What's the unit of RSS in psutil.Process.get_memory_info?

The output of ps is in kiloBytes. RSS (resident set size) from psutil is in bytes.

>>> 802816 / 784
1024 

From man ps:

rss         RSS       resident set size, the non-swapped physical 
           memory that a task has used (in kiloBytes).  (alias rssize, rsz).