linux-kernel - Re: [PATCH V2 1/9] perf tools: add test for reading object code

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Date:	Wed, 31 Jul 2013 14:46:24 -0300
From:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
To:	Adrian Hunter <adrian.hunter@...el.com>
Cc:	linux-kernel@...r.kernel.org, David Ahern <dsahern@...il.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jiri Olsa <jolsa@...hat.com>, Mike Galbraith <efault@....de>,
	Namhyung Kim <namhyung@...il.com>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <peterz@...radead.org>,
	Stephane Eranian <eranian@...gle.com>,
	Ingo Molnar <mingo@...nel.org>
Subject: Re: [PATCH V2 1/9] perf tools: add test for reading object code

Em Wed, Jul 31, 2013 at 02:28:33PM -0300, Arnaldo Carvalho de Melo escreveu:
> Still investigating, but the attached patch is needed to handle such
> failure cases:
 
> [root@zoo ~]# perf test 21
> 21: Test object code reading                               : FAILED!
> [root@zoo ~]# perf test -v 21

Lowering the freq to 4kHz gets me to where I think you was at this
point:

[root@zoo ~]# perf test -v 21
21: Test object code reading                               :
--- start ---
Looking at the vmlinux_path (6 entries long)
symsrc__init: cannot get elf header.
Using /lib/modules/3.11.0-rc2+/build/vmlinux for symbols
Parsing event 'cycles'
Reading object code for memory address: 0xffffffff8101ce7d
File is: /lib/modules/3.11.0-rc2+/build/vmlinux
On file address is: 0xffffffff8101ce7d
dso__data_read_offset failed
---- end ----
Test object code reading: FAILED!
[root@zoo ~]# 

I.e. we need the follow on patches to fix this issue, right?

I'll merge my changes with your first patch and continue from there.

- Arnaldo
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