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Welcome to the main channel on the development of MoarVM, a virtual machine for NQP and Rakudo (moarvm.org). This channel is being logged for historical purposes. Set by lizmat on 24 May 2021. |
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| Nicholas | good *, new-disp :-) | 06:21 | |
| nine | Yes, new-disp is good indeed! | 06:32 | |
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| nine | People who claim that computers are fast enough already clearly have never run CORE.c compilation in callgrind... | 08:31 | |
| Nicholas | oh my, oh yes. | ||
| and I thought ASAN was tedious | |||
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| nine | Stage parse : 1228.403 | 08:53 | |
| More time for the piano during the comparison run :) | 08:54 | ||
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| Geth | MoarVM/new-disp: 0fed320794 | (Stefan Seifert)++ | 3 files Replace costly $*MAST_FRAME lookup by $frame arg in bytecode generators |
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| nine | According to callgrind, this gets us from 311,532,366,964 (100.0%) PROGRAM TOTALS to 308,948,475,562 (100.0%) PROGRAM TOTALS | 10:42 | |
| Less of a speedup than hoped, but it's at least better | |||
| It's clearly showing a million fewer lookups of dynamics. The part I don't understand is the ~3 million more lexical lookups using the frame walker we now do. | 10:46 | ||
| lizmat | after doing a git pull in rakudo, I get: Too many positionals passed; expected 3 arguments but got 4 | ||
| at /Users/liz/Github/rakudo.moar/install/share/nqp/lib/MAST/Ops.nqp:10964 | |||
| nine | lizmat: did you pull nqp and MoarVM as well? | ||
| lizmat | guess nqp and MoarVM need to be bumped on new-disp as well? | ||
| ah... I need to rebuild :-) | |||
| I'm using the --gen-moar=new-disp trick :-) | 10:47 | ||
| nine | With the situation as fluid as it is, we don't usually bump the revisions. You want to stay on top of the branches at all times anyway and bumps make rebasing a bit more tedious | 10:48 | |
| lizmat | yeah, just rebuilding it makes it work, sorry for the noise :-) | 10:51 | |
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| nine | Huh...according to my fprintf in MVM_frame_find_lexical_by_name, it's actually doing fewer lookups now. 13861659 lookups of $?CLASS instead of 14337557. Others are exactly the same (and so few that they don't even matter) | 11:05 | |
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| timo | huh, "find_lexical_by_name" for $?CLASS? isn't it supposed to go via getlexperinvtype? | 11:07 | |
| nine | getlexperinvtype does use MVM_frame_find_lexical_by_name | ||
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| timo | oh, haha | 11:08 | |
| but we do try to optimize that real good in spesh | 11:09 | ||
| could be a result of not inlining at the moment | |||
| do we have the callgrind numbers for master handy¿ | 11:28 | ||
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| timo | don't want to force 20 minutes of callgrind onto you if not | 11:42 | |
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| Nicholas | good *, brrt | 12:33 | |
| brrt | good * Nicholas | ||
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| nine | master "only" looks up $?CLASS 10921854 times. But there are various other symbols that it looks up quite often that all but disappear from the list in new-disp. Like &needs_cond_passed 75961 vs 5 times or &type_to_local_type 61366 vs 4 or &push_op 33605 vs 9 | 13:50 | |
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| Nicholas | you know when you've been using rr "too much" when the first command you type in gdb is 'c' and it answers back with "The program is not being run." | 18:58 | |
| timo | when you press "c" on your keyboard to turn your computer on | 19:12 | |
| lizmat | ok, getting slightly annoyed now | 19:52 | |
| Missing or wrong version of dependency 'gen/moar/stage2/NQPHLL.nqp' (from 'site#sources/45334C557865A97D1ECA0D3F3A3FAF2017FCE553 (OO::Monitors)') | |||
| I've nuked my install dir and built from scratch (on master) | 19:53 | ||
| decided to uninstall OO::Monitors yet again, and install again, and it works :-( | 19:55 | ||
| sorry for the noise | |||
| and back to failing again :-( | 19:59 | ||
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| lizmat | in the end I did a new rakudo checkout, which appears to have fixed it | 20:24 | |
| dogbert11 | lizmat: have you abandoned new-disp :) | 20:27 | |
| lizmat | I'm not sure what caused this, but yeah: in the middle of migrating modules to the zef ecosystem | 20:29 | |
| and that still has a few rough edges | |||
| it was just one too many variables | |||
| it also was noticeably slower on my local logs server work | 20:31 | ||
| dogbert11 | yeah, it's still a bit slower than master | 20:32 | |
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| timo | one important piece of optimization is missing that currently prevents a lot of inlining, i think? | 20:50 | |
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