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Lab06_sln on sharc #2

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@Robadob

Running Lab06_sln on sharc DGX-1, both exercises report errors.

Both issues appears to be a case of floating point precision:

...
Device item c[1023][1011] = 258.839966 does not mach host result 258.839996
Device item c[1023][1017] = 254.745224 does not mach host result 254.745209
Device item c[1023][1022] = 254.512711 does not mach host result 254.512726
...

This is building as sm_35, when I updated to sm_61 I instead received an Invalid device symbol error at runtime after the initial memcpy.

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