junius.Wang
Member
Dear WRF Community,
I'm encountering an issue with my WRF simulation where the program appears to stall during execution. The details are as follows:
Configuration:
- WRF Version: [WRFV4.6]
- Parameterization scheme: PBL5, MP38, CU16
- Computational Resources: 5 nodes, 320 cores in total on a supercomputer
- FDDA: 0 (in one case), 2 (in another case)
- namelist.input:
Issue Description:
1. The program stops producing output, but system processes show it's still running.
2. In one case (FDDA0), the simulation appears to stall while writing the wrfrst_d02 file. After forcibly terminating the program, I noticed the file size had increased by only 8KB.
3. In another case (FDDA2), the program also stalled at a certain point, but I couldn't identify the specific cause.
Attached Files:
1. namelist.input (for the FDDA0 and FDDA2 case)
2. Relevant rsl output files（delete some data in the middle to reduce size to upload)
3. Screenshot showing the stall during wrfrst_d02 writing
Questions:
1. What could be causing the program to stall during the restart file writing?
2. Are there known issues with this particular combination of parameterization schemes?
3. How can I diagnose the root cause of the stall in the FDDA2 case?
4. What additional debugging steps or information would be helpful to resolve this issue?
Any insights or suggestions would be greatly appreciated. I'm happy to provide any additional information that might be helpful in diagnosing this problem.
Thank you for your time and expertise.
Junius.
I'm encountering an issue with my WRF simulation where the program appears to stall during execution. The details are as follows:
Configuration:
- WRF Version: [WRFV4.6]
- Parameterization scheme: PBL5, MP38, CU16
- Computational Resources: 5 nodes, 320 cores in total on a supercomputer
- FDDA: 0 (in one case), 2 (in another case)
- namelist.input:
Code:
&time_control
run_days = 4,
run_hours = 0,
run_minutes = 0,
run_seconds = 0,
start_year = 2021, 2021,
start_month = 07, 07,
start_day = 21, 21,
start_hour = 12, 12,
start_minute = 00, 00,
start_second = 00, 00,
end_year = 2021, 2021,
end_month = 07, 07,
end_day = 25, 25,
end_hour = 12, 12,
end_minute = 00, 00,
end_second = 00, 00,
interval_seconds = 10800,
input_from_file = .true.,.true.,
adjust_output_times = .false.
history_interval_h = 3, 3,
history_begin_h = 6,
frames_per_outfile = 1000, 1000,
restart = .false.,
override_restart_timers = .false.,
output_ready_flag = .true.,
restart_interval = 1440,
io_form_history = 2,
io_form_restart = 2,
io_form_input = 2,
io_form_boundary = 2,
debug_level = 0,
auxinput4_inname = "wrflowinp_d<domain>",
auxinput4_interval = 360,
io_form_auxinput4 = 2,
io_form_auxinput2 = 2,
diag_print = 2,
output_diagnostics = 1,
auxhist3_outname = "wrfxtrm_d<domain>_<date>"
auxhist3_interval = 1440, 1440
frames_per_auxhist3 = 100, 100
io_form_auxhist3 = 2
/
&domains
time_step = 27,
time_step_fract_num = 0,
time_step_fract_den = 1,
max_dom = 2,
e_we = 307, 556,
e_sn = 334, 628,
e_vert = 47, 47,
eta_levels(1:47) = 1.000, 0.995, 0.990,
0.985, 0.980, 0.970,
0.960, 0.945, 0.930,
0.910, 0.890, 0.855,
0.820, 0.785, 0.750,
0.715, 0.680, 0.645,
0.610, 0.575, 0.540,
0.505, 0.470, 0.440,
0.410, 0.380, 0.350,
0.325, 0.300, 0.275,
0.250, 0.230, 0.210,
0.190, 0.170, 0.155,
0.140, 0.125, 0.110,
0.095, 0.080, 0.065,
0.050, 0.035, 0.020,
0.010, 0.000,
p_top_requested = 5000,
num_metgrid_levels = 34,
num_metgrid_soil_levels = 4,
dx = 9000, 3000
dy = 9000, 3000
grid_id = 1, 2,
parent_id = 1, 1,
i_parent_start = 1, 62,
j_parent_start = 1, 62,
parent_grid_ratio = 1, 3,
parent_time_step_ratio = 1, 3,
feedback = 1,
smooth_option = 0,
/
&physics
mp_physics = 38, 38,
!wsm6 wsm7 new Thompson 6 24 38
write_thompson_mp38table = .true.,
do_radar_ref = 1,
acc_phy_tend = 1, 1,
ra_lw_physics = 4, 4,
ra_sw_physics = 4, 4,
radt = 12, 12,
sf_sfclay_physics = 2, 2,
sf_surface_physics = 2, 2,
sf_urban_physics = 1, 1,
num_soil_layers = 4,
ifsnow = 1,
sst_update = 1,
bl_pbl_physics = 2, 2,
cu_physics = 16, 0,
sf_ocean_physics = 1,
windfarm_opt = 0, 0,
windfarm_ij = 1,
windfarm_wake_model = 0, 0,
windfarm_overlap_method = 0, 0,
!set value to 0 or 2
isftcflx = 1,
/
&fdda
grid_fdda = 0, 0,
gfdda_inname = "wrffdda_d<domain>",
gfdda_interval_m = 180,
io_form_gfdda = 2,
if_no_pbl_nudging_ph = 1,
if_no_pbl_nudging_t = 1,
if_no_pbl_nudging_q = 1,
if_no_pbl_nudging_uv = 0,
if_zfac_uv = 1,
k_zfac_uv = 20,
gph = 0.0003,
gt = 0.0003,
gq = 0.0001,
guv = 0.0003,
xwavenum = 3,
ywavenum = 3,
/
&dynamics
w_damping = 0,
diff_opt = 1, 1,
km_opt = 4, 4,
mix_isotropic = 0, 0,
diff_6th_factor = 0.12, 0.12,
base_temp = 290.
damp_opt = 3,
zdamp = 5000., 5000.,
dampcoef = 0.2, 0.2,
non_hydrostatic = .true., .true.,
moist_adv_opt = 1, 1,
scalar_adv_opt = 1, 1,
/
&bdy_control
spec_bdy_width = 5,
spec_zone = 1,
relax_zone = 4,
specified = .true., .false.,
nested = .false., .true.,
/
&namelist_quilt
nio_tasks_per_group = 0,
nio_groups = 2,
/Issue Description:
1. The program stops producing output, but system processes show it's still running.
2. In one case (FDDA0), the simulation appears to stall while writing the wrfrst_d02 file. After forcibly terminating the program, I noticed the file size had increased by only 8KB.
3. In another case (FDDA2), the program also stalled at a certain point, but I couldn't identify the specific cause.
Attached Files:
1. namelist.input (for the FDDA0 and FDDA2 case)
2. Relevant rsl output files（delete some data in the middle to reduce size to upload)
3. Screenshot showing the stall during wrfrst_d02 writing
Questions:
1. What could be causing the program to stall during the restart file writing?
2. Are there known issues with this particular combination of parameterization schemes?
3. How can I diagnose the root cause of the stall in the FDDA2 case?
4. What additional debugging steps or information would be helpful to resolve this issue?
Any insights or suggestions would be greatly appreciated. I'm happy to provide any additional information that might be helpful in diagnosing this problem.
Thank you for your time and expertise.
Junius.
Last edited: