226258 2021-05-25 23:58:33 -0700 AirAllocateStackByGraphColoring should use the optimized interference graphs from AirAllocateRegistersByGraphColoring 2021-05-28 11:53:29 -0700 1 1 1 Unclassified WebKit JavaScriptCore WebKit Nightly Build Unspecified Unspecified RESOLVED FIXED https://bugs.webkit.org/show_bug.cgi?id=225848 InRadar P2 Normal --- 226388 1 rmorisset rmorisset annulen benjamin cdumez cmarcelo ews-watchlist fpizlo gyuyoung.kim keith_miller mark.lam msaboff ryuan.choi saam sergio tzagallo webkit-bug-importer oldest_to_newest 1763838 0 rmorisset 2021-05-25 23:58:33 -0700 This would help especially on some Wasm code that has surprisingly dense interference graphs for its stack slots. In particular, tsf-wasm has a couple of functions for which it is roughly 2MB. Even worse, mruby-wasm.aotoki.dev (which caused us to lower Options::maximumTmpsForGraphColoring due to jetsams) has two functions for which it is respectively 215MB and 395MB (if we increase Options::maximumTmpsForGraphColoring from 25k to 50k, as they have roughly 30k temporaries). Early tests indicate that reusing the interference graph datastructures that I added in https://bugs.webkit.org/show_bug.cgi?id=225848 would decrease these sizes: - for test-wasm, from 2MB to roughly 70kB - for mruby-wasm.aotoki.dev, from 215MB to 7MB and from 395MB to 11MB It would also have a large decrease in percentage for most other functions, but with much less impact since most JS functions only have a handful of spill slots if any at all. 1763839 1 429733 rmorisset 2021-05-25 23:59:31 -0700 Created attachment 429733 WIP 1764017 2 429786 rmorisset 2021-05-26 13:05:53 -0700 Created attachment 429786 Patch 1764064 3 mark.lam 2021-05-26 14:43:38 -0700 Looks like the jsc EWS bot failures are real. Can you investigate? 1764149 4 rmorisset 2021-05-26 17:41:27 -0700 (In reply to Mark Lam from comment #3) > Looks like the jsc EWS bot failures are real. Can you investigate? Looking at it. 1764469 5 429915 rmorisset 2021-05-27 13:19:26 -0700 Created attachment 429915 Patch The test failures were caused by a debugging option that I had forgotten to reset to false before committing (AirAllocateStackByGraphColoringInternal::reportLargeMemoryUses). I also tested it on JetStream2 and RAMification, and the patch appears neutral. 1764487 6 429915 rmorisset 2021-05-27 13:46:45 -0700 Comment on attachment 429915 Patch After discussing with Phil, I appear to have some problem with coalescing which I really should fix before trying to land this. 1764522 7 429934 rmorisset 2021-05-27 15:05:29 -0700 Created attachment 429934 Patch Fix a stupid infinite loop in remap() ! Also avoided creating self-interfering edges, so we no longer need to be on the lookout for those. 1764579 8 429934 fpizlo 2021-05-27 16:41:38 -0700 Comment on attachment 429934 Patch View in context: https://bugs.webkit.org/attachment.cgi?id=429934&action=review > Source/JavaScriptCore/b3/air/AirAllocateRegistersByGraphColoring.cpp:1365 > + if constexpr (reportInterferenceGraphMemoryUse && (std::is_same<InterferenceSet, WTF::LargeInterferenceGraph>::value || std::is_same<InterferenceSet, WTF::HugeInterferenceGraph>::value)) { You should do “using WTF::LargeInterferenceGraph” (and ditto for Huge) at the bottom of the file in WTF that defines these things. That way you don’t have to say WTF:: here. That’s what other WTF ADTs do. 1764581 9 ews-feeder 2021-05-27 16:42:39 -0700 /Volumes/Data/worker/Commit-Queue/build/Source/WTF/ChangeLog neither lists a valid reviewer nor contains the string "Unreviewed" or "Rubber stamp" (case insensitive). 1764608 10 429965 rmorisset 2021-05-27 17:43:40 -0700 Created attachment 429965 Patch for landing Thanks Phil for the review. I added the using statements in wtf/InterferenceGraph.h as suggested. 1764609 11 429966 rmorisset 2021-05-27 17:45:48 -0700 Created attachment 429966 Patch for landing I had missed a couple of redundant "WTF::" 1764636 12 ews-feeder 2021-05-27 19:08:28 -0700 Committed r278186 (238229@main): <https://commits.webkit.org/238229@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 429966. 1764637 13 webkit-bug-importer 2021-05-27 19:09:17 -0700 <rdar://problem/78599520> 429733 2021-05-25 23:59:31 -0700 2021-05-26 13:05:53 -0700 WIP patch226258 text/plain 56399 rmorisset ZGlmZiAtLWdpdCBhL1NvdXJjZS9KYXZhU2NyaXB0Q29yZS9iMy9haXIvQWlyQWxsb2NhdGVSZWdp c3RlcnNCeUdyYXBoQ29sb3JpbmcuY3BwIGIvU291cmNlL0phdmFTY3JpcHRDb3JlL2IzL2Fpci9B aXJBbGxvY2F0ZVJlZ2lzdGVyc0J5R3JhcGhDb2xvcmluZy5jcHAKaW5kZXggOWUxNjIzN2E3YmRi Li4yNmI0NGI1ZWIxYWMgMTAwNjQ0Ci0tLSBhL1NvdXJjZS9KYXZhU2NyaXB0Q29yZS9iMy9haXIv QWlyQWxsb2NhdGVSZWdpc3RlcnNCeUdyYXBoQ29sb3JpbmcuY3BwCisrKyBiL1NvdXJjZS9KYXZh U2NyaXB0Q29yZS9iMy9haXIvQWlyQWxsb2NhdGVSZWdpc3RlcnNCeUdyYXBoQ29sb3JpbmcuY3Bw CkBAIC0zOSw3ICszOSw3IEBACiAjaW5jbHVkZSAiQWlyVXNlQ291bnRzLmgiCiAjaW5jbHVkZSA8 d3RmL0hhc2hTZXQuaD4KICNpbmNsdWRlIDx3dGYvSGFzaFRyYWl0cy5oPgotI2luY2x1ZGUgPHd0 Zi9MaWtlbHlEZW5zZVVuc2lnbmVkSW50ZWdlclNldC5oPgorI2luY2x1ZGUgPHd0Zi9JbnRlcmZl 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