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

[David Ahern]

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().

David
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