On Tue, 27 Oct 2015 20:12:13 +0800 Chunyan Zhang <zhang.chun...@linaro.org> wrote:
> There's no need to record the time tracepoints take when tracing is off. > This is because: > 1) We cannot see these records since ring_buffer record is off at that > moment. > 2) If tracing is off and benchmark tracepoint is enabled, the time > tracepoint takes is fewer than the same situation when tracing is on, > since the tracepoints need to be wrote into ring_buffer, it would > take more time. If turn on tracing at this moment, the average and > standard deviation cannot exactly present the time that tracepoints > take to write data into ring_buffer. > Thanks! I'll add this when I get back from traveling. -- Steve > Signed-off-by: Chunyan Zhang <zhang.chun...@linaro.org> -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
