[ESPResSo-users] CUDA error: out of memory

[Markus Gusenbauer]

Hi all,

is the number of nodes with the LBM on GPU limited by hardware? When I 
choose too large simulation size, I get a CUDA out of memory error.
Right now I am limited to around 8,320,000 nodes (200x200x208), after 
that it crashes.

Example:

setmd time_step 0.1
setmd skin 0.2
thermostat off

set boxX 200
set boxY 200
set boxZ 208

setmd box_l $boxX $boxY $boxZ

lbfluid gpu grid 1 dens 1.0 visc 1.5 tau 0.1 friction 0.5

set cycle 0
while { $cycle<100 } {
    puts "$cycle / 100 \r";

    for { set i 1 } { $i < [expr $boxX-1]} { incr i } {
        for { set j 1 } { $j < [expr $boxY-1] } { incr j } {
            for { set k 0 } { $k < 1 } { incr k } {
                lbnode $i $j $k set u 0.0 0.0 0.001
            }
        }
    }

    integrate 1
    incr cycle
}


Thanks!

Markus