Hi again,
I'm getting some mixed messages from PS when running it on a mid-2011 iMac (3.4 Core i7, Radeon HD 697M 2Gb). I'm running MacOS 10.8.4.
If I enable the Radeon in the OpenCL preferences, it does seem to contribute in a very small way to speeding things up, but in the console PS seems to be disabling it:
Using device: ATI Radeon HD 6970M, 12 compute units, 1024 MB global memory
max work group size 1024
max work item sizes [1024, 1024, 1024]
max mem alloc size 256 MB
initializing...
selected 7 cameras from 7 in 0.00338 sec
Loading photos...
Reconstructing depth...
[CPU] estimating 1774x2277x288 disparity using 887x1139x8u tiles, offset -2
[GPU] estimating 2150x2317x576 disparity using 538x580x8u tiles, offset -379
GPU processing failed, switching to CPU mode
But further down in the log, it does appear to be using it in the build:
finished depth reconstruction in 514.051 seconds
Device 1 performance: 57.8953 million samples/sec (CPU)
Device 2 performance: 57.3216 million samples/sec (ATI Radeon HD 6970M)
Total performance: 115.217 million samples/sec
Generating mesh...
5467149 points extracted
Any ideas why this would be the case? Should I not be seeing a better boost from the GPU as well?
I've also run this on a newer iMac with the Nvidia GTX 680MX, and that one works wonderfully, almost cutting the geom build time in half.
Cheers, -Chad