Re: [Bug] ARM 'perf' regression by commit a43cb95d5

From: Ming Lei
Date: Fri May 17 2013 - 05:48:31 EST

On Fri, May 17, 2013 at 5:36 PM, Will Deacon <will.deacon@xxxxxxx> wrote:
> It's probably easier if you choose a workload, otherwise it's difficult to
> see what is `correct' and what is broken. For example, your broken output
> seems to be in the smsc95xx driver, so assumedly there's a bunch of
> networking going on whereas your other output is in cpuidle_enter_state.

If all modules are removed, the result will become OK. And if I only insert one
module, the top sample will fall inside the only module, but I am sure
nothing is working on the symbols of the module.

> We need an apples-for-apples comparison if you think there's a bug in the
> kernel. Can you try profiling hackbench or something?
>> Or could anyone else try to verify the problem on their own environment?
> How are you running perf top?

sudo perf top

Ming Lei
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