Hi - because you have so many input images, FLAME is being run a slice
at a time. However, you're right that it should not normally be taking
this long to complete each slice, so yes it does sound like something
is up - possibly your computer doesn't have enough RAM etc.? If you
look at top again, is most of the time indeed being taken with running
flame? How much %cpu is it getting, and how much RAM is it using? What
hardware and OS are you using?
One thing that might make a difference - in the latest patch release -
i.e. FSL-4.0.2, there was a minor script change in FEAT which means
that the splitting of the data into individual slices is done just
once rather than many many times (thanks to Tim for suggesting this).
So if your processing is taking ages because of the file IO and
fslsplit rather than the actual FLAME program, you should see an
improvement if you download the very latest version of FSL.
Cheers.
On 5 Dec 2007, at 17:56, James N. Porter wrote:
> Hello-
>
> I've set up a 3rd level analysis that has been running for 4 days
> now. I keep checking top, and the flame processes do restart
> approximately every 3-5 hours. So it seems that the iterations are
> moving along, but I've never had a 3rd level analysis last longer
> than half a day. Does 4+ days seem unreasonable for the following
> parameters?
>
> CPU: a pair of quad-core Intel Xeon processors at 2.66GHz each and a
> total of 16GB of RAM
>
> Inputs: 192 cope images, 4 each from 48 subjects
>
> Model: Flame 1, GLM set up as a paired samples design, a la the help
> page example, with EV 1 defining my contrasts of copes and EVs 2-25
> defining pairs of subjects to account for pair-by-pair
> intercorrelation (they were identical twins). My design summary can
> be seen here: http://www.tc.umn.edu/~norb0062/design.png
>
> Thanks for your input,
> --
> Jim Porter
> Graduate Student
> Clinical Science & Psychopathology Research
> University of Minnesota
>
>
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