-smp 8 faster than -smp 4: even with HT off

Madals

Madals

Madals

Associate
Joined
2 Aug 2010
Posts
141
Location
Sussex
Basically, as the title says - the time taken to complete a work unit is faster when set to -smp 8 rather than -smp 4 even though I have HT off in the bios and am running a quad course.

Any idea's?
 
nope - had a bigadv unit 43% through with -smp8 going took 7mins per % on average. closed, re-opened with -smp4 and it only took 4mins per % (started where it left off)
 
Is that the other way around? you said -smp 8 is faster on a quad than -smp 4 but then you say -smp 8 took 7 mins/frame and smp 4 tool 4 mins/frame.

So what was faster?

Quad without HT:
4 threads wth SMP 4:
4 threads with SMP 8:

Quad with HT:
4 threads with SMP 4:
8 threads with SMP 8:

Oh and whats the specs of the PC, and what Work Unit Project ID was it?

Cheers
 
Yeah I did get that the wrong way around.
Without HT:
SMP 4 : 7mins
SMP 8 : 4mins

With HT:
Haven't done any with HT on as don't want the system to over heat with the high OC (running at 62degs steady at 100% load)

Not sure how to find the work unit ID?

Specs - i7 930 @ 4.2Ghz: 6gb RAM : GTX 480 (which is running the GPU client at the same time)
 
Use FAHMon or HFM.NET to check.

Seems strange that, would be interested to see the top part of your FAHlog.txt from when the client starts down to the first few % iteration, also maybe a screen cap of task manager showing the performance tab so we can see cpu load for each.

It could have something to do with the gpu, but not sure without further info. :)
 
All CPU's are running at 100% in both cases with no fluctuation.

To be honest, I have no clue and frankly it doesn't really matter as long as it gets it done faster!
 
You must log in or register to reply here.
Back
Top Bottom