On 24 May 2010 03:41, Glen Turner wrote:
> On Sun, 2010-05-23 at 17:02 +0800, tenz...@iinet.net.au wrote:
>> I'm seeking a preferably citeable reference to the amount of error
>> in the returned result from a Time() command. I want to be
>> able to quote the level of error in timing the execution
On Thu, May 27, 2010 at 08:04:45AM +1000, Martin Visser wrote:
> Risking totally going off-topic but analog thermistors are so old-school!
> ;-)
I bought a couple of LM335A (?) at the same time, but I figured I'd
get it working as well as possible with the basic thermistor to start.
> Check out t
Risking totally going off-topic but analog thermistors are so old-school!
;-)
Check out the DS18B20. Same size as transistor (TO-220) but is digitally
(one-wire serial) connected. No need for all that analog stuff and
curve-fitting. These are uniquely address, thus polled if need be (dozens on
the
On Wed, May 26, 2010 at 05:52:59PM +1000, Martin Visser wrote:
> Pretty much based on the knowledge that the MCU program counter is clocked
> on a 16MHz crystal (according to http://en.wikipedia.org/wiki/Quartz_clock
> they
> are generally good for 6 parts per million for standard grade crystals,
Pretty much based on the knowledge that the MCU program counter is clocked
on a 16MHz crystal (according to http://en.wikipedia.org/wiki/Quartz_clock they
are generally good for 6 parts per million for standard grade crystals,
whatever that is).
You can use this in a number of ways.
If you progra
On Sun, May 23, 2010 at 2:02 AM, tenz...@iinet.net.au
wrote:
> I'm seeking a preferably citeable reference to the amount of error in the
> returned result from a Time() command. I want to be
> able to quote the level of error in timing the execution speed of my project.
A reference that probably
On Wed, May 26, 2010 at 01:53:27PM +1000, Martin Visser wrote:
> (And if you don't have a scope or freq. meter) a suitably programmed Arduino
> or similar microcontroller could do this fairly easily for you - probably
> with better than 0.01% precision.
How do we know the Arduino is so precise? :-
(And if you don't have a scope or freq. meter) a suitably programmed Arduino
or similar microcontroller could do this fairly easily for you - probably
with better than 0.01% precision.
Regards, Martin
martinvisse...@gmail.com
On Wed, May 26, 2010 at 10:53 AM, Dion wrote:
> Martin,
>
> That is
On Wed, May 26, 2010, Dion wrote:
> Martin,
>
> That is a very good idea. Thank you!
>
> What makes this especially helpful and I'm anoyed I didn't think of it
> myself, is that an empty app or loop with only the output pulse
> included, can be used to approximate the overhead of the rest of th
Martin,
That is a very good idea. Thank you!
What makes this especially helpful and I'm anoyed I didn't think of it
myself, is that an empty app or loop with only the output pulse
included, can be used to approximate the overhead of the rest of the
system. Effectively giving a potentially mor
Martin,
That is a very good idea. Thank you!
What makes this especially helpful and I'm anoyed I didn't think of it
myself, is that an empty app or loop with only the output pulse
included, can be used to approximate the overhead of the rest of the
system. Effectively giving a potentially mor
Dion,
As a soon-to-graduate EE you might consider using a tool such
as oscilloscope or frequency counter to help more objectively measure
timing. A simple thing to do would be to have your code section run in a
repeating loop. At the end of the loop toggle a physical output - say the
DTR line on a
On 24/05/2010, at 8:47 AM, Glen Turner wrote:
> On Mon, 2010-05-24 at 09:02 +1000, Peter Chubb wrote:
>
>> Actually it doesn't give the whole answer.
>
> Wow, thanks heaps Peter.
Thank you all. Particularly Peter.
That is truly an amazing depth of information to digest.
>
> tenzero: so there
> "Dave" == Dave Kempe writes:
>> 250, on my Debian/sid system running 2.6.32-5-openvz-amd64. FWIW.
>>
>> Daniel
Dave> A little off topic, but, I noticed that the CONFIG_HZ variable
Dave> on openvz systems is often 250. I found 1000 to be a better
Dave> setting for responsiveness on a heavi
> 250, on my Debian/sid system running 2.6.32-5-openvz-amd64. FWIW.
>
> Daniel
A little off topic, but, I noticed that the CONFIG_HZ variable on openvz
systems is often 250. I found 1000 to be a better setting for responsiveness on
a heavily loaded openvz box. It felt like being able to schedul
Glen Turner writes:
> On Mon, 2010-05-24 at 09:02 +1000, Peter Chubb wrote:
>
>> Actually it doesn't give the whole answer.
>
> Wow, thanks heaps Peter.
>
> tenzero: so there are 1000 (CONFIG_HZ) samples per second.
250, on my Debian/sid system running 2.6.32-5-openvz-amd64. FWIW.
Danie
On Mon, 2010-05-24 at 09:02 +1000, Peter Chubb wrote:
> Actually it doesn't give the whole answer.
Wow, thanks heaps Peter.
tenzero: so there are 1000 (CONFIG_HZ) samples per second. For each
sample your program is one of: not scheduled, running in user, running
in system, or has yielded the pro
> "Glen" == Glen Turner writes:
Glen> On Sun, 2010-05-23 at 17:02 +0800, tenz...@iinet.net.au wrote:
>> I'm seeking a preferably citeable reference to the amount of error
>> in the returned result from a Time() command. I want to be able to
>> quote the level of error in timing the execution
On Sun, 2010-05-23 at 17:02 +0800, tenz...@iinet.net.au wrote:
> I'm seeking a preferably citeable reference to the amount of error
> in the returned result from a Time() command. I want to be
> able to quote the level of error in timing the execution speed
> of my project.
"man time" gives the an
On 23/05/2010, at 5:40 PM, Peter Chubb wrote:
>> "tenzero" == tenzero writes:
>
> tenzero> Hi everyone, I'm seeking a preferably citeable reference to
> tenzero> the amount of error in the returned result from a Time()
> tenzero> command. I want to be able to quote the level of error in
>
On Sun, 2010-05-23 at 17:02 +0800, tenz...@iinet.net.au wrote:
> Hi everyone,
>
> I'm seeking a preferably citeable reference to the amount of error in
> the returned result from a Time() command. I want to be
> able to quote the level of error in timing the execution speed of my project.
>
> Wh
> "tenzero" == tenzero writes:
tenzero> Hi everyone, I'm seeking a preferably citeable reference to
tenzero> the amount of error in the returned result from a Time()
tenzero> command. I want to be able to quote the level of error in
tenzero> timing the execution speed of my project.
Do yo
Hi everyone,
I'm seeking a preferably citeable reference to the amount of error in the
returned result from a Time() command. I want to be
able to quote the level of error in timing the execution speed of my project.
While I have been using this command partly on Ubuntu for my project, I would
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