b.e30_alpha07c_cesm3_v2.B1850C_LTso.ne30_t232_wgx3.227

Open

#186 opened on Oct 1, 2025 1 comment 0 reactions 0 assignees View on GitHub

Nobody has claimed this yet.

Assessment

Difficulty: 5/5
Estimated time: Over a week
Newbie friendliness: 25/100

Issue type: Bug
Clarity: Mostly clear
Activity status: Stale
Domain: hpc

Research direction

Compare this case with issues #174 and #172, identify the MOM6 tag used in #174, and preserve the other alpha07c_cesm component choices. Review the mentioned user_nl_cpl, user_nl_clm, user_nl_cam, and user_nl_cice settings before running the B1850C_LTso experiment. Done means determining whether the Lab Sea still freezes and recording the result.

Written by the indexing model from the issue text.

Description

❗ Important: Wave attenuation under sea ice is unintentionally activated in this simulation because of updates in WW3.

Purpose:

Check if replacing the MOM6 tag with that used in 198 #174, while keeping all other components from alpha07c_cesm, prevents the Lab Sea from freezing.

Description:

Same as 216 #172, but using the ocean tag used in 198 #174.

user_nl_cpl:
wav_coupling_to_cice = .true.
histaux_l2x1yrg = .true.

user_nl_clm:

! These are not in an alpha tag yet, but would be ideal to start running with
paramfile = '/glade/campaign/cesm/cesmdata/cseg/inputdata/lnd/clm2/paramdata/ctsm60_params_cal115_c250813.nc'
glcmec_downscale_longwave = .false.

! This should be default in alpha07b, but aren't used in 198 which is reverted to clm5.3 data
!fsurdat= '/glade/campaign/cesm/cesmdata/inputdata/lnd/clm2/initdata_esmf/ctsm5.4/ctsm5.4_5.3.068_PPEcal115f09_118_pSASU.clm2.r.0161-01-01-00000.nc'

snow_thermal_cond_lake_method = 'Sturm1997'

use_init_interp = .true.
reseed_dead_plants = .true.

finidat= '/glade/campaign/cesm/cesmdata/inputdata/lnd/clm2/initdata_esmf/ctsm5.4/ctsm5.4_5.3.068_PPEcal115_116_pSASU.clm2.r.0161-01-01-00000.nc'

user_nl_cam:

mfilt               =       0,       5,     20,      40,      12,      120,      1,   1
nhtfrq              =       0,     -24,    -24,      -3,       0,       -2,      0,  -8760
ndens               =       2,       2,      2,       2,       2,        1,      2,   1
interpolate_output  =  .true.,  .true., .true.,  .true., .false.,   .true.,     .true.
interpolate_nlat    =     192,     192,    192,     192,      192,     192,      192
interpolate_nlon    =     288,     288,    288,     288,      288,     288,      288

empty_htapes = .true.

fincl1 = 'ACTNI', 'ACTNL', 'ACTREI', 'ACTREL', 'AODDUST', 'AODDUSTdn','AODVIS', 'AODVISdn','BURDENBC', 
'BURDENDUST', 'BURDENPOM', 'BURDENSEASALT',
'BURDENSO4', 'BURDENSOA', 'CAPE', 'CCN3', 'CDNUMC', 'CH4', 'CLDHGH', 'CLDICE', 'CLDLIQ', 'CLDLOW', 
'CLDMED', 'CLDTOT', 'CLOUD', 'CMFMC_DP',
'CT_H2O', 'DCQ', 'DQCORE', 'DTCOND', 'DTCORE', 'DTV', 'EVAPPREC', 'EVAPSNOW', 'FCTI', 'FCTL', 'FICE', 'FLDS', 'FLNS', 'FLNSC', 'FLNT', 'FLNTC', 'FLUT',
'FREQZM', 'FSDS', 'FSDSC', 'FSNS', 'FSNSC', 'FSNT', 'FSNTC', 'FSNTOA', 'ICEFRAC', 'LANDFRAC', 'LHFLX', 'LWCF', 'MPDICE', 'MPDLIQ', 'MPDQ', 'MPDT',
'OCNFRAC', 'OMEGA', 'OMEGA500', 'PBLH', 'PHIS', 'PINT', 'PMID', 'PRECC', 'PRECL', 'PRECSC', 'PRECSL', 'PRECT', 'PS', 'PSL', 'PTEQ', 'PTTEND', 'Q',
'QFLX', 'QRL', 'QRS', 'QTGW', 'RCMTEND_CLUBB', 'RELHUM', 'RVMTEND_CLUBB', 'SHFLX', 'SOLIN', 'SST', 
'STEND_CLUBB', 'SWCF',
'T', 'TAUX', 'TAUY', 'TFIX', 'TGCLDIWP', 'TGCLDLWP', 'TMQ', 'TREFHT', 'TS', 'TTGW', 'U', 'U10', 
'UBOT', 'UTGWORO', 'UTGW_TOTAL',
'V', 'VBOT', 'VTGWORO', 'VTGW_TOTAL', 'WPRTP_CLUBB', 'WPTHLP_CLUBB', 'Z3', 'ZMDQ', 'ZMDT', 'N2O',
 'CO2','CFC11','CFC12',
'AODVISdn','CCN3', 'CDNUMC', 'H2O', 'NUMICE', 'NUMLIQ','OMEGA500',
 'AQSO4_H2O2','AQSO4_O3', 'bc_a1', 'bc_a4', 'dst_a1', 'dst_a2', 'dst_a3', 'ncl_a1',
'ncl_a1', 'ncl_a2', 'ncl_a3', 'pom_a1', 'pom_a4', 'so4_a1', 'so4_a2', 'so4_a3', 'soa_a2' ,
'soa_a1', 'num_a1', 'num_a2', 'num_a3', 'num_a4',
'bc_a1SFWET', 'bc_a4SFWET', 'dst_a1SFWET', 'dst_a2SFWET', 'dst_a3SFWET', 'ncl_a1SFWET',
'ncl_a2SFWET', 'ncl_a3SFWET', 'pom_a1SFWET', 'pom_a4SFWET', 'so4_a1SFWET', 'so4_a2SFWET', 'so4_a3SFWET', 'soa_a1SFWET',
'soa_a2SFWET', 'bc_c1SFWET', 'bc_c4SFWET', 'dst_c1SFWET', 'dst_c2SFWET', 'dst_c3SFWET', 'ncl_c1SFWET', 'ncl_c2SFWET',
'ncl_c3SFWET', 'pom_c1SFWET', 'pom_c4SFWET', 'so4_c1SFWET', 'so4_c2SFWET', 'so4_c3SFWET', 'soa_c1SFWET', 'soa_c2SFWET',
'bc_a1DDF', 'bc_a4DDF', 'dst_a1DDF', 'dst_a2DDF', 'dst_a3DDF', 'ncl_a1DDF', 'ncl_a2DDF', 'ncl_a3DDF',
'pom_a1DDF', 'pom_a4DDF', 'so4_a1DDF', 'so4_a2DDF', 'so4_a3DDF', 'soa_a1DDF', 'soa_a2DDF',
'so4_a1_CLXF', 'so4_a2_CLXF', 'SFbc_a4', 'SFpom_a4', 'SFso4_a1', 'SFso4_a2',
'so4_a1_sfgaex1', 'so4_a2_sfgaex1', 'so4_a3_sfgaex1', 'soa_a1_sfgaex1', 'soa_a2_sfgaex1',
'SFdst_a1','SFdst_a2', 'SFdst_a3', 'SFncl_a1', 'SFncl_a2', 'SFncl_a3',
'num_a2_sfnnuc1', 'SFSO2', 'OCN_FLUX_DMS', 'SAD_SULFC', 'SAD_TROP', 'SAD_AERO',
'AODVISstdn', 'REFF_AERO', 'so4_a1', 'so4_a2', 'SAD_AERO', 'PS', 'TROP_P', 'FSNTOAC',
'CME', 'CMEIOUT'

fincl3 = 'PRECT', 'PRECC', 'FLUT', 'U850', 'U200', 'V850', 'V200', 'OMEGA500', 'TS', 'SST', 'PSL', 'Z500'

fincl4 =  'PRECC','PRECL'

fincl5 = 'Uzm','Vzm','Wzm','THzm', 'VTHzm','WTHzm','UVzm','UWzm'
phys_grid_ctem_nfreq=-6
phys_grid_ctem_zm_nbas=120
phys_grid_ctem_za_nlat=90


solar_irrad_data_file= '/glade/campaign/cesm/development/cross-wg/inputdata/SolarForcingCMIP7piControl_c20250103.nc'

micro_mg_dcs= 600.D-6
cldfrc_dp1 =  0.05
clubb_c8 = 4.6

bnd_topo = "/glade/campaign/cgd/amp/pel/topo/cesm3/ne30pg3_gmted2010_modis_bedmachine_nc3000_Laplace0100_noleak_greendlndantarcsgh30fac2.50_20250708.nc"

ext_frc_specifier = 'bc_a4 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/bc_a4-em-AIR-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'num_a4 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/num_bc_a4-em-AIR-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'SO2 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/SO2-em-AIR-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'so4_a1 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/so4_a1_ene_vertical-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'num_a1 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/num_so4_a1_ene_vertical-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'num_a1 -> /glade/campaign/cesm/cesmdata/inputdata/atm/cam/chem/emis/historical_ne30pg3/emissions-cmip6_num_a1_so4_contvolcano_vertical_850-5000_ne30pg3_c20200125.nc',
         'num_a2 -> /glade/campaign/cesm/cesmdata/inputdata/atm/cam/chem/emis/historical_ne30pg3/emissions-cmip6_num_a2_so4_contvolcano_vertical_850-5000_ne30pg3_c20200125.nc',
         'so4_a1 -> /glade/campaign/cesm/cesmdata/inputdata/atm/cam/chem/emis/historical_ne30pg3/emissions-cmip6_so4_a1_contvolcano_vertical_850-5000_ne30pg3_c20200125.nc',
         'so4_a2 -> /glade/campaign/cesm/cesmdata/inputdata/atm/cam/chem/emis/historical_ne30pg3/emissions-cmip6_so4_a2_contvolcano_vertical_850-5000_ne30pg3_c20200125.nc',
         'SO2 -> /glade/campaign/cesm/cesmdata/inputdata/atm/cam/chem/emis/historical_ne30pg3/emissions-cmip6_SO2_contvolcano_vertical_850-5000_ne30pg3_c20200125.nc',

srf_emis_specifier = 'bc_a4 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/bc_a4-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'bc_a4 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/bc_a4_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'pom_a4 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/pom_a4-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'pom_a4 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/pom_a4_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'num_a4 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/num_bc_a4-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'num_a4 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/num_bc_a4_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'num_a4 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/num_pom_a4-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'num_a4 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/num_pom_a4_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'num_a1-> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/num_so4_a1_ag-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'num_a1-> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/num_so4_a1_ship_slv-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'num_a2-> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/num_so4_a2_res_trs-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'so4_a1-> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/so4_a1_ag_ship_slv-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'so4_a2-> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/so4_a2_res_trs-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'so4_a1-> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/SO4_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'num_a1-> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/num_SO4_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'SO2 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/SO2-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'SO2 -> /glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/SO2_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'SOAE -> 0.5954D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/ISOP_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'SOAE -> 2.5592D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/BENZENE_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'SOAE -> 2.5592D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/BENZENE-VOC-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18-supplemental_gn_175001-202312.nc',
         'SOAE -> 8.5371D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/IVOC_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'SOAE -> 8.5371D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/IVOC-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'SOAE -> 16.650D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/SVOC_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'SOAE -> 16.650D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/SVOC-em-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18_gn_175001-202312.nc',
         'SOAE -> 8.2367D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/TOLUENE_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'SOAE -> 8.2367D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/TOLUENE-VOC-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18-supplemental_gn_175001-202312.nc',
         'SOAE -> 6.5013D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/XYLENES_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc',
         'SOAE -> 6.5013D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/CEDS-CMIP-2025-04-18/XYLENES-VOC-anthro_input4MIPs_emissions_CMIP_CEDS-CMIP-2025-04-18-supplemental_gn_175001-202312.nc',
         'SOAE -> 5.1004D0*/glade/campaign/acom/MUSICA/emis/cmip7/ne30/DRES-CMIP-BB4CMIP7-2-0_smoothed/MTERP_smoothed_input4MIPs_emissions_CMIP_DRES-CMIP-BB4CMIP7-2-0_gn_175001-202112.nc'

user_nl_cice:

ice_ic = "/glade/derecho/scratch/gmarques/b.e30_alpha07c_cesm3_v2.B1850C_LTso.ne30_t232_wgx3.227/run/INPUT/g.e30_a07c_cesm.GJRAv4.TL319_t232_wgx3_hycom1_N75.2025.130.cice.r.0009-01-01-00000.nc"

user_nl_mom:

HREF_FOR_MLD = 10.0

INPUTDIR = "INPUT"

KPP%
KPP_CVt2 = 1.0
%KPP

MLE%
BODNER_MSTAR = 1.0
BODNER_NSTAR = 1.0
CR = 0.01
CR_FILE = "mle-cr-mask_20250627.nc"
%MLE

SMAGORINSKY_KH = True
SMAG_LAP_CONST = 0.15

AH = 1.0e+12
LEITH_BI_CONST = 90.0
LEITHY_CK = 0.0

DO_SKEB = True
SKEB_NPASS = 8
SKEB_USE_GM = True
SKEB_GM_COEF = 0.75
MEKE_GMCOEFF = 0.25
SKEB_USE_FRICT = False
SKEB_FRICT_COEF = 0.0

ALE_COORDINATE_CONFIG = "HYBRID:hybrid_75layer_zstar2.50m-2025-04-04.nc,sigma2,dz"
MAX_LAYER_THICKNESS_CONFIG = "FILE:dz_max.nc,dz"
MAXIMUM_INT_DEPTH_CONFIG = "FILE:lev.nc,Z"

THICKNESS_CONFIG = thickness_file
VELOCITY_CONFIG = file
TS_CONFIG = file

INIT_LAYERS_FROM_Z_FILE = False

THICKNESS_FILE = "g.e30_a07c_cesm.GJRAv4.TL319_t232_wgx3_hycom1_N75.2025.130.mom6.r.0009-01-01-00000.nc"
TS_FILE = "g.e30_a07c_cesm.GJRAv4.TL319_t232_wgx3_hycom1_N75.2025.130.mom6.r.0009-01-01-00000.nc"
VELOCITY_FILE = "g.e30_a07c_cesm.GJRAv4.TL319_t232_wgx3_hycom1_N75.2025.130.mom6.r.0009-01-01-00000.nc"

TEMP_IC_VAR = "Temp"
SALT_IC_VAR = "Salt"

RESTART_CHECKSUMS_REQUIRED = FALSE

Case directory:

Locally (if still available):
/glade/campaign/cesm/cesmdata/cseg/runs/cesm2_0/b.e30_alpha07c_cesm3_v2.B1850C_LTso.ne30_t232_wgx3.227
On github:
https://github.com/NCAR/cesm_dev/tree/b.e30_alpha07c_cesm3_v2.B1850C_LTso.ne30_t232_wgx3.227

Sandbox:

Locally (if still available): /glade/work/gmarques/cesm.sandboxes/cesm3_0_alpha07c_cesm3_v2/

Diagnostics:

Diags (if available):
https://webext.cgd.ucar.edu/BLT1850/b.e30_alpha07c_cesm3_v2.B1850C_LTso.ne30_t232_wgx3.227/

Output:

Raw output on derecho (if still available): /glade/derecho/scratch/gmarques/archive/b.e30_alpha07c_cesm3_v2.B1850C_LTso.ne30_t232_wgx3.227/
CAM Climos: /glade/campaign/cgd/amp/amwg/climo/b.e30_alpha07c_cesm3_v2.B1850C_LTso.ne30_t232_wgx3.227

Contacts:
@cecilehannay @dlawrenncar @adamrher @PeterHjortLauritzen @JulioTBacmeister @swrneale @slevis-lmwg @wwieder @olyson @gustavo-marques @iangrooms @fobryan3 @klindsay28 @dabail10 @duvivier @tilmes @mbramberger

Extra details:

Dominant language: No language data
Stars: 11
Forks: 3
PR merge metrics: No merged PRs in 30d

Contributor guide

No contributing guide indexed for this repository

First steps

Read the whole issue, then the project's contributing guide.
Comment on the issue to say you are picking it up — it saves two people doing the same work.
Fork the repository and make your change on a branch.
Open a pull request that references the issue number.

Similar issues

[Feature]: support other MPI launchers Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

ROCm/rocHPL#36 · Opened Sep 16, 2026
AI and HPC Tutorial Evaluation and Report Open

Difficulty 2/5 1-3 hours Newbie friendliness 68/100

see-insight/see-insight.github.io#48 · Opened Sep 15, 2026
ODR violation in GWN Open

App Integration bug compiler Quest User Request

Difficulty 2/5 1-3 hours Newbie friendliness 88/100

llnl/axom#1983 · Opened Sep 15, 2026
cuda.compute (v2/HostJIT): make_histogram_even keys its build cache on num_output_levels and num_samples although the v2 build takes both at runtime Open

Difficulty 2/5 1-3 hours Newbie friendliness 78/100

NVIDIA/cccl#11418 · Opened Sep 15, 2026
?rotg and ?rotmg do not nan_unify their outputs; raw NaN payloads and signs leak Open

Difficulty 2/5 1-3 hours Newbie friendliness 76/100

urbit/SoftBLAS#34 · Opened Sep 13, 2026

More HPC issues