egg|nomz|egg changed the topic of #kspacademia to: https://gist.github.com/pdn4kd/164b9b85435d87afbec0c3a7e69d3e6d | Dogs are cats. Spiders are cat interferometers. | Космизм сегодня! | Document well, for tomorrow you may get mauled by a ネコバス. | <UmbralRaptor> egg|nomz|egg: generally if your eyes are dewing over, that's not the weather. | <ferram4> I shall beat my problems to death with an engineer.
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<Qboid>
4d 0h 0m 0s left to event #30: [at 2018-10-19 01:45:00]. Say '!kountdown 30' for details
* UmbralRaptop
spins around Snoozee
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<egg|cell|egg>
!wpn
* Qboid
gives egg|cell|egg a nilpotent thermionic జ్ఞా
* egg|cell|egg
stabs bofh with the nilpotent thermionic జ్ఞా
<egg|work|egg>
!wpn
* Qboid
gives egg|work|egg a quartz midden with a gegenschein attachment
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<egg|work|egg>
!u Ñ
<Qboid>
U+00D1 LATIN CAPITAL LETTER N WITH TILDE (Ñ)
<egg|work|egg>
whitequark: ËÏÄÉÒÏ×ËÉ
<egg|work|egg>
;8ball did bofh^28 get eaten by a lamp *again*
<kmath>
egg|work|egg: My sources say no
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<egg|work|egg>
!u ñ
<Qboid>
U+00F1 LATIN SMALL LETTER N WITH TILDE (ñ)
<kmath>
<haya2e_jaxa> [TD1-R1-A] As if refusing to let us land, Ryugu's surface is covered with boulders. To reach this unexplored place,… https://t.co/EvPReocxWj
<kmath>
<jeff_foust> Kluger: was the shuttle program a mistake? ⏎ Valerie Neal: no, it was really a return to “Plan A” prior to Apollo to… https://t.co/65IVKsUzjZ
<SnoopJeDi>
pretty sure the Shuttle is not what Von Braun et al. had in mind, although the ISS might count.
<egg>
UmbralRaptor: cats!
<awang>
egg: That macOS bug doesn't sound fun
<egg>
well, the mutexes are fair
<awang>
It'd certainly explain why I had so-so performance when I compiled with shared_mutex before you officially dropped El Capitan support
<egg>
fair is foul
<awang>
egg: Do you know if this is still an issue for 10.14?
<egg>
awang: sure, they're not going to break their thread model for us
<egg>
they went with fair mutexes, you get fair mutexes
<egg>
they can't change that without breaking things that rely on the mutexes being fair
<egg>
so we need our own mutex (probably the absl one)
<awang>
egg: Is the fairness/futex/etc. stuff not considered an implementation detail?
<UmbralRaptor>
SnoopJeDi: I do worry that the nature of the shuttle's failure is not appreciated. (outside *maybe* of crew safety)
<awang>
Or is it low-level enough that that kind of implementation detail matters?
<egg>
awang: sure it's an implementation detail in the sense that the C++ standard doesn't mandate anything
<awang>
Never mind, didn't read more >_<
<SnoopJeDi>
UmbralRaptor, I think the air force's role alone would spoil the idea of it being a LEO infrastructure project as envisioned by the pre-Apollo crowd
<SnoopJeDi>
at least partially
<egg>
awang: but if microsoft changed its mutex to a slow fair one everything would break down because things assume the mutex is fast, and conversely with apple's
<awang>
egg: Fair enough
* egg
meows at bofh^28
<awang>
egg: Seems there may be a way to make macOS mutexes non-fair?
<awang>
"What’s more, the developers of OS X have recognized this and added a way to make their mutexes non-fair. In <pthread_spis.h>, there’s a OS X-only function, pthread_mutexattr_setpolicy_np. (pthread mutex attributes control various qualities of pthread mutexes: normal, recursively acquirable, etc. This particular function, supported since OS X 10.7, enables setting the fairness policy of mutexes
<awang>
to either _PTHREAD_MUTEX_POLICY_FAIRSHARE (the default) or _PTHREAD_MUTEX_POLICY_FIRSTFIT."
<awang>
egg: Also, is "ComsumeCpuExclusiveLock" intentional in #1962?
<Qboid>
[#1962] title: A benchmark for ThreadPool | To try to figure what's happening in #1955. On Windows and Linux the results are what we expect, on macOS not so much.... | https://github.com/mockingbirdnest/principia/issues/1962
<awang>
It's consistent, but I would have expected "Consume"
<egg>
welp
<egg>
seems i'm bad at reviewing
<awang>
:P
* UmbralRaptor
stares at WFIRST target stars.
* UmbralRaptor
questions the team's choices.
<UmbralRaptor>
Anyway, have fun doing RV follow-up in a system with 4 stars, one of which is a white dwarf, and another is a B7V with a vsini of 320 km/s.
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