[r-t] Hyperthreading [was Exhausted search spaces]
sh at keystrata.co.uk
Mon Feb 8 10:26:27 UTC 2010
Mark (and Graham) wrote:
It turns out that on my machine, with hyperthreading enabled,
(a) a single instance of SMC32 produces 5.65m comps in 6 mins, a 2.7%
improvement compared with HT disabled
(b) two instances of SMC32 running the same PB6 search produce a total
of 6.12m comps produced in 6 mins, an increase of 11.3%
So as you say, disabling hyperthreading was counterproductive, if only
Since I'm now putting a new machine on the to-do list, I guess
processor speed is the main determinant of SMC performance. I don't
run any other CPU intensive applications these days.
Cheapest GHz on the market seems to be an AMD Phenom X4 3.4 at the
moment. Any thoughts?
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