Re: Missing stack symbols with perf_event's perf report, despite -fno-omit-frame-pointer compilation

[Taeung Song <treeze.taeung@gmail.com>]

Hi,

On 04/19/2016 09:07 AM, Mark Davis wrote:
> I'm struggling getting perf_events to give me stack traces with symbols,
> despite reading many tutorials on the subject and doing (I think) all the
> necessary things. It's possible that my local install of perf (details on that
> below) is somehow botched? Anyway, here's what I did:
>
> main.cpp is a simple C++ program that calls a few functions defined in the same
> file, allocates some memory and frees it, and prints a few things out.
>
> compilation command:
>
>      gcc -std=c++11 -lstdc++ main.cpp -Og -fno-omit-frame-pointer -fno-inline -o
> arr_test
>
> profile command:
>
>      perf record -a -g -- ./arr_test && perf report --stdio
>
>
> I do get the following warnings about kernel symbols, but I don't think this
> should matter given that I only care about symbols in my application for now:
>

As a guide..
If you add ":u" to a event name, you can measure only at the user level e.g.

     perf record -ag -e cycles:u ./arr_test