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RealView® Tools for Linux

Philippe Robin, Product Manager

Embedded Software Division

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Open Source and Linux Kernel

www.kernel.org

Linux Vendors

Architecture & PlatformsSilicon Partners

etc...

Development Model

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ARM Embedded Software Products

Energy Management

Security

Execution Acceleration

Graphics

Intelligent Energy Manager

ARM Software Division develop optimized products and solutions for ARM platforms:

Validated with Linux based platforms

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ARM Contributions to Open SourceARM contributes architectural support to Linux kernel and related GNU projects

ARM® architecture and technologiesARMv6, ARMv7 architectureSMP, support for Java acceleration etc.

Promotes standardization initiativesNew ABI for the ARM architecture

Provides early access to technology to promote adoption by the open source community

Cooperation with ARM Partners and open source community members

Promotes active participation and contribution to open source projects

www.arm.com/linux (pre-built images and early access)www.linux-arm.org (ARM Linux Wiki)

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Support for the ARM ArchitectureLinux is used at a very early stage to validate new processors and technology

Used with simulation modelsUsed with FPGAs and test chips as they become available

ARM contributes architectural support to GNU tools (GCC, binuti ls and GDB)

Linux kernel still relies strongly on GCCThe new ABI for ARM architecture provides more flexibility with regard to development tool chains

Interoperability between multiple tool chains (including GCC andRVCT)Re-use of existing application code base Save costly re-writes of existing code

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ARM GNU ToolsEnsure that GCC support for ARM architecture tracks the main GCC trunkTrack ARM architecture roll-out

Currently support architectures up to ARMv6Contributing ARMv7 architecture support

Optimization for some popular ARM µ-architecturesIn the order of 15%-20% performance gain

Create long-term binary compatible releases of the GNU tools for the ARM architecture

Create a configuration that complies with the ABI for the ARM Architecturei.e. arm-none-linux-gnueabiStable bi-annual releasesARM ABI compliant version of GCC now available

Enable interoperability of objects generated by ABI-compliant compilersReuse of existing code base

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ARM GNU ToolsCooperation with CodeSourcery (www.codesourcery.com)

Integrate and release new architectural support into GCC mainline tree

Bi-annual release of pre-built GCC/Glibc

Open discussion forum for specific GCC questions to complement existing public forums

Provide additional support and services for GNU tools

Adoption of the new ABI for the ARM ArchitectureBetter portability of binary codeAllows greater interoperability between proprietary tool chains (RVCT, etc.)http://www.arm.com/products/DevTools/ABI.html

Open access to pre-built GNU binariesFacilitates access to ARM development environmentEnables early adoption of new architectural features

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Linux – Debug with GDBGDB support

GDB is a popular open source debugger for LinuxArchitectural support added for new cores

Partly done when adding processor support in binutilsCurrently has support for cores up to ARMv6 architectureCan use RealView ICE as a transport via JTAG

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Eclipse IDE for Linux Development

Stationery

Create new C/C ++ p rojects customize d fo r you r ta rget hardw are and OS requi rem ents

CodeWarrior Importer

Impor t you r Cod eWarri or f or RVDS projects. Wr ap extern al buil d syste ms (such as mak e)

Simulators

Fast “C ode -Tr anslati on”simulato rs, ide al fo r applicatio n dev elop ment

Profiling & Analysis

Perspective for vi ewing multi-source pro filing d ata in ord er to ref actor and opti mize

RVD IntegrationPlannedIntegr ation of th e RealView debug ger pr ovides power ful debug cap abilities

GDB over RVI

Control y our tar get f rom Eclipse with RVI. Or commu nicate with GDB stu b or GDB serv er over real or simulate d Ether net

Flash Programming

High-sp eed w riting t o flash memo ry o n the targ et fr om inside th e IDE

SPIRIT Editor

Easily edit ta rget descripti ons th at ca n configu re m any EDA tool -chains

Online UpdateReleasedOur lat est plu g-ins, docum entati on, releas e-notes a nd t utori als ar e available online :

http://www.a rm.c om/e clipse

Development

Eclipse, the CD T, a nd th e ARM Re alView tools are t her e to help y ou at ever y stag e of t he develop men t cycle. Wh ethe r yo u’re tw eakin g you r com piler s etting s, elimi nating war nings, or just browsin g a la rge code bas e, thes e to ols will lead you st raig ht to t he h eart of th e task, savin g valu able ti me a nd p ermit ting y ou to c once ntra te o n pr oduci ng hig h qu ality software .

User AssistanceIn devel opm entFro m the i nitial welc ome screen, and thr ough out t he develop men t pr ocess, samples, tuto rials a nd extensive help docum entati on im prov e th e user ex peri ence

LocalizationIn QAエクリプスは多くの言語化で

きます。ARMのプラグインは韓国語化と日本語化できます。

Source Control

Check-o ut, sync hro nize, branc h an d me rge proj ects with plug gable supp ort f or content -m anag eme nt systems

*

*

*

*

New Plug-ins

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Why RealView Tools for Linux?Save memory and improve performance by compiling apps and shared libraries using RealView Compilation Tools JTAG connection for debug (no need for serial/Ethernet port)

Debug of kernel, device drivers and applicationsReal-time trace and profi ling of the Linux kernel

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Quotes

“Nokia is pleased to offer Symbian OS OEM developers beneficial integration w ith RealView Development Suite 3.0 compilation tools in the Nokia Carbide.c++ Developer, Professional and OEM Edition tools,” said D’Arcy Salzmann, head of Product Management, Developer Tools, Nokia. “OEMs creating new Symbian OS mobile phones w ill be able to improve system performance and decrease the size of their ROM budgets w ith the higher-performance code produced by the latest compilation tools.”

“ARM has developed RealView Compilation Tools for Symbian, which are exclusively available to Symbian and Symbian partners. Symbian OS is created using RealView Technology. RealView Compilation Tools are developed to deliver the tightest code density to signif icantly reduce image size.”

“With the RealView Development Suite 3.0, our customers can achieve signif icant code size reduction for Linux applications,” said Jim Ready, CEO, MontaVista Software, Inc. “For the OEM, this saves money by allow ing a smaller memory footprint, w hich reduces build cost. For the consumer, this offers longer battery life for mobile products.”

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RealView Superior Code Generation ToolsGenerate significantly smaller code than GCC

New RealView code generation tools produce space savings of: †

Up to 23% for ARM code and 33% for Thumb code over GNU while maintaining compatibilityThumb-2 code as small as Thumb code and up to 18% faster

Automatically remove redundant code Optimize code across multiple compilation units with multi-file compilationAutomatic compression of Read/Write data areas for optimal ROM size

Generate significantly faster executing code than GCCNew compiler optimization engine gives performance improvements of:

Up to 47% faster ARM code than GNU ‡

Up to 42% faster Thumb code than GNU ‡ † with –Ospace option‡ with –Otime option

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Traditional Embedded Linux Development

Build and f lashPrintf debuggingkgdb for modulesgdb for applicationsFilesystem

Serial

Flash

Ethernet

Host

Console

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Traditional Embedded Linux Development

.s f iles

.c f iles

Kernel

.c f iles

Apps and shared libs

gas

gcc

gcc

gld

gld

Kernel binaryapp1

app2lib1

lib2

GDB

GDB

gdbstubgdbserver

Serial / Ethernet

Serial

Target

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Embedded Linux Development with RealViewCompilation

Compile Linux kernel w ith GCCCompile applications libraries w ith compilation tools in RealView Development Suite

Kernel bring-up using debugger in RealView Development Suite

Build kernel and run from RAMSymbolic debug for statically linked modulesVisualization of kernel resourcesTrace kernel and statically loaded objects (drivers/libraries)

Apps debug using GDB and RealView ICEGDB server for application debug over DCCGDB console debugging over DCC

Trace kernel and statically loaded objects

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Build with RealView Tools - Debug via GDB+ICE

.s f iles

.c f iles

Kernel

.c f iles

Apps and shared libs

ABI-gcc

Kernel binaryapp1

app2lib1

lib2

gdbserver

RVCT Compiler

RVI

RVI

ABI-gcc

gdbstubABI-GLD

ABI-GLDor RVDS

linker

ABI-GAS

ABI-GDB

ABI-GDB

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Enhanced Debug Experience- HW DebugRealView ICE - high performance JTAG run control unit

GNU/Linux tools flow interoperabilityCan connect with GDB and KGDBAllows Linux targets to mount host file system via DCC

Faster downloadDownload speeds up to 1.3Mbytes/second

Enhanced connectivityEthernet 10/100 baseT and USB-2 connectivity

Support for multi-core DSP connectionsARM+StarCore, CEVA, Zoran, ZSP, and Proprietary 3rd party CPU bespoke solutions possibleARM homogeneous multi-core systems

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ABI-gcc

Build and Debug with RealView Development Suite

.s f iles

.c f iles

Kernel

.c f iles

Apps and shared libs

ABI-GCC

RVCT Compiler

Kernel binaryapp1

app2lib1

lib2

gdbserver

RVIGLD

ABI-GAS

RVD

RVI RVDRVDS linker

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RealView OS Debug for LinuxFeatures

Support Linux kernel porting and developing device driversAccess to kernel resources, memory...

All changes are color coded so they are clearly seenSupports both single and multi-core Linux applicationsUse Trace/ETM information to track kernel’s execution

BenefitsExtensive control of processor and platform resourcesHelp to find resource bottlenecks and starvationTechnology host resident over JTAG

RealView-ICE download at 1.3Mb/sec

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Code Size and Performance HistoryARM9E™ROM size vs.performance

46 benchmarks48 applications9 Mbytes ROM

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RVDS 3.0 Thumb-2 on ARM1156T2-SRVDS 3.0 Thumb-2 on ARM1156T2-S FPGA, 64K Data cache/ 64K

instruction cache

50%

55%

60%

65%

70%

75%

80%

85%

90%

95%

100%

50%55%60%65%70%75%80%85%90%95%100%

ROM size compared to ARM Otime

Perf

orm

ance

com

pare

d to

AR

M O

time

ARM Oti meThumb- 2 OtimeThumb Oti meARM OspaceThumb- 2 OspaceThumb Ospace

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RVCT EEMBC / DHRY BenchmarksEEMBC per area

RVCT faster than gcc

CPU

120%ARM946E-S 97%ARM1136J-S+VFPv2

DHRYstoneRVCT 3.0 versus GCC 4.1 performance

EEMBC per areaRVCT 3.0 vs GCC 4.1 Performan ce EEMBC

0%

5%

10%

15%

20%

25%

30%

35%

40%

automo tiveMark networkingMark office Mark

% R

VCT

bet

ter t

han

GC

C

.

RVCT 3.0 vs GCC 4.1 Cod eSize EEMBC

48%

50%

52%

54%

56%

58%

60%

Auto mot ive networking office telecom

% R

VCT

bet

ter t

han

GC

C

mpcorearm1136jf-sarm946e-s

mpcorearm1136jf-sarm946e-s

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SummaryARM is…

Delivering optimized GNU tools for ARM via CodeSourceryPromoting interoperability via GNU ARM ABI complianceTargeting its RealView tools for Embedded LinuxProviding OEMs who use Embedded Linux with:

Competitive open source toolsRealView DEVELOP tools that inter-work with GNU and deliver:

Significant performance improvementSignificant cost reductionJTAG debug solution for Linux