linux-kernel - Re: perf test unwind failing

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Date:	Fri, 27 Nov 2015 13:17:40 -0300
From:	Arnaldo Carvalho de Melo <acme@...nel.org>
To:	Jiri Olsa <jolsa@...hat.com>
Cc:	Jiri Olsa <jolsa@...nel.org>, Namhyung Kim <namhyung@...nel.org>,
	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	masami.hiramatsu.pt@...achi.com, David Ahern <dsahern@...il.com>
Subject: Re: perf test unwind failing

Em Fri, Nov 27, 2015 at 01:03:11PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Fri, Nov 27, 2015 at 09:21:21AM +0100, Jiri Olsa escreveu:
> > On Thu, Nov 26, 2015 at 05:45:59PM -0300, Arnaldo Carvalho de Melo wrote:
> > > 	Can you take a look at 'perf test unwind'? It is failing in my
> > > perf/core branch, no time to bisect that now.
> See above.
> 
> After reading the patch I see why you refer to that patch, it is just
> that at machine__exit() one should free the kernel maps if they were
> created, so it calls machine__destroy_kernel_maps(), and that will check
> if the maps were allocated, if not, nothing will be done.
> 
> Anyway, I applied your patch, it fixes the problem, thanks!

Applied this one to my local tree:

>From 9bdcede563a831f139b5fc872f028ef844a7462e Mon Sep 17 00:00:00 2001
From: Jiri Olsa <jolsa@...hat.com>
Date: Fri, 27 Nov 2015 09:21:21 +0100
Subject: [PATCH 1/1] perf test: 'unwind' test should create kernel maps

The 'perf test unwind' is failing because it forgot to create the kernel
maps, fix it.

After the patch:

  # perf test unwind
  40: Test dwarf unwind         : Ok

Reported-and-Tested-by: Arnaldo Carvalho de Melo <acme@...hat.com>
Signed-off-by: Jiri Olsa <jolsa@...hat.com>
Cc: David Ahern <dsahern@...il.com>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>
Cc: Namhyung Kim <namhyung@...nel.org>
Link: http://lkml.kernel.org/r/20151127082121.GA24503@krava.brq.redhat.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>
---
 tools/perf/tests/dwarf-unwind.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/tools/perf/tests/dwarf-unwind.c b/tools/perf/tests/dwarf-unwind.c
index b2357e8115a2..3cce13b19cbb 100644
--- a/tools/perf/tests/dwarf-unwind.c
+++ b/tools/perf/tests/dwarf-unwind.c
@@ -173,6 +173,11 @@ int test__dwarf_unwind(int subtest __maybe_unused)
 		return -1;
 	}
 
+	if (machine__create_kernel_maps(machine)) {
+		pr_err("Failed to create kernel maps\n");
+		return -1;
+	}
+
 	callchain_param.record_mode = CALLCHAIN_DWARF;
 
 	if (init_live_machine(machine)) {
-- 
2.1.0

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