loss_scale=3
plot \
'kernel.dat' using 1:2:($3*loss_scale) title 'kernel', \
+ 'mmsg-mmsg.dat' using 1:2:($3*loss_scale) title 'mmsg-mmsg', \
'mmap-mmap.dat' using 1:2:($3*loss_scale) title 'mmap-mmap', \
'mmapbusy-mmap.dat' using 1:2:($3*loss_scale) title 'mmapbusy-mmap', \
'mmap-write.dat' using 1:2:($3*loss_scale) title 'mmap-write', \