[ESS] distinguish busy from non-busy waiting

[Andreas Leha]

Hi Vitalie,

Thanks for following up on this!

> Your definition means busy means that CPU resources are used.

Well, yes and no.  I am using this (manually by looking at 'top').  But
I think this is only a surrogate for whether the prompt is still 'waiting'
for input or not.

> I think this is
> doable (on linux,mac at least). You can monitor PID of R's process for CPU usage
> periodically.

So, you are basically suggesting that emacs should look at top for me,
right?  That would be possible, I guess.  But still, that might give
wrong answers if R has to wait for I/O a lot, for instance.

Best,
Andreas

>
> The current implementation of busy/not-busy relies on prompts and it's quite
> flawed indeed.
>
>   Vitalie
>
>>> On Thu, Nov 26 2015 11:55, Andreas Leha wrote:
>
>> Hi all,
>
>> Is there a way to tell from ess' GUI whether R is busy doing something
>> or whether R is waiting for the completion of the user input?
>
>> Consider this example file
>
>> Sys.sleep(
>>   10)
>
>> Sys.sleep(
>>   10
>
>> If I do `ess-eval-paragraph-and-step' on one after the other I get
>
>> ,----
>> | > 
>> | + 
>> `----
>
>> from the first and
>
>> ,----
>> | > 
>> | + + 
>> `----
>
>> from the second.
>
>> In both cases there is a spinning wheel in the mode line.
>
>> So, the number of '+' signs seems to be the only visible difference.
>> Counting the plus sings is not an option for real examples, of course.
>
>> Hence my question: Is there a way to immediately tell from the interface
>> whether the command is complete?
>
>> I quite often wait in vain due to a missing ')' and only a glance at the
>> output of 'top' or similar will help here.
>
>> Thanks,
>> Andreas
>
>> ______________________________________________
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>> https://stat.ethz.ch/mailman/listinfo/ess-help
>
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