On 12/5/10 3:18 PM, Steve Kargl wrote: > Sometime in the last 7-10 days, some one made a > change that has broken process accounting/timing. > > laptop:kargl[42] foreach i ( 0 1 2 3 4 5 6 7 8 9 ) > foreach? time ./testf > foreach? end > Max ULP: 0.501607 for x in [-18.000000:88.709999] with dx = 1.067100e-04 > 69.55 real 38.39 user 30.94 sys > Max ULP: 0.501607 for x in [-18.000000:88.709999] with dx = 1.067100e-04 > 68.82 real 40.95 user 27.60 sys > Max ULP: 0.501607 for x in [-18.000000:88.709999] with dx = 1.067100e-04 > 69.14 real 38.90 user 30.02 sys > Max ULP: 0.501607 for x in [-18.000000:88.709999] with dx = 1.067100e-04 > 68.79 real 40.59 user 27.99 sys > Max ULP: 0.501607 for x in [-18.000000:88.709999] with dx = 1.067100e-04 > 68.93 real 39.76 user 28.96 sys > Max ULP: 0.501607 for x in [-18.000000:88.709999] with dx = 1.067100e-04 > 68.71 real 41.21 user 27.29 sys > Max ULP: 0.501607 for x in [-18.000000:88.709999] with dx = 1.067100e-04 > 69.05 real 39.68 user 29.15 sys > Max ULP: 0.501607 for x in [-18.000000:88.709999] with dx = 1.067100e-04 > 68.99 real 39.98 user 28.80 sys > Max ULP: 0.501607 for x in [-18.000000:88.709999] with dx = 1.067100e-04 > 69.02 real 39.64 user 29.16 sys > Max ULP: 0.501607 for x in [-18.000000:88.709999] with dx = 1.067100e-04 > 69.38 real 37.49 user 31.67 sys > > testf is a numerically intensive program that tests the > accuracy of expf() in a tight loop. User time varies > by ~3 seconds on my lightly loaded 2 GHz core2 duo processor. > I'm fairly certain that the code does not suddenly grow/loose > 6 GFLOP of operations. > I know it's a lot to ask but it may be something that you can help with if you had the time to triangulate in on the change that did it.. I presume that since you are an "old hand" you can check out sources at different revisions..Received on Sun Dec 05 2010 - 23:00:36 UTC
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