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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