width=0.15
bin(x)=width*floor(x/width)+width/2.0

set output 'latency.png'
set terminal pngcairo size 1800,300
set logscale xy
set boxwidth width
set xrange [0.5:200]
plot '<grep true latency_to_size.txt |awk "{print \$2}"' using (bin($1)):(1.0) smooth freq with boxes title 'latency, ms'