linux-kernel - Re: [PATCH v2 00/15] tracing: 'hist' triggers

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Message-ID: <54F4BECD.6030608@opersys.com>
Date:	Mon, 02 Mar 2015 14:49:33 -0500
From:	Karim Yaghmour <karim.yaghmour@...rsys.com>
To:	Steven Rostedt <rostedt@...dmis.org>,
	Alexei Starovoitov <ast@...mgrid.com>
CC:	Tom Zanussi <tom.zanussi@...ux.intel.com>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Namhyung Kim <namhyung@...nel.org>,
	Andi Kleen <andi@...stfloor.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Ingo Molnar <mingo@...nel.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>
Subject: Re: [PATCH v2 00/15] tracing: 'hist' triggers


On 15-03-02 02:45 PM, Steven Rostedt wrote:
> Interesting. The Android devices I have still have it enabled (rooted,
> but still running the stock system).

I don't know that there's any policy to disable tracing on Android. The
Android framework in fact has generally been instrumented by Google
itself to output trace info into trace_marker. And the systrace/atrace
tools made available to app developers need to get access to this
tracing info. So, if Android had tracing disabled, systrace/atrace
wouldn't work.
https://developer.android.com/tools/debugging/systrace.html

-- 
Karim Yaghmour
CEO - Opersys inc. / www.opersys.com
http://twitter.com/karimyaghmour

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