virtuoso-t constantly segfaulting

Thomas Tanghus thomas at
Fri Jan 31 06:00:58 GMT 2014

On Thursday 30 January 2014 22:04 Gene Heskett wrote:
> On Thursday 30 January 2014 21:54:58 Thomas Tanghus did opine:
> > On Thursday 30 January 2014 21:39 Duncan wrote:
> > > > I did not know akonadictl had that option! Will try it as soon as I
> > > > get back.
> > > > 
> > > > 
> > > > 
> > > > I now see that it also has a 'vacuum' option, but the help text just
> > > > says "Vacuum internal storage". Do you have any idea what it does?
> > > 
> > > Active databases (and filesystems, which work similarly) typically
> > > create and delete a lot of records/files.  Akonadi deals with
> > > messaging, so consider email and IM messages as they come in, with a
> > > lot of them being spam and thus often deleted.  But for performance
> > > reasons most databases and filesystems don't normally entirely wipe
> > > all those deleted records (files) at the time of deletion; they
> > > simply mark them as deleted in their index(s) somewhere and continue.
> > 
> > Thanks for the very detailed explanation Duncan. I wasn't familiar with
> > the "vacuuming" term, but the assumptions I made seemed to be right.
> > 
> > In another matter, @Gene:
> > > Interesting Duncan, but my old 10.04.4 LTS version of it doesn't seem
> > > to recognize that and doesn't do anything but throw a help screen, so
> > > I have to stop, and restart kmail at least daily or it just gets
> > > slower and slower.  I assume the effect is the same?
> > 
> > "but my old 10.04.4 LTS version"
> > 
> > Gene, old lad, you're one LTS behind. I appreciate conservatism to a
> > certain degree, but you really need to upgrade.
> Thanks for the flowers "lad" Indeed... :)  But I am stuck with kernel
> 2.6.32-132-rtai to be able to run linuxcnc even in the sim mode.  But we (I
> have mice in my pocket) should be ready to upgrade by 14.04 IF we can patch
> that kernel.  Paolo M. is behind on maintaining the rtai patch kit in
> regard to late kernels.  The xenomai patchkit also looks promising but
> doesn't manage the almost vanishingly small latency jitter figures that the
> RTAI patches can.  That is rather important when running stepper motors as
> jitter burns up available torque.

I should have trimmed this post, but I wouldn't know where :D

I could have spent an hour or two looking up linuxcnc, rtai, xenomai patchkit, 
and so forth, but it seems to me you should be running a separate box (or 
virtual box) for your "stepper motors". I vaguely remember you mentioning it, 
but also then thought that it wasn't anyway relevant to a "desktop" 

Trying seriously to be as diplomatic as possible, I'd say that you should 
really consider separating your mission critical work from you day-to-day work 
> Cheers, Gene

To you too, and sorry if I sounded condescending - I'm not sure I have the age 
for it in this forum :)

Med venlig hilsen / Best Regards

Thomas Tanghus
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