Increase speed of program

[IBarahimi]

I ran EPOCH on a system with 16-cpu and it use only 8-cpu while I ran it with
mpirun -np 16 ./epoch2d
How can I edit it to use all 16-cpu?
I added dlb_threshold=1 in the input.deck

[TomGoffrey]

How many cells do you have in your simulation? Can you share your input deck?

[IBarahimi]

I used this command :
mpirun -np 32 --oversubscribe ./epoch2d

And it used all of 32 cpu

[TomGoffrey]

Note that having to do this indicates that mpirun doesn't think there are 32 physical CPUs.

[IBarahimi]

begin:constant lambdalaser = 1030.0 * nano ne0 = 2.5e23 W_M = 30.0e-6 #in meter r0 = 1.2 * 30.0e-6 re = 2.8179403229e-15 s1 = (1.0/(pi * re * W_M * W_M))*(1.0*y/W_M)^(10) + ne0 s2 = 1.0271e24 Wp02 = (ne0*qe*qe)/(me*epsilon0) WL2 = (4*pi*pi*c*c)/(lambdalaser*lambdalaser) Vg = (1-Wp02/(2*WL2)-(2*c*c)/(WL2*W_M*W_M))*c end:constant begin:control dlb_threshold=1 nx = 43689 #dx=1030e-9/10 nx=4500e-6/dx ny = 194 #dy=1030e-9/2.5 ny=80e-6/dy t_end = 1666667 * femto x_min = 0.0 * micro x_max = 4500.0 * micro y_min = -40.0 * micro y_max = 40.0 * micro stdout_frequency = 100 end:control begin:boundaries bc_x_min = simple_laser bc_x_max = open bc_y_min = open bc_y_max = open end:boundaries begin:laser boundary = x_min lambda = lambdalaser intensity_w_cm2 = 1.77e17 profile = gauss(y, 0.0, W_M) t_profile = gauss(time, 40.0*femto, 16.986436*femto) t_start = 0.0 * femto t_end = 80.0 * femto end:laser begin:laser boundary = x_min lambda = lambdalaser intensity_w_cm2 = 8.49e16 profile = gauss(y, 0.0, W_M) t_profile = gauss(time, 2780*femto, 424.6609*femto) t_start = 1780 * femto t_end = 3780 * femto end:laser begin:species name = electron charge = -1.0 mass = 1.0 temp = 58023.0 #equal to 5 electron volt density = if((y lt 36.0e-6) or (y gt -36.0e-6), s1 , s2) npart_per_cell = 5 end:species begin:window move_window = T window_v_x = Vg window_start_time = 16780.0e-15 bc_x_min_after_move = open bc_x_max_after_move = open end:window begin:output name = normal file_prefix = normal use_offset_grid=T dt_snapshot = 2000.0 * femto poynt_flux = always grid = always ex = always ey = always number_density = always end:output begin:output name = restart file_prefix = restart restartable = T dt_snapshot = 60000.0 * femto end:output # # # # # # # # # #

…

On Thu, Feb 13, 2025 at 8:12 PM Tom Goffrey ***@***.***> wrote: Note that having to do this indicates that mpirun doesn't think there are 32 physical CPUs. — Reply to this email directly, view it on GitHub <#777 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BO2DGEITUBERVSBX6A7ITGL2PTDONAVCNFSM6AAAAABW4TUNVGVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTEMJZGAZTINQ> . You are receiving this because you modified the open/close state.Message ID: ***@***.*** com>

[IBarahimi]

Hi I sent you may input.deck On Thu, Feb 13, 2025 at 11:52 PM Iman Barahimi ***@***.***> wrote:

…

begin:constant lambdalaser = 1030.0 * nano ne0 = 2.5e23 W_M = 30.0e-6 #in meter r0 = 1.2 * 30.0e-6 re = 2.8179403229e-15 s1 = (1.0/(pi * re * W_M * W_M))*(1.0*y/W_M)^(10) + ne0 s2 = 1.0271e24 Wp02 = (ne0*qe*qe)/(me*epsilon0) WL2 = (4*pi*pi*c*c)/(lambdalaser*lambdalaser) Vg = (1-Wp02/(2*WL2)-(2*c*c)/(WL2*W_M*W_M))*c end:constant begin:control dlb_threshold=1 nx = 43689 #dx=1030e-9/10 nx=4500e-6/dx ny = 194 #dy=1030e-9/2.5 ny=80e-6/dy t_end = 1666667 * femto x_min = 0.0 * micro x_max = 4500.0 * micro y_min = -40.0 * micro y_max = 40.0 * micro stdout_frequency = 100 end:control begin:boundaries bc_x_min = simple_laser bc_x_max = open bc_y_min = open bc_y_max = open end:boundaries begin:laser boundary = x_min lambda = lambdalaser intensity_w_cm2 = 1.77e17 profile = gauss(y, 0.0, W_M) t_profile = gauss(time, 40.0*femto, 16.986436*femto) t_start = 0.0 * femto t_end = 80.0 * femto end:laser begin:laser boundary = x_min lambda = lambdalaser intensity_w_cm2 = 8.49e16 profile = gauss(y, 0.0, W_M) t_profile = gauss(time, 2780*femto, 424.6609*femto) t_start = 1780 * femto t_end = 3780 * femto end:laser begin:species name = electron charge = -1.0 mass = 1.0 temp = 58023.0 #equal to 5 electron volt density = if((y lt 36.0e-6) or (y gt -36.0e-6), s1 , s2) npart_per_cell = 5 end:species begin:window move_window = T window_v_x = Vg window_start_time = 16780.0e-15 bc_x_min_after_move = open bc_x_max_after_move = open end:window begin:output name = normal file_prefix = normal use_offset_grid=T dt_snapshot = 2000.0 * femto poynt_flux = always grid = always ex = always ey = always number_density = always end:output begin:output name = restart file_prefix = restart restartable = T dt_snapshot = 60000.0 * femto end:output # # # # # # # # # # On Thu, Feb 13, 2025 at 8:12 PM Tom Goffrey ***@***.***> wrote: > Note that having to do this indicates that mpirun doesn't think there are > 32 physical CPUs. > > — > Reply to this email directly, view it on GitHub > <#777 (reply in thread)>, > or unsubscribe > <https://github.com/notifications/unsubscribe-auth/BO2DGEITUBERVSBX6A7ITGL2PTDONAVCNFSM6AAAAABW4TUNVGVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTEMJZGAZTINQ> > . > You are receiving this because you modified the open/close state.Message > ID: ***@***.*** > com> >

[TomGoffrey]

This is almost certainly an issue with hardware, MPI, or both. Unfortunately we're only able to assist with EPOCH related problems.