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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<nikunj97> hkaiser, which parcelport implementation is faster amongst TCP and MPI?
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<hkaiser> depends
<nikunj97> on?
<nikunj97> also how do I run a TCP parcelport on system without slurm?
<hkaiser> nikunj97: there is a stackoverflow question on that, also, there is an active PR for hpxrun.py that adds support for multi-node tcp runs
<nikunj97> so the only way right now to run tcp parcelport is with srun?
<nikunj97> just checked the stackoverflow question. Got my answer
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<Amy1> how to debug openmp program? For example, xx = bb; I use print("xx = %d bb = %d\n",xx,bb); and the two value is the same. But when I insert a breakpoint after the "xx=bb" using gdb, the two value is not the same.
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<nikunj97> what is the difference between hpx::naming::id_type and hpx::id_type?
<nikunj97> binpacking_distribution_policy operator() takes vector<hpx::id_type> as argument and hpx::components::binpacking_distribution_policy(hpx::find_all_localities()) throws an error from compiler end
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<Ameetk> AnyOne !!Paysend XDR token : How it is getting price value of 5 different native coins ?
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<hkaiser> ms[m]: I think this is caused by the latest runtime mode changes: https://cdash.cscs.ch//viewTest.php?onlyfailed&buildid=110761
<hkaiser> also everybody: PMC meeting this morning at 9am CDT: https://lsu.zoom.us/j/335605227
<hkaiser> ms[m], gdaiss[m]: feel free to use this link for the Kokkos discussion before the PMC meeting
<ms[m]> hkaiser: oh yes, certainly
<ms[m]> well spotted!
<ms[m]> kokkos meeting will be tomorrow, gdaiss is off enjoying a day off
<hkaiser> slacker
<hkaiser> when tomorrow?
<ms[m]> totally
<hkaiser> ms[m]: at what time do you meet tomorrow for Kokkos ? can I join?
<ms[m]> yeah, of course
<ms[m]> same time as it would've been today
<hkaiser> ok, thanks - I have a meeting at the hour, so will have to leave earlier
<ms[m]> ah, well, I'm pretty sure we can move it a bit as well
<ms[m]> if you're up early anyway we can ping you a bit earlier and start when you're free
<hkaiser> ms[m]: yah, I should be around earlier
<heller1> hkaiser: ms: I'm off as well
<hkaiser> k
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<Nikunj__> hkaiser, are you available for a call sometime this week/weekend? I Have some questions regarding implementation for distributed portions.
<Nikunj__> also what is the difference between hpx::id_type and hpx::naming::id_type?
<hkaiser> Nikunj__: yes, weekend should be fine
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<nikunj97> binpacking_distribution_policy operator() takes vector<hpx::id_type> as argument and hpx::components::binpacking_distribution_policy(hpx::find_all_localities()) throws an error from compiler end
<hkaiser> no difference the second is a using for the first
<nikunj97> iirc hpx::find_all_localities return vector<hpx::naming::id_type>
<nikunj97> hkaiser, this is what I'm using: hpx::future<int> exec = hpx::async<foo_action>(hpx::components::binpacking_distribution_policy(hpx::find_all_localities()), 25);
<nikunj97> am I getting something wrong here?
<hkaiser> nikunj97: does it work?
<nikunj97> no, it throws a compiler error
<hkaiser> I'd start with a simpler policy, however
<nikunj97> this is what the compiler throws: no matching function for call to ‘hpx::components::binpacking_distribution_policy::binpacking_distribution_policy(std::vector<hpx::naming::id_type>)
<hkaiser> give me a sec, I'm in a meeting
<nikunj97> sure
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<hkaiser> nikunj97: you're supposed to use the binpacked (static) instance: binpacked(localities, "<counter_name>")
<hkaiser> look at the operator()() it exposes
<hkaiser> i.e. async(action(), binpacked(...), ...)
<nikunj97> hkaiser, isn't that the same as one I'm using?
<nikunj97> counter name has a default argument
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<hkaiser> nikunj97: ok, forgot that
<nikunj97> for distributed resiliency, I believe binpacking is what we're looking for. It allows to execute on a number of localities.
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<nikunj97> As opposed to the other 2 since they operate on a single id, provided as an argument.
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<hkaiser> well, the default policy does a round robin on the list of localities it's initialized with
<hkaiser> nikunj97: also, pls see pm
<hkaiser> nikunj97: fwiw, there is a test using binpacked: https://github.com/STEllAR-GROUP/hpx/blob/master/tests/unit/component/new_binpacking.cpp
<nikunj97> how is mine different than this? :/
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<hkaiser> bita_: yt?
<bita_> yes
<hkaiser> I could meet now
<bita_> I will join in a sec
<hkaiser> thanks
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<K-ballo> I can't believe rxjava2 doesn't have a `then` operator :/
<weilewei> make a PR then :)
<K-ballo> for java? no way
<K-ballo> .flatMap seems to be the go-to
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