@@ -1,10 +1,11 @@
 #!/usr/bin/env gnuplot
-set terminal png size 1024, 1024
+set terminal png size 600, 1000
 set style data linespoints
 set output 'pthread_cpu_heavy_work.png'
-set multiplot layout 3,1
+set multiplot layout 3,1 title "wall, user and sys for CPU-bound work with 8 hyperthreads" font ",16"
 set xlabel "threads"
 
+set title font ",14"
 set title "wall, user and sys"
 set ylabel "time (s)"
 set yrange [-20:]
@@ -13,7 +14,7 @@ plot 'pthread_cpu_heavy_work.dat' using 1:2 title 'wall', \
      'pthread_cpu_heavy_work.dat' using 1:3 title 'user', \
      'pthread_cpu_heavy_work.dat' using 1:4 title 'sys'
 
-set title "wall, user and sys / threads"
+set title "wall, user and sys / threads ratio"
 set yrange [0:]
 set key right top
 plot 'pthread_cpu_heavy_work.dat' using 1:($2/$1) title 'wall', \