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/
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<nikunj97>
hkaiser, see pm please
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<heller_>
simbergm: you know what's pretty cool as well?
<heller_>
we get the cpu mask for the memory location and check if it has the bit set for the current cpu
<heller_>
now, it could be a benign assert, since the task might have been migrated
<heller_>
if I am not completely mistaken
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<heller_>
hm, no... this should not happen with that example as cross numa stealing has been turned of...
<jbjnr_>
heller_: for our cholesky stuff we have a numa allocator that is different from the one in hpx at the moment. I am in the process of overhauling it and writing a test for it. I could upgrade the transpose test to use ours (and use RP etc) and possibly fix a problem?
<heller_>
possibly ;)
<jbjnr_>
is it an actual hwloc problem you've got?
<heller_>
not sure if it is hwloc related or coming from us
<jbjnr_>
it's amd specific though?
<zao>
I don't get those kinds of topology problems on my single-socket Ryzen at home.
<heller_>
this is a single socket socket AMD EPYC 7401P
<mdiers_>
heller_: added some text output, graphic from lstopo is also visible
<heller_>
zao: there's something in the changelog, IIRC
<heller_>
mdiers_: which kernel do you use?
<mdiers_>
heller_: openSUSE Leap 15.0 with 4.19.8-2.gf931328-default
<heller_>
there you go
<heller_>
"There was a bug regarding L3 caches on 24-core Epyc processors which has been fixed in 4.14 and backported
<heller_>
in 4.13.x (and maybe in distro kernels too)."
<zao>
terminate called after throwing an instance of 'hpx::detail::exception_with_info<hpx::exception>'
<zao>
what(): the upper limit given is larger than the number of existing resources: HPX(bad_parameter)
<zao>
This is odd.
<zao>
srun:ing that example with 4 HPX threads and 4 transpose threads, with a -c4 -n1 -N1 allocation.
<zao>
-c12 works.
<zao>
Oh well, time to resume work.
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<mdiers_>
heller_: interesting. We had many problems during the installation of the distro(s), some with the board, other with the epyc and some more with the vega.
<heller_>
ok
<heller_>
this is a cloud server ... I haven't actually set up anything except docker-machine to launch stuff ;)
<diehlpk>
Should we keep this, update it , or remove it from the wiki?
<diehlpk>
* Please provide your email address, home mailing address, and phone number. This is a requirement and provides for accountability on both your side and ours.
<diehlpk>
Why do we ask this for?
<diehlpk>
Do we really need this information for GSoC?
<diehlpk>
I would prefer to not ask for it.
<jbjnr_>
I don't think the known issues does any harm, assuming it is still a known issue
<jbjnr_>
regarding address details. Does google know who they are? if google are vetting students for applicability then I'm happy to not ask for it
<jbjnr_>
diehlpk: ^
<jbjnr_>
if gogle have cleared them as legit candidates, all's well, but I'd like to know name, insitution of study etc.
<jbjnr_>
it's a form of job application so I'm not sure why you are concerned.
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<zao>
Anti-discrimination of some sort?
<jbjnr_>
Maybe
<diehlpk>
jbjnr_, I am not sure why we need their home address
<diehlpk>
I think e-mail and phone number is sufficient or?
<jbjnr_>
remove the request if you like. I've never checked on them.
<diehlpk>
heller_, What is your opinion?
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<heller_>
diehlpk: I don't care much ;)
<heller_>
diehlpk: I never used that information. And I wouldn't know what for in any case
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<devang_2401_>
hi I'm Devang.
<heller_>
Hi Devang
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<devang_2401_>
i am a gsoc aspirant. i wanted to work on some beginner level project to work on.
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<devang_2401_>
i wanted to work on some beginner level projects*