From mboxrd@z Thu Jan  1 00:00:00 1970
From: David Ahern <dsahern@gmail.com>
Subject: Re: perf record always record the same kernel symbol
Date: Fri, 10 May 2013 13:12:42 -0600
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To: Chao Xu <caesarxuchao@gmail.com>
Cc: linux-perf-users@vger.kernel.org

On 5/10/13 1:04 PM, Chao Xu wrote:
> Hi,
>
> I issued the following commands:
> sudo perf record sleep 1
> sudo perf report

you are profiling the 'sleep' command which is not very exciting. Try:
   sudo perf record -a -- sleep 1
   sudo perf report

David