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Measuring Kernel Marker Overhead

Oct 09, 2007, 12:00 (0 Talkback[s])

"'It looks to be about 2.1% increase in time to do the make/mount/unmount operations with the marker patches in place and no blktrace operations,' Alan Brunelle summarized some benchmarks testing the overhead of the kernel markers patches. He continued, 'with the blktrace operations in place we see about a 3.8% decrease in time to do the same ops.' Block layer maintainer Jens Axboe responded favorably, 'thanks for running these numbers. I don't think you have to bother with it more. My main concern was a performance regression, increasing the overhead of running blktrace.' He added, 'I'd say the above is Good Enough for me,' acking the kernel marker patches..."

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