[Wrf-users] Segmentation Fault with Nested NMM core Runs
Eric Altshuler
ela at cola.iges.org
Sun Jan 11 18:17:28 MST 2009
Hello Mac,
It looks like you have mistakenly used the values for the nest 'Right' (64) and 'Top' (70) (from the Domain Wizard information box) in your namelist.input as e_we and e_sn, respectively, instead of 'NX' (103) and 'NY' (115) which are the correct nest dimensions. In your namelist.input you should have:
e_we = 118, 103,
e_sn = 190, 115,
You also need to give values for the vertical dimensions of the nest as well as the coarse domain:
s_vert = 1, 1,
e_vert = 38, 38,
Otherwise, e_vert for the nest (second column) will assume a default value which may not be 38. The vertical dimension has to be the same for all domains.
Best regards,
Eric L. Altshuler
Assistant Research Scientist
Center for Ocean-Land-Atmosphere Studies
4041 Powder Mill Road, Suite 302
Calverton, MD 20705-3106
USA
E-mail: ela at cola.iges.org
Phone: (301) 902-1257
Fax: (301) 595-9793
----- Original Message -----
From: "mmacleod" <mmacleod at scotiaweather.com>
To: wrf-users at ucar.edu
Sent: Friday, January 9, 2009 10:21:49 AM GMT -05:00 US/Canada Eastern
Subject: [Wrf-users] Segmentation Fault with Nested NMM core Runs
Good morning.
I am wrestling with a problem with the NMM core since the past two week.
I always get a Segmentation Fault on running with a nested grid. We
run the same two grids utilizing the ARW core and it executes
correctly every time.
We are looking to operate a 4 km grid over the Maritime Provinces of
Canada to be driven by the NAM 12 km grib files available from NCEP and
to nest a 1 .333 km grid within the 4 km grid covering the Annapolis
Valley area of Nova Scotia and running for the same times as the 4 km grid.
We have obtained the latest version of the Domain Wizard and use it to
set-up the domains. We continue to get a segmentation fault error each
time we try to run the NMM core with the 1 km grid. It always comes on
the initial cycle of domain 2 which is the 1 km grid. We think this is
because the system is placing grid 2 outside the window of grid one but
we don't know why. It could be the compile of the model but we need to
know what to change to correct this problem if it is the compile.
What we find is the domain two appears outside grid 1 when we reopen the
Domain Wizard, even though the parameters for each grid remain
unchanged in the specs portion of the domain window in the Domain
Wizard. I have tried editing the namelist.wps and namelist.input files
to get a match but the problem persists.
I an attaching the namelist.wps, namelist.input files used to run the
WRF_NMM core. I am also attaching three png files that show the initial
grid setup (HGTEST_Screen1.png), the redisplay of the grid locations
when we open the Domain Wizard again after running the model
(HGTEST_Screen2.png) and the changed grid with the nesting specs
(HGTEST_Scree3.png) where one can see the nesting specs are unchanged
despite the change in location of the windows on the Domain Wizard
display. I am also including a display of the output form the
WRF_NMM run showing the Segmentation fault error.
We are running on a dual Quad processor system (Xeon 5472 processors at
3 GHz), with 8 GBytes of RAM utilizing the Ubuntu O/S and the GNU
gfortran compiler to build the model core.
If anyone can provide guidance on the solving of our problem, we will be
appreciative of the information.
Thank you in advance for your attention to this important matter.
Sincerely
Mac MacLeod
--
M.A. (Mac) MacLeod
President and General Manager
Scotia Weather Services Inc
192 Wyse Road, Suite 8,
Dartmouth, N.S. B3A 1M9
Tele: 902-468-3866
Fax: 902-461-1768
E-mail: mmacleod at scotiaweather.com
Visit us: www.scotiaweather.com
&time_control
run_days = 0,
run_hours = 0,
run_minutes = 10,
run_seconds = 0,
start_year = 2008, 2008,
start_month = 12, 12,
start_day = 10, 10,
start_hour = 12, 12,
start_minute = 00, 00,
start_second = 00, 00,
tstart = 00, 00,
end_year = 2008, 2008,
end_month = 12, 12,
end_day = 10, 10,
end_hour = 15, 15,
end_minute = 00, 00,
end_second = 00, 00,
interval_seconds = 10800,
history_interval = 60, 60,
frames_per_outfile = 1, 1,
restart = .false.,
reset_simulation_start = .false.,
io_form_input = 2,
io_form_history = 2,
io_form_restart = 2,
io_form_boundary = 2,
io_form_auxinput1 = 2,
auxinput1_inname = "met_nmm.d<domain>.<date>",
debug_level = 50,
/
&domains
time_step = 10,
time_step_fract_num = 0,
time_step_fract_den = 7,
max_dom = 2,
s_we = 1, 1,
e_we = 118, 64,
s_sn = 1, 1,
e_sn = 190, 70,
s_vert = 1,
e_vert = 38,
num_metgrid_levels = 40,
dx = 0.025651, 0.0085503
dy = 0.025628, 0.0085427
grid_id = 1, 2,
parent_id = 0, 1,
i_parent_start = 1, 30,
j_parent_start = 1, 32,
parent_grid_ratio = 1, 3,
parent_time_step_ratio = 1, 3,
p_top_requested = 5000.,
ptsgm = 42000.,
eta_levels = 1.000, 0.994, 0.983, 0.968, 0.950, 0.930, 0.908, 0.882, 0.853, 0.821,
0.788, 0.752, 0.715, 0.677, 0.637, 0.597, 0.557, 0.517, 0.477,
0.438, 0.401, 0.365, 0.332, 0.302, 0.274, 0.248, 0.224, 0.201,
0.179, 0.158, 0.138, 0.118, 0.098, 0.078, 0.058, 0.038, 0.018, 0.000,
tile_sz_x = 0,
tile_sz_y = 0,
numtiles = 1,
/
&physics
mp_physics = 5, 5,
ra_lw_physics = 99, 99,
ra_sw_physics = 99, 99,
nrads = 72, 216,
nradl = 72, 216,
co2tf = 1,
sf_sfclay_physics = 2, 2,
sf_surface_physics = 2, 2,
bl_pbl_physics = 2, 2,
nphs = 6, 6,
cu_physics = 2, 0,
ncnvc = 6, 6,
tprec = 3,
theat = 6,
tclod = 6,
trdsw = 6,
trdlw = 6,
tsrfc = 6,
pcpflg = .false.,
isfflx = 0,
ifsnow = 0,
icloud = 0,
num_soil_layers = 4,
mp_zero_out = 0,
/
&fdda
/
&dynamics
/
&bdy_control
spec_bdy_width = 1,
specified = .true.,
nested = .false.,
/
&grib2
/
&namelist_quilt
nio_tasks_per_group = 0,
nio_groups = 1,
/
&share
wrf_core = 'NMM',
max_dom = 2,
start_date = '2008-12-10_12:00:00', '2008-12-10_12:00:00',
end_date = '2008-12-10_15:00:00', '2008-12-10_15:00:00',
interval_seconds = 10800,
io_form_geogrid = 2,
opt_output_from_geogrid_path = '/wrf/domains/nmm/HGTTEST/',
debug_level = 0,
/
&geogrid
parent_id = 1,1,
parent_grid_ratio = 1,3,
i_parent_start = 1,30,
j_parent_start = 1,32,
e_we = 118,103,
e_sn = 190,115,
geog_data_res = '10m','30s',
dx = 0.025651,
dy = 0.025628,
map_proj = 'rotated_ll',
ref_lat = 45.75,
ref_lon = -64,
geog_data_path = '/wrf/geog_data',
opt_geogrid_tbl_path = '/wrf/domains/nmm/HGTTEST/',
ref_x = 59.0,
ref_y = 95.0,
/
&ungrib
out_format = 'WPS',
prefix = 'FILE',
/
&metgrid
fg_name = 'FILE',
io_form_metgrid = 2,
opt_output_from_metgrid_path = '/wrf/domains/nmm/HGTTEST/',
opt_metgrid_tbl_path = '/wrf/domains/nmm/HGTTEST/',
/
&mod_levs
press_pa = 201300 , 200100 , 100000 ,
95000 , 90000 ,
85000 , 80000 ,
75000 , 70000 ,
65000 , 60000 ,
55000 , 50000 ,
45000 , 40000 ,
35000 , 30000 ,
25000 , 20000 ,
15000 , 10000 ,
5000 , 1000
/
&domain_wizard
grib_data_path = '/mnt/sigma_wrf/grib_data/NAM2008121012',
grib_vtable = 'Vtable.NAM',
dwiz_name =HGTTEST
dwiz_desc =Testing of 4 km and 1 km grids
dwiz_user_rect_x1 =605
dwiz_user_rect_y1 =196
dwiz_user_rect_x2 =701
dwiz_user_rect_y2 =302
dwiz_show_political =true
dwiz_center_over_gmt =true
dwiz_latlon_space_in_deg =5
dwiz_latlon_linecolor =-8355712
dwiz_map_scale_pct =25
dwiz_truelat1 =45.75
dwiz_truelat2 =45.75
dwiz_stand_lon =-64.0
dwiz_map_vert_scrollbar_pos =0
dwiz_map_horiz_scrollbar_pos =0
dwiz_gridpt_dist_km =4.0
dwiz_mpi_command =
/
_______________________________________________
Wrf-users mailing list
Wrf-users at ucar.edu
http://mailman.ucar.edu/mailman/listinfo/wrf-users
More information about the Wrf-users
mailing list