I don't have a Raspberry Pi to test it. But I think ECL may fit better because of its small footprint: http://ecls.sourceforge.net
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
6573 pi 20 0 546m 36m 7580 S 1.6 19.8 1:55.26 armcl