So why does it say on my computer that you wrote this message December
31, 1969 in my Inbox? But, when I check the full headers:
>From you: Tue 4 Jan 100 01:1:44:47 -0500 (EST)
>From the list: Tue, 4 Jan 2000 20:50:51 -0800 (PST)
Sounds like Y2K on your end.
Aleksandar Bakic wrote:
>
> Hi,
>
> I have spent a lot of time trying to figure out why I am getting
> "Aiee" errors (mostly "scheduling in interrupt") after I've modified
> the rate-monotonic scheduler of the RTL. Based on what I found on the
> web (other people having similar problems), it seems that increments
> and decrements of the intr_count variable are not always paired. Since
> this variable is not mentioned in any RTL scheduler, could it be that
> preempting the Linux kernel at certain points can make it mishandle
> the intr_count variable? My modification (I already sent code that had
> a very minor bug, but was essentially the same as the latest one) is
> fairly simple, I just added the Linux kernel as another periodic
> task. The idea is depicted below
>
> Linux (aperiodic) +++-+-----------++-+
> Linux (period 5ms, demand <= 1ms) ---+----+----+----+-
> RTT (period 50ms, demand 10ms) -----+++-++++-+++---
>
> The Linux kernel has to do a lot of networking (my networking code
> runs only at user level). Without this periodic Linux kernel, the
> Epic100 NIC driver starts dropping packets after some time because it
> can't catch up, because RT tasks take too much time; the 3com
> Boomerang driver even causes a segfault because some sfb's are
> incorrectly passed to skb_free(). With the periodic Linux kernel, my
> code runs for some time, then I start getting bursts of the Aiee error
> (more and more, until it never disappears), and then also other Aiee
> and similar errors, when the system essentially crashes.
>
> Could someone please advise me how to approach this problem? Since the
> rewriting of the interrupt handling is the base of the RTL, I hope
> someone will be able to help.
>
> Thanks in advance,
> Aleks
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