lkml.org 
[lkml]   [2001]   [Jun]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    /
    From
    Date
    SubjectStrange behaviour of the Round Robin policy
         I'm using RedHat Linux V2.2.13 and I made the following test:

    I launched 10 times the same program with priority 10 of Round Robin
    policy (from a shell having priority 20 of FIFO policy). Each program
    does an infinite busy loop (while (1)).
    One minute later, I launched the "ps" command and I was expected that
    the TIME values of all these processes are in an interval which is T
    large, where T is given by sched_rr_get_interval() i.e. T=150ms in
    this release.

    But the ps result was:
    PID TTY TIME CMD
    652 tty1 00:00:00 login
    1549 tty1 00:00:00 bash
    1566 tty1 00:00:00 bash
    1596 tty1 00:01:12 my_program
    1597 tty1 00:00:02 my_program
    1598 tty1 00:00:01 my_program
    1599 tty1 00:00:01 my_program
    1600 tty1 00:00:05 my_program
    1601 tty1 00:00:01 my_program
    1602 tty1 00:00:00 my_program
    1603 tty1 00:00:16 my_program
    1604 tty1 00:00:01 my_program
    1605 tty1 00:00:00 my_program
    1610 tty1 00:00:00 ps

    Does someone have any explanation of this behavior? Thanks in advance.




    -
    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to majordomo@vger.kernel.org
    More majordomo info at http://vger.kernel.org/majordomo-info.html
    Please read the FAQ at http://www.tux.org/lkml/

    \
     
     \ /
      Last update: 2005-03-22 12:55    [W:5.272 / U:0.008 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site