[OpenDroneMap-users] Multicore/SMP performance

[StuartL]

Thanks, Piero.  That explains all.  FTR setting that to 4 worked for me 
and didn't hang up.  Admittedly I'm only use four cores so any SMP race 
conditions/deadlocks etc are much less likely to affect me than someone 
running on 64 cores.

Very impressive results, 82 photos taken at 3m intervals, 30m altitude 
using a Phantom 3 Advanced.

Out of curiosity: If I take photos with non-vertical orientation, e.g. 
pointing the camera sideways or at an angle, can ODM automatically 
integrate the results and avoid the voids under overhangs?

I'm so impressed with this software and thank the developers for it.  If 
I had one wish it would be to get slightly higher resolution results.  
Some of the detail from the original photos is lost in the textured 
mesh.  Is this a tunable parameter or a limitation of the current 
implementation?

Stuart


On 03/06/2017 14:22, Piero Toffanin wrote:
>
> Hi Stuart,
>
> You can use more cores by setting the "opensfm-processes" option. By 
> default we've set it at 1 because a fault is causing the program to 
> get stuck sometimes with more cores: 
> https://github.com/OpenDroneMap/OpenDroneMap/pull/579
>
> Increasing the number of cores at compilation does not influence 
> runtime behavior, it just compiles faster :)
>
>
> On 06/03/2017 06:54 AM, StuartL wrote:
>> Hi,
>>
>> I'm running a new install of ODM in a VirtualBox Ubuntu guest VM on 
>> Windows.  The guest VM has four cores but ODM only seems to use one 
>> core.
>>
>> Looking at some other posts people seem to be talking about using 
>> massive numbers of cores so I feel like I must be doing something wrong.
>>
>> Possibly relevant information:
>> - ODM was originally compiled with only one core in the VM.  I later 
>> increased the number of cores.
>> - I'm measuring it using one core by monitoring with 'top' and 
>> pressing '1' to reveal individual CPU cores.  At all steps so far 
>> (currently up to Computing depthmap for...) it seems to flatline one 
>> core but the others are nearly idle.
>>
>> Does it deduce the number of cores at point of compilation?  Do I 
>> need to enable something to allow multi-core support?  Are the steps 
>> I've observed so far all single-threaded?
>>
>> Thanks for a wonderful piece of software!
>>
>> Stuart
>> _______________________________________________
>> OpenDroneMap-users mailing list
>> OpenDroneMap-users at lists.osgeo.org
>> https://lists.osgeo.org/mailman/listinfo/opendronemap-users
>

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.osgeo.org/pipermail/opendronemap-users/attachments/20170603/2ce90dc0/attachment.html>