hkaiser changed the topic of #ste||ar to: STE||AR: Systems Technology, Emergent Parallelism, and Algorithm Research | stellar.cct.lsu.edu | HPX: A cure for performance impaired parallel applications | github.com/STEllAR-GROUP/hpx | Buildbot: http://rostam.cct.lsu.edu/ | Log: http://irclog.cct.lsu.edu/ | GSoC: https://github.com/STEllAR-GROUP/hpx/wiki/Google-Summer-of-Code-%28GSoC%29-2020
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<Yorlik> Now I started using Macros for replacing some inheritance which posed a problem and I'm getting this: "fatal error C1001: Internal compiler error."
<Yorlik> hkaiser: Did you ever run into ICEs (MSVC) when doing Macros?
<zao> Well done!
<Yorlik> It sucks big time tbh.
<zao> With fancypants C++, half the things you do tends to ICE the compiler, particularly if you emit ill-formed code.
<Yorlik> I am using Macros to create template instantiations be redefining them and re-including a header without header guard.
<zao> Halfway to Boost.Preprocessor then :)
<Yorlik> The funny thing is, that intellisense is all happy and shows my Macros are correct.
<Yorlik> Boost Preprocessor? Is that good?
<Yorlik> C++ really needs a way to have something like if constexpr for struct members
<zao> Has some fun things like iterating over PP lists and tuples.
<zao> The best kind of codegen is a separate program with a ton of printfs :D
<zao> (only half kidding)
<Yorlik> I had to refactor my entire way how I am building entities and now after a crap load of work and a constant bad feeling about using Macros now this ...
<Yorlik> Sometime C++ is just .... dunno ... don't really have words
<zao> If you preprocess the file and then feed it to the compiler, does it still ICE?
<zao> Or is it in macro expansion itself?
<Yorlik> I think the macro logic together with repeated header inclusion is too much for it
<zao> Are you just iterating or is it recursing?
<Yorlik> I am defining template specializations like this:
<Yorlik> #define ENTITY_NAME mobile_ent
<Yorlik> #define ENABLE_OBJECT_CONTAINER_COMPONENT
<Yorlik> #define ENABLE_LUA_COMPONENT
<Yorlik> #define ENABLE_DATA1024_COMPONENT
<Yorlik> #define ENABLE_BASE_COMPONENT
<Yorlik> #include "pecs_entity_specialization.hpp"
<Yorlik> And the header is includer after change of the macros
<Yorlik> So - I am doing this for evcery specialization
<Yorlik> I used to have inheritance for this, but it caused some unsolvable issues with our Lua Bindiongs
<Yorlik> So - it's neither iteration, not recursion.
<Yorlik> Just 1-2-3, but repeating the use of the header.
<Yorlik> Which obviously has no header guard.
<Yorlik> After each use of the header all macros are reset - it has an nit and a cleanup sub-header.
<Yorlik> But it's all sequential.
<K-ballo> if you are hitting a limit the ICE will go away by reducing the amount of work, should be trivial to test
<K-ballo> then if you confirm, you can split each instantation into its own TU, which should be an improvement regardless
<Yorlik> Each instantiation is in it's own header, but maybe I should use cpp files including them..
<Yorlik> I'll give it a shot. Thanks K-ballo .
<Yorlik> Not sure how I'd move a template specialization into a separate TU though. After all it lives all in the headers.
<K-ballo> simply being a template specialization doesn't force it to live in headers, but if yours have to for some extra unmentioned reason then you won't be able to change it
<Yorlik> I use the macros to define the members present. If I put all this in the source it will be hidden and not be accessible by functions made for certain specializations..
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<weilewei> Does this hpx benchmark "us/future" mean how many futures in one microseconds? https://github.com/STEllAR-GROUP/hpx/blob/master/tests/performance/local/future_overhead.cpp#L84
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<hkaiser> weilewei: no, it means how many microseconds does one future take
<weilewei> hkaiser Oh yea, that's correct one
<weilewei> hkaiser I got this overhead measurement plot for libcds: https://imgur.com/a/CDAfqJF
<weilewei> not sure why some overhead is negative..
<hkaiser> well, how many measurements have you taken?
<weilewei> 25 for each thread
<hkaiser> ok