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Subject: Re: June 11 SG14 6 UTC Inverted meeting (Games)
From: Paul M. Bendixen (paulbendixen_at_[hidden])
Date: 2020-06-16 17:01:44


There is no news saying meetingC++20 is going to be online, this is still
an ongoing issue.
http://meetingcpp.com/meetingcpp/news/items/A-first-look-at-COVID-19-and-Meeting-Cpp-2020.html
However, perhaps it won't be a big F2F if it happens.
/Paul

Den tir. 16. jun. 2020 kl. 19.00 skrev Michael Wong via SG14 <
sg14_at_[hidden]>:

> Thanks Matthew for the linnks. Here are the minutes from June SG14 call.
> Thanks also to Matthew for the minutes:
>
> No objections to previous minutes
> No action items from prev meeting
>
> Cppcon:
> will go ahead, online/offline ratio undecided
> sg14 face to face cppcon will not happen, will have regular online
> meetup instead
> submissions still (sort of) open
> reviewers for papers for embedded track appreciated
>
> Future CPP standard meetings:
> ISO & Insights have put face-to-face meetings on hold for moment
> Currently moratorium on forwarding papers on, but may not continue due
> to length of covid lockdowns
>
>
> Papers:
>
> Colony:
> Wording is progressing with help from Jens
> Question around having reserve function - whether necessary:
> - not present in deque
> - performance detriment when present in previous benchmarks (for full
> reserve implementation)
> - question whether necessary regarding shifting allocation out of hot
> loop code - suggestion that this is solved to an extent via allocators
> when this is necessary
> - also question around whether is necessary to stop colony from
> allocating lots of small memory blocks when the rough number of total
> elements is known in advance - suggestion that this is solved by
> adjusting minimum block capacities
> - suggestion that we can always add this later in standardization process
> - inclusion may force necessity of another function to free up unused
> memory blocks - as opposed to shrink_to_fit, which is not required to
> keep iterators to elements valid
> - retaining memory blocks where all elements have been erased - could
> be problematic in terms of creating uncertainty for developers as to
> whether a memory block is freed
> - question for later paper revision - should shrink_to_fit consolidate
> container and remove skips, or reallocate elements to maximum capacity
> blocks and create best-case cache locality
>
>
> Question around supplying min/max block capacity limits to
> constructors/functions - whether invalid (out-of-range) supplied
> limits should be silently corrected, or if functions should
> throw/return an error code/some combination of these:
> - Constructors can throw anyway, so throwing or defining as UB most logical
> - Settle for throwing as more straightforward
> - Is skipfield necessary - seems to be for any future implementation
> - Nathaniel Niel's suggestion of alternative index - unclear as to
> what implementation would be - may get back to Matt later
>
>
> Affinity:
> New paper, 2155, following on from 1436
> Summary of changes
> Overview:
> - p1436 -executor-centric with hints - required knowledge of
> abstraction of executor
> - Switch to algorithmic-centric properties - describes what freedoms
> implementation has, semantics of algorithm
> - Can be applied more generically to more executors
> - Executor properties + execution policy properties
> - Algorithm can execute what user is requesting based on executor's
> hardware abstraction
> - Definition of 'locality interference' - metric
>
> Jens wording critique:
> - should contain editorial instruction that this should apply on top of
> p0443
> - virtual machines/GPU's/explicit hardware descriptions do not fit
> within C++ abstract machine, should be moved to proposal
> - 'bulk algorithm' concept/word is not existing word in C++ standard,
> needs explicit explanation if used
> - 'must' too ambiguous, use 'shall'. 'should' similarly cannot be used
> - only italicize terms when defining them, not elsewhere
> - 'higher constructive interference' not defined, 'hardware
> constructive interference' is
> - changes/additions to abstract machine potentially affects ability of
> compiler to optimize
> - work items needs explaining
>
>
> CPP deterministic exception group: nothing
> Embedded: Nothing to report
> Financial: nobody present
> Games: Linear algebra reviewing next week in LEWG online, BLAS &
> operator overload, 1500 UTC monday
> Kona is next CPP standards meeting in line
>
> Paul: Is there a face-to-face SG14 in november for MeetingCPP? Unlikely as
> it will be virtual but may be the next Israel F2F meeting.
>
> Agenda
> item for next meeting.
>
> On Wed, Jun 10, 2020 at 6:08 PM Matthew Bentley via SG14 <
> sg14_at_[hidden]> wrote:
>
>> Hi Michael,
>> just to update the current proposal for colony is at:
>>
>> https://htmlpreview.github.io/?https://github.com/WG21-SG14/SG14/blob/master/Docs/Proposals/D0447R11%20-%20Introduction%20of%20colony%20to%20the%20Standard%20Library.html
>>
>> Still going through some revisions before re-submitting at the moment.
>>
>>
>> On Thu, 11 Jun 2020 at 07:30, Michael Wong via SG14 <
>> sg14_at_[hidden]> wrote:
>>
>>> Updated slides affinity:
>>>
>>> https://docs.google.com/presentation/d/1V_69toBb1mF1a_8cRH3G_TkE1EOekW95Jz0LB4o_lTc/edit#slide=id.p4
>>>
>>> On Tue, Jun 9, 2020 at 10:14 PM Michael Wong <fraggamuffin_at_[hidden]>
>>> wrote:
>>>
>>>> Topic: SG14 Low Latency Monthly.
>>>>
>>>> This meeting is Games focused and is chaired by Guy Davidson.
>>>>
>>>> Hi,
>>>>
>>>> Michael Wong is inviting you to a scheduled Zoom meeting.
>>>>
>>>> Topic: SG14 monthly Apr 2020-Oct 2020
>>>>
>>>> Time: Jun 11, 2020 02:00 AM Eastern Time (US and Canada) 6 UTC
>>>> Jun 11, 2020 02:00 AM 6UTC
>>>> Jul 8, 2020 02:00 PM 18 UTC
>>>> Aug 12, 2020 02:00 PM 18 UTC
>>>> Sep 9, 2020 02:00 PM 18 UTC
>>>> Oct 7, 2020 02:00 PM 18 UTC
>>>>
>>>> Join from PC, Mac, Linux, iOS or Android:
>>>> https://iso.zoom.us/j/819108882?pwd=L0pPZm5QRWlTYXdJditvU1JLdjFYUT09
>>>> Password: 013549
>>>>
>>>> Or iPhone one-tap :
>>>> US: +13462487799,,819108882# or +14086380968,,819108882#
>>>> Or Telephone:
>>>> Dial(for higher quality, dial a number based on your current
>>>> location):
>>>> US: +1 346 248 7799 or +1 408 638 0968 or +1 646 876 9923 or +1
>>>> 669 900 6833 or +1 253 215 8782 or +1 301 715 8592 or +1 312 626 6799
>>>> or 877 853 5247 (Toll Free)
>>>> Meeting ID: 819 108 882
>>>> Password: 013549
>>>> International numbers available: https://iso.zoom.us/u/abhaIjFKLZ
>>>>
>>>> Or Skype for Business (Lync):
>>>> https://iso.zoom.us/skype/819108882
>>>>
>>>> Agenda:
>>>>
>>>> 1. Opening and introductions
>>>>
>>>> 1.1 Roll call of participants
>>>>
>>>> 1.2 Adopt agenda
>>>>
>>>> 1.3 Approve minutes from previous meeting, and approve publishing
>>>> previously approved minutes to ISOCPP.org
>>>>
>>>> 1.4 Action items from previous meetings
>>>>
>>>> 2. Main issue
>>>>
>>>> s (125 min)
>>>>
>>>> 2.1 General logistics
>>>> CPPCON logistics
>>>> CPPCON SG14 plans
>>>> CPPCON Embedded Track: Ben Saks
>>>> future C++ Standard meetings:
>>>>
>>>> 2.2 Paper reviews
>>>>
>>>> 1. Colony by Matthew Bentley,
>>>> Colony Matthew Bentley https://wg21.link/P0447
>>>>
>>>> 2. Affinity by Gordon Brown al:
>>>>
>>>> Affinity Gordon Brown, Ruyman Reyes, Michael Wong, Mark Hoemmen, Jeff
>>>> Hammond, Tom Scogland, Domagoj Šarić https://wg21.link/p1436
>>>>
>>>> 2.2.1 any other proposal for reviews?
>>>>
>>>> Discuss future direction of detreministic C++ exception group :
>>>>
>>>> Low-cost Deterministic C++ Exceptions for Embedded Systems
>>>> <
>>>>
>>>> https://www.research.ed.ac.uk/portal/files/78829292/low_cost_deterministic_C_exceptions_for_embedded_systems.pdf>
>>>>
>>>>
>>>> Low-cost
>>>> Deterministic C++ Exceptions for Embedded Systems James Renwick James
>>>> Renwick et al.
>>>>
>>>> 2.3 Domain-specific discussions
>>>>
>>>> 2.3.1 SIG chairs
>>>>
>>>> - Embedded Programming chairs: Ben Craig, Wouter van Ooijen and Odin
>>>> Holmes, John McFarlane
>>>> <
>>>>
>>>> http://wiki.edg.com/bin/edit/Wg21belfast/McFarlane?topicparent=Wg21belfast.SG14CPPCON2019-09-17;nowysiwyg=1>
>>>>
>>>>
>>>> - Financial/Trading chairs: Stephan TJ, Carl Cooke, Neal Horlock,
>>>> Mateusz Pusz, Clay Trychta,
>>>> - Games chairs: Rene Riviera, Guy Davidson and Paul Hampson
>>>> - Linear Algebra chairs: Bob Steagall, Mark Hoemmen, Guy Davidson
>>>>
>>>>
>>>> 2.4 Other Papers and proposals
>>>>
>>>> 2.5 Future F2F meetings:
>>>>
>>>> 2.6 future C++ Standard meetings:
>>>> https://isocpp.org/std/meetings-and-participation/upcoming-meetings
>>>>
>>>> - 2020-11: (New York, tentative) Cancelled.
>>>> - 2021-02-22 to 27: Kona, HI, USA
>>>>
>>>> 3. Any other business
>>>> Reflector
>>>> https://lists.isocpp.org/mailman/listinfo.cgi/sg14
>>>> As well as look through papers marked "SG14" in recent standards
>>>> committee
>>>> paper mailings:
>>>> http://open-std.org/jtc1/sc22/wg21/docs/papers/2015/
>>>> http://open-std.org/jtc1/sc22/wg21/docs/papers/2016/
>>>>
>>>> Code and proposal Staging area
>>>> https://github.com/WG21-SG14/SG14
>>>> 4. Review
>>>>
>>>> 4.1 Review and approve resolutions and issues [e.g., changes to SG's
>>>> working draft]
>>>>
>>>> 4.2 Review action items (5 min)
>>>>
>>>> 5. Closing process
>>>>
>>>> 5.1 Establish next agenda
>>>>
>>>> 5.2 Future meeting
>>>>
>>>>
>>>> Time: Jul 8, 2020 02:00 PM Eastern Time (US and Canada) : Embedded: Ben
>>>> Craig
>>>>
>>>> Time: Aug 12, 2020 02:00 PM Eastern Time (US and Canada) : Fiinance:
>>>> Jens,
>>>> Stephan
>>>>
>>>> Time: Sep 9, 2020 02:00 PM Eastern Time (US and Canada) : Security:
>>>> Mathew
>>>> Butler
>>>>
>>>> Time: Oct 14, 2020 02:00 PM Eastern Time (US and Canada): Games: Rene
>>>>
>>> _______________________________________________
>>> SG14 mailing list
>>> SG14_at_[hidden]
>>> https://lists.isocpp.org/mailman/listinfo.cgi/sg14
>>>
>> _______________________________________________
>> SG14 mailing list
>> SG14_at_[hidden]
>> https://lists.isocpp.org/mailman/listinfo.cgi/sg14
>>
> _______________________________________________
> SG14 mailing list
> SG14_at_[hidden]
> https://lists.isocpp.org/mailman/listinfo.cgi/sg14
>

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