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

[Robert Easton]

Hi Tobi,

Many thanks for those links. A little bit to digest there. I saw that
libfloat ( needed to satisfy -msoft-float generated interfaces) was part of
Debian but has not been maintained so has been removed. I will do an initial
build first as suggested by Petteri, then if it is too slow, then will try
some of these floating point options out.

Fun times. :)

Mark



Tobias Oetiker-3 wrote:
> 
> 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
> 
> _______________________________________________
> rrd-users mailing list
> rrd-users at lists.oetiker.ch
> https://lists.oetiker.ch/cgi-bin/listinfo/rrd-users
> 
> 

-- 
View this message in context: http://www.nabble.com/Port-RRDTool-to-Arm-Linux---Which-Linux--tp18766138p18769244.html
Sent from the RRDTool - User mailing list archive at Nabble.com.