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/ | GSoC2018: https://wp.me/p4pxJf-k1
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<zao> I wonder if nik ever read my message about tls callbacks, no acknowledge
<zao> Guess I should not have bothered.
<hkaiser> what nik?
<zao> Unj
<zao> Can’t complete their nickname as they have quit in the meantime.
<hkaiser> k
<hkaiser> I'd poke him again, he was around earlier
<zao> Guess they don’t read mentions when they’ve been logged into irc
<zao> I’m out travelling anyway, just felt I had a lead they might want to look into, even if it was for a negative result.
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<hkaiser> zao: I'll give him a headsup
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<github> [hpx] StellarBot pushed 1 new commit to gh-pages: https://git.io/vhWj6
<github> hpx/gh-pages a164f08 StellarBot: Updating docs
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<hkaiser> jbjnr_: yt?
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<diehlpk> hkaiser, Is the storm project still active?
<diehlpk> We were thinking to interview HPX and Storm as the application using HPX
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<jakub_golinowski> M-ms, yt?
<hkaiser> diehlpk: yah, storm is still ongoing
<M-ms> jakub_golinowski: yep, here
<jakub_golinowski> M-ms, you were right, in some places opencv is splitting the range. This was the case in the hpx_load_image example where image is converted to grey_scale.
<jakub_golinowski> the split is decided by the float nstripes
<jakub_golinowski> For now I am not sure why this is the case so I just ignore the split introduced by opencv and access the wholeRange (which is stored in context object) and with such a backe hpx_load_image is working properly wihtout any changes for both sequeantial, TBB and HPX
<jakub_golinowski> I have committed the new version of opencv to my fork of opencv
<M-ms> Ok, nice
<M-ms> But what does that mean in terms of parallelism?
<jakub_golinowski> Just want to make sure: the call is tomorrow at 4pm Zurich time?
<M-ms> Thanks, I'll try it out tomorrow (my own laptop decided to give up, back at work tomorrow)
<M-ms> Yep, I'm flexible though, preferably within normal working hours
<M-ms> Especially as Patrick is not joining
<diehlpk> M-ms, jakub_golinowski In two weeks I am back from my leave and we can try to find a new time
<jakub_golinowski> M-ms, 4pm would be good, I have a private room booked in the library for that time tomorrow so it should be quiet
<M-ms> Did you have a look at what kind of ranges you get for each (sub) for loop (so what's e.g. in the lambda in the mandelbrot example)? Do you get some kind of chunking with the tbb backend? And does for the hpx backend there is basically no chunking (at the moment)?
<M-ms> Good, let's stick with 4 pm then
<M-ms> diehlpk: ok, no problem
<jakub_golinowski> M-ms, so for now I was looking at the ranges for the hpx_load_image example. The log of my findings is here: https://docs.google.com/document/d/1VtI8jfzx92YiRW-o_D-_S9oNqvpw2I8udsyQyaGTFEc/edit#
<M-ms> Thanks, that looks good
<M-ms> I also think now would be a good time to ask on the opencv channel about that nstripes parameter as it seems to be quite fundamental to how the backends are used
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<jakub_golinowski> M-ms, I agree - I will compose a message to opencv today
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<M-ms> jakub_golinowski: perfect (please ping me as well over on the opencv channel)
<jakub_golinowski> ok
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<jakub_golinowski> M-ms, yt?
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<M-ms> jakub_golinowski: here now
<jakub_golinowski> I wrote down the message to opencv
<jakub_golinowski> M-ms, I added you to gdoc
<M-ms> jakub_golinowski: looks good in general, but where were you planning on sending that? I got the impression there was no (active) mailing list
<jakub_golinowski> M-ms, this is what I wanted to consult with you
<jakub_golinowski> I can just copy paste it to the irc but am not sure if this is a good idea
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<M-ms> Hmm, no, I would try to keep it a bit shorter. There might not even be someone online at the moment who can help. So I would say introduce yourself shortly and ask one question at a time, see if someone has an answer. Then you might want to open a WIP pull request to get early feedback from the opencv side (easier for them to review that way).
<jakub_golinowski> ok
<jakub_golinowski> what is WIP pull request?
<M-ms> Ah, WIP is work in progress
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<M-ms> Just used to mark that it's not ready to be merged but still keeping it visible for others to see the progress
<jakub_golinowski> ok
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<parsa> hkaiser: microsoft's acquired github… is that how things are supposed to work?
<K-ballo> hah, so that's what people were talking about gitlab
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<hkaiser> parsa: github or gitlab?
<parsa> github
<hkaiser> ok
<hkaiser> let's see how that pans out ...