Timo Buhrmester wrote: > On -current amd64 (GENERIC and GENERIC.MP), per-process CPU time > accounting seems wrong to me, judging from watching top(1) and ps(1) > while compiling stuff. > > [...] > > Occasionally the pertinent programs do show up, but with *very* little > apparent CPU usage: > | load averages: 2.87, 2.00, 1.63 flap.localdomain > 23:47:19 > | 38 processes: 36 idle, 2 on processor > | CPU0 states: 60.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 40.0% > idle > | CPU1 states: 42.3% user, 0.0% nice, 0.0% system, 0.0% interrupt, 57.7% > idle > | Memory: Real: 49M/1139M act/tot Free: 2077M Cache: 643M Swap: 0K/2224M > | > | PID USERNAME PRI NICE SIZE RES STATE WAIT TIME CPU COMMAND > | 11425 root 64 0 19M 20M onproc - 0:00 0.29% cc1 > | 14278 root -6 0 4380K 5172K sleep piperd 0:00 0.10% as > | 7894 root 18 0 2268K 4388K sleep pause 0:01 0.05% make > | 19935 root 10 0 528K 1492K sleep wait 0:00 0.05% cc
When building software, you usually have a lot of compiler processes coming and going. The CPU utilization stats (in the header) are more averaged than the process list stats. So, when building you're likely to see a lot of CPU utilization in the per-CPU stats but no offending process in the list.
