Ichthyostega
b556d2b770
Some sections of the Lumiera website document meeting minutes, discussion protocols and design proposals from the early days of the project; these pages were initially authored in the »Moin Moin Wiki« operated by Cehteh on pipapo.org at that time; this wiki backed the first publications of the »Cinelerra-3« initiative, which turned into the Lumiera project eventually. Some years later, those pages were transliterated into Asciidoc semi-automatically, resulting in a lot of broken markup and links. This is a long standing maintenance problem problem plaguing the Lumiera website, since those breakages cause a lot of warnings and flood the logs of any linkchecker run.
154 lines
3.9 KiB
Text
154 lines
3.9 KiB
Text
Resource Management: Budgeting
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==============================
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// please don't remove the //word: comments
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[options="autowidth"]
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|====================================
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|*State* | _Idea_
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|*Date* | _Fri Jul 23 20:33:32 2010_
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|*Proposed by* | Christian Thaeter <ct@pipapo.org>
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|====================================
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[abstract]
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******************************************************************************
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The link:{rfc}/ResourceManagementProfiling.html[Profiler]
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will give some Idea about how much Resources can be used to
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optimally utilize the system. Knowing this number leads to the next challenge,
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distributing the resources to different subsystems, jobs and objects. Here, I
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introduce a budgeting system which takes care of this.
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******************************************************************************
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Description
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-----------
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//description: add a detailed description:
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The idea is quite simple, for each kind of resource we have a global budget
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manager which accounts for the available and used amounts of this resource.
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Each user of a resource has its own account managing his share on the resource.
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The system is completely voluntary giving only hints how much of a resource is
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available for anyone.
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Tasks
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~~~~~
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// List what would need to be done to implement this Proposal in a few words:
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* define a sufficiently well defined goal first, to describe
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what shall and can be achieved through budgeting ...
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* then develop a plausible model of suitable control and regulation mechanisms
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* very likely, practical tests will be required to show the feasibility of
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effective automatic regulation over a significant span of different
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use cases!
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Discussion
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~~~~~~~~~~
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Pros
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^^^^
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// add just a fact list/enumeration which make this suitable:
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// * foo
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// * bar ...
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Cons
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^^^^
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// fact list of the known/considered bad implications:
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Alternatives
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^^^^^^^^^^^^
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//alternatives: if possible explain/link alternatives and tell why they are not viable:
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Rationale
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---------
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//rationale: Describe why it should be done *this* way:
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//Conclusion
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//----------
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//conclusion: When approved (this proposal becomes a Final) write some
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// conclusions about its process:
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Comments
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--------
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//comments: append below
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[source,C]
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------------------------------------------------------------------------------
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typedef ssize_t budget_count;
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struct budgetmanager
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{
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rwlock lock;
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void (*callback)(); // called on resource shortage
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(resource collector)
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int sum_priorities; // sum of all client budgets .. each
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client is granted available/(sum_priorities/own_priority) of the resource
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budget_count available_prefs; // configuration from preferences
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budget_count available_profile; // tuned by profiler
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int available_factor; // how much % from prefs vs profile
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budget_count available; // caclulated from above
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budget_count allocated; // actively in use
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};
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struct budget
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{
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BudgetManager manager;
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int priority;
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budget_count allocated;
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};
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------------------------------------------------------------------------------
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ct:: '2010-07-23 20:55:49 CEST'
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....
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....
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[[caveat]]
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[underline]#Many years later,# I'd like to confirm that this RfC describes
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a part of the *core vision*: +
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the engine shall make best use of limited resources.
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CAUTION: The same caveats as for the
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link:{rfc}/ResourceManagementProfiling.html#caveat[Profiling]
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do apply here as well...
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I'd recommend to be extremely cautions to take any achievement for granted
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for this topic, which is known to be notoriously difficult and insidious.
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With _budgeting alone,_ we may be able to prevent overload of the system,
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yet for anything beyond that, we need an actual optimisation strategy.
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Ichthyostega:: '2025-09-17'
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//endof_comments:
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''''
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Back to link:/x/DesignProcess.html[Lumiera Design Process overview]
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