linux-kernel - Re: [PATCH 5/9] perf tools: Set maximum precise value for event 'p' modifier

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Date:	Fri, 10 May 2013 11:12:19 +0200
From:	Jiri Olsa <jolsa@...hat.com>
To:	David Ahern <dsahern@...il.com>
Cc:	linux-kernel@...r.kernel.org,
	Corey Ashford <cjashfor@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Ingo Molnar <mingo@...e.hu>,
	Namhyung Kim <namhyung@...nel.org>,
	Paul Mackerras <paulus@...ba.org>,
	Peter Zijlstra <a.p.zijlstra@...llo.nl>,
	Arnaldo Carvalho de Melo <acme@...hat.com>,
	Andi Kleen <ak@...ux.intel.com>,
	Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 5/9] perf tools: Set maximum precise value for event 'p'
 modifier

On Thu, May 09, 2013 at 01:43:52PM -0600, David Ahern wrote:
> On 5/9/13 7:32 AM, Jiri Olsa wrote:
> >+static int precise_default(void)
> >+{
> >+	int precise = perf_precise__get();
> >+	static int warned;
> >+
> >+	/*
> >+	 * Precise info not supported by by this kernel,
> >+	 * set 1 as the precise value.
> >+	 */
> >+	if (precise == -1)
> >+		precise = 1;
> >+
> >+	/* PEBS is not supported here, display warning. */
> >+	if (precise == 0 && !warned++)
> >+		pr_warning("warning: no precise support, "
> >+			   "using non-precise event(s)\n");
> 
> WARN_ONCE().

ah, forgot we have this one ;) thanks

jirka
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