Minutes of the code management group meeting 2015-03-04
From UKCA
Present
Teleconference Numbers
- UK Freefone: 0800 917 1956
- Participant passcode: 51615813 then #
Agenda
- Minutes of the last meeing
- vn10.1
- GA7.0 update
- Rose on MONSooN
- Bugfixes
- Targets for vn10.2
- LFRic
- New supercomputer: Cray XC-40
- vn7.3 on MONSooN XC-40
- A.O.B./D.N.M.
- Date of next meeting
Minutes
Minutes of the last meeing
Actions carried forward from previous meetings
- (1) JM to check whether settings, branches in vn8.4 Release candidate are consistent with GA6/7 assessment job and also attempt tuning of SO2 scavenging parameters. In progress - liase with LA?
- (2) CJ to circulate plots of radical concentrations in stratosphere showing odd banded structure, including version with different photolysis scheme options. Ongoing. Done a while ago - nothing much has changed?
- (2.1) FOC to put on UKESM1 document
- (3) CJ to email LA re problems with SO2 diagnostics for emissions. Issues related to using ASAD diagnostics package. Ongoing - needs debugging.
- (3.1) CJ to put branch on PUMA email CMG location of branch to check details
- (4) GM check 8.4 versus 7.3 GLOMAP-mode code and report any bug fixes to Mohit. Ongoing. Still Ongoing (big task) - not just bugfixes, also functionality updates
Actions from the last meeting
- (1) UKCA Improvements for UKESM1
- (1.1): FOC to add in status and ticket numbers to each item
- (1.2) Dry-deposition, split into 2 options: 1) Quick and dirty fix (NS/FOC(?)); 2) Future proof (AH)
- (1.3) FOC to reorder by priority
- (1.4) FOC/NB/GM - discuss (9) offline
- (1.5) FOC to talk to Colin Jones about nitrate (high priority), with a offer to help Steve Rumbold
- (1.6) JM to make standing telecon from January to discuss this list. Discuss with Alistair Sellar
- (1.7) ALL - feed in to FOC list of priorities
- (2) vn9.2/GA7.0 update
- (2.1) JM to report back on progress at the next meeting
- (2.2) JM/GM to talk offline
- (3) Release jobs
- (3.1) LA to release RC6.2
- (4) Rose stem jobs
- (4.1) MD to do for 10.2 testing (needs updates to 10.1)
- (4.2) LA to talk to Ros Hatcher at NCAS-CMS about NCAS plans for Rose stem
- (5) Bug Reporting
- (5.1) Incorporate Bug #35 into dry deposition work (see above).
- (5.2) Bug #36 (ozone): FOC/Steven Hardiman to take on - see MOSRS ticket #102 (UKCA Bugfix for ozone column diagnostic calculation)
- (5.3) CMG to monitor list of bugs and circulate between group for owners
- (5.4) At CMG future meetings there should be included an appendix listing the open bugs. If a ticket is included it is not an open bug (as the owner of ticket is person doing lodging).
- (6) Shared repository
- (6.1) ALL to migrate tickets over
- (7) Date of next meeting
- (7.1) LA to set up doodle poll for next meeting for after the code freeze - late Feb/Early March.
vn10.1
- The agenda for the UM Project Board held on 2015-02-25 can be found here: https://code.metoffice.gov.uk/trac/um/wiki/ProjectDocumentation/10.x/PB_agenda_1
- Several tickets made it in to vn10.1 - see: UM Trac pages
- Ticket #102 (UKCA Bugfix for ozone column diagnostic calculation) didn't make it for vn10.1 and so has been bumped to vn10.2
- Ticket #197 has had some STASHmaster issues
- Ticket #203 had to have the science changes removed due to clashing with KGO at a late stage. Ticket #341 has been opened to add these in.
GA7.0 update
Rose on MONSooN
Bugfixes
Targets for vn10.2
- Ticket keywords - please include UKCA and SCO138
- Current vn10.2 tickets
LFRic
- Overview document on implications of GungHo! coupling for UKCA: GungHo_LFRic_UKCA_Jan2015.pdf
- Draft document outlining some possible options for organisation of the UKCA code for coupling to GungHo!/LFRic: UKCA–GungHo.pdf
New supercomputer: Cray XC-40
- Paul Cresswell has sent LA the following about Rose stem jobs on XC-40:
All the vn10.1 tests on the IBM are also available on the Cray, including Mohit's new tests, although many of them have issues - some of them are segfaulting, some have issues writing the dumps in a reasonable time (this can sometimes be fixed with the right environment variables to tweak the MPI behaviour), some of them run to completion but are not bit-comparable between runs. Mohit's new tests are in the first category. The hadgem_nd_ukca test is the only one which hits the particular error fixed by #346, so everything else must not be executing this particular piece of code (or crashing out sooner). The aqum_nd test is one of the few that seems to behave and be reproducible. Much of the UM 10.2 dev cycle will be spent fixing the others! The aqum_nd_comp_check (compiler checking) job also works, producing lots of warning messages that will be helpful in the future. Please note that no XC40 tests are available in the standard collective groups (e.g. developer, ukca), as not everyone has access to the machine yet - it would not do to have rose-stem suites failing for users who do not have accounts set up. The Cray tests are all available individually by replacing "metohpc" with "meto_xc40" in the group name. [The porting of Rose stem tests are] a joint effort - the UM System and HPC Optimisation teams are both working on it to varying degrees, but there's a lot needs doing, so if a developer/code owner/test owner wants to prioritise fixing their own job and get the fixes to us, we'll gladly accept the help. Some things will be down to the technical teams though - for example if lots of jobs are not bit comparing then that's probably an issue with the compiler settings/optimisation env vars and not something we'd expect a developer would want to focus on.