[ptx] [ hugin-Feature Requests-1393960 ] Add multi-processing support to nona

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Feature Requests item #1393960, was opened at 2005-12-30 22:36
Message generated for change (Comment added) made by dangelo
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Category: None
Group: None
Status: Open
Priority: 5
Submitted By: Hal Engel (hvengel)
>Assigned to: Pablo d'Angelo (dangelo)
Summary: Add multi-processing support to nona

Initial Comment:
With X2 processors begining to see significant
acceptance and with X4 processors likely to start
appearing in systems in mid to late 2006 it seems like
it would be a good time to start looking at adding
support for nona to run multipule threads to take
advantage of the processing power that these new
processors provide.  Seems like a shame to buy an
expensive processor and only have applications use 1/2
or 1/4 of it's power.  Particularly applications like
nona that benifit greatly from more CPU power and, it
seems to me (but I could be wrong), should not be
particularly difficult to multithread. 


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>Comment By: Pablo d'Angelo (dangelo)
Date: 2005-12-31 08:28

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Hi!

This is true. It should be quite easy to implement by just
dividing the remapped image in several areas hand have each
thread render its area.

However, I'm currently working on the vignetting correction.
After that, I'll take a look at multithreaded remapping.

Does anyone know if it good if the threads work with the
same memory area of if its better if each thread uses a
different memory area?

ciao
  Pablo

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Comment By: Ippei UKAI (ippei)
Date: 2005-12-31 03:05

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In fact, I had a chance to try HuginOSX on a G5 Quad last week.
It indeed uses one of the CPU core 100% leaving three quarters of the CPU power 
untouched. 

I also wold like to point out that Dual CPU on Mac and the hyper-threading on 
PC are already common. 

We should give a high priority on this improvement as we are looking at the 
possibility of fastening the stitching 2x or 4x with relatively easy modification.

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