To be clear, I’m concerned that the 32-bit JIT backends have such bad tuning for these embedded platforms that it’s just pure badness. Until you can prove that you can change this, I think that porting should focus on making the cloop great. Then, we can rip out support for weird CPUs rather than bringing it back.
-Filip > On Jul 5, 2017, at 6:14 PM, Caio Lima <[email protected]> wrote: > > 2017-07-05 18:25 GMT-03:00 Filip Pizlo <[email protected]>: >> You need to establish that the JIT is a performance progression over the >> LLInt on ARMv6. I am opposed to more ARMv6 patches landing until there is >> some evidence provided that you’re actually getting speed-ups. > > It makes sense. I can get these numbers related to JIT. > > BTW, there is a Patch that isn't JIT related > (https://bugs.webkit.org/show_bug.cgi?id=172766). > > Regards, > Caio. > >> -Filip >> >>> On Jun 13, 2017, at 6:48 PM, Caio Lima <[email protected]> wrote: >>> >>> Hi All. >>> >>> Some of you guys might know me through the work I have been doing in >>> JSC. The experience working with WebKit has been great so far, thank >>> you for the reviews! >>> >>> Since 1st May, we at Igalia have been working on bring back the ARMv6 >>> support into JSC. We already have commits into our downstream branch >>> port[2] that fixes some compile/runtime errors when building JSC to >>> ARMv6 and also fixes some bugs. However, this branch is not synced >>> with WebKit upstream tree and I would like to pursue the upstreaming >>> of this ARMv6/JSC support to WebKit. >>> >>> As a long shot, we are planning to maintain the ARMv6 support and make >>> tests run as green as possible. Also, it's our goal make ARMv6 support >>> not interfere with other ARM versions support code negatively and we >>> will be in charge of implement platform-specific fixes/features for >>> JSC/ARM6, this way no imposing burden to the rest of the community. >>> >>> To keep track of work to be done, I've create a meta-bug in >>> bugzilla[3] and it's going to be used firstly to organize the commits >>> from our downstream branch, but pretty soon I'm going to create issues >>> related with javascriptcore-test failures and send patches to fix >>> them. We have already submitted 3 patches (they are marked as >>> dependence of [3]) that fixes ARMv6 into LLInt and JIT layers and got >>> a round of review into them. >>> >>> Best Regards, >>> Caio. >>> >>> [1] - https://www.igalia.com/about-us/coding-experience >>> [2] - https://github.com/WebPlatformForEmbedded/WPEWebKit >>> [3] - https://bugs.webkit.org/show_bug.cgi?id=172765 >>> _______________________________________________ >>> webkit-dev mailing list >>> [email protected] >>> https://lists.webkit.org/mailman/listinfo/webkit-dev _______________________________________________ webkit-dev mailing list [email protected] https://lists.webkit.org/mailman/listinfo/webkit-dev
