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shane@mainbox ~ $ vmstat
procs -----------memory---------- ---swap-- -----io---- --system-- ----cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
1 0 0 208000 16904 128524 0 0 4 3 1104 899 10 5 85 0
the above code is kind of missallighned. I think idle is 85 or 85%
this code will get it
I am not sure why your cpu usage according to vmstat is 0