* help-about ISR
@ 2006-03-29 12:34 Kevin Jia
2006-03-29 14:29 ` Frank Ch. Eigler
0 siblings, 1 reply; 2+ messages in thread
From: Kevin Jia @ 2006-03-29 12:34 UTC (permalink / raw)
To: systemtap
I want to use systemtap trace ISR(interrput service routine), but I
have no idea that how trace the interrupt? So could anybody give me
some help? A example is better.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: help-about ISR
2006-03-29 12:34 help-about ISR Kevin Jia
@ 2006-03-29 14:29 ` Frank Ch. Eigler
0 siblings, 0 replies; 2+ messages in thread
From: Frank Ch. Eigler @ 2006-03-29 14:29 UTC (permalink / raw)
To: Kevin Jia; +Cc: systemtap
"Kevin Jia" <jiaminghao@gmail.com> writes:
> I want to use systemtap trace ISR(interrput service routine), but I
> have no idea that how trace the interrupt? [...]
You would need to pick functions in the interrupt service chain to
focus on. You would insert a probe into those functions, and arrange
for the probe handlers to print something. Some of the lower level
functions are "blacklisted" (deemed unsafe for direct probing), so
higher level, device-driver-level ones are better.
probe module("foo").function("foo_interrupt_handler"),
module("bar").function("bar_interrupt_handler"),
kernel.function("baz_interrupt_handler")
{
print ("in " . probefunc())
}
- FChE
^ permalink raw reply [flat|nested] 2+ messages in thread
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2006-03-29 12:34 help-about ISR Kevin Jia
2006-03-29 14:29 ` Frank Ch. Eigler
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