Difference between pages "D45 Prover Enhancement" and "D45 Scalability"
imported>Tommy |
imported>Tommy m (→Overview) |
||
| Line 1: | Line 1: | ||
= Overview = | = Overview = | ||
| − | * | + | * '''Improved Performance''' According to the refocus mentionned in the [[D45_General_Platform_Maintenance#Motivations| General Platform Maintenance]] chapter, much of the reworking efforts performed on the core plateform basically aimed to overcome Rodin scalability weaknesses, and the continuous need of seamless proving experience. The whole performance was enhanced by core implementation and user interface refactorings. Improvements made to the proving experience will be detailed in a separate chapter. |
| − | * {{TODO}} An overview of the contribution about the | + | * {{TODO}} An overview of the contribution about the design pattern management / Generic Instantiation (Thai Son Hoang) |
| − | * | + | * '''Edition''' It appeard, even more during the two last years of DEPLOY, the models defined by pilots becoming industrial sized due to the level of complexity reached, that the edition became a central concern. |
= Motivations = | = Motivations = | ||
| − | |||
| − | |||
| − | == | + | == Improved Performance == |
| − | + | It appeared that the various DEPLOY partners encountered several major issues while editing large models. Some were related to the core code of the Rodin platform, causing crashes, loss of data, corruption in models. Some other were related to the UI causing platform hanging, and sometimes leading to its freezing which required sometimes to kill the Rodin process, thus also leading to potential loss of data and corruption in models. Hence, it appeared necessary to solve such issues before the end of DEPLOY. | |
| − | |||
| − | == | + | == Design Pattern Management / Generic Instantiation == |
| − | {{TODO}} ''To be completed by | + | {{TODO}} ''To be completed by Thai Son Hoang'' |
| − | == | + | == Edition == |
| − | {{TODO}} '' | + | {{TODO}} ''To be completed by Thomas Muller, Ingo Weigelt'' |
| − | |||
| − | |||
= Choices / Decisions = | = Choices / Decisions = | ||
| − | == | + | == Improved Performance == |
| − | + | SYSTEREL lead a two phase investigation to have a better idea of the work to be done. Each phase being followed by some refactoring of the code. Out of the early investigation, a cause and effect relationship has been found between perfomance loss and the various reported bugs, such as "platform hanging" bugs or even "no more handle" bugs related to the high consumption of graphical elements on Windows platforms. Indeed, it appeared that solving the performance issues sometimes solved induced bugs as well which made the scalability improvement tasks emcompass the maintenance goals.<br> | |
| − | + | Later, a deeper investigation was performed, to indentify and tackle the remaining performance issues. Profiling and code review were the two techniques used. The profiling strategy allowed to get a better localisation of the performance loss in both UI and core code while the code review helped to understand the intrinsic misuses or drawbacks of particular components and/or architectures. | |
| − | + | A good example, was the Event-B built-in editor based on form editors with a high use of greedy graphical components. Such architecture appeard to be weak when it was needed to display industrial size models. This affected the modelling experience with some long, and really annoying to the user, reaction lags. To solve such issue, it has been chosen to refactor the editors using a textual representation which was a light-weight graphical alternative to lower the number of needed components. | |
| − | |||
| − | == | + | == Design Pattern Management / Generic Instantiation == |
| − | {{TODO}} ''To be completed by | + | {{TODO}} ''To be completed by Thai Son Hoang'' |
| − | == | + | == Edition == |
| − | {{TODO}} '' | + | {{TODO}} ''To be completed by Thomas Muller, Ingo Weigelt'' |
| − | |||
| − | |||
= Available Documentation = | = Available Documentation = | ||
| − | * {{TODO}} Links for | + | * {{TODO}} Links for Improved Performance |
| − | * {{TODO}} Links for | + | * {{TODO}} Links for Design Pattern Management / Generic Instantiation |
| − | + | * {{TODO}} Links for Edition | |
| − | |||
| − | * {{TODO}} Links for | ||
= Status = | = Status = | ||
| − | == | + | == Improved Performance == |
| − | + | The refactoring made on both core code and UI code allowed to gain up to 25 times speed-up on the UI, and almost a 2 times speed-up in the core code, making the platform usable in an industrial sized context.<br> | |
| − | == | + | |
| − | {{TODO}} ''To be completed by | + | == Design Pattern Management / Generic Instantiation == |
| − | == | + | {{TODO}} ''To be completed by Thai Son Hoang'' |
| − | {{TODO}} ''To be completed by | + | == Edition == |
| − | + | {{TODO}} ''To be completed by Thomas Muller, Ingo Weigelt'' | |
| − | |||
| − | |||
| − | |||
[[Category:D45 Deliverable]] | [[Category:D45 Deliverable]] | ||
Revision as of 18:38, 18 November 2011
Overview
- Improved Performance According to the refocus mentionned in the General Platform Maintenance chapter, much of the reworking efforts performed on the core plateform basically aimed to overcome Rodin scalability weaknesses, and the continuous need of seamless proving experience. The whole performance was enhanced by core implementation and user interface refactorings. Improvements made to the proving experience will be detailed in a separate chapter.
- TODO An overview of the contribution about the design pattern management / Generic Instantiation (Thai Son Hoang)
- Edition It appeard, even more during the two last years of DEPLOY, the models defined by pilots becoming industrial sized due to the level of complexity reached, that the edition became a central concern.
Motivations
Improved Performance
It appeared that the various DEPLOY partners encountered several major issues while editing large models. Some were related to the core code of the Rodin platform, causing crashes, loss of data, corruption in models. Some other were related to the UI causing platform hanging, and sometimes leading to its freezing which required sometimes to kill the Rodin process, thus also leading to potential loss of data and corruption in models. Hence, it appeared necessary to solve such issues before the end of DEPLOY.
Design Pattern Management / Generic Instantiation
TODO To be completed by Thai Son Hoang
Edition
TODO To be completed by Thomas Muller, Ingo Weigelt
Choices / Decisions
Improved Performance
SYSTEREL lead a two phase investigation to have a better idea of the work to be done. Each phase being followed by some refactoring of the code. Out of the early investigation, a cause and effect relationship has been found between perfomance loss and the various reported bugs, such as "platform hanging" bugs or even "no more handle" bugs related to the high consumption of graphical elements on Windows platforms. Indeed, it appeared that solving the performance issues sometimes solved induced bugs as well which made the scalability improvement tasks emcompass the maintenance goals.
Later, a deeper investigation was performed, to indentify and tackle the remaining performance issues. Profiling and code review were the two techniques used. The profiling strategy allowed to get a better localisation of the performance loss in both UI and core code while the code review helped to understand the intrinsic misuses or drawbacks of particular components and/or architectures.
A good example, was the Event-B built-in editor based on form editors with a high use of greedy graphical components. Such architecture appeard to be weak when it was needed to display industrial size models. This affected the modelling experience with some long, and really annoying to the user, reaction lags. To solve such issue, it has been chosen to refactor the editors using a textual representation which was a light-weight graphical alternative to lower the number of needed components.
Design Pattern Management / Generic Instantiation
TODO To be completed by Thai Son Hoang
Edition
TODO To be completed by Thomas Muller, Ingo Weigelt
Available Documentation
- TODO Links for Improved Performance
- TODO Links for Design Pattern Management / Generic Instantiation
- TODO Links for Edition
Status
Improved Performance
The refactoring made on both core code and UI code allowed to gain up to 25 times speed-up on the UI, and almost a 2 times speed-up in the core code, making the platform usable in an industrial sized context.
Design Pattern Management / Generic Instantiation
TODO To be completed by Thai Son Hoang
Edition
TODO To be completed by Thomas Muller, Ingo Weigelt
