| timotimo | just a little "general" spesh log viewing shows we have a lot of objects from wvals that don't have a debug_name set. i'm *expecting* those are things that come from nqp, but i can't know until i try a fresh stage0 | 00:04 | |
| it could also be i'm missing some *HOW that should also get the setdebugtypename treatment | |||
| how about EnumHOW for example? | |||
| i can just look that up! | |||
| it could be the setdebugtypename thing wants to live in Perl6::Metamodel::Naming | 00:06 | ||
| instead of the ClassHOW where it currently resides | |||
| gist.github.com/timo/1693af31a1315a56cbf2 - some example output | 00:14 | ||
| i get much more outputs now that i also have it in nqp | 00:21 | ||
| + wval r3(1), liti16(0), liti16(7) (P6opaque: Perl6::Actions+{HAS-decl-actions}) | 00:22 | ||
| + wval r5(1), liti16(0), liti16(7) (P6opaque: Perl6::QGrammar+{q}+{postproc}+{postproc}+{startstop}) | |||
| another data point about things: with a doubled multi dispatch cache i don't get the "without precompiled things, the find_best_dispatchee stuff gets everywhere" behavior any more | 00:24 | ||
| a stage0 update right now will up the stage0 size from 2593K to 2554K (+/- 11K rounding errors) | 00:43 | ||
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| timotimo | hm. our nqp code already goes through a fudger that looks out for #? stuff; maybe we could have a #?if stage2 so we don't have to bumb the stage0 every time we add new ops and want to use them inside nqp | 00:45 | |
| though we may need an additional stage at the end if we have something like that | 00:46 | ||
| if we really want the code that compiles the nqp to be the code that compiled the nqp that compiles the code | |||
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| timotimo | so far i've only considered the effect of making p6opaque smaller in its serialized form on the core setting, but maybe it'd be much more interesting for the stage0? | 13:50 | |
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| hoelzro | I'm reading jnthn++ 's latest post on 6guts; nice trick with the lazy tospace allocation! | 15:19 | |
| jnthn | :) | 15:20 | |
| I thought that was the most boring of the changes :) | |||
| timotimo | hehe. | 15:21 | |
| hoelzro | it's something I never would have thought to do, but makes *so* much sense once having read it | 15:23 | |
| that's what makes it so nice =) | |||
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| timotimo | Introduce a new callchain mode: folded ( perf report -g folded) to print callchains in a line, facilitating perf report output processing by other tools, such as Brendan Gregg's flamegraph tools commit, commit, commit | 15:27 | |
| ^- something added in linux 4.5, which was just released on sunday | 15:28 | ||
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| dalek | arVM: 3c7ee6e | jnthn++ | src/ (5 files): Don't keep around barely-used bytecode maps. These essentially doubled the amount of space we used for bytecode of frames that we actually ran, by keeping around a table noting if each byte was the start of an instruction. This was used for the low level backtraces to give an accurate instruction offset and...that's all! I can't remember the last time I debugged something using that index. Worse, it's misleading because it doesn't actually factor in that we may be in some specialization of the bytecode. So, tossed it for now. 44fcdb3 | jnthn++ | src/ (4 files): Only allocate instrumentation state if needed. We only need to keep it when profiling, doing cross-thread write logs, and so forth. This cuts the size of static frames down by 5 pointers each. On the empty loop program, 144KB saving for NQP and 1,036KB for Rakudo. |
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| [Coke] | aw, lost the commit line. | 16:20 | |
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| dalek | arVM: 457df7c | jnthn++ | src/instrument/crossthreadwrite.c: Fix thinko in an earlier refactor. |
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| arVM: 99bf383 | jnthn++ | src/6model/reprs/MVMMultiCache.h: Boost size of multi-dispatch cache. After finding even simple programs could sometimes end up overflowing it in some cases. This alone cuts 40% off a benchmark submitted by RabidGravy++ doing sine wave generation. |
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| diakopter | o_O | 18:04 | |
| jnthn: yes, the instruction offset was helpful .. early on :D | 18:10 | ||
| (but not since) | |||
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