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

From: David Ahern
Date: Wed Dec 10 2014 - 00:18:30 EST

On 12/9/14 9:15 PM, Stephane Eranian wrote:

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.

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