Messages in this thread | | | From | Philippe.LAFFONT@st ... | Date | Thu, 14 Jun 2001 15:19:17 +0200 | Subject | Strange behaviour of the Round Robin policy |
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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.
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