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Date: Wed, 11 Dec 2013 12:28:14 -0700
From: David Ahern <dsahern@gmail.com>
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To: Alexander Shishkin <alexander.shishkin@linux.intel.com>,
        Peter Zijlstra <a.p.zijlstra@chello.nl>,
        Arnaldo Carvalho de Melo <acme@ghostprotocols.net>
CC: Ingo Molnar <mingo@redhat.com>, linux-kernel@vger.kernel.org,
        Frederic Weisbecker <fweisbec@gmail.com>, Jiri Olsa <jolsa@redhat.com>,
        Mike Galbraith <efault@gmx.de>, Namhyung Kim <namhyung@gmail.com>,
        Paul Mackerras <paulus@samba.org>,
        Stephane Eranian <eranian@google.com>, Andi Kleen <ak@linux.intel.com>,
        Adrian Hunter <adrian.hunter@intel.com>
Subject: Re: [PATCH v0 13/71] perf tools: Add machine__get_thread_pid()
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On 12/11/13, 5:36 AM, Alexander Shishkin wrote:
> From: Adrian Hunter <adrian.hunter@intel.com>
>
> Add a function to get the pid from the tid.
>
> This is needed when using the sched_switch
> tracepoint to follow object code execution.
> sched_switch identifies the thread but, to
> find the process mmaps, we need the process
> pid.

Are you looking up the current or next task? If the former why not use 
sample->pid rather than parsing the sched_switch tracepoint?

David