linux-kernel - Re: perf report segfault

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Date:   Tue, 9 Oct 2018 23:41:58 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Anthony LaTorre <tlatorre9@...il.com>
Cc:     peterz@...radead.org, mingo@...hat.com, jolsa@...nel.org,
        acme@...nel.org, alexander.shishkin@...ux.intel.com,
        namhyung@...nel.org, linux-kernel@...r.kernel.org
Subject: Re: perf report segfault

On Tue, Oct 09, 2018 at 03:18:12PM -0500, Anthony LaTorre wrote:
> Ok, I can reliably reproduce it by profiling the following program:
> 
> #include <math.h>
> 
> int main(int argc, char **argv)
> {
>     int i;
>     double sum;
> 
>     while (1) {
>         sum += exp(++i);
>     }
> 
>     return 0;
> }
> 
> compiled with:
> 
> $ cc -o test test.c -lm
> 
> with the following command:
> 
> $ perf record -F 99 -p 20016 --call-graph dwarf sleep 10

still nothing.. any chance you could try on latest perf sources?

	$ git clone git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux.git
	$ cd linux
	$ git checkout -b perf/core origin/perf/core
	$ cd tools/perf
	$ make
	$ ./perf ...

you might need some packages mentioned in (search for 'yum install'):
  https://perf.wiki.kernel.org/index.php/Jolsa_Howto_Install_Sources

it's little outdated, but the packages lists will do

thanks,
jirka