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<b>Tracking Bug:</b> [meta] Implement generational garbage collection - <span class="fck_mw_template"><span class="fck_mw_template"><span class="fck_mw_template">{{bug|619558}}</span></span></span> | <b>Tracking Bug:</b> [meta] Implement generational garbage collection - <span class="fck_mw_template"><span class="fck_mw_template"><span class="fck_mw_template">{{bug|619558}}</span></span></span> | ||
< | <h1> Steps </h1> | ||
< | <h2> Exact Rooting done in JS Shell <span class="fck_mw_template"><span class="fck_mw_template">{{bug|753203}}</span></span> </h2> | ||
<p>12 weeks started | <p>12 weeks started | ||
</p> | </p> | ||
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</li></ul> | </li></ul> | ||
</li></ul> | </li></ul> | ||
< | <h2> JIT Integration with post barriers - 4 weeks, parallelized </h2> | ||
<ul><li> IonMonkey <span class="fck_mw_template"><span class="fck_mw_template">{{bug|831506}}</span></span> - 1 week (bhackett) | <ul><li> IonMonkey <span class="fck_mw_template"><span class="fck_mw_template">{{bug|831506}}</span></span> - 1 week (bhackett) | ||
</li><li> JaegerMonkey <span class="fck_mw_template"><span class="fck_mw_template">{{bug|764876}}</span></span> - 2 days (bhackett) | </li><li> JaegerMonkey <span class="fck_mw_template"><span class="fck_mw_template">{{bug|764876}}</span></span> - 2 days (bhackett) | ||
</li><li> Baseline JIT <span class="fck_mw_template"><span class="fck_mw_template">{{bug|831507}}</span></span> - <ask jandem/djvj for an estimate> | </li><li> Baseline JIT <span class="fck_mw_template"><span class="fck_mw_template">{{bug|831507}}</span></span> - <ask jandem/djvj for an estimate> | ||
</li></ul> | </li></ul> | ||
< | <h2> Generational Garbage Collection in the Shell </h2> | ||
<ul><li> Implement prototype algorithm (terrence) - 1 week | <ul><li> Implement prototype algorithm (terrence) - 1 week | ||
</li><li> This is a potential milestone: we would need to build it and test it on TBPL similar to how |r| works now -- |GGCJS|. | </li><li> This is a potential milestone: we would need to build it and test it on TBPL similar to how |r| works now -- |GGCJS|. | ||
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</li></ul> | </li></ul> | ||
</li></ul> | </li></ul> | ||
< | <h2> Exactly Root the Browser <span class="fck_mw_template"><span class="fck_mw_template">{{bug|831379}}</span></span> - 10 weeks </h2> | ||
<ul><li> This is a potential milestone: we would turn on exact rooting for release FF at this point. We would not get a performance boost from this (necessarily), but it would lock in our work to this point. | <ul><li> This is a potential milestone: we would turn on exact rooting for release FF at this point. We would not get a performance boost from this (necessarily), but it would lock in our work to this point. | ||
</li></ul> | </li></ul> | ||
< | <h2> Performance Tuning - 4 weeks (This should probably start asap) </h2> | ||
<ul><li> Implement a Nursery <span class="fck_mw_template"><span class="fck_mw_template">{{bug|706885}}</span></span> - 1 week | <ul><li> Implement a Nursery <span class="fck_mw_template"><span class="fck_mw_template">{{bug|706885}}</span></span> - 1 week | ||
</li><li> Test against V8 Earley-Boyer benchmark. | </li><li> Test against V8 Earley-Boyer benchmark. | ||
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</li><li> Refactor code to avoid rooting on hot paths and keep rooter overhead acceptable <span class="fck_mw_template"><span class="fck_mw_template">{{bug|831886}}</span></span> (bhackett) - done | </li><li> Refactor code to avoid rooting on hot paths and keep rooter overhead acceptable <span class="fck_mw_template"><span class="fck_mw_template">{{bug|831886}}</span></span> (bhackett) - done | ||
</li></ul> | </li></ul> | ||
< | <h2> Make the Post Barrier Verifier Green in the browser <span class="fck_mw_template"><span class="fck_mw_template">{{bug|764882}}</span></span> </h2> | ||
<ul><li> Investigate how long it will take to do generational barriers - 1 week | <ul><li> Investigate how long it will take to do generational barriers - 1 week | ||
</li><li> We may need to rewrite the maps in xpconnect and the browser in terms of HashTable: this could be a bunch of work. | </li><li> We may need to rewrite the maps in xpconnect and the browser in terms of HashTable: this could be a bunch of work. | ||
</li><li> Make JS_IsAboutToBeFinalized indirect <span class="fck_mw_template"><span class="fck_mw_template">{{bug|765432}}</span></span> - 10 weeks | </li><li> Make JS_IsAboutToBeFinalized indirect <span class="fck_mw_template"><span class="fck_mw_template">{{bug|765432}}</span></span> - 10 weeks | ||
</li></ul> | </li></ul> | ||
< | <h1> Other </h1> | ||
<ul><li> Should we establish a new benchmark specifically for GGC. (sfink votes yes) | <ul><li> Should we establish a new benchmark specifically for GGC. (sfink votes yes) | ||
<ul><li> What would it measure? there are multiple goals, e.g. throughput/MMU/pause time | <ul><li> What would it measure? there are multiple goals, e.g. throughput/MMU/pause time | ||
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</li></ul> | </li></ul> | ||
</li></ul> | </li></ul> | ||
< | <h1> Risks </h1> | ||
<ul><li> Team is responsible for many top crashers | <ul> | ||
</li | <li> Team is responsible for many top crashers</li> | ||
<li> External rooting API has not been designed</li> | |||
</li | <li> GGC algorithm has not been decided on - it may not be faster</li> | ||
<li> JSD1 exact rooting is lurking</li> | |||
</li | </ul> | ||
</li></ul | |||