linux-kernel - Does perf inject preserve call chain data?

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Message-ID: <1337712585.3796.186.camel@schen9-DESK>
Date:	Tue, 22 May 2012 11:49:45 -0700
From:	Tim Chen <tim.c.chen@...ux.intel.com>
To:	Arnaldo Carvalho de Melo <acme@...stprotocols.net>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>, "; ak"@linux.intel.com
Subject: Does perf inject preserve call chain data?

Arnaldo,

Wonder if perf inject munged the call chain data from perf record?

When I do
perf record -a -g -o - sleep 5 |perf inject -v -b  | perf report  -g -i -
I get a complain from perf report

Warning:
Selected -g but no callchain data. Did you call 'perf record' without -g?

Thanks.

Tim

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