Final update,
I swapped the CF card from the net5501 that showed "rtc: lost some
interrupts..." to a different net5501, purchased at the same time,
but with a slightly lower MAC address.
Over 4 days and no "rtc: lost some interrupts..." errors. Only 1
interrupt error at startup "spurious 8259A interrupt: IRQ7"
# cat /proc/interrupts
CPU0
0: 422596357 XT-PIC-XT timer
1: 0 XT-PIC-XT i8042
2: 0 XT-PIC-XT cascade
4: 72 XT-PIC-XT serial
8: 432642647 XT-PIC-XT rtc
11: 1723397 XT-PIC-XT eth0
14: 43482 XT-PIC-XT ide0
15: 0 XT-PIC-XT ehci_hcd:usb1, ohci_hcd:usb2
NMI: 0
ERR: 1
Hopefully my documenting this issue might help others.
Even on the other net5501, 2-3 interrupt errors per week is only 4
parts per BILLION, so even my OCD should accept that. :-)
Lonnie
On Feb 29, 2008, at 1:16 PM, Darrick Hartman (lists) wrote:
> Lonnie Abelbeck wrote:
>> On Feb 29, 2008, at 12:50 PM, Kristian Kielhofner wrote:
>>
>>> On Fri, Feb 29, 2008 at 1:43 PM, Lonnie Abelbeck
>>> <[EMAIL PROTECTED]> wrote:
>>>> Update,
>>>>
>>>> On my net5501 I am still getting these messages... but not often.
>>>>
>>>> # grep interrupts /var/log/messages
>>>> Feb 22 17:31:29 voip user.warn kernel: rtc: lost some
>>>> interrupts at
>>>> 1024Hz.
>>>> Feb 23 18:13:16 voip user.warn kernel: rtc: lost some
>>>> interrupts at
>>>> 1024Hz.
>>>> Feb 26 09:05:46 voip user.warn kernel: rtc: lost some
>>>> interrupts at
>>>> 1024Hz.
>>>> Feb 29 12:06:15 voip user.warn kernel: rtc: lost some
>>>> interrupts at
>>>> 1024Hz.
>>>>
>>>>
>>> Lonnie,
>>>
>>> I was getting that on my net5501 too.
>>>
>>> Have you tried loading ztdummy and running zttest? I was getting
>>> HORRIBLE results, rarely above %25... I gave up on it after that.
>>>
>>> I wonder if there are more of these with oscillator problems than
>>> originally thought...
>>> --
>>> Kristian Kielhofner
>>
>> Kristian,
>>
>> No, zttest works fine...
>>
>> # zttest -c 10
>> Opened pseudo zap interface, measuring accuracy...
>> 99.942474% 99.969040% 99.963676% 99.940628% 99.962402% 99.939651%
>> 99.963867%
>> 99.940918% 99.965050% 99.964157%
>> --- Results after 10 passes ---
>> Best: 99.969 -- Worst: 99.940 -- Average: 99.955186, Difference:
>> 99.997548
>>
>> Do you have any insight on what would cause this to happen only every
>> 24-48 hours?
>>
>> Safe to ignore it?
>
> Lonnie,
>
> I've seen that before, but not lately on my net5501. I have one box
> that's been in production since October with no problems. Another few
> that have been put into production more recently. I do have zaptel
> hardware in all of these boxes.
>
> Darrick
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