Author: Jouni Uski
Date: 01:51:31 08/18/03
Go up one level in this thread
On August 18, 2003 at 04:20:01, Tony Werten wrote: >On August 17, 2003 at 19:05:57, Michael P. Nance Sr. wrote: > >>On August 17, 2003 at 17:44:53, Tony Werten wrote: >> >>>On August 17, 2003 at 17:34:14, William Penn wrote: >>> >>>>I've noticed that when running Shredder 7.04 UCI engine in CB Shredder 7 GUI in >>>>infinite analysis mode, there's a problem with the kN and kN/s counters after >>>>the total KN exceeds about 4,200,000. That's not an exact number, but >>>>approximated. >>> >>>I can make the pretty precise gues that problems start after 4,294,967,295 >>>nodes. >>> >>> >>>>In any case, kN reverts to zero at that point and begins counting >>>>up again. The value of kN/s also drops to zero then start increasing again (very >>>>slowly). I believe the 7.04 engine continues to work OK, just that counter is >>>>buggy. >>> >>>It's not buggy, it's 32 bit. >>> >>>Tony >>> >>> >>>>WP >>So with 64 bit technology it would go further? > >With a 64 bit counter it already would, (They are available in 32 bit >environment) but they are not the first logical choice (32 bit is). > >With todays fast computers, in some special cases (when you let it run for a >couple of days) 32 bit is not enough. > >OTOH hardly anybody lets it run that long and 64 bit numbers are a bit slower >then 32 bit. > >Tony Days? With most engines 32 counter resets after 1 hour on Pentium 2 GHz! Jouni
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