I have just released collectd and SystemDataScope which should work now on SFOS 4.0.1. If you want to follow some specific processes, take a look into Plugin processes. Default config (/etc/collectd.conf) has examples on how to enable monitoring some processes. You would have to enable plugin (uncomment corresponding LoadPlugin in the top of config), uncomment and specify your processes in plugin config (section as shown below)
<Plugin processes>
Process "collectd"
Process "rrdtool"
Process "systemdatascope"
Process "sensorfwd"
Process "sensors.qcom"
</Plugin>
and restart collectd. After running for some time, just regenerate graphs in SystemDataScope settings. Plotting processes stats is supported already (if it is broken, please open an issue).