In article <Ywy2c.3021$sq2.581@newsfe2-gui.server.ntli.net>,
Gonzo <james@FUCKSPAMFUCKzerblattzoo.co.uk> wrote:

"Nicholas" <crfreaks@yahoo.com> wrote in message
news:4047b6f8$1_2@127.0.0.1...

Depending on how fast the cpu's are, NOT how many,,, also depends on what
arc they are build on, how much Cache memory per cpu,, seti Does not

support

muti CPU's so if they ran 18,000 seti's i would say each one would take
about, 2 hours to complet.. Thats 216,000 wu in one day

one of the computers we use for rendering at my company has 8x ahtlon xp
cpus and we found this out the hard way ... i was quite annoyed seti doesnt
support multi cpus as it has a combined speed of 17.6ghz. each cpu does a wu
in about 3 hours which translates into a mere 192 a day assuming it has all
that free cpu time. if seti did support multi cpus it would take maybe 7 1/2
mins per wu. will BOINC support multi cpus?

If it takes 3 hours on one CPU, it wouldn't do any better than 22.5 minutes
(3 hours == 180 minutes; 180 / 8 = 22.5) with all 8 working on one.

The reality is that it'd take more; SMP isn't 100% efficient, what with
the overhead of distributing task slices, multiple CPUs accessing one
memory bus, and so on.

Running one S@h task per CPU is the most efficient use of the hardware.


Gary

-- 
Gary Heston  gheston@hiwaay.net 

Contrary to popular opinion, _not_ everyone loves Raymond.