Timing

Posted by BogdanM on
URL: http://elua-development.15.s1.nabble.com/Timing-tp2422112p2422135.html

I get 21us with this slighly modified version (of the original post):

local tmr, dtime, t1, t2 = tmr
term.clrscr()
while 1 do
 t1 = tmr.start(0)
 t2 = tmr.read(0)
 dtime = tmr.diff(0,t2,t1)
 term.gotoxy(1,1)
 term.putstr(string.format("Time (us): %06d",dtime))
end

Not that bad IMO.

Best,
Bogdan

On Wed, Feb 18, 2009 at 11:46 PM, Dado Sutter <dadosutter at gmail.com> wrote:

> Fernando, could you run this simple script on the EK-1100 and report AVR32
> performance ?
>
> We have a MOD711, with an ST711 (ARM7) too but after strugling (and
> achieving ! :) to make it work on Linux,  OpenOCD now refuses to flash our
> kit :( :( :( :(
>
> Best
> Dado
>
>
>
>
>
>
>
>
> On Wed, Feb 18, 2009 at 17:15, James Snyder <jbsnyder at fanplastic.org>wrote:
>
>> OK. At least I know my compiler isn't messed up :-)
>> I'm curious now though whether similarly clocked ARM7 vs AVR vs Cortex-M3
>> (ARM Thumb2) vs etc.. do for these types of tests.
>>
>> -jsnyder
>>
>> On Feb 18, 2009, at 10:24 AM, Dado Sutter wrote:
>>
>> Hello,
>>
>> On Wed, Feb 18, 2009 at 10:59, James Snyder <jbsnyder at fanplastic.org>wrote:
>>
>>>
>>> > On Wed, Feb 18, 2009 at 02:19, James Snyder <jbsnyder at fanplastic.org>wrote:
>>> >
>>>>
>>>> So, one of the things I've been doing recently is tracking timing data
>>>> for adcscope.lua when running it.  I've found certain things that increase
>>>> or decrease the amount of time spent getting samples, but I hadn't actually
>>>> checked what the bare minimum time would be for a dry loop like the
>>>> following:
>>>> >
>>>> > term.clrscr()
>>>> >
>>>> > while 1 do
>>>> >  t1 = tmr.start(0)
>>>> >  t2 = tmr.read(0)
>>>> >  dtime = tmr.diff(0,t2,t1)
>>>> >  term.gotoxy(1,1)
>>>> >  term.putstr(string.format("Time (us): %06d",dtime))
>>>> > end
>>>> >
>>>> > For LM3S6965, I get 79 us.  Is this correct?
>>>
>>>
>> 79us exactly in my EK-LM3S8962 too.
>> (And I've figured out that you have disabled XMODEM Xfer on your build :)
>>
>> Abra?osssssssssss
>> Dado
>>
>> _______________________________________________
>> Elua-dev mailing list
>> Elua-dev at lists.berlios.de
>> https://lists.berlios.de/mailman/listinfo/elua-dev
>>
>>
>>   --
>> James Snyder
>> Biomedical Engineering
>> Northwestern University
>> jbsnyder at fanplastic.org
>> http://fanplastic.org/key.txt
>> ph: (847) 644-2322
>>
>>
>> _______________________________________________
>> Elua-dev mailing list
>> Elua-dev at lists.berlios.de
>> https://lists.berlios.de/mailman/listinfo/elua-dev
>>
>>
>
> _______________________________________________
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