Meeting Notes.
Thanks to Staffan Tjernstrom for chairing the meeting.
Attendance:
Paul M. Bendixen

Patrice Roy
CA-Michael Wong (CA)
michael wong(ca)
Stanley Lam
Haines# Derek
Jeff Smith (Jeff)
Tjernstrom# Staffan
Sophia Poirier
René Ferdinand Rivera Morell
damon
Charles Bay
Andrew Lumsdaine
Viktor Zhou
Ronen Friedman
John McFarlane
Felix Schmoll
Antony Peacock
Matheus Izvekov
Inbal Levi


























Charles Bay

On Tue, Jul 13, 2021 at 12:09 PM Michael Wong <fraggamuffin@gmail.com> wrote:

Topic: SG14 Low Latency Monthly

This meeting is focused on Finance .

Hi,

Michael Wong is inviting you to a scheduled Zoom meeting.

Topic: SG14 monthly
Time: 2nd Wednesdays 02:00 PM Eastern Time 1800 UTC (US and Canada)
    Every month on the Second Wed,

    June 9, 2021 02:00 PM 1800 UTC

Join from PC, Mac, Linux, iOS or Android:
https://iso.zoom.us/j/93151864365?pwd=aDhOcDNWd2NWdTJuT1loeXpKbTcydz09
    Password: 789626

Or iPhone one-tap :
    US: +12532158782,,93151864365# or +13017158592,,93151864365#
Or Telephone:
    Dial(for higher quality, dial a number based on your current location):
        US: +1 253 215 8782 or +1 301 715 8592 or +1 312 626 6799 or +1
346 248 7799 or +1 408 638 0968 or +1 646 876 9923 or +1 669 900 6833
 or 877 853 5247 (Toll Free)
    Meeting ID: 931 5186 4365
    Password: 789626
    International numbers available: https://iso.zoom.us/u/abRrVivZoD

Or Skype for Business (Lync):
    https://iso.zoom.us/skype/93151864365

Agenda:

1. Opening and introduction

ISO Code of Conduct
<
https://isotc.iso.org/livelink/livelink?func=ll&objId=20882226&objAction=Open&nexturl=%2Flivelink%2Flivelink%3Ffunc%3Dll%26objId%3D20158641%26objAction%3Dbrowse%26viewType%3D1
>

ISO patent policy.
https://isotc.iso.org/livelink/livelink/fetch/2000/2122/3770791/Common_Policy.htm?nodeid=6344764&vernum=-2

WG21 Code of COnduct:

https://isocpp.org/std/standing-documents/sd-4-wg21-practices-and-procedures

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 issues (125 min)

2.1 General logistics

Future meeting plans

    

    July 14, 2021 02:00 PM ET/1800 UTC: Finance/Low Latency

    Aug 11, 2021 02:00 PM ET/1800 UTC: Games

2.2 Paper reviews

Discussion about Finance topics:

https://lists.isocpp.org/sg14/2021/06/0636.php

https://lists.isocpp.org/sg14/2021/07/0642.php


P2388r0 John M
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2021/p2388r0.html
Abort-only contract
people who want contracts to continue to do diagnostic work in production code: logging contract violation and continue execution

what to do after contract violation: continue or abort?
low-latency concerns: tolerating bugs at runtime and get sensible behaviour while balancing performance needs

embedded side: this is another way to handle exceptional exceptions, microcontroller running at kilohertz does not like a lot of checks
This view is not well represented

Finance prefers to maintain zero overhead principle

Like Andre's direction: like writing code that behaves as if all the conditions will be met. Games like to see contracts progressing but dont want any overhead

The abort need to be worded carefully and is a way to trigger early termination other the ncallign through noexcept

Can we name our own contract handler? its a separate paper

SG14 sees the ability of the optimizer to see through contract conditions and assertions for optimization purposes is a valuable functionality

SG14 supports the direction as taken in P2388R0
2/10/0/0/0

SG14 encourages SG21 to enable the assumption that contract violations as in P2388r0 are potential optimization opportunities.
6/4/0/0/0


https://lists.isocpporg/sg14/att-0647/eager-tls-init.html
Jeff Smith




2.2.1 any other proposal for reviews?

Deterministic Exception for Embedded by James Renwick
https://www.pure.ed.ac.uk/ws/portalfiles/portal/78829292/low_cost_deterministic_C_exceptions_for_embedded_systems.pdf

Freestanding?

SG14/SG19 features/issues/defects:

https://docs.google.com/spreadsheets/d/1JnUJBO72QVURttkKr7gn0_WjP--P0vAne8JBfzbRiy0/edit#gid=0

2.3 Domain-specific discussions

2.3.1 SIG chairs

   - Embedded Programming chairs: Ben Craig, Wouter van Ooijen and Odin
   Holmes, John McFarlane

   - Financial/Trading chairs: Staffan
Tjernström, 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

-

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

    July 14, 2021 02:00 PM ET/1800 UTC: Finance/Low Latency

    Aug 11, 2021 02:00 PM ET/1800 UTC: Games

Kind Rgds