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SubjectRe: 2.9test9-mm1 and DAO ATAPI cd-burning corrupt
On Mon, 10 Nov 2003, bill davidsen wrote:

> Looking at the system time being used I would say that this is doing
> something odd. If that's using DMA then for some reason is it doing a
> shitload of system calls at those times? I bet you're losing interrupts,
> getting nasty mousing, and I would wonder about dropping incoming
> network packets as well.
>
> | deadline:
> | procs -----------memory---------- ---swap-- -----io---- --system--
> | ----cpu----
> | r b swpd free buff cache si so bi bo in cs us
> | sy id wa
> | 0 0 0 455400 52760 309808 0 0 464 430 1824 1107 13
> | 6 72 8
> | 0 0 0 455400 52760 309808 0 0 0 31 1264 617 2
> | 0 98 0
> | 1 0 0 455384 52760 309808 0 0 0 0 1441 1267 4
> | 2 94 0
> | 0 0 0 455376 52760 309808 0 0 0 0 1489 1957 4
> | 3 93 0
> | 0 0 0 455616 52800 309912 0 0 144 0 1390 1519 13
> | 5 69 13
> | 1 0 0 447016 52800 312712 0 0 2800 0 2040 1476 34
> | 7 35 24

procs -----------memory---------- ---swap-- -----io---- --system------cpu----
r b swpd free buff cache si so bi bo in cs us sy id wa
0 0 0 455400 52760 309808 0 0 464 430 1824 1107 13 6 72 8
0 0 0 455400 52760 309808 0 0 0 31 1264 617 2 0 98 0
1 0 0 455384 52760 309808 0 0 0 0 1441 1267 4 2 94 0
That looks like fairly low system time and generally idle system to me,
and the interrupt rate isn't high at all.
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