Operating Systems·Introduction & System Calls·CoreWhere did the time go?time ./program reports: real 0m8.4s user 0m1.2s sys 0m0.3s Where did the other seven seconds go?AIn kernel mode; sys only counts system calls, not kernel workBIn other processes, which real does not distinguish from oursCIt is a measurement error; real should equal user plus sysDWaiting: for I/O, or for the CPU while other processes ranCheck answer