Transcript Provider of Ada Software Components

Top Graph'
Provider of Ada Software Components
[email protected]
US Representative : S.Ron Oliver, [email protected]
Products

XInAda
Full Ada implementation of X11 and Motif
libraries

OrbRiver
The only three-languages CORBA 2.4
ORB sharing a common technology
 Ada
 Java
 C++
October 3, 2001
(comming soon)
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OrbRiver

OrbAda
Pure Ada 95 implementation

OrbRiver for Java
Support for Java applications

OrbAda-Critical
Support for real-time & embedded
systems
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Contents of the presentation
Overview of OrbAda
 Performance
 CORBAizing legacy Ada applications

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Overview of OrbAda

Corba 2.4 compliant
Many features of CORBA 3 implemented
or soon will be
Ada 95 implementation
 Fast and Reliable
 Designed for efficient administration

Multi-threaded library and server ORB
Configuration and administration facilities
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Performance: Request handling
Direct marshalling to output stream
 No marshalling for co-located calls
 Direct unmarshalling from input stream

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Performance: Optimized features
«Any» processing nearly as fast as for
original type
 Method name to method quick
translation
 Fast POA retrieval
 Fast ObjectId to object translation
 Stream memory reuse

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Performance: Optimizing IDL
Compiler
When possible, generated Ada
representation of data is CDR
representation
 Extra «any» improvement
 Co-located calls handlers

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Performance Test

Requests of array of the structure
struct Info { double D [2]; long L[6] ; short
S[8] ; char C[16] ; } ;

Test on Linux (Celeron 400MHz)
Info [2] => 0.40 ms
Info [333] => 1.36 ms
Any (Info[2]) => 0.48 ms
Any (Info [333]) => 2 ms
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Performance Comparisons
S. Char
B. Char
S. Short
B. Short
S. Long
OrbAda
Orbacus
TAO
B.Long
S. Double
B.Double
S. Info
B. Info
S. Any
B. Any
0.00
2.00
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4.00
6.00
8.00
10.00
12.00
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20.00
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CORBAizing Legacy
Applications
To make software evolution easier
 To have access to new applications
 To keep efficient and well tested
sofware

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Replacing Legacy Middleware
Asynchronous and synchronous
communication
 Message broadcast
 Message coalescence

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OrbAda Specific IDL pragmas
«range» to limit scalar values,
preserving original design
 Ada code insertion in client-side spec
and body, for code which cannot be
expressed in IDL

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Additionnal Features
Multicasting POA and IOP profile
 Efficient Event service

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That’s all, Folks
Thanks for attending.
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