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Old 07-26-2011, 04:11 PM   #1
nutpantz
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is there any way to time out a conversion?

i was converting a few books that i wanted to take with me on a trip.
i set everything up and set it to batch convert 25 files to epubs before i went to sleep.
when i woke up it was still converting the second file.. at hundreds of minutes in progress.

is there any way to set a time out to skip the conversion if it takes loner than say 10 minutes???


thanks for any info..

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Old 07-26-2011, 04:38 PM   #2
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Old 07-29-2011, 03:52 PM   #3
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Sounds like a good idea to add.
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Old 07-31-2011, 06:42 AM   #4
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Old 07-31-2011, 08:21 AM   #5
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Why? As long as there is no error, the conversion is still running, regardless of how long it takes. Why would I want to interrupt it just because it is taking longer than X minutes?
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Old 07-31-2011, 10:20 AM   #6
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Hmm, I have just converted a large number of books.

1) My system was converting more than one at a time. So if one hung, it would keep coverting.

2) When it flat could not convert a book, it returned an error message and kept on coverting.

3) I did have oe book that took a very long time to convert (more time to convert that one that to convert over 100 other ones).
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Old 07-31-2011, 06:53 PM   #7
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This happened to me earlier today, set up to batch convert 6 books, came back half an hour later to an overheated laggy laptop that hadn't even done the first conversion yet...

I was converting Lit to Mobi if that makes any difference.
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Old 07-31-2011, 10:25 PM   #8
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This happened to me earlier today, set up to batch convert 6 books, came back half an hour later to an overheated laggy laptop that hadn't even done the first conversion yet...

I was converting Lit to Mobi if that makes any difference.
Some books take a long time to convert. The odds are any book that takes longer than 20 minutes started its life in MS Word (like your lit file) and has 10s of thousands of lines of css / @font face stuff that it is sorting out.

Either let your machine run the 1 to 24 hours needed to complete the conversion (my longest was 6 hours) or set the book aside and look for a new source for that book.
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Old 08-01-2011, 10:22 AM   #9
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One reason why I wanted a timeout too was that, there e.g. there can be 4 threads running simulataneuosly (one per core?), On the 1st job the conversion of the book started to take ages, then another and so on until all Job threads were in use. I had many other tasks, they did not get done by when I needed them. 2 were really important. I know I could prioritise the order but a failsafe timeout would be great.
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Old 08-01-2011, 10:39 AM   #10
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Originally Posted by oldbwl View Post
One reason why I wanted a timeout too was that, there e.g. there can be 4 threads running simulataneuosly (one per core?), On the 1st job the conversion of the book started to take ages, then another and so on until all Job threads were in use. I had many other tasks, they did not get done by when I needed them. 2 were really important. I know I could prioritise the order but a failsafe timeout would be great.
There are preferences that control use of CPU(cores), Priority and number of threads.
More/bigger is not always better (unless we are talking RAM to run in )
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Old 08-01-2011, 11:39 AM   #11
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There are preferences that control use of CPU(cores), Priority and number of threads.
More/bigger is not always better (unless we are talking RAM to run in )
True, so if I restricted it to 1 thread, does that mean a job will share all avail cores? or will the CPU have one in use and 3 idle?

If the latter, there will be no effect.

If the former, then my situation would not change much, these jobs lasted over 10 hours, the 1st job would have been reduced to 2.5 hours approx, and that would be still too long. It would have to do all four in serial before it got to the important jobs.

The CPU gets real hot on these long jobs evidenced by the fan kicking in on high rpms, so there is another reason to desire this facility.
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Old 08-01-2011, 11:59 AM   #12
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A timeout wouldn't change your situation either. The conversion would stop, but it wouldn't be finished, so you'd have no converted book.

Your fan switching to higher RPMs isn't necessarily bad, that should happen if you're running CPU intensive tasks, which a conversion definitely is. If you feel your system is getting too hot, try monitoring the temperature, but that would be a hardware problem, not a Calibre problem. Computers do enjoy getting the lint removed once in a while, by the way...

Edited to add: As far as I know, conversions are singlethreaded, so if you start only one conversion, it'll take (mostly) the same time as when you'd start as many as you have cores available.
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Old 08-01-2011, 12:41 PM   #13
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You can manually stop any conversion by clicking on little circle in bottom right corner
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Old 08-01-2011, 01:21 PM   #14
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True, so if I restricted it to 1 thread, does that mean a job will share all avail cores? or will the CPU have one in use and 3 idle?

If the latter, there will be no effect.

If the former, then my situation would not change much, these jobs lasted over 10 hours, the 1st job would have been reduced to 2.5 hours approx, and that would be still too long. It would have to do all four in serial before it got to the important jobs.

The CPU gets real hot on these long jobs evidenced by the fan kicking in on high rpms, so there is another reason to desire this facility.
The fan is doing its job, that is all. The slower the fan (when not needed) the longer your battery lasts. Fans used to be single speed (and CPU's a lot weaker )The CPU should throttle if the fan can't keep up with the load.

NOT maxing out all cores should help :thumbsup (AFAIK a thread does not spread across cores. Start task manager and tick show seperate... then run 1 conversion) .

Limiting the cores used leaves some for your other tasks (one of your complaints)
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Old 08-01-2011, 09:09 PM   #15
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One reason why I wanted a timeout too was that, there e.g. there can be 4 threads running simulataneuosly (one per core?), On the 1st job the conversion of the book started to take ages, then another and so on until all Job threads were in use.
If all cores were in use then you had multiple books being converted and they were all taking long. If you noticed it taking a long time then open the jobs window (clicking on jobs in the lower right corner) and stop the one job that is holding you up, then restart that book conversion when you have time.

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I had many other tasks, they did not get done by when I needed them. 2 were really important. I know I could prioritise the order but a failsafe timeout would be great.
Were the other tasks books being converted? If they weren't books being converted then you can prioritize all other tasks by going to Preferences - Behavior and changing Job priority to low.

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True, so if I restricted it to 1 thread, does that mean a job will share all avail cores? or will the CPU have one in use and 3 idle?
No, I believe it is one job, one core.

Quote:
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these jobs lasted over 10 hours
If these books are your creation then save them out of Word as html filtered and the conversion time will drop drastically.

Quote:
Originally Posted by oldbwl View Post
The CPU gets real hot on these long jobs evidenced by the fan kicking in on high rpms, so there is another reason to desire this facility.
The fan / cpu settings are by design. This is a hardware issue, if you don't want your CPU running as configured then tweak the Bios so it runs slower. If it used to run cooler then buy a can of air, open it up and spray out the dust that has accumulated.
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