Hi. Le lun. 7 oct. 2019 à 15:54, Alex Herbert <alex.d.herb...@gmail.com> a écrit : > > I have found a bug in the stress test application that affects all the > BigCrush results. > > This was found when updating the stress test application to support > 64-bit testing within PractRand, and testing of upper and lower 32-bits > from 64-bit out. An initial attempt to show that the lower 32-bits, bit > reversed, of the XOR_SHIFT_1024_S systematically fail Linear Complexity > tests did not work. > > The bug was a dual reversal of the platform byte-order. Code was added > to reverse the byte order in the link c application that read from stdin > and passes numbers to BigCrush. Later code was added to reverse the byte > order in the Java application so allowing Dieharder to work. The > original c application should have been updated but was not (despite the > fact I thought I had done this). So the byte order was not correct after > a dual reversal and the BigCrush results refer to a byte reversed output > sequence. > > I fixed the code and have verified that the stress test application can > identify Linear Complexity failures in XOR_SHIFT_1024_S. > > I am rerunning BigCrush for the other generators. > > Testing of generators with PractRand is still under trial and will > probably not make it for the 1.3 release. The only outstanding item for > 1.3 is continued work on updating the user guide.
The userguide (and web site) can be updated at any time (between releases); it is not be a blocker. Best regards, Gilles > > Alex --------------------------------------------------------------------- To unsubscribe, e-mail: dev-unsubscr...@commons.apache.org For additional commands, e-mail: dev-h...@commons.apache.org
