Re: Latency traces I cannot interpret (sa1100, 2.6.15-rc7-rt1)

["Kai Geek" <kaigeek@linuxmail.org>]

Hello,
i am inframed trace for irq14 bugging points. 

> * Lee Revell <rlrevell@joe-job.com> wrote:

> > It seems that either some code path really is forgetting to 
> > re-enable interrupts, or there's a bug in the latency tracer. 
> one question is, what do the kernel addresses visible in the first
> argument of asm_do_IRQ() correspond to:
>   trace1:MyThread-153   0D..1 5977us+: asm_do_IRQ (c030c170 1a 0)
>   trace1:MyThread-153   0D..1 15191us+: asm_do_IRQ (c030c1bc 1a 0)
>   trace2:  <idle>-0     0D..2 8822us+: asm_do_IRQ (c021da24 1a 0)
>   trace2:  <idle>-0     0Dn.2 8920us+: asm_do_IRQ (c021da24 b 0)
>   trace3:     top-169   0D..1 8802us+: asm_do_IRQ (c024e5fc 1a 0)
>   trace4:  insmod-185   0D..1 8794us+: asm_do_IRQ (c030c174 1a 0)
>   trace5:      dd-197   0D..1 8812us+: asm_do_IRQ (c02e4938 1a 0)
>   trace6: kthread-11    0d..3 2670us+: asm_do_IRQ (c02fe2d0 1a 0)
>   trace7:MyThread-95    0D..1  542us+: asm_do_IRQ (c02fe2d0 1a 0)
>   trace7:MyThread-95    0D..1 9755us+: asm_do_IRQ (c02fe2d0 1a 0)
> i.e. what is c02fe2d0, c021da24, c02e4938, etc.?
> but it seems most of the latencies are printk related: one possibility
> is that something is doing a costly printk with preemption disabled.
> 	Ingo
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Kai "Ozgur" Geek
Network Engineer
PGP ID: B1B63B6E
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