"Dom " <domass@blueyonder.co.uk> wrote

"m" <no_nomine@hotmail.com> wrote

that thought about hyperthreading in P4s is touching on a thought I had.

The

P4 laptop I have tried running units on (2.8GHz, 1GByte 266MHz RAM) seems
rather disappointing relative to a 1.2GHz P3 laptop I've used. I was
wondering whether running 2 clients in parallel (i.e. 2 separate caches)
would produce a < 2x processing time per unit. Anyone tried this? I'm
reluctant to embark on this as the max. daytime temperature here is

Southern

England is well into the 30s Celsius at present.

Yep, It's hotter than normal over here.  34C in my main PC room with
the Aircon running on full and an extra fan:-(

I believe the Hyperthreading only applies to the xeon version of the
P4 - Very expensive server version.  Not the normal home version and
almost certainly not the mobile version.  But I could be wrong.

133/533FSB 3.06GHz P4 is hyperthreading enabled, as are all the 200/800FSB
P4s - 2.4, 2.6, 2.8 & 3.0GHz.  That is if your motherboard and O/S are
hyperthreading capable of course...

You will get better throughput running two instances of the CLI on a
hyperthreading P4 - nothing like double but you will get more results/day
than when only running one CLI.  It is likely to get hotter with the CPU
more fully utilised but P4 should throttle itself back if it gets too hot.
If your 2.8GHz P4M only has the 133/533FSB (likely with 133/266MHz RAM) then
it is not hyperthreading enabled AFAIK thus you'll lose out running two
instances of the CLI client...

Ciao...

[UK]_Nick...