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the729
Journeyman III

Reduction kernel slow and unstable?

Reduction kernels runs very slow on my system.

I simply tried the sample reduction code with default size (64x64) and got the result:

Width   Height  Iterations      GPU Total Time 
64      64      1               1.781000

And I got segment fault when I try './reduction -i 2 -t'.

I wonder if the segment-fault problem is also related to the second-iteration problem I just posted.

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This is a known issue and is being worked on.