Mark Dedlow wrote:
> But this is a tangent to my observation about the big differences
> in performance estimates, i.e. Victor says 10-20 conn/sec
> while you say you see 500 conn/sec. Obviously, conn/sec is highly
> dependent upon machine. Victor didn't qualify what machine he
> meant 10-20 would be the max, but I assume he meant something
> like a typical single processor Linux x86 system (400-500Mz).
> If you're getting 25-50 times that on a two processor alpha,
> something other than the machine would have to account for
> the difference, no?
Well, from a theoretical standpoint, an Alpha flavour of chip running
at, say 500Mhz should have comparable floating-point performance to an
Intel flavour of chip running at the same internal clock rate. The
Alpha chip should have an edge of no more than 50% on a per-CPU basis.
Architechtural issues should only account for 5% or so (ie. inter-CPU
bus & cache design).
SSL is, as far as I understand, highly floating-point intensive, as it
must (typically) calculate RSA algorithms in software. The Alpha chip
should excel in this area. But not by an order of magnitude.
I am running dual Pentium II processors at 400MHz under Linux 2.2.15
(RedHat 6.0) and I typically achieve on the order of 10-20 conn/sec.
Translating that to, say, a dual 800MHz Alpha box, we double: 20-40
conn/sec, then add 50%: 30-60 conn/sec, add maybe another 10%: 33-66
conn/sec. That's not the supposed 500 conn/sec. described previously in
this thread.
-Adam
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Adam Thompson, MCNE, MCSE, CWT, A+
Vice-President / Chief Technology Officer, Commerce Design Inc.
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