southbridge
• Enables smaller systems, more features, or more battery
Efficeon’s leading performance/watt/dollar will allow it to enter
• Mainstream notebooks
• Blade servers
• Quiet fanless designs
• Small mobile systems
Page 52
October 14, 2003
Guest Speaker
Page 53
October 14, 2003
Transmeta is pleased to have a guest speaker,
Dr. Takayasu Sakurai, a world renowned expert
in the field of semiconductor technology.
Transmeta asked him to summarize one of
his recent talks.
His talk will be done by video tape.
Takayasu Sakurai received the Ph.D. degree in EE from the University of Tokyo in 1981.
In 1981 he joined Toshiba Corporation, where he designed CMOS DRAM, SRAM,
RISC processors, Digital Signal processors, and System-on-a-chip solutions.
From 1988-1990, he was a visiting researcher at the University of California Berkeley.
Since 1996, he has been a professor at the University of Tokyo, working on
low-power VLSI, memory design, interconnects, and wireless systems.
He has published more than 250 technical papers including more than 50 invited talks
and papers, several books and holds more than 50 patents.
Page 54
October 14, 2003
The Future of Semiconductors:
Crises in 90-nanometer
technology and beyond
Professor Takayasu Sakurai, Ph.D.
Head of Sakurai Laboratory
Institute of Industrial Science
University of Tokyo
Tokyo, Japan
Page 55
T. Sakurai
October 14, 2003
Crises in 90nm technology
and beyond
Moore’s law drives the industry
for higher performance and lower cost
but…
Page 56
T. Sakurai
October 14, 2003
Power consumption in Watts
Ever increasing power consumption
1,000
x1.4
100
10
1
0.1
x4
/3
ar
e
y
3
/
s
s
r
a
e
y
Processors
MPU
DSP
published
0.01
1980 1985 1990 1995 2000
in ISSCC
Year
Page 57
T. Sakurai
October 14, 2003
Leakage current (A/µm)
Transistors go leaky
10 -6
Gate leakage
10
-9
Subthreshold
leakage
Junction
leakage
Subthreshold
Junction leakage
leakage
Gate leakage
10 -12
1999
Courtesy of Prof. T. Hiramoto
2002
2005
2008
2011
Year
Page 58
T. Sakurai
October 14, 2003
Leakage may ruin Moore’s law
1/100
Power per chip in Watts
10,000
Leakage
1,000
x1.4
100
10
1
x4
/3
ar
e
y
3
/
s
r
a
e
y
Dynamic
s
x1.1 / 3 years
ITRS
requirement
Processors
0.1
published
MPU
DSP
in ISSCC
0.01
1980 1985 1990 1995 2000 2005 2010 2015 Year
Page 59
T. Sakurai
October 14, 2003
VTH Fluctuation is a real headache
Voltage [V]
1
Supply voltage 100
0.8
80
0.6
60
0.4
0.2
Minimum
line width
VTH fluctuation
40
20
0
0
2002 ’04 ’06 ’08 ’10 ’12 ’14 ’16
100
Delay fluctuation
due to VTH
fluctuation
Delay fluctuation [%]
120
Minimum line width [nm]
1.2
50
0
2002 ’04 ’06 ’08 ’10 ’12 ’14 ’16
Year
Year
→ Lower yield & higher leakage
Page 60
T. Sakurai
October 14, 2003
Summary
Moore’s law drives the industry
for higher performance and lower cost
but…
Leakage power explosion and
VTH fluctuation
will be big stumbling blocks
for Moore’s law.
Page 61
T. Sakurai
October 14, 2003
TM
LongRun2
Technology Preview
Efficeon Launch Presentation
Page 62
October 14, 2003
Leakage Challenges “Moore’s Law”
The single biggest challenge to the microprocessor
industry as we scale into 90nm and 65nm technologies
is how to control transistor leakage power.
Leakage is a big problem.
So far, there have been few satisfactory solutions.
Leakage power could be the fundamental limiter
for “Moore’s Law.”
Page 63
October 14, 2003
LongRun2 Technology Preview
Transmeta has developed a solution to the Leakage Problem.
LongRun2
Software Controlled Leakage Management
Page 64
October 14, 2003
January 2000: Transmeta introduced LongRun power management
• Software dynamically adjusts voltage and MHz
• Very effective at reducing active power
• LongRun led the industry for 3 years
October 14, 2003 : Transmeta previews LongRun2
• LongRun2 adds Software Controlled Leakage Management
• LongRun2 dynamically adjusts transistor Vt’s to control Leakage Power
• LongRun2 will allow future versions of Efficeon to:
• Reduce leakage power while running
• Reduce active power while running
• Reduce standby power
• Efficeon already contains the necessary circuitry for LongRun2
• Software, Hardware and CMOS process work together
in this interdisciplinary solution to the Leakage problem.
• LongRun2 is the next leap forward in power management.
Page 65
October 14, 2003
Pre-Demo Transistor Leakage Review
Transistors turn on when the input voltage to the gate is
above a certain value, i.e. the “Threshold Voltage” or Vt.
Usually Vt is about 1/2 to 1/5th of the power supply voltage.
Transistors with lower Vt switch faster, but have more leakage.
• If Vt too low, power is wasted.
Transistors with higher Vt have less leakage, but are slower.
• If Vt too high, MHz is lost.
LongRun2 dynamically adjusts Vt for better efficiency.
Unwanted Vt fluctuations can be largely eliminated.
Page 66
October 14, 2003
Efficeon LongRun2
Demonstration
Page 67
October 14, 2003
LongRun2 Demo
Page 68
October 14, 2003
LongRun2 Technology Preview Summary
Summary of LongRun2 demonstration.
Efficeon’s Code Morphing Software:
• Dynamically adjusted transistor Vt’s while system was running
to reduce excessive leakage and operate more efficently.
• In standby mode nearly all leakage power was eliminated.
Standby mode core power results:
• Leakage power in standby with LongRun2 disabled: 144 mW
• Leakage power in standby with LongRun2 enabled:
2 mW
• Leakage power reduced by ~70x with LongRun2
Special thanks to TSMC for fast cycle times and great yields.
LongRun2 will be announced in Efficeon products at a later time.
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Safe Harbor Statement
This presentation includes certain forward-looking statements
about our new products, roadmaps and other matters. Such
statements speak only as of the date of this presentation, and
we will not necessarily update them or any other forward-looking
statements. Such statements necessarily involve risks and
uncertainty, and our actual results may differ materially from our
present expectations for a variety of reasons.
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TM
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