Hi, Matt.
Thanks for your replying!
Kenji
--- Matt Glasser <[log in to unmask]> wrote:
> That's true, you need a lot of RAM for this to work.
> There isn't a way to multithread probtrackx with only a single copy of
> the info in the RAM. The diffusion samples are what take up the most memory
> in most probtrackx instances. You can reduce memory usage by cropping
> the diffusion volume to not include any empty space around the
> nodif_brain_mask.
>
> Peace,
>
> Matt.
>
> -----Original Message-----
> From: FSL - FMRIB's Software Library
> [mailto:[log in to unmask]] On Behalf
> Of Kenji
> Sent: Wednesday, June 23, 2010 6:05 AM
> To: [log in to unmask]
> Subject: Re: [FSL] Probtrackx on SGE
>
> Hi,
>
> Thanks Matt.
>
> >2) If you have individual pathways that take longer
> to track, launch
> several probtrackx processes with fractions
> > of the total number of samples you want to track
> and different --rseed
> values.
>
> In your method described, probtrackx needs many RAM
> because of reading merged_th, ph, f .
> Do you have plan that probtrackx allows single mask
> to parallelize tracking in order to speed up processing ?
> i.e. probtrackx splits number of seed voxels into
> number of threads and tracks from divided seeds independently.
>
> Thanks
> Kenji
>
>
> ----- Original Message -----
> From: "Matt Glasser" <[log in to unmask]>
> To: <[log in to unmask]>
> Sent: Tuesday, June 22, 2010 12:00 AM
> Subject: Re: [FSL] Probtrackx on SGE
>
>
> > You can already paralellize probtrackx in several
> ways. 1) if you have many subjects or pathways to track, submit each to SGE
> using fsl_sub. 2) If you have individual pathways that take longer to track, launch several
> > probtrackx processes with fractions of the total number of samples you want
> > to track and different --rseed values.
> >
> > Peace,
> >
> > Matt.
> >
> > -----Original Message-----
> > From: FSL - FMRIB's Software Library
> [mailto:[log in to unmask]] On Behalf
> > Of Kenji
> > Sent: Monday, June 21, 2010 1:36 AM
> > To: [log in to unmask]
> > Subject: [FSL] Probtrackx on SGE
> >
> > Hi,
> >
> > When is ProbtrackX set up to be parallelized ?
> 4.1.6 ?
> >
> > Thanks
> > Kenji
> >
>
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