question about Intel P4 versus Alpha's
Henderson, TL Todd
Todd_Henderson at isl-3com.com
Wed Jan 8 10:49:26 EST 2003
I've just put a new cluster in place and have been monitoring some things
via top and found something peculiar and was wondering what others thought.
I have an app, that scaled out to the 30ish XP1000's we had very nicely,
basically linearly. If you looked at top, it was almost always in the
95-100%cpu utilization range. However, now we have a cluster of P4's and
when I look at top, it is more like 70-80% cpu usage. This is using the
same number of cpu's, the same switch, same code, and same problem for the
code. The jobs are still completing in about 30-40% less time, so we are
getting a speed up.
My guesstimate was that this was an indication of the memory bandwidth and
speed to memory. I know the XP1000's have a nice memory subsystem. Was/is
it that much better than the 533/2.4 ghz P4's?
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