git: test - Flesh out randread statistics reporting

[Matthew Dillon]

commit 9022bcc8c0e94b834076723970831961f8b9a6fd
Author: Matthew Dillon <dillon at apollo.backplane.com>
Date:   Mon Mar 20 18:27:34 2017 -0700

    test - Flesh out randread statistics reporting
    
    * Cleanup the output.  Report the aggregate IOPS, average latency,
      aggregate bandwidth, low and high latencies, and the standard
      deviation for the test on a per-second basis.
    
    * Standard deviation notes:
    
      68%	    Of the samples are within 1 standard deviation, so if the
    	    reported stddev is 7uS, then 68% of the samples are +/- 7uS
    	    of the average reported value.
    
      95.45%    Of the samples are within 2 standard deviations.  +/- 14uS
    	    in the example.
    
      99.73%    Of the samples are within 3 standard deviations.  +/- 21uS
    	    in the example.

Summary of changes:
 test/sysperf/randread.c | 131 ++++++++++++++++++++++++++++++++++++++++++------
 1 file changed, 115 insertions(+), 16 deletions(-)

http://gitweb.dragonflybsd.org/dragonfly.git/commitdiff/9022bcc8c0e94b834076723970831961f8b9a6fd


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