[visionegg] Re: thanks, but corrections already done and
- From: Christoph Lehmann <lehmann@xxxxxxxxxxxx>
- To: visionegg@xxxxxxxxxxxxx
- Date: 09 May 2003 19:36:57 +0200
thanks!
1) I don't want this, since I was happy about the fact, that VE would be
platform-independent...
2) I am a linux newbie.... frome where to get help?
3) impossible, since with trials of 15s. I will have missed e.g.15
volumes in fmri and this destroys the experiment
...
christoph
On Fri, 2003-05-09 at 19:32, Andrew Straw wrote:
> It seems you are running into the same problems I warn about for linux
> in the "platforms" page of the Vision Egg website.
>
> I think you have three options if you want to keep using the Vision Egg:
>
> 1) Switch to Windows 2000 or XP, or Mac OS X, which don't have these
> problems in my experience. (Mac OS X has no LPT, though.)
>
> 2) Compile your own linux kernel with low-latency and pre-emptible
> stuff (patches?) and hope it works. (See the Vision Egg "platforms"
> webpage for starters.) I don't have time to go down this route, but it
> would be great if someone did. I'm not sure it will end up working,
> though.
>
> 3) Don't do experiments in max priority mode. Discard any trials where
> your timing wasn't perfect.
>
> Good luck!
> Andrew
>
> On Friday, May 9, 2003, at 12:54 PM, Christoph Lehmann wrote:
>
> > still some serious problems. See my latest mail "goodbye": the code
> > there has already been changed and equals the approach (2) you
> > recommended.
> >
> > to me it really seems to be a problem with max_priority under linux.
> > with many stimuli and the main-loop running more than 8 minutes, I got
> > sometimes breaks up to 15seconds, while I hear my harddisk doing lot of
> > work. But with the changed code, I know now, that it is not the
> > viewport
> > draw staff, this runs fine now, the breaks are at random anywhere and
> > must be due to some non-visionegg processes, not suppressed by
> > max_priority.
> >
> > and: even if this could be fixed with max_priority I still have the
> > problem, that I don't get any mouse-events while running in
> > max_priority
> > (I sent a mail to the SDL group, as you told me, but nobody answered
> > me,
> > sniff). And: setting max_priority to max_priority - x (x between 1 and
> > 98) doesn't enable to receive mouse-events.
> >
> > thanks for help. and, nice you are back, Andrew..my hope
> >
> > christoph
> >
> > --
> > Christoph Lehmann <lehmann@xxxxxxxxxxxx>
> > University Hospital of Clinical Psychiatry
> >
> > ======================================
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> > Website: http://www.visionegg.org/mailinglist.html
> >
>
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--
Christoph Lehmann <lehmann@xxxxxxxxxxxx>
University Hospital of Clinical Psychiatry
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