opencl improvements, ie: no float

[totaam]

Issue migrated from trac ticket # 437

component: core | priority: minor | resolution: fixed

2013-10-07 09:44:39: totaam created the issue

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After testing on both GPU and CPU, it seems that using ints instead of floats can give a 50% performance boost for CPU - and interestingly, absolutely zero for GPU.
It might be worth doing anyway sometime, patch attached.
There are probably other performance improvements we could make.

[totaam]

2013-10-08 16:16:31: totaam uploaded file csc_opencl-nofloat-v2.patch (23.5 KiB)

implements all calculations using integers

[totaam]

2013-10-08 16:32:26: totaam changed status from new to closed

[totaam]

2013-10-08 16:32:26: totaam changed resolution from ** to fixed

[totaam]

2013-10-08 16:32:26: totaam commented

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done in r4425 - only tested RGB to YUV (not the other way around).

Gains are between 0% (Intel SDK with AMD CPU) to 50% (AMD SDK with AMD GPU at 420P) - the CSC will need updating...

[totaam]

2014-05-19 13:39:53: totaam commented

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(setting correct milestone the work was completed in)