From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Ahern <dsahern@gmail.com>
Subject: Re: Appended data not reportable
Date: Fri, 04 Jan 2013 16:17:44 -0700
Message-ID: <50E76318.8040805@gmail.com>
References: <50E75786.4040902@nist.gov>
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To: David Flater <dflater@nist.gov>
Cc: Perf Users <linux-perf-users@vger.kernel.org>

On 1/4/13 3:28 PM, David Flater wrote:
> With kernel/perf 3.7.1, trying to do something akin to the "sum" option of
> gprof to pool the samples from multiple runs.
>
> This option from the perf-record man page looked promising:
> -A, --append
>      Append to the output file to do incremental profiling.
>
> bash-4.2$ perf record -F 1000 ./app
> bash-4.2$ perf record -F 1000 -A ./app
>
> perf.data gets bigger, but then neither perf report nor perf script work.  Both
> say:
> 0x1a0 [0]: failed to process type: 0
>
> Is this a regression?

It's been broken for a long time now.

David