Groups > comp.lang.java.programmer > #16786

Re: How can you make idle processors pick up java work?

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From	"Patricia Shanahan" <patricia.shanahan@1:261/38.remove-dpk-this>
Subject	Re: How can you make idle processors pick up java work?
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  To: qwertmonkey
From: Patricia Shanahan <pats@acm.org>

On 7/30/2012 4:27 PM, qwertmonkey@syberiaoutpost.ru wrote:
>>> Is there a way to make these processors pick up/share work also, or
>>> do you have to use some sort of scheduling framework on top of java?
>
>> Use multiple threads?
> ~
>   a) I need to actually scan large text files (10+ million lines).
>   b) On each line there is a NL sentence.
>   c) That processing should be run only once, but as fast as possible.
> ~
>   d) If you go:
>   d.1) int iPrx = Runtime.getRuntime().availableProcessors();
>   d.2) count all lines
>   d.3) split the file in (total lines)/iPrx
>   d.4) then run iPrx threads (or executable instances using a batch script)
>   the time you waste on d.2) and d.3) will make all that strat senseless

Why worry about splitting by actual line count, rather than by byte position in 
file?

Patricia

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Thread

How can you make idle processors pick up java work? "qwertmonkey" <qwertmonkey@1:261/38.remove-dpk-this> - 2012-07-31 18:02 +0000
  Re: How can you make idle processors pick up java work? "David Lamb" <david.lamb@1:261/38.remove-dpk-this> - 2012-07-31 18:02 +0000
  Re: How can you make idle processors pick up java work? "Patricia Shanahan" <patricia.shanahan@1:261/38.remove-dpk-this> - 2012-07-31 18:02 +0000
  Re: How can you make idle processors pick up java work? "Joshua Cranmer" <joshua.cranmer@1:261/38.remove-dpk-this> - 2012-07-31 18:02 +0000
  Re: How can you make idle processors pick up java work? "John B. Matthews" <john.b..matthews@1:261/38.remove-dpk-this> - 2012-07-31 18:02 +0000

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