On 03/09/2012 06:25 PM, Mulyadi Santosa wrote: > Hi :) > > On Fri, Mar 9, 2012 at 18:39, Daniel Hilst<danielhilst@xxxxxxxxx> wrote: >> The processes that appear in top with brackets are the kernel threads? > > Yup :) > >> If so, this threads spend all its time on system mode, right? > > Yes, it supposed to ... > >> By the >> system mode I mean the %sy on top header, since kernel threads hasn't >> any memory mapped to user space, it can't run on user space at any time, >> right? > > IIRC, kernel thread simply "borrow" any previous scheduled task's > address space. In that matter, it also has user address space. So, if > wanted, kernel thread could access user space. But normally it doesn't > do it. > >> >> >> So the total of system mode usage is the sum of all processes processing >> in kernel space, plus the kernel threads processing, right? > > remember that kernel threads are also processes, so no need to > differentiate between normal processes and kernel threads, especially > when we talk about CPU utilization. > Thanks Mulyadi! -- Follow the white rabbit! _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
