Author: Ernst A. Heinz
Date: 10:19:44 11/20/98
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On November 20, 1998 at 12:49:47, Dave Gomboc wrote: > >Are you going to be able to keep this running? You've got faster hardware than >most of us, [...] SPECint95-wise the 500MHz Alpha-21164a is *not* faster than a 400MHz PII. "Fritz 5", "Junior 5", and "Nimzo 98/99" all normally process more nodes per second on a 400MHz PII than "DarkThought" on a 500MHz Alpha-21164a. >I wonder if you've just "nice'd" everything to >the maximum, so that people can still use the machines. No, "nice'd" runs do not make much sense if you want to make progress at these extreme search depths (especially because "DarkThought" uses neraly all the available RAM of the machines --> "nice'ing" leads to immediate swapping). >Can you estimate: > a) when 21.01 (Qb6) will be searched? > b) when 21.all will be searched? It looks like the effective branching factor increases to roughly 4 at these extreme depths with the completely overloaded hash tables. >I guess I am not even sure from the above that 20.all has been searched yet. You should re-read my post then because it states quite clearly that iteration #20 got completed (all moves searched) after roughly 70 hours. The computation of the PV (first move) finished after about 52 hours. Assuming an effective branching factor of 4, iteration #21 will then take an estimated 280 hours to complete with the computation of the first move finishing after an estimated 208 hours. =Ernst=
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