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Date: Mon, 6 Apr 2015 16:35:35 -0700
From: Andi Kleen <ak@linux.intel.com>
To: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Cc: Linux PPC dev <linuxppc-dev@ozlabs.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>,
        Michael Ellerman <michaele@au1.ibm.com>,
        Arnaldo Carvalho de Melo <acme@kernel.org>
Subject: Re: perf report broken for branch stack samples
Message-ID: <20150406233535.GF15335@tassilo.jf.intel.com>
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On Wed, Apr 01, 2015 at 02:32:54PM +0530, Anshuman Khandual wrote:
> Hello,
> 
> perf report is not showing up the branch stack sample results in the
> from_symbol ---> to_symbol format even if the perf.data file has got
> the samples (through 'perf record -b <workload>' session). Perf report

Sorry for the late answer. This was already fixed in tip by 

commit fefd2d9619de3bf0bf02a8622e9f445c3d19cc3f
Author: He Kuang <hekuang@huawei.com>
Date:   Sun Feb 15 10:33:37 2015 +0800

    perf report: Fix branch stack mode cannot be set

-Andi