Re: garbage returned from do_gettimeofday

From: anton wilson (anton.wilson@camotion.com)
Date: Thu Sep 19 2002 - 10:53:19 EST


On Wednesday 18 September 2002 07:00 pm, anton wilson wrote:
> I'm using do_gettimeofday in the scheduler, once per schedule.
> Ocassioanlly, i'll get what seems to be a random garbage number.
> For example:
>
> tv_sec tv_usec
> 1032378775 627501
> 1032378775 627521
> 3433001412 1
> 1032378775 627573
> 1032378775 627617
> 1032378775 627638
>
> or
>
> 1032379233 253008
> 1032379233 253028
> 3387638236 1
> 1032379233 253068
> 1032379233 253125
>
>
> The garbage number tv_sec always seems to begin with a 3 and is followed by
> 9 digits. The tv_usec garbage number is always 1.
>

Even more stangely, I'll get a sequence of the same garbage time from
do_gettimeofday, interleaved with good values:

tv_sec tv_usec jiffies

1032450154 41056 -- 108690]
1032450154 42045 -- 108690]
1032450154 42056 -- 108690]
1032450154 43045 -- 108690]
1032450154 43056 -- 108690]

/*garbage starts here*/
3390722356 1 -- 108690]
1032450154 43090 -- 108690]
3390722356 1 -- 108690]
1032450154 43177 -- 108690]
3390722356 1 -- 108690]
1032450154 43204 -- 108690]
3390722356 1 -- 108690]
1032450154 43257 -- 108690]
3390722356 1 -- 108690]
1032450154 43287 -- 108690]
3390722356 1 -- 108690]
/*garbage values stop for now*/
1032450154 44064 -- 108690]

1032450154 44084 -- 108690]
1032450154 44212 -- 108690]
1032450154 45047 -- 108690]
1032450154 45059 -- 108690]
1032450154 46045 -- 108690]

I'm using 2.4.19 with rc2, low-latency, premptive, O(1), and kdb patches.

Anton
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This archive was generated by hypermail 2b29 : Mon Sep 23 2002 - 22:00:26 EST