linux-kernel - Re: [BUG] perf mem: perf mem report fails in TUI mode

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Date:	Tue, 09 Dec 2014 22:18:17 -0700
From:	David Ahern <dsahern@...il.com>
To:	Stephane Eranian <eranian@...gle.com>,
	LKML <linux-kernel@...r.kernel.org>
CC:	Jiri Olsa <jolsa@...hat.com>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>,
	"mingo@...e.hu" <mingo@...e.hu>,
	Namhyung Kim <namhyung@...nel.org>,
	"ak@...ux.intel.com" <ak@...ux.intel.com>
Subject: Re: [BUG] perf mem: perf mem report fails in TUI mode

On 12/9/14 9:15 PM, Stephane Eranian wrote:
> Hi,
>
> I was running a couple of tests with perf mem from tip.git and
> found that perf mem -t load rep was failing only in TUI mode.
> With --stdio, it works fine. I did a bit of investigation and found
> out that the TUI mode is failing because some symbol (kernel)
> is showing up with a huge (negative) size. I don't understand
> the connection between the TUI vs. tty browser and symbols.
>
> To reproduce:
>      $ perf mem -t load rec my_test_program
>      $ perf mem -t load rep
>      $ perf mem -t load rep --stdio
>
> Debugging with TUI is a pain, so I stopped.
>
> I have a patch to improve perf mem a bit but I'd like to get this problem
> fixed first.
>
> Maybe you have a idea of what's going on.

I usually avoid the TUI by not installing slang-devel.

But, trying out Linus' current tip (a0e4467726c - post 3.18) this seems 
to work fine:
     perf mem -t load rec ls
     perf mem -t load rep

But kernel version for the box is 3.16.6-203.fc20.x86_64.

David
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