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2018-06-28T20:53:58Z

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wiki>Nazg-gul: /* Work Breakdown */

2013-09-18T09:07:26Z

‎Work Breakdown

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= Google Summer of Code: Threaded Dependency Graph =

== General info ==

<strong>Short description.</strong> This project is about improving dependency graph in terms of supporting objects update from multiple threads for multiple purposes (for example, being able to have the same object up-to-date for the viewport and render).

For artists this means faster scene playback and no conflicts between viewport and render threads.

During this project following improvements and changes will be done to the code (bigger milestones are listed):

* Make all object-data related areas (such as curves and metaballs) thread-safe
* Make scene objects update multi-threaded
* Separate data from state, so viewport and render doesn't run into conflict

Here are some links to pages with more detailed info:
* [[User:Nazg-gul/GSoC-2013/RejectedProposals|Rejected proposals]] (proposals made this year but not being accepted, more like for history)
* [[User:Nazg-gul/GSoC-2013/Proposal|Proposal]]
* [[User:Nazg-gul/GSoC-2013/WeeklyProgress|Weekly Progress]]
* [[User:Aligorith/GSoC2013_Depsgraph#Design_Documents|Joshua Leung's]] new dependency graph design overview.

== Project Breakdown ==

Project itself is rather huge, but the list of changes above is actually pretty much nice breakdown and each element from that list defines nice milestone of the project.

Further document is split into separate pages, each of which describes design proposal, implementation details and status of the target.

* [[User:Nazg-gul/GSoC-2013/ThreadSafety|Thread safety]]
* [[User:Nazg-gul/GSoC-2013/ThreadedObjectUpdate|Threaded object update]]
* [[User:Nazg-gul/GSoC-2013/LocalGraphs|Local graphs]]

== Work Breakdown ==

* Making data and code safe for threading:
** {{done||}} Make metaballs safe for threading.
** {{done|}} Make curves code safe for threading.
** {{done||}} Make other objects' data safe threading.
** {{done||}} Make modifier stack safe for threading.
* Scheduler:
** {{done||}} Implement (or re-use/integrate existing ones) task scheduler.
** {{done||}} Switch from sequent object-by-object handle_update to task-based scheduled updates.
** {{done||}} Solve dupli-groups duplications.
** {{done||}} Look into nice balanced load.
** {{todo||}} Support granular update.
* Rendering:
** {{done||}} Support locked interface while rendering.
** {{Inprogress|10|}} Solve viewport/render conflicts.
* Other
** {{done||}} Reshuffle deform weights calculation in shapekeys to solve significant slowdown when doing threaded update.
** {{done||}} Make lock-free guarded allocator with small memory overhead.

== Results ==

[[User:Nazg-gul/GSoC-2013/Results|Here're]] results of project development from users perspective.

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