Exercise 6 C and Cpp solutions are incorrect about exercises-solutions HOT 3 CLOSED

Hi reuk,

Thanks for the issue. There shouldn't be any errors at all - if it's that big something weird is going on. I'll look into it.

I presume the rest of the matmul codes also have big errors on your GPU (Solutions 6-8)?

from exercises-solutions.

Yes, I can confirm that they all have similar error values.
The error values are not constant between the executables (or even multiple runs of the same executable), but they're always of a similar (very great) magnitude.

Thanks for looking into this.

from exercises-solutions.

This is a known issue with the embedded GPU in that version of the MacBook.

The updated version of the solution (v1.2) allows you to specify which device as follows

./mult --list
./mult --device 2

This will allow you to run on the dedicated graphics card.

from exercises-solutions.