Hey everybody. I recently replaced my regular GIMPS machine with a 1GHz K7
system carrying 256MB of virtual channel SDRAM. The machine is crunching
through the last of the double checking assignments its predecessor was
issued, and I noticed that the per-iteration time of .075 seconds is a
little worse than the 1GHz Athlon reference system on the GIMPS homepage
(.07 seconds). I would have thought that the extra bandwidth VCSDRAM
provided would have helped things (sorry, no benchmarks using regular
SDRAM yet). Any ideas what could be slowing things down? Taskinfo 2000
shows no unusual processes on the system (the machine runs a PC firewall
in the background, but that uses <1% CPU).
I also noticed that the hard drive light blinks every second or so. Does
win98 agressively swap to disk like windows NT does, even when it's not
needed? At least for NT there was a magic registry hack to make it stop,
which I don't see in '98. I'm wondering if this is the cause of the
slowdown, though with an ATA hard drive the CPU usage should be
minimal. Is there any way short of disabling virtual memory to make the
constant swapping in '98 stop?
Thanks in advance,
jasonp
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