[lkml]   [2004]   [Sep]   [2]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
    SubjectRe: [patch] voluntary-preempt-2.6.9-rc1-bk4-Q7

    * K.R. Foley <> wrote:

    > This is an interesting one. ~3.9ms generated here by amlat in do_IRQ:

    the overhead is not in do_IRQ():

    > 00000001 0.000ms (+0.000ms): n_tty_receive_buf (pty_write)
    > 00010001 3.992ms (+3.992ms): do_IRQ (n_tty_receive_buf)

    the overhead is always relative to the previous entry - so the overhead
    was in n_tty_receive_buf() [that is the function that was interrupted by
    do_IRQ()]. But it's a bit weird - you should have gotten timer IRQs
    every 1 msec. Does n_tty_receive_buf() run with irqs disabled perhaps?

    To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
    the body of a message to
    More majordomo info at
    Please read the FAQ at

     \ /
      Last update: 2005-03-22 14:05    [W:0.019 / U:21.932 seconds]
    ©2003-2016 Jasper Spaans. hosted at Digital OceanAdvertise on this site