#h event clock absdiff pctdiff
_null_getpage+128	815812813.281756	0	0
_null_getpage+128	815812813.328709	0.046953	5.7554e-09
_null_getpage+128	815812813.353830	0.025121	3.0793e-09
_null_getpage+128	815812813.357169	0.0033391	4.0929e-10
_null_getpage+128	815812813.375844	0.018675	2.2891e-09
_null_getpage+128	815812813.378358	0.002514	3.0816e-10
#  | /home/johnh/BIN/DB/dbrow 
#  | /home/johnh/BIN/DB/dbcol event clock
#  | dbrowdiff -i clock