Please stay awake!
Please stay awake!
- Subject: Please stay awake!
- From: Jim Elliott <email@hidden>
- Date: Tue, 10 Dec 2013 00:17:01 +0100
I have a program that solves problems that are very computationally intense. I divide up the work and create an NSOperation for each segment. Then I put the operations in NSOperationQueue, and start the queue. Expecting the job to take three or four hours, I go to dinner.
When I return, and look at my progress screen, I find that processing has stopped sometime about an hour into the job. My mouse events restart the job, and it later completes, about four hours later than estimated.
Apparently, after a give time interval without user intervention, MAC OS just goes to sleep until some user input is detected. I mean not just screen saver, but processing shutdown.
Any ideas as to how I keep my megajob running in my absence?
Incidentally, sometimes the work performed by each of the operations (threads) is widely asymmetrical? Any explanations?
j
Jim Elliott
email@hidden
2732 NW Thurman Street, Portland, OR 97210 USA
Tel. +1 (503) 481-5370
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