[rrd-users] Port RRDTool to Arm/Linux - Which Linux?

[Tobias Oetiker]

Hi Robert,

I have never looked into this myself, but I remember reading about
different aproaches to doing floating point on arm and drastic
effects on rrdtool by the choice of method.

http://gcc.gnu.org/onlinedocs/gcc/ARM-Options.html

there is talk about -msoft-float

http://netwinder.osuosl.org/users/s/scottb/public_html/notes/FP-Notes-all.html

cheers
tobi

Yesterday Robert Easton wrote:

>
> Hi Petteri,
>
> Yikes thats slow. On debian/x86 the png is being generated instaneously. On
> the monitoring screen of our app we are cycling through graph displays every
> 10 seconds plus allow users to step through them at their own pace. We could
> have a network of 50 sensors, for instance, capturing data and the user
> scrolling through graphs (one for each sensor).
>
> Oh well I will build it and see what happens. :)
>
> Thanks Petteri,
> Mark
>
>
> Petteri Matilainen wrote:
> >
> > I haven't heard that soft-float thing before. From the link you
> > posted, it seems difficult to include it. I have once tried to set up
> > a cross-compiler environment but then there was cryptic configure or
> > make errors which I couldn't figure out. It was different toolchain
> > too.
> >
> > Compiling RRDtool natively wasn't difficult at all. I had to disable
> > compiler optimizations, though because if I didn't RRDtool would take
> > 30 minutes to run and display irrational numbers on the graphs (like
> > 2328742376547365). That was clearly some kind of math issue
> > (related?). At the moment it takes about 2 minutes to draw 2 PNGs that
> > have one dataset each. The unit is a temperature logger which takes 2
> > samples every minute and draws pictures every 5 minutes.
> >
> >
>
>

-- 
Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900