#ste||ar on 2021-03-10 — irc logs at irclog.cct.lsu.edu

2020-09-17 16:16 K-ballo 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/

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05:35 <sauravjoshi23> Hello all. I am new to this community. Looking forward to learn new things😃

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06:05 <zao> Hi there.

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07:25 <jaafar> anyone awake? I have done something stupid and am getting a "empty function object should not be used" exception

07:25 <jaafar> Does this suggest a course of action? thx

08:07 <ms[m]> jaafar: you may have moved a function at some point (inadvertently), but it doesn't say much more without a bit of context

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11:50 <jedi18[m]> typename F = detail::less , what's detail::less?

11:50 <gonidelis[m]> permalink?

11:51 <jedi18[m]> https://github.com/STEllAR-GROUP/hpx/blob/76ff850f86fc147594fdf687ecce9f59456382a6/libs/parallelism/algorithms/include/hpx/parallel/container_algorithms/minmax.hpp#L91

11:53 <jedi18[m]> Also why do we use ::type instead of ::iterator_type here? https://github.com/STEllAR-GROUP/hpx/blob/76ff850f86fc147594fdf687ecce9f59456382a6/libs/parallelism/algorithms/include/hpx/parallel/container_algorithms/replace.hpp#L92

11:53 <K-ballo> range_iterator -> range_traits<>::iterator_type

11:54 <gonidelis[m]> jedi18:

11:54 <gonidelis[m]> https://github.com/STEllAR-GROUP/hpx/blob/76ff850f86fc147594fdf687ecce9f59456382a6/libs/parallelism/execution/include/hpx/execution/algorithms/detail/predicates.hpp#L317

11:54 <gonidelis[m]> fyi I `git grep`ped "struct less"

11:54 <jedi18[m]> <K-ballo "range_iterator -> range_traits<>"> Ohh ok, thanks

11:54 <gonidelis[m]> I dont know if that's the most efficient way but it works for me

11:55 <jedi18[m]> Thanks, I searched less but there were a lot of results, should've realized "struct less" was what I should searched instead

11:55 <gonidelis[m]> ;) jedi18 did that too

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14:45 <hkaiser> srinivasyadav227: have you been able to overcome your build problems now?

14:51 <srinivasyadav227> hkaiser: no

14:51 <hkaiser> could you post your problems again, please?

14:52 <srinivasyadav227> ok one min

14:53 <srinivasyadav227> make error : https://gist.github.com/srinivasyadav18/9517ca31fd303a8b4ff1a6c8c3dc949d

14:56 <hkaiser> srinivasyadav227: this looks like some missing header file, no bid deal

14:58 <hkaiser> no, rather a namesace change that was not propagated

14:58 <srinivasyadav227> ya..but I could not figure out what are the required headers for it..

15:02 <srinivasyadav227> this one got declared before? hpx::parallel::util::loop(ExPolicy&&, Begin, End, CancelToken&, F&&)’ conflicts with a previous declaration

15:04 <hkaiser> srinivasyadav227: please replace the file that generates the errors with this: https://gist.github.com/hkaiser/46bf4d0b9231325edb25f715c086d19c

15:05 <hkaiser> ii.e. this: hpx/libs/parallelism/executors/include/hpx/executors/datapar/execution_policy.hpp

15:05 <srinivasyadav227> ok

15:05 <hkaiser> let's see if that helps

15:05 <hkaiser> I blindly changed things without trying ;-)

15:06 <srinivasyadav227> ok, ;) I will try..few mins please

15:14 <hkaiser> srinivasyadav227: I'm installing vc now, let's see

15:14 <srinivasyadav227> hkaiser: ok

15:15 <srinivasyadav227> build in progress, im just waiting for it ;)

15:16 <srinivasyadav227> you included proper namespace right? like things which were not found were in parallel::execution ?

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15:25 <hkaiser> srinivasyadav227: yah, might not be enough, though - so I'll fix it locally and create a PR

15:25 <srinivasyadav227> actually yea..it failed again

15:26 <srinivasyadav227> I was just creating a gist for error

15:26 <hkaiser> nvm, give me a day or so

15:26 <srinivasyadav227> yea, sure..np..till then I will try to understand loop.hpp

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17:16 <hkaiser> srinivasyadav227: please see https://github.com/STEllAR-GROUP/hpx/pull/5235

17:23 <K-ballo> HPX_INVOKE_result lol, how did that happen? bad search and replace on my part?

17:24 <K-ballo> left un-compiled for.. months? years?

17:26 <hkaiser> indeed

17:33 <gonidelis[m]> it's always a <tag>_invoke_<result>

17:51 <gnikunj[m]> lol what did we have HPX_INVOKE_result for? fallback to something like std::result_of if std::invoke_result is not available?

17:57 <K-ballo> we did not have HPX_INVOKE_result

17:57 <K-ballo> we had hpx::util:invoke_result, and someone (me) replaced calls to hpx::util::invoke with HPX_INVOKE

17:58 <K-ballo> (we still have hpx::util::invoke_result)

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19:41 <jaafar> ms[m]: thanks for the idea! I will see if that triggers something

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19:53 <hkaiser> jaafar: our util::function relies on some static data that needs to be initialized at startup

19:54 <hkaiser> I have seen this if the initialization sequence is wrong and other global things rely on the function before it's initialized

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20:48 <akheir> hkaiser: did you have chance to look at Frank's quote?

20:48 <hkaiser> akheir: Ram wants to talk about this, I have the impression he will backtrack on his own steps :/

20:48 <hkaiser> let's see

20:49 <hkaiser> I'll talk to him tomorrow

20:49 <akheir> we talk briefly this morning and we will talk to him tomorrow

20:49 <hkaiser> ok

20:50 <akheir> The price on disks are ridiculously high and more importantly we are under budget. what should we add?

20:51 <hkaiser> akheir: let me talk to big R first

20:51 <akheir> Sure.

20:52 <akheir> see pm plz

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