Re: bad networking related lag in v2.6.22-rc2

From: Ingo Molnar
Date: Wed May 23 2007 - 07:06:44 EST



* Patrick McHardy <kaber@xxxxxxxxx> wrote:

> How is this trace to be understood? Is it simply a call trace in
> execution-order? [...]

yeah. There's a help section at the top of the trace which explains the
other fields too:

_------=> CPU#
/ _-----=> irqs-off
| / _----=> need-resched
|| / _---=> hardirq/softirq
||| / _--=> preempt-depth
|||| /
||||| delay
cmd pid ||||| time | caller
\ / ||||| \ | /
privoxy-12926 1.Ns1 0us : ktime_get_ts (ktime_get)

the function name in braces is the parent function. So in this case the
trace entry means we called ktime_get_ts() from ktime_get().

Ingo
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